Light truck steering transmission system and vehicle

Abstract

A steering transmission system of a light-duty truck and a vehicle belong to the technical field of steering transmission systems, and comprise an angle steering gear connected with a steering wheel, the angle steering gear is mounted on a longitudinal beam of a frame through an angle steering gear support, and the angle steering gear is connected with a gear rack steering gear through a steering transmission shaft. The gear rack steering gear is fixedly installed on an auxiliary frame of the independent suspension, force transmission between the steering wheel and the gear rack steering gear is achieved through the arrangement of the angle steering gear and the steering transmission shaft, the independent suspension is matched with the gear rack steering gear, and the structure of a steering transmission mechanism is simplified; the steering sensitivity of the vehicle can be improved, so that a driver can more accurately control the direction of the vehicle in the driving process; besides, the independent suspension can better absorb vibration and impact of the road surface, and the gear rack steering gear reduces friction and collision among components, so that noise in the steering process is reduced, and riding comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steering transmission system technical field, in particular to a light truck steering transmission system and vehicle. BACKGROUND

[0002] In the steering system of the vehicle, the steering wheel transmits torque to the steering gear through the steering transmission shaft to realize the steering of the vehicle, and the steering gear is a core component in the steering system, which amplifies and slows down the torque transmitted by the steering transmission shaft, and then outputs to the steering drag link mechanism, the steering gear usually contains a gear and rack mechanism, a circulating ball mechanism or other types of transmission mechanism, which can effectively convert the small torque applied by the driver into a large torque to drive the steering of the wheels.

[0003] At present, most of the suspension systems of light truck products adopt steel plate spring matched hydraulic circulating ball steering gears, and the steel plate spring matched hydraulic circulating ball steering gear mode has been widely applied due to its advantages in carrying capacity, transmission efficiency and cost benefit.

[0004] However, the matching mode of the existing steel plate spring matched hydraulic circulating ball steering gear has relatively low comfort and smoothness, and the maintenance cost is high, specifically, the rigidity of the steel plate spring is relatively large, and the absorption capacity of the road vibration is limited, which leads to the decrease of the vehicle ride comfort, the internal and external friction of the hydraulic circulating ball steering gear generates a large amount of heat under the condition of high speed and high load, which easily causes the temperature rise to be too high, and affects the precision and service life of the steering gear, and the hydraulic circulating ball steering gear has high reverse efficiency, when the wheels are subjected to external resistance, a part of the energy will be transmitted to the steering wheel through the steering system, which leads to the unnecessary feedback force felt by the driver. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems in the above background art that the existing light truck suspension system mostly adopts steel plate spring matched hydraulic circulating ball steering gear, the comfort and smoothness are relatively low, and the maintenance cost is high, the utility model provides a light truck steering transmission system and vehicle.

[0006] The utility model technical scheme is as follows:

[0007] The utility model provides a kind of light truck steering transmission system, including the corner steering gear for being connected with steering wheel, corner steering gear is installed on the frame longitudinal beam by corner steering gear support, corner steering gear is connected with rack and pinion steering gear by steering transmission shaft, rack and pinion steering gear is fixedly installed on the auxiliary frame of independent suspension, using the setting mode of independent suspension cooperation rack and pinion steering gear, the structure of steering transmission mechanism can be greatly simplified, it is convenient to maintain and maintenance cost is low, rack and pinion steering gear can be directly connected with left and right steering tie rod, wheel deflection is driven by steering knuckle, complex components are saved, rack and pinion steering gear has the characteristics of high steering sensitivity, can quickly respond to the steering instruction of driver, when being used with independent suspension, the steering sensitivity of vehicle can be further improved, so that driver can more accurately control the direction of vehicle during driving, and independent suspension can reduce the mutual interference of wheel during driving, to improve the driving stability of vehicle, simultaneously, the accurate control of rack and pinion steering gear also helps to maintain the driving trajectory of vehicle, reduces the phenomenon of roll and deviation;In addition, independent suspension usually uses relatively soft spring and shock absorber, can better absorb road vibration and impact, rack and pinion steering gear, reduces the friction and collision between components, to reduce noise during steering, improves ride comfort.

[0008] Preferably, the corner steering gear support is a bent plate structure, the multiple surfaces formed by bending support each other, forming a stable three-dimensional structure, which can better disperse and resist stress when subjected to external force, thereby improving the stability of the overall structure, and while maintaining the same load-carrying capacity, the weight can be significantly reduced, facilitating installation and use.

[0009] Preferably, the corner steering gear support includes a first connecting portion and a second connecting portion, two first connecting portions are provided, and the second connecting portion is located below the two first connecting portions. The first connecting portion and the second connecting portion are fixedly connected by a bending portion to support each other through the multiple surfaces formed by bending, forming a stable three-dimensional structure.

[0010] Preferably, the two first connecting portions are oppositely arranged, a plurality of horizontally arranged long holes are formed in the first connecting portion for fixed connection with the frame longitudinal beam by bolts. Since the steering transmission shaft has a fixed length and cannot be adjusted during vehicle installation, there may be deviations between actual working conditions and design results. The hole positions on the first connecting portion of the corner steering gear support are designed as long holes, which can be adjusted within a certain range during vehicle assembly to avoid assembly mismatching and improve the flexibility of installation layout.

[0011] Preferably, a plurality of round holes are formed in the second connecting portion for fixed connection of the corner steering gear and the corner steering gear support by bolt connection.

[0012] Preferably, the two first connecting parts are provided with a gap, which can further reduce the overall weight of the angle steering support, improve the lightweight degree, and on the other hand, the part of the hole on the angle steering can be directly connected with the vehicle frame longitudinal beam through the bolt passing through the square gap, improve the installation stability of the angle steering, and reduce the load of the angle steering support, to assist the lightweight design of the angle steering support.

[0013] Preferably, the bending part is provided with a hollow structure, which can further improve the lightweight degree of the angle steering support.

[0014] Preferably, the two ends of the steering transmission shaft are connected with the angle steering and the rack and pinion steering through the universal joint, to establish the motion connection and realize the transmission of angular velocity and torque.

[0015] The utility model provides a kind of vehicle, steering wheel is connected with angle steering through steering shaft, angle steering is installed on vehicle frame longitudinal beam through angle steering support, angle steering is connected with the rack and pinion steering installed on independent suspension subframe through steering transmission shaft, the steering rack of rack and pinion steering is connected with the hub of wheel through cross tie rod, steering knuckle, driver exerts force to angle steering by steering wheel rotation, is transmitted to rack and pinion steering by steering transmission shaft, rack linear motion causes wheel to rotate, realizes steering transmission system motion.

[0016] Preferably, the first connecting part is fixedly installed on the vehicle frame longitudinal beam, the lower part of the angle steering is fixedly connected with the second connecting part, and the upper part of the angle steering is fixedly connected with the vehicle frame longitudinal beam, to improve the installation stability of the angle steering, and reduce the load of the angle steering support, to assist the lightweight design of the angle steering support.

[0017] Through the above technical scheme, the utility model has the advantages that:

[0018] 1, by the setting of angle steering, steering transmission shaft, realize the transmission between steering wheel and rack and pinion steering, adopt independent suspension matching rack and pinion steering, simplify the structure of steering transmission mechanism, rack and pinion steering is used with independent suspension, can improve the steering sensitivity of vehicle, so that driver can more accurately control the direction of vehicle in driving process;In addition, independent suspension can better absorb road vibration and impact, rack and pinion steering reduces the friction and collision between components, thereby reducing the noise in steering process, improves ride comfort.

[0019] 2. The angle steering bracket is a bent plate structure. Multiple surfaces formed by bending support each other to form a stable three-dimensional structure. When subjected to external forces, it can better disperse and resist stress, thereby improving the overall structural stability. While maintaining the same load-bearing capacity, it can significantly reduce weight, making it easier to install and use. The elongated holes allow for adjustment of the angle steering bracket within a set range, avoiding assembly mismatch problems and providing greater flexibility in installation layout.

[0020] 3. The first connecting part is fixedly installed on the longitudinal beam of the frame, the lower part of the angle steering gear is fixedly connected to the second connecting part, and the upper part of the angle steering gear is fixedly connected to the longitudinal beam of the frame. This improves the installation stability of the angle steering gear and reduces the load on the angle steering gear bracket, which facilitates the lightweight design of the auxiliary angle steering gear bracket. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram showing the usage state of the steering transmission system of a light-duty truck according to one or more embodiments of the present invention.

[0023] Figure 2 This is a structural schematic diagram of the angle steering bracket according to one or more embodiments of the present invention;

[0024] The components represented by the various reference numerals in the diagram are:

[0025] 1. Frame longitudinal beam; 2. Angle steering gear bracket; 3. Angle steering gear; 4. Steering drive shaft; 5. Rack and pinion steering gear; 6. Independent suspension; 7. Wheel; 8. First connecting part; 9. Second connecting part; 10. Bending part; 11. Long strip hole; 12. Round hole. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] Example 1

[0028] In a typical embodiment of the utility model, as shown in the figure, Figure 1 The utility model discloses a light truck steering transmission system, which comprises angle steering gear 3, steering transmission shaft 4 and rack and pinion steering gear 5 connected in sequence, wherein the angle steering gear 3 is fixedly installed on the frame longitudinal beam 1 through the angle steering gear support 2, and the rack and pinion steering gear 5 is fixedly installed on the independent suspension 6, specifically on the auxiliary frame of the independent suspension 6.

[0029] The rack and pinion steering gear 5 can be directly connected with the left and right steering tie rods, and the steering knuckle drives the wheel 7 to deflect, so that the complex components are saved.

[0030] The rack and pinion steering gear 5 comprises a steering gear and a steering rack, the steering gear is composed of two gears, namely a driving gear (also referred to as a pinion) and a driven gear (usually a rack integrated with the steering tie rod), the driving gear is supported in the housing through a bearing, one end of the driving gear is connected with the steering transmission shaft 4 to input the steering control force of the driver, and the other end of the driving gear is directly engaged with the steering rack to form a pair of transmission pairs.

[0031] In this embodiment, the corner turner 3 is fixedly installed on the frame rail 1 through the corner turner support 2, the corner turner support 2 is a bent plate structure, and is integrally made of cast steel material, and specifically as shown in Figure 2 The corner turner support 2 includes a first connecting part 8, a second connecting part 9 and a bent part 10, the first connecting part 8 is provided with two first connecting parts 8 which are oppositely arranged, the second connecting part 9 is located below the two first connecting parts 8, and the first connecting part 8 and the second connecting part 9 are fixedly connected through the bent part 10. The bent plate structure is supported by a plurality of faces formed by bending, forming a stable three-dimensional structure, which can better disperse and resist stress when subjected to external force, thereby improving the stability of the overall structure. Compared with other structural supports, the corner turner support 2 of the bent plate structure can significantly reduce the weight while maintaining the same carrying capacity, and is convenient to install and use.

[0032] A plurality of long holes 11 are formed on the first connecting part 8, and the long holes 11 are arranged transversely to be fixedly connected with the frame rail 1 through bolts. Since the steering transmission shaft 4 has a fixed length and cannot be adjusted during installation of the vehicle, there may be deviations between the actual working conditions and the design results. The hole positions on the first connecting part 8 of the corner turner support 2 are designed as long holes 11, which can adjust the corner turner support 2 within a certain range during the whole vehicle assembly process, avoiding the problem of assembly mismatch, and improving the flexibility of installation layout; a plurality of round holes 12 are formed on the second connecting part 9, and the corner turner 3 and the second connecting part 9 of the corner turner support 2 are fixedly connected together through bolt connection.

[0033] As shown in Figure 2 The two first connecting parts 8 of the corner turner support 2 are arranged with a square gap therebetween, which can further reduce the overall weight of the corner turner support 2 and improve its lightweight degree. On the other hand, part of the hole positions on the corner turner 3 can be directly connected with the frame rail 1 through the square gap by bolts, improving the installation stability of the corner turner 3 and reducing the load of the corner turner support 2 to assist the lightweight design of the corner turner support 2.

[0034] In order to further improve the lightweight degree of the corner turner support 2, a hollow structure can also be provided on the bent part 10, and the specific arrangement manner is not limited here.

[0035] As shown in Figure 1 One end of the steering transmission shaft 4 is connected with the output end of the corner turner 3 through a universal joint, and the other end of the steering transmission shaft 4 is connected with the input end of the rack and pinion steering gear 5 through a universal joint to establish a motion connection and realize the transmission of angular velocity and torque.

[0036] Embodiment 2

[0037] In a typical embodiment of the utility model, a vehicle is provided with the steering transmission system of the light truck mentioned in embodiment 1, specifically, the first connecting part 8 of the angle steering gear support 2 is fixedly connected with the side surface of the vehicle frame longitudinal beam 1 through bolts, the second connecting part 9 is fixedly connected with the lower part of the angle steering gear 3 through bolts, and the upper part of the angle steering gear 3 is fixedly connected with the vehicle frame longitudinal beam 1 through bolts.

[0038] The steering wheel is connected with the input end of the angle steering gear 3 through a steering shaft, the output end of the angle steering gear 3 is connected with the input end of the rack and pinion steering gear 5 through a steering transmission shaft 4, the rack and pinion steering gear 5 is fixedly arranged on the auxiliary frame of the independent suspension 6, the steering rack of the rack and pinion steering gear 5 is connected with the hub of the wheel 7 through a tie rod and a steering knuckle, the driver applies force to the angle steering gear 3 by rotating the steering wheel, the force is transmitted to the rack and pinion steering gear 5 through the steering transmission shaft 4, and the linear motion of the steering rack causes the wheel 7 to rotate, thereby realizing the movement of the steering transmission system.

[0039] The arrangement mode of the independent suspension and the rack and pinion steering gear can greatly simplify the structure of the steering transmission mechanism, is convenient to maintain and has low maintenance cost, the rack and pinion steering gear can be directly connected with the left and right steering tie rods and drive the wheel to deflect through the steering knuckle, the complex components are omitted, the rack and pinion steering gear has the characteristics of high steering sensitivity and can quickly respond to the steering instruction of the driver, when used in cooperation with the independent suspension, the steering sensitivity of the vehicle can be further improved, the driver can more accurately control the direction of the vehicle during driving, the independent suspension can reduce the mutual interference of the wheels during driving, thereby improving the driving stability of the vehicle, meanwhile, the precise control of the rack and pinion steering gear also helps to maintain the driving track of the vehicle and reduce the phenomena of roll and deviation; in addition, the independent suspension usually adopts soft springs and shock absorbers, can better absorb road vibration and impact, the rack and pinion steering gear reduces the friction and collision between components, thereby reducing the noise during steering and improving the ride comfort.

[0040] The above description of the disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light commercial vehicle steering transmission system comprising: The application discloses an angle steering gear (3) connected with a steering wheel, characterized in that the angle steering gear (3) is installed on a vehicle frame longitudinal beam (1) through an angle steering gear support (2), the angle steering gear (3) is connected with a rack-and-pinion steering gear (5) through a steering transmission shaft (4), and the rack-and-pinion steering gear (5) is fixedly installed on a sub-frame of an independent suspension (6).

2. A light commercial vehicle steering transmission system according to claim 1, characterised in that, The angle steering gear support (2) is a bent plate structure.

3. The light commercial vehicle steering transmission system as claimed in claim 1, wherein, The angle steering gear support (2) comprises first connecting parts (8) and a second connecting part (9), the first connecting parts (8) are two in number, the second connecting part (9) is located below the two first connecting parts (8), and the first connecting parts (8) and the second connecting part (9) are fixedly connected through a bent part (10).

4. A light commercial vehicle steering transmission system according to claim 3, characterised in that, The two first connecting parts (8) are oppositely arranged, and a plurality of long strip holes (11) are formed in the first connecting parts (8) in a transverse direction.

5. The light commercial vehicle steering transmission system as claimed in claim 3, wherein, A plurality of round holes (12) are formed in the second connecting part (9).

6. The light commercial vehicle steering transmission system as claimed in claim 3, wherein, The two first connecting parts (8) are provided with a gap.

7. The light commercial vehicle steering transmission system as claimed in claim 3, wherein, The bent part (10) is provided with a hollow structure.

8. The light commercial vehicle steering transmission system of claim 1, wherein, The steering transmission shaft (4) is connected with the angle steering gear (3) and the rack-and-pinion steering gear (5) through universal joints at two ends thereof.

9. A vehicle characterized by comprising: The light truck steering transmission system is characterized in that the steering wheel is connected with the angle steering gear (3) through a steering shaft, the angle steering gear (3) is installed on the vehicle frame longitudinal beam (1) through the angle steering gear support (2), the angle steering gear (3) is connected with the rack-and-pinion steering gear (5) installed on the sub-frame of the independent suspension (6) through the steering transmission shaft (4), and the steering rack of the rack-and-pinion steering gear (5) is connected with the hub of the wheel (7) through a tie rod and a steering knuckle.

10. The vehicle of claim 9, wherein, The first connecting parts (8) are fixedly installed on the vehicle frame longitudinal beam (1), the lower part of the angle steering gear (3) is fixedly connected with the second connecting part (9), and the upper part of the angle steering gear (3) is fixedly connected with the vehicle frame longitudinal beam (1).

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