Adjustable mechanical diverter structure

Abstract

The adjustable mechanical steering gear structure can adjust the transmission pair and the steering gear according to different space arrangements and different strokes, is suitable for vehicle models with different space arrangements and different strokes, can be quickly put into use in the early stage of project development, can effectively shorten the development period, and can effectively reduce the sample cost.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical steering systems. Specifically, this utility model relates to an adjustable mechanical steering system structure. Background Technology

[0002] Currently, there are various types of mechanical steering gears, such as rack and pinion steering gears, recirculating ball steering gears, and worm gear crank pinion steering gears. When the driver turns the steering wheel, the steering control system transmits torque to the input end of the steering gear, causing the pinion at the input end to rotate. The pinion meshes with the rack and pushes the rack to move left and right, thereby driving the tie rod and wheel deflection, thus achieving the steering function. With the development of the automotive industry, car manufacturers are launching each model at an increasingly rapid pace, and different models have different layouts. To ensure the transmission efficiency of the steering system and the requirements for control torque fluctuations, the system layout has spatial angle requirements. In the early stages of project development, when the spatial angle changes, the angle and length of the steering gear pinion cannot be adjusted, rendering the existing steering gear unusable. Components such as the steering gear housing and pinion need to be re-molded. Furthermore, the steering gear stroke is fixed and cannot be adjusted, which will not meet the requirements when the steering stroke of the newly developed model changes, extending the development cycle and increasing the prototype cost.

[0003] To address the aforementioned issues, patent document application number 2023223900358 discloses an automotive steering system and an automotive vehicle. The automotive steering system includes a steering system housing, which comprises a gear shaft housing and a rack housing, both cylindrical and interconnected, with a pinion shaft and a rack respectively installed inside each. It also includes a first mounting seat that is sleeved onto the rack housing through a socket hole. The steering system housing is mounted on a subframe via the first mounting seat. The outer wall of the rack housing is provided with one or more circumferentially spaced locating pins, and the inner wall of the socket hole of the first mounting seat is provided with several circumferentially spaced locating holes. However, this design fails to solve the aforementioned problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, an adjustable mechanical steering gear structure is provided that can be applied to different spatial layouts and different travel vehicle models, can be quickly put into use in the early stage of project development, can effectively shorten the development cycle, and can effectively reduce the cost of prototypes. Summary of the Invention

[0005] This utility model is designed to solve the aforementioned problems. Its purpose is to provide an adjustable mechanical steering gear structure that is applicable to different spatial arrangements and vehicle models with varying travel distances, can be quickly deployed in the early stages of project development, effectively shortens the development cycle, and significantly reduces prototype costs. To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an adjustable mechanical steering gear structure, which includes a housing, a transmission pair, a guide assembly, a sealing assembly, and a steering actuation assembly. The transmission pair is disposed inside the housing, the guide assembly is disposed on the housing, the sealing assembly is disposed inside the housing, and the steering actuation assembly is connected to the transmission pair.

[0006] The adjustable mechanical steering gear structure provided by this utility model may also have the following features: the housing includes a first housing, a second housing, and a housing extension inner tube; the first housing is provided with a first connecting flange; the second housing is provided with a second connecting flange; the second connecting flange is provided with a connecting hole; the first connecting flange is provided with a through hole adapted to the connecting hole; and the housing extension inner tube is movably connected to the second housing.

[0007] The adjustable mechanical steering gear structure provided by this utility model may also have the following features: the transmission pair includes a splined shaft, an inner splined sleeve, a pinion, and a rack; a pinion mounting flange is provided on the first housing; the pinion is disposed inside the pinion mounting flange; the splined shaft is movably connected to the pinion; the inner splined sleeve is disposed at the connection between the splined shaft and the pinion; the rack is disposed inside the housing; and the pinion meshes with the rack.

[0008] The adjustable mechanical steering gear structure provided by this utility model may also have the following feature: the guide component includes a rack clamping block, which is movably disposed in the housing and abuts against the rack.

[0009] The adjustable mechanical steering gear structure provided by this utility model may also have the following features: the guide assembly further includes a rack support and an inner ball seat. The rack support is disposed inside the housing and connected to the rack; the inner ball seat is disposed at the end of the rack and is movably connected to the rack.

[0010] The adjustable mechanical steering gear structure provided by this utility model may also have the following feature: the guide assembly further includes a soft stop, which is disposed on the rack.

[0011] The adjustable mechanical steering gear structure provided by this utility model may also have the following feature: the sealing assembly includes a first dust cover and a second dust cover, the first dust cover is disposed on the transmission pair, and the second dust cover is disposed at the inner ball seat.

[0012] The adjustable mechanical steering gear structure provided by this utility model may also have the following features: the steering actuation component includes an inner tie rod, an outer tie rod, and a ball joint assembly; one end of the inner tie rod is connected to an inner ball seat; one end of the inner tie rod is connected to the outer tie rod; and the end of the outer tie rod away from the inner tie rod is connected to the ball joint assembly. The technical advantages of this utility model are as follows: The adjustable mechanical steering gear structure provided by this utility model includes a housing, a transmission pair, a guide assembly, a sealing assembly, and a steering actuation assembly. The transmission pair is disposed inside the housing, the guide assembly is disposed on the housing, the sealing assembly is disposed inside the housing, and the steering actuation assembly is connected to the transmission pair. It can adjust the transmission pair and steering gear according to different spatial arrangements and different strokes, thus being suitable for vehicle models with different spatial arrangements and different strokes. It can be quickly put into use in the early stage of project development, effectively shortening the development cycle and effectively reducing prototype costs. Attached Figure Description

[0013] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the adjustable mechanical steering gear structure in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the adjustable mechanical steering gear structure in an embodiment of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the shell structure in an embodiment of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the shell structure in an embodiment of this utility model. Figure 2 ; Figure 5 This is a cross-sectional view of the shell in an embodiment of this utility model; Figure 6 This is a cross-sectional view of the transmission pair in an embodiment of this utility model; Figure 7 This is a cross-sectional view of the connection between the inner ball seat and the rack in an embodiment of this utility model.

[0014] The components in the diagram are labeled as follows: Housing-10, First Housing-11, First Connecting Flange-111, Pinion Mounting Flange-112, Second Housing-12, Second Connecting Flange-121, Connecting Hole-122, Housing Extension Inner Tube-13, Transmission Pair-20, Spline Shaft-21, Inner Spline Sleeve-22, Pinion-23, Rack-24, Guide Assembly-30, Rack Pressing Block-31, Rack Support-32, Inner Ball Seat-33, Soft Stopper-34, Sealing Assembly-40, First Dust Cover-41, Second Dust Cover-42, Steering Actuation Assembly-50, Inner Tie Rod-51, Outer Tie Rod-52, Ball Joint Assembly-53. Detailed Implementation

[0015] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0016] Figure 1 This is a schematic diagram of the adjustable mechanical steering gear structure in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the adjustable mechanical steering gear structure in an embodiment of this utility model. Figure 2 .

[0017] like Figure 1 and Figure 2 As shown, the adjustable mechanical steering gear structure provided by this utility model includes a housing 10, a transmission pair 20, a guide assembly 30, a sealing assembly 40, and a steering actuation assembly 50. The transmission pair 20 is disposed inside the housing 10, the guide assembly 30 is disposed on the housing 10, the sealing assembly 40 is disposed inside the housing 10, and the steering actuation assembly 50 is connected to the transmission pair 20. It can adjust the transmission pair 20 and the steering gear according to different spatial arrangements and different strokes, thus being suitable for vehicle models with different spatial arrangements and different strokes. It can be quickly put into use in the early stage of project development, effectively shortening the development cycle and effectively reducing the cost of prototypes.

[0018] Figure 3 This is a schematic diagram of the shell structure in an embodiment of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the shell structure in an embodiment of this utility model. Figure 2 ; Figure 5 This is a cross-sectional view of the shell in an embodiment of this utility model.

[0019] like Figure 3 , Figure 4 as well as Figure 5 As shown, the housing 10 includes a first housing 11, a second housing 12, and a housing extension inner tube 13. The first housing 11 is provided with a first connecting flange 111, and the second housing 12 is provided with a second connecting flange 121. The second connecting flange 121 is provided with a connecting hole 122, which is an arc-shaped waist-shaped hole. The first connecting flange 121 is provided with a circular through hole that matches the connecting hole 122. Bolts pass through the circular through hole and the connecting hole 122 and are tightened to connect the first housing 11 and the second housing 12. Loosening the bolts allows relative rotation between the first housing 11 and the second housing 12. The housing extension inner tube 13 is movably connected to the second housing 12 and is embedded in the second housing 12, so that the housing 10 can provide installation positions for the other components of the steering gear.

[0020] Figure 6This is a cross-sectional view of the transmission pair in an embodiment of this utility model.

[0021] like Figure 6 As shown, the transmission pair 20 includes a splined shaft 21, an inner splined sleeve 22, a pinion 23, and a rack 24. The steering system is connected to the splined shaft 21, which has an external thread, while the pinion 23 has an internal thread. The splined shaft 21 and the pinion 23 are connected by threads, allowing for length adjustment between them to adjust the length of the steering input end. Both the splined shaft 21 and the pinion 23 have external splines, which are connected to the inner splined sleeve 22 via splines. This inner splined sleeve 22 is positioned at the connection between the splined shaft 21 and the pinion 23, serving a fixing and torque transmission function. The pinion 23 meshes with the rack 24. The pinion 23 and the rack 24 are the core transmission pair of the rack and pinion steering system. The rotation of the steering column is transmitted to the rack 24 through the pinion 23, converting the rotational motion into the linear reciprocating motion of the rack 24, which in turn drives the steering wheels on both sides to deflect.

[0022] The first housing 11 is provided with a pinion mounting flange 112, and the pinion 23 is set inside the pinion mounting flange 112. When it is necessary to adjust the axis angle of the pinion 23 to adapt to different vehicle models, the bolt is loosened and the second housing 12 is rotated for adjustment. This will change the axis angle of the pinion 23 relative to the mounting point plane position on the pinion mounting flange 112, thereby realizing the angle adjustment function.

[0023] The guide assembly 30 includes a rack clamping block 31, which is movably disposed within the housing 10 and the first housing 11. The rack clamping block 31 abuts against the rack 24 to ensure that the pinion 23 and the rack 24 can mesh smoothly and stably, thus ensuring the stability of the steering process.

[0024] The guide assembly 30 also includes a rack support 32 and an inner ball seat 33. The rack support 32 is disposed inside the housing 10 and is movably connected to the rack 24. The rack support 32 plays a role in positioning and supporting, and must have sufficient rigidity to ensure that the movement trajectory of the rack 24 is normal. The inner ball seat 33 is disposed at the end of the rack 24. The inner ball seat 33 is used to connect the rack 24 and the steering actuator 50. The ball head structure inside the inner ball seat 33 can achieve multi-directional rotation, ensuring smooth connection between the linear movement of the rack 24 and the swing of the steering actuator 50, and avoiding motion interference.

[0025] The guide assembly 30 also includes a soft stop 34, which is disposed on the rack 24. When the steering is turned to the limit position (such as turning the steering wheel all the way), the soft stop 34 can buffer the impact of the rack 24 on the housing 10, reduce abnormal noise and vibration. At the same time, the soft stop 34 can limit the maximum stroke of the rack 24 to prevent the transmission pair from being overloaded and damaged.

[0026] Figure 7 This is a cross-sectional view of the connection between the inner ball seat and the rack in an embodiment of this utility model.

[0027] like Figure 7 As shown, the inner ball seat 33 is movably connected to the rack 24. In the steering gear, the left and right travel of the rack 24 is determined by the distance between the soft stop 34 and the inner ball seat 33. The inner ball seat 33 and the rack 24 are connected by a thread. Rotating the inner ball seat 33 can adjust the distance between it and the soft stop 34, thereby adjusting the working stroke of the rack 24.

[0028] The sealing assembly 40 includes a first dust cover 41 and a second dust cover 42. The first dust cover 41 is disposed on the transmission pair 20 to isolate external dust, mud, and water, preventing impurities from entering the transmission pair 20 and wearing the pinion 23 and rack 24, while also preventing internal grease leakage and ensuring the lubrication effect of the moving parts. The second dust cover 42 is disposed at the inner ball seat 33 to isolate external dust, mud, and water, preventing impurities from entering the transmission pair 20 and wearing the inner ball seat 33 and rack 24, while also preventing internal grease leakage and ensuring the lubrication effect of the moving parts.

[0029] The steering actuator 50 includes an inner tie rod 51, an outer tie rod 52, and a ball joint assembly 53. One end of the inner tie rod 51 is connected to the inner ball seat 33, and the other end of the inner tie rod 51 is connected to the outer tie rod 52. The inner tie rod 51 connects the inner ball seat 33 and the outer tie rod 52 and is an intermediate component for transmitting steering force, possessing high tensile strength. The end of the outer tie rod 52 away from the inner tie rod 51 is connected to the ball joint assembly 53. The ball joint structure of the ball joint assembly 53 can adapt to the deflection and vertical movement of the steering wheel, and the inside of the ball joint is filled with grease.

[0030] The adjustable mechanical steering gear structure provided by this utility model includes a housing 10, a transmission pair 20, a guide assembly 30, a sealing assembly 40, and a steering actuation assembly 50. The transmission pair 20 is disposed inside the housing 10, the guide assembly 30 is disposed on the housing 10, the sealing assembly 40 is disposed inside the housing 10, and the steering actuation assembly 50 is connected to the transmission pair 20. It can adjust the transmission pair 20 and the steering gear according to different spatial arrangements and different strokes, thus being suitable for vehicle models with different spatial arrangements and different strokes. It can be quickly put into use in the early stage of project development, effectively shortening the development cycle and effectively reducing the cost of prototypes.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An adjustable mechanical steering gear structure, characterized in that, The device includes a housing (10), a transmission pair (20), a guide assembly (30), a sealing assembly (40), and a steering actuation assembly (50). The transmission pair (20) is disposed inside the housing (10), the guide assembly (30) is disposed on the housing (10), the sealing assembly (40) is disposed inside the housing (10), and the steering actuation assembly (50) is connected to the transmission pair (20).

2. The adjustable mechanical steering gear structure according to claim 1, characterized in that, The housing (10) includes a first housing (11), a second housing (12), and a housing extension inner tube (13). The first housing (11) is provided with a first connecting flange (111), the second housing (12) is provided with a second connecting flange (121), the second connecting flange (121) is provided with a connecting hole (122), the first connecting flange (111) is provided with a through hole adapted to the connecting hole, and the housing extension inner tube (13) is movably connected to the second housing (12).

3. The adjustable mechanical steering gear structure according to claim 2, characterized in that, The transmission pair (20) includes a spline shaft (21), an inner spline sleeve (22), a pinion (23), and a rack (24). The first housing (11) is provided with a pinion mounting flange (112). The pinion (23) is disposed in the pinion mounting flange (112). The spline shaft (21) is movably connected to the pinion (23). The inner spline sleeve (22) is disposed at the connection between the spline shaft (21) and the pinion (23). The rack (24) is disposed in the housing (10). The pinion (23) meshes with the rack (24).

4. The adjustable mechanical steering gear structure according to claim 3, characterized in that, The guide assembly (30) includes a rack clamping block (31), which is movably disposed within the housing (10) and abuts against the rack (24).

5. The adjustable mechanical steering gear structure according to claim 4, characterized in that, The guide assembly (30) further includes a rack support (32) and an inner ball seat (33). The rack support (32) is disposed inside the housing (10) and connected to the rack (24). The inner ball seat (33) is disposed at the end of the rack (24) and is movably connected to the rack (24).

6. The adjustable mechanical steering gear structure according to claim 5, characterized in that, The guide assembly (30) also includes a soft stop (34) disposed on the rack (24).

7. The adjustable mechanical steering gear structure according to claim 6, characterized in that, The sealing assembly (40) includes a first dust cover (41) and a second dust cover (42), the first dust cover (41) being disposed on the transmission pair (20) and the second dust cover (42) being disposed at the inner ball seat (33).

8. The adjustable mechanical steering gear structure according to claim 7, characterized in that, The steering actuator (50) includes an inner tie rod (51), an outer tie rod (52), and a ball joint assembly (53). One end of the inner tie rod (51) is connected to the inner ball seat (33), and one end of the inner tie rod (51) is connected to the outer tie rod (52). The end of the outer tie rod (52) away from the inner tie rod (51) is connected to the ball joint assembly (53).

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