A mechanical high-profile suspension system using a leaf spring and ratchet structure

Abstract

The present invention relates to a mechanical high-profile suspension system using a leaf spring and a ratchet structure, comprising: two ratchet adjustment mechanisms, two leaf springs, a connecting rod, and an auxiliary tension spring; wherein the two ratchet adjustment mechanisms are respectively installed on the suspension seat frame, the square tenon on the ratchet adjustment mechanism is fixedly connected to one end of the leaf spring, and the rotation or locking of the leaf spring is controlled by the ratchet adjustment mechanism; a connecting shaft is installed at the other end of the two leaf springs, one end of the connecting rod is installed on the connecting shaft, and the other end is hinged on the suspension seat frame, and the leaf spring is compressed by the connecting rod to produce deformation, thereby realizing the suspension function of the seat; one end of the auxiliary tension spring is connected to the lower connecting plate of the suspension seat frame, and the other end is connected to the lower transverse tube of the scissor bracket in the suspension seat frame, and the automatic upward adjustment function of the seat is realized by the auxiliary tension spring. The high-profile suspension system effectively solves the problem of cumbersome operation process and poor driving comfort of the high-profile suspension system in the existing mechanical suspension seat.

Description

Technical Field

[0001] The invention belongs to the field of suspension seats, and in particular relates to a mechanical high-profile suspension system utilizing a leaf spring and a ratchet structure. Background Art

[0002] With the development of my country's automobile and transportation industries, the demand for trucks has increased year by year, and people's requirements for truck seats have also become higher and higher. Since truck seats have relatively harsh working conditions and high fatigue strength requirements, the selection of elastic elements for truck mechanical suspension seats during the design and use process is extremely important. The selection of elastic elements will directly affect the fatigue strength of the seat and the future driver's driving experience. Among the current market products, the high-profile suspension system used in truck suspension seats mainly uses tension springs and preload adjustment mechanisms to achieve height adjustment. However, this structural adjustment method has the following problems:

[0003] (1) The tension spring and preload adjustment mechanism take up a lot of space. Drivers of different weights need to adjust the preload adjustment mechanism multiple times when adjusting the seat height. The adjustment process is cumbersome, requires a lot of operating force, and takes a long time to adjust.

[0004] (2) It is difficult for the driver to adjust a reasonable preload by feel, resulting in poor driving comfort. Summary of the invention

[0005] The purpose of the present invention is to provide a mechanical high-profile suspension system using a leaf spring and a ratchet structure to solve the technical problems of the mechanical high-profile suspension system in the existing suspension seat, which has complicated operation process, cannot quickly adjust a reasonable suspension amount, and has poor driving comfort.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] A mechanical high-profile suspension system utilizing a leaf spring and a ratchet structure, comprising: two ratchet adjustment mechanisms, two leaf springs, a connecting rod, and an auxiliary tension spring installed at the bottom of a suspension seat frame; wherein the two ratchet adjustment mechanisms are respectively installed on the suspension seat frame, and the square tenon on each of the ratchet adjustment mechanisms is respectively fixedly connected to one end of the leaf spring, and the rotation or locking of the leaf spring is controlled by the ratchet adjustment mechanism; a connecting shaft is installed at the other end of the two leaf springs, one end of the connecting rod is installed on the connecting shaft, and the other end is hinged to the suspension seat frame, and the leaf spring is compressed by the connecting rod to produce deformation, thereby realizing the suspension function of the seat; one end of the auxiliary tension spring is connected to the lower connecting plate of the suspension seat frame, and the other end is connected to the lower cross tube of the scissors bracket in the suspension seat frame, and the tensile force of the auxiliary tension spring causes the lower cross tube on the scissors bracket to move closer to the middle, thereby realizing the automatic upward adjustment function of the seat.

[0008] As a preferred embodiment of the present invention, the two leaf springs have different stiffnesses, and the two leaf springs can be replaced by carbon fiber material plates, because carbon fiber has the advantages of light weight, good high temperature resistance and corrosion resistance, good resilience, etc., which makes the suspension seat lighter, more durable and has better shock absorption effect.

[0009] As a further preferred embodiment of the present invention, the ratchet adjustment mechanism includes a cavity, a ratchet arranged in the cavity and fixedly connected to the square tenon on one side, two pawls installed in the cavity and arranged below the ratchet and meshing with the ratchet teeth of the ratchet, a handle arranged outside the cavity for controlling the rotation or locking of the ratchet, a cam arranged between the two pawls and coaxially connected to the handle, and a cover covering the cavity; wherein two semicircular mounting grooves are processed at the positions where the two pawls are installed in the cavity, and the two pawls are respectively installed in the semicircular mounting grooves so that the upper part of the pawl can swing left and right relative to the mounting groove; a return spring is installed between each of the pawls and the cavity, and the two pawls are meshed with the ratchet teeth of the ratchet through the return spring, so that the ratchet is locked in both directions (clockwise and counterclockwise) and cannot rotate; the handle can rotate relative to the cavity, the cam is coaxially connected to the handle, and rotates with the rotation of the handle, and when the handle is rotated to bring the cam to a horizontal position, the cam squeezes the two pawls so that the two pawls are separated from the ratchet teeth on the ratchet, and the ratchet realizes free rotation in both directions, which is convenient for adjusting the seat height.

[0010] Working principle: Under the action of the auxiliary spring, the seat of the present invention can realize the automatic upward adjustment function. When the driver needs to adjust the seat height and suspension amount, the ratchet adjustment mechanism is used to control the rotation or locking of the leaf spring; when the ratchet adjustment mechanism switch is turned on, the corresponding leaf spring can rotate along the center of the ratchet. At this time, the leaf spring does not generate resistance, and the height of the seat can be adjusted at will; when the ratchet adjustment switch is turned off, the corresponding leaf spring is in a locked state, and the height of the seat is locked. At this time, the leaf spring is compressed by the connecting rod to cause elastic deformation, generate resistance, and realize the suspension function of the seat; the mechanical high-profile suspension system adopts two sets of ratchet adjustment mechanisms to adjust the leaf springs of different stiffness respectively, so that when the seat height is adjusted, it can combine 3 suspension functions with resistance in different ranges, thereby meeting the needs of drivers of different weights.

[0011] Advantages and positive effects of the present invention:

[0012] (1) The high-profile suspension system provided by the present invention utilizes a leaf spring and a ratchet adjustment mechanism to replace a tension spring and a preload adjustment mechanism. Through different combinations of leaf springs, a reasonable suspension amount is provided for drivers of different weight ranges, thereby improving driving comfort and effectively solving the problems existing in the background technology.

[0013] (2) When the high-profile suspension system provided by the present invention adjusts the seat height, the seat automatically adjusts upward through an auxiliary tension spring, and then the seat height is adjusted by rotating the outer handle of the ratchet adjustment mechanism. The operation force is small and the time is short, which improves the convenience of operation. In addition, the overall structure of the mechanical high-profile suspension system is simple, the installation is compact, and it is lighter, which can greatly reduce the manufacturing cost.

[0014] (3) The mechanical high-profile suspension system provided by the present invention can meet the needs of drivers with a wider range of weights and is suitable for all car seats that require suspension and vibration reduction, thus having a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the high-profile suspension system of the present invention.

[0016] Figure 2 It is a side view of the high-profile suspension system of the present invention after being cut apart along the longitudinal direction.

[0017] Figure 3 It is a top view of the high-profile suspension system of the present invention after being cut apart along the longitudinal direction.

[0018] Figure 4 It is a schematic structural diagram of the ratchet adjustment mechanism of the present invention in a ratchet locked state.

[0019] Figure 5 It is a schematic diagram of the structure of the ratchet adjustment mechanism of the present invention when the ratchet is in a rotating state.

[0020] Figure 6 It is a side view of the ratchet adjustment mechanism of the present invention.

[0021] Figure numerals: suspended seat frame 1; leaf spring 2; ratchet adjustment mechanism 3; connecting rod 4; auxiliary tension spring 5, lower connecting plate 11, lower cross tube 12, upper connecting plate 13, connecting shaft 21, square tenon 31, cavity 32, ratchet 33, pawl 34, cam 35, handle 36, return spring 37, cover body 38. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art clearly understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings, but it should not be regarded as limiting the protection scope of the present invention.

[0023] See also Figures 1 to 3The mechanical high-profile suspension system using a leaf spring and a ratchet structure provided by the present invention comprises: two ratchet adjustment mechanisms 3, two leaf springs 2, a connecting rod 4, and an auxiliary tension spring 5; wherein the two ratchet adjustment mechanisms 3 are respectively mounted on the lower connecting plate 11 of the suspension seat frame 1, and the square tenon on each of the ratchet adjustment mechanisms 3 is respectively fixedly connected to one end of the leaf spring 2, and the rotation or locking of the leaf spring 2 is controlled by the ratchet adjustment mechanism 3; a connecting shaft 21 is mounted on the other end of the two leaf springs 2, and one end of the connecting rod 4 is mounted on the connecting shaft 21, and the other end is hinged on the upper connecting plate 13 of the suspension seat frame 1. The leaf spring 2 is compressed by the connecting rod 4 to produce deformation, thereby realizing the suspension function of the seat; the stiffness of the two leaf springs 2 is different, and the two leaf springs 2 can be replaced by carbon fiber material plates; the auxiliary tension spring 5 is installed at the bottom of the suspension seat frame 1, one end of the auxiliary tension spring 5 is connected to the lower connecting plate 11 of the suspension seat frame, and the other end is connected to the lower cross tube 12 of the scissors bracket in the suspension seat frame. The tensile force of the auxiliary tension spring 5 is used to realize the automatic upward adjustment function of the seat.

[0024] See also Figures 4 to 6 The ratchet adjustment mechanism 3 includes a cavity 32, a ratchet 33 disposed in the cavity and fixedly connected to the square tenon 31 on one side, two pawls 34 installed in the cavity and disposed below the ratchet and meshing with the ratchet teeth of the ratchet, a handle 36 disposed outside the cavity for controlling the rotation or locking of the ratchet, a cam 35 disposed between the two pawls and coaxially connected to the handle, and a cover 38 covering the cavity; wherein two semicircular mounting grooves (not marked) are processed at the positions where the two pawls are installed in the cavity, and the two pawls are respectively installed in the semicircular mounting grooves, The upper part of the pawl can swing left and right relative to the mounting groove; a return spring 37 is installed between each of the pawls and the cavity, and the two pawls are engaged with the ratchet teeth of the ratchet wheel through the return spring 37, so that the ratchet wheel 33 is locked in both directions (clockwise and counterclockwise) and cannot rotate; the handle 36 can rotate relative to the cavity, and the cam 35 is coaxially connected to the handle 36 and rotates with the rotation of the handle. When the handle is rotated to the horizontal position, the cam squeezes the two pawls, so that the two pawls 34 are separated from the ratchet teeth on the ratchet wheel 33, and the ratchet wheel can achieve free rotation in both directions.

Claims

1. A mechanical high-profile suspension system using a leaf spring and a ratchet structure, characterized in that: include: Two ratchet adjustment mechanisms, two leaf springs, a connecting rod, and an auxiliary tension spring installed at the bottom of a suspension seat frame; wherein the two ratchet adjustment mechanisms are respectively installed on the suspension seat frame, and the square tenon on each of the ratchet adjustment mechanisms is respectively fixedly connected to one end of the leaf spring, and the rotation or locking of the leaf spring is controlled by the ratchet adjustment mechanism; a connecting shaft is installed at the other end of the two leaf springs, one end of the connecting rod is installed on the connecting shaft, and the other end is hinged on the suspension seat frame, and the leaf spring is compressed by the connecting rod to produce deformation, thereby realizing the suspension function of the seat; one end of the auxiliary tension spring is connected to the lower connecting plate of the suspension seat frame, and the other end is connected to the lower cross tube of the scissor bracket in the suspension seat frame, and the automatic upward adjustment function of the seat is realized by the auxiliary tension spring; The two leaf springs have different stiffnesses, and the two leaf springs are replaced by carbon fiber material plates; The ratchet adjustment mechanism comprises: a cavity, a ratchet wheel arranged in the cavity and fixedly connected to a square tenon on one side, two ratchet pawls installed in the cavity and arranged below the ratchet wheel and meshing with the ratchet teeth of the ratchet wheel, a handle arranged outside the cavity for controlling the rotation or locking of the ratchet wheel, a cam arranged between the two ratchet pawls and coaxially connected to the handle, and a cover covering the cavity; Two semicircular mounting grooves are processed at the positions where the two pawls are installed in the cavity, and the two pawls are respectively installed in the semicircular mounting grooves so that the upper part of the pawl can swing left and right relative to the mounting groove; a return spring is installed between each of the pawls and the cavity, and the two pawls are engaged with the ratchet teeth of the ratchet wheel through the return spring, so that the ratchet wheel is bidirectionally locked and cannot rotate; the handle can rotate relative to the cavity, and the cam is coaxially connected to the handle and rotates with the handle. When the handle is rotated to the horizontal position, the cam squeezes the two pawls to separate the two pawls from the ratchet teeth on the ratchet wheel, and the ratchet wheel can achieve bidirectional free rotation, which is convenient for height adjustment.

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