Adjustment mechanism and front leaf spring suspension structure

Abstract

The present invention discloses an adjustment mechanism and a front leaf spring suspension structure, which belongs to the technical field of leaf spring suspension structure and solves the technical problem that the leaf spring suspension structure cannot be adjusted in height. The adjustment mechanism includes a first limiter, a second limiter, a driving member and a fixing member, the first limiter is provided with a first through hole, and the second limiter is slidably connected to the first limiter; the driving member is transmission-connected to the second limiter, and the driving member can drive the second limiter to move toward or away from the first limiter, so that the first limiter and the second limiter clamp the leaf spring together; the fixing member is passed through the positioning hole and the first through hole; a front leaf spring suspension structure includes a leaf spring and an adjustment mechanism, the leaf spring is provided with at least one positioning hole, and the adjustment mechanism is connected to the positioning hole in the middle of the leaf spring through the fixing member. The present application enables the height of the leaf spring on the vehicle suspension to be adjusted online, and the adjustment efficiency is high. The present application enables the height of the leaf spring on the vehicle suspension to be adjusted online, and the adjustment efficiency is high.

Description

Technical Field

[0001] The present application belongs to the technical field of leaf spring suspension structures, and specifically relates to an adjustment mechanism and a front leaf spring suspension structure. Background Art

[0002] The front suspension system refers to the elastic component system connecting the frame and wheels (axles). Its main function is to transfer the force and torque between the wheels and the frame, mitigate the impact force transmitted to the frame or body by the road surface, and reduce the vibration of the frame or body.

[0003] At present, the market has strict requirements on the height of the whole vehicle. Different use environments require trucks with different whole vehicle heights. The control of the whole vehicle height of trucks of the same specification is mainly achieved by adjusting the suspension height. For example, for models matching air suspension, the change of the whole vehicle height can be controlled by the inflation and deflation of airbags. However, for mature models matching leaf springs, it is difficult to achieve the height change of the frame when the leaf spring parameters remain unchanged. That is, it is difficult to adjust the height of the whole vehicle through the suspension system for models matching leaf springs (hereinafter referred to as leaf springs). Summary of the invention

[0004] In order to solve the technical problem that it is difficult to adjust the height of the whole vehicle with the current leaf spring suspension structure, the present application provides an adjustment mechanism and a front leaf spring suspension structure.

[0005] In a first aspect of the present application, an adjustment mechanism is provided for fixing a leaf spring having a positioning hole, the adjustment mechanism comprising: a first limiting member provided with a first through hole; a second limiting member slidably connected to the first limiting member; a driving member transmission-connected to the second limiting member, the driving member being capable of driving the second limiting member to move toward or away from the first limiting member so that the first limiting member and the second limiting member jointly clamp the leaf spring; and a fixing member passing through the positioning hole and the first through hole.

[0006] In some embodiments, the driving member can drive the second limiting member to move toward or away from the first limiting member along a straight line.

[0007] In some embodiments, the first limiting member is provided with a first limiting groove, the first through hole is provided at the bottom of the first limiting groove, the second limiting member is in the first limiting groove, and the driving member can drive the second limiting member to move toward or away from the bottom of the first limiting member.

[0008] In some embodiments, the driving member is disposed on an outer wall of the first limiting member, and an output end of the driving member is connected to the second limiting member via a connecting member.

[0009] In some embodiments, the adjustment mechanism includes two driving members, and the two driving members are arranged opposite to each other on two sides of the first limiting member.

[0010] In some embodiments, the second limiting member includes two limiting plates, the two limiting plates are located in the same plane, the output ends of the two driving members are respectively connected to one of the limiting plates, and the two driving members drive the corresponding limiting plates to move synchronously.

[0011] In some embodiments, the driving member includes a bracket, a gear and a rack meshing with the gear, the bracket is fixedly disposed on the outer wall of the first limiting member, the gear is rotatably disposed on the bracket, the rack is slidably disposed on the bracket, one end of the rack is connected to the connecting member, and the gear rotates clockwise and counterclockwise to drive the second limiting member to move toward or away from the first limiting member in a straight line direction.

[0012] In a second aspect of the present application, a front leaf spring suspension structure is provided, comprising a leaf spring and the adjusting mechanism, wherein the leaf spring is provided with at least one positioning hole, and the adjusting mechanism is connected to the positioning hole via a fixing member.

[0013] In some embodiments, the leaf spring is provided with at least two positioning holes along its length direction, and the suspension structure further includes an auxiliary adjustment mechanism, and at least one of the auxiliary adjustment structures is connected to the positioning holes via a fixing member.

[0014] In some embodiments, the auxiliary adjustment mechanism includes a third limit member and a fourth limit member, the third limit member is provided with a second limit groove, and the bottom of the second limit groove is provided with a second through hole matching the positioning hole; the fourth limit member includes a slider and a limit rod, the slider is slidably arranged on the outer wall of the third limit member along the first direction, the middle part of the limit rod is hinged to the slider, one end of the limit rod is connected to the slider through a compression spring, and the other end of the limit rod is located in the second limit groove or on one side of the second limit groove, so that the limit rod and the bottom of the second limit groove jointly clamp the leaf spring; wherein, when the compression spring is in a natural state, the axis of the limit rod is perpendicular to the first direction.

[0015] The adjustment mechanism provided according to multiple embodiments of the present application can be arranged on the existing leaf spring. On the one hand, the adjustment mechanism plays a role of fixing the leaf spring. On the other hand, the driving member of the adjustment mechanism can drive the second limit member to move toward or away from the first limit member to reduce or increase the gap between the first limit member and the second limit member, thereby quickly and accurately adjusting the height of the leaf spring, thereby achieving online adjustment of the height of the leaf spring and improving the efficiency of height adjustment of the vehicle installed with the leaf spring. The front leaf spring suspension structure provided in multiple embodiments of the present application achieves online adjustment of the height of the front leaf spring suspension structure without changing the overall structure of the leaf spring suspension structure, has high adjustment efficiency, and can be directly applied to existing vehicle suspensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the adjustment mechanism in one or more embodiments of the present application is shown.

[0017] Figure 2 Shows Figure 1 A schematic structural diagram of a second limiting member and a driving member.

[0018] Figure 3 Shows Figure 2 A schematic diagram of the structure from another perspective.

[0019] Figure 4 A schematic structural diagram of a front leaf spring suspension structure in one or more embodiments of the present application is shown.

[0020] Figure 5 Shows Figure 4 A schematic diagram of the structure from another perspective.

[0021] Figure 6 Shows Figure 4 Schematic diagram of the structure of the auxiliary adjustment mechanism.

[0022] Figure 7 Shows Figure 6 Schematic diagram of the structure of the slider.

[0023] Figure 8 Shows Figure 6 Schematic diagram of the limit plate and pressure plate structure.

[0024] Explanation of the accompanying drawings: 100-leaf spring, 200-adjusting mechanism, 210-first limiting member, 211-first limiting groove, 212-first through hole, 220-second limiting member, 221-limiting plate, 230-driving member, 231-bracket, 232-gear, 233-rack, 234-belt, 235-handle, 240-connecting member, 241-first connecting rod, 242-second connecting rod, 243-third connecting rod, 300-auxiliary adjusting mechanism, 310-third limiting member, 311-second limiting groove, 312-second through hole, 313-first limiting structure, 320-fourth limiting member, 321-slider, 322-limiting rod, 323-compression spring, 324-pressure plate, 325-sleeve, 326-rotating shaft, 327-second limiting structure. DETAILED DESCRIPTION

[0025] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The vehicle suspension provided with leaf springs is widely used as a mature design. The leaf springs on the vehicle suspension include multiple layers of spring leaves, which are fixed together by clamps to form a leaf spring. For leaf springs of the same specification, the size of the clamps matches the leaf springs, which are difficult to disassemble. If the height of the leaf spring is to be adjusted on the basis of the existing vehicle suspension, an auxiliary device must be used when removing the clamps to keep the leaf spring at a certain height until a new clamp is installed on the leaf spring, so as to improve the success rate of adjusting the height of the leaf spring. This makes it difficult to adjust the height of the entire vehicle through the existing suspension system, and correspondingly, the adjustment efficiency is also low.

[0027] Figure 1 A schematic diagram of the structure of the adjustment mechanism in one or more embodiments of the present application is shown. Figure 2 Shows Figure 1 A schematic structural diagram of a second limiting member and a driving member. Figure 3 Shows Figure 2 A schematic diagram of the structure from another perspective. Figure 4 A schematic structural diagram of a front leaf spring suspension structure in one or more embodiments of the present application is shown. Figure 5 Shows Figure 4 A schematic diagram of the structure from another perspective. Figure 6 Shows Figure 4 Schematic diagram of the structure of the auxiliary adjustment mechanism. Figure 7 Shows Figure 6 Schematic diagram of the structure of the slider. Figure 8 Shows Figure 6 The present application is described below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figure 1-Figure 3 In a first aspect of the present application, an embodiment provides an adjustment mechanism 200 for fixing a leaf spring 100 having a positioning hole and adjusting the bending height of the leaf spring 100 on the vehicle suspension. The adjustment mechanism 200 includes a first limit member 210, a second limit member 220 and a driving member 230. The second limit member 220 is slidably connected to the first limit member 210, that is, the second limit member 220 does not separate from the first limit member 210. The driving member 230 is transmission-connected to the second limit member 220. The driving member 230 can drive the second limit member 220 to move toward or away from the first limit member 210. The leaf spring 100 is arranged between the first limit member 210 and the second limit member 220. The driving member 230 can drive the second limit member 220 to move so that the first limit member 210 and the second limit member 220 clamp the leaf spring 100 together. When the driving member 230 drives the second limit member 220 to move in different directions, the size of the gap between the first limit member 210 and the second limit member 220 can be changed. At this time, under the influence of its own properties, the bending height of the leaf spring 100 also changes with the change of the size of the gap between the first limit member 210 and the second limit member 220.

[0029] The first limit member 210 is provided with a first through hole 212. When the driving member 230 makes the gap between the first limit member 210 and the second limit member 220 meet the requirements, the first limit member 210 is locked on the leaf spring 100 by passing the fixing member through the positioning hole and the first through hole 212, thereby completing the adjustment of the bending height of the leaf spring 100, with high adjustment efficiency and high adjustment accuracy, and realizing the online adjustment of the height of the leaf spring, thereby improving the efficiency of the height adjustment of the vehicle equipped with the leaf spring.

[0030] When only one adjustment mechanism 200 is provided on the leaf spring 100, only one positioning hole may be provided on the leaf spring 100, and the positioning hole is located in the middle of the leaf spring 100, and the two sides of the leaf spring 100 may be connected by a clamp, a spring clamp or a clamp bolt.

[0031] In some embodiments, one end of the first limiting member 210 and the second limiting member 220 are hinged, and the driving member 230 drives the second limiting member 220 to rotate around the hinge to adjust the gap between the first limiting member 210 and the second limiting member 220.

[0032] In some embodiments, the driving member 230 can drive the second limiting member 220 to move in a straight line direction toward or away from the first limiting member 210 to adapt to the direction of height change of the leaf spring 100, so that the direction of height change of the leaf spring 100 is the first direction, and the direction in which the driving member 230 drives the second limiting member 220 is also the first direction.

[0033] Reference Figure 1 The first limiting member 210 is provided with a first limiting groove 211, which is a through groove, that is, the first limiting groove 211 has only two opposite groove walls, so as to facilitate the placement of the leaf spring 100 in the first limiting groove 211, wherein the groove width of the first limiting groove 211 is equal to the width of the leaf spring 100, so as to improve the limiting effect of the first limiting groove 211 on the leaf spring 100. The groove bottom of the first limiting groove 211 is provided with a first through hole 212 matching the positioning hole, so that after the adjustment mechanism 200 completes the adjustment of the bending height of the leaf spring 100, the leaf spring 100 and the adjustment mechanism 200 are connected and fixed by a fixing member, so as to maintain the bending height of the leaf spring 100 at the adjusted bending height, and the fixing member is a bolt, and the bolt is connected with a nut after passing through the first through hole 212 and the positioning hole.

[0034] The second stopper 220 is slidably disposed in the first stopper groove 211, and the driving member 230 is connected to the second stopper 220, driving the second stopper 220 to reciprocate along the first direction so that the bottom of the first stopper groove 211 and the second stopper 220 jointly clamp the leaf spring 100, wherein the first direction is parallel to the axial direction of the positioning hole. It should be noted that the parallel or vertical referred to in this application is not absolutely parallel or vertical, and the angle error is less than 5°. During use, the leaf spring 100 is placed in the first stopper groove 211, and the overlapping direction of the leaf spring 100 is parallel to the first direction, and the overlapping direction of the leaf spring 100 is the height direction of the leaf spring 100. The driving member 230 drives the second limiting member 220 to move back and forth, which can quickly and accurately adjust the height of the leaf spring 100, and then adjust the height of the vehicle type installed with the leaf spring 100. After the adjustment is completed, bolts and nuts are provided, and the bolts are inserted into the positioning holes and the first through holes 212. The bolts are then tightened so that the leaf spring 100 can maintain the current height, thereby achieving online adjustment of the height of the leaf spring 100, with high adjustment efficiency and low adjustment difficulty. Of course, the second limiting member 220 is provided with a through hole or gap for the bolts to pass through.

[0035] In some embodiments, the driving member 230 is arranged on the outer wall of the first limiting member 210, and the output end of the driving member 230 is connected to the second limiting member 220 through the connecting member 240. By placing the driving member 230 outside, the depth of the first limiting groove 211 is shortened, thereby avoiding the length of the first limiting member 210 being too long and affecting the layout of other structures of the vehicle body chassis.

[0036] Reference Figure 1 and Figure 3 The connecting member 240 includes a first connecting rod 241, a second connecting rod 242 and a third connecting rod 243 which are connected in sequence. The end of the first connecting rod 241 is connected to the output end of the driving member 230, and the end of the third connecting rod 243 is connected to the second limiting member 220. The groove wall of the first limiting member 210 is located between the first connecting rod 241 and the third connecting rod 243. It can be understood that the first connecting member 240 and the third connecting member 240 are parallel or approximately parallel, so that the connecting member 240 is U-shaped. At this time, the driving member 230 is located on the side of the first limiting member 210 close to the positioning hole. When the leaf spring 100 is installed on the frame, the position of the driving member 230 is located on the side of the leaf spring 100, which will not affect the installation and use of the leaf spring 100.

[0037] Considering that the connecting member 240 is not a linear structure, Figure 1-Figure 3 In some embodiments, the adjustment mechanism 200 includes two driving members 230, and the two driving members 230 are relatively arranged on both sides of the first limiting member 210. Each driving member 230 is connected to a connecting member 240, and the third connecting rods 243 of the two connecting members 240 are fixedly connected to the second limiting member 220. The second limiting member 220 is driven to reciprocate in the first limiting groove 211 by the two connecting members 240, thereby reducing the uneven force on the second limiting member 220, and correspondingly reducing the uneven force generated by the leaf spring 100 on the connecting member 240, thereby improving the service life of the middle adjustment structure, and at the same time, the second limiting member 220 has high stability when moving.

[0038] The second limiting member 220 includes two limiting plates 221, and the two limiting plates 221 are arranged along a second direction, the second direction is perpendicular to the first direction, and the side surfaces of the two limiting plates 221 are located in the same plane, so that the two limiting plates 221 and the bottom of the first limiting groove 211 can stably clamp the leaf spring 100; and the gap between the two limiting plates 221 is larger than the size of the screw head of the bolt, so that the screw head of the bolt can contact the leaf spring 100, and the output ends of the two driving members 230 are respectively connected to a limiting plate 221 to drive a limiting plate 221 to move respectively. Of course, the two driving members 230 drive the corresponding limiting plates 221 to move synchronously to improve the stability when adjusting the overall height of the leaf spring 100.

[0039] In some embodiments, the driving member 230 can be a hydraulic device, and the end of the telescopic rod of the hydraulic device is connected to the connecting member 240. The telescopic rod can drive the connecting member 240 to move when it is extended and retracted, thereby driving the second limiting member 220 to move in the first limiting groove 211. The hydraulic device has high stability, but considering that the adjustment mechanism 200 is always set on the frame with the leaf spring 100, therefore, in some embodiments, the driving member 230 includes a bracket 231, a gear 232 and a rack 233 meshing with the gear 232. The second limiting member 220 is driven by the mutual cooperation of the gear 232 and the rack 233. Figure 1 Specifically, the bracket 231 is fixedly disposed on the outer wall of the first stopper 210, and the gear 232 is rotatably disposed on the bracket 231, and the axis of the gear 232 is perpendicular to the first direction. The rack 233 is slidably disposed on the bracket 231, and one end of the rack 233 is connected to the connecting member 240, wherein the gear 232 drives the second stopper 220 to reciprocate along the first direction by clockwise and counterclockwise rotation. The gear 232 is connected to a handle 235, and the gear 232 can be driven to rotate by rotating the handle 235, which is convenient to adjust and low in cost. In some embodiments, the lever arm of the handle 235 can be increased so that when the height of the leaf spring 100 is lowered, it is less difficult for the operator to turn the handle 235. At the same time, considering the possibility that the handle 235 with a long lever arm may affect other structures on the frame, in some embodiments, a protrusion is provided at one end of the handle 235, and the protrusion is not cylindrical. The end face of the gear 232 is provided with a groove matching the protrusion. The handle 235 and the gear 232 are detachably connected by the snap-fitting cooperation between the groove and the protrusion. When the height of the leaf spring 100 needs to be adjusted, the handle 235 is installed on the gear 232 to drive the gear 232 to rotate. At the same time, the adjustment mechanisms 200 of multiple leaf springs 100 on the frame can use the same handle 235 to adjust the height of the leaf spring 100.

[0040] In some embodiments, in order to improve the stability of the movement of the rack 233, the rack 233 can be directly set on the first connecting rod 241 of the connecting member 240, and a first slide groove is set on the outer wall of the first limiting member 210, the length direction of the first slide groove is parallel to the first direction, the first connecting rod 241 is slidably set in the first slide groove, and the side of the rack 233 with teeth faces away from the bottom of the first slide groove. The rack 233 is limited by the first slide groove to improve the stability of the movement of the rack 233. In order to ensure that the two driving members 230 can synchronously drive the corresponding connecting members 240 to move, in some embodiments, the gears 232 of the two driving members 230 are connected by a belt 234, and the handle 235 drives one gear 232 to rotate to drive the two connecting members 240 to move synchronously, and the adjustment efficiency is high.

[0041] In some embodiments, a scale can be set on the gear 232 or the rack 233, and the scale on the scale matches the moving distance of the human limit member, so that the operator can quickly understand the distance moved by the second limit member 220 in the first limit groove 211, thereby improving the accuracy of height adjustment of the leaf spring 100.

[0042] See also Figure 4-8 According to a second aspect of the present application, there is provided a height-adjustable front leaf spring suspension structure, the front leaf spring suspension structure comprising a leaf spring 100, an auxiliary adjustment mechanism 300 and the adjustment mechanism 200 in the above-mentioned embodiment, the leaf spring 100 is provided with at least one positioning hole, the adjustment mechanism 200 is connected to the positioning hole in the middle of the leaf spring 100 through a fixing member, and considering that the overall length of the leaf spring 100 is relatively long, when adjusting the height of the leaf spring 100, the height of the leaf spring 100 at both ends of the length direction of the leaf spring 100 also changes accordingly, thus, three positioning holes may be provided on the leaf spring 100, and each positioning hole is matched with an adjustment mechanism 200.

[0043] However, considering that the space of the vehicle body suspension is limited, it is necessary to reduce the height of the leaf spring 100 on both sides while ensuring that the height of the leaf spring 100 on both sides can be adjusted. Figure 4 The front leaf spring suspension structure also includes at least an auxiliary adjustment mechanism 300, and the adjustment mechanism 200 and the auxiliary adjustment mechanism 300 are arranged at intervals, wherein the adjustment mechanism 200 is used to adjust the height of the middle part of the leaf spring 100, and the auxiliary adjustment mechanism 300 is used to adjust the height of both sides of the leaf spring 100. In some embodiments, the front leaf spring suspension structure includes an even number of auxiliary adjustment mechanisms 300, and two auxiliary adjustment mechanisms 300 form a pair, and the two auxiliary adjustment mechanisms 300 of each pair are respectively arranged on both sides of the adjustment mechanism 200, so as to restrict the middle and both sides of the leaf spring 100, improve the safety during the adjustment process, realize the online adjustment of the height of the front leaf spring suspension structure, have high adjustment efficiency, and can be directly applied to the existing vehicle suspension, without the need to design an additional vehicle suspension structure, which can save a lot of research and development costs.

[0044] Reference Figure 4 and Figure 5 , the adjustment mechanism 200 is arranged in the middle of the leaf spring 100, and the leaf spring 100 is a symmetrical structure, so each pair of auxiliary adjustment mechanisms 300 is also symmetrical compared to the adjustment mechanism 200, and the two sides of the leaf spring 100 are limited by an even number of auxiliary adjustment mechanisms 300, so that the height of the two sides of the leaf spring 100 can be adapted to the height of the middle of the leaf spring 100 before or after adjustment. In some embodiments, two auxiliary adjustment mechanisms 300 are arranged on one leaf spring 100, which has high stability, and in the process of adjusting the height of the leaf spring 100, fewer mechanisms need to be adjusted, and the corresponding adjustment efficiency of the height of the leaf spring 100 is high.

[0045] Reference Figure 4-Figure 6 The auxiliary adjustment mechanism 300 includes a third limiting member 310 and a fourth limiting member 320. The third limiting member 310 is provided with a second limiting groove 311. The second limiting groove 311 is also a through groove, and has only two opposite groove walls. The groove bottom of the second limiting groove 311 is provided with a second through hole 312. The second through hole 312 matches the positioning hole provided on the leaf spring 100, so that the positioning hole and the second through hole 312 are connected by a fixing member.

[0046] The fourth limiting member 320 includes a slider 321 and a limiting rod 322. The slider 321 is slidably disposed on the outer wall of the third limiting member 310 along the first direction. The middle portion of the limiting rod 322 is hinged to the slider 321. One end of the limiting rod 322 is connected to the slider 321 through a compression spring 323. The other end of the limiting rod 322 is located in the second limiting groove 311 or on one side of the second limiting groove 311. When the auxiliary adjustment mechanism 300 is disposed on the leaf spring 100, the position of the slider 321 is adjusted so that the limiting rod 322 is hinged to the second limiting groove 311 in the first direction at a spacing equal to the target thickness of the side of the leaf spring 100. Then, the slider 321 is locked on the outer wall of the third limiting member 310. At this time, the limiting rod 322 and the bottom of the second limiting groove 311 cooperate to clamp the leaf spring 100. The end where the limiting rod 322 is connected to the compression spring 323 is the first end, and the other end is the second end. When the second end is against the leaf spring 100, the compression spring 323 provides a buffer zone for the distance between the second end of the limiting rod 322 and the bottom of the second limiting groove 311. It can be understood that when the height of the leaf spring 100 is adjusted by the adjustment mechanism 200, the height of the leaf spring 100 at the position of the auxiliary adjustment mechanism 300 can change with the change of the bending height of the middle part of the leaf spring 100. The operator does not need to operate the adjustment mechanism 200 and the auxiliary adjustment mechanism 300 at the same time. In the process of adjusting the height of the leaf spring 100, the overall change of the leaf spring 100 is adaptive, and the leaf spring 100 is not easy to be damaged. Correspondingly, the safety during the adjustment process is also high.

[0047] Reference Figure 6 In some embodiments, a fourth limiting member 320 is disposed on opposite side walls of the third limiting member 310, and the limiting rods 322 of the two fourth limiting members 320 are disposed opposite to each other to cooperate with the third limiting groove to clamp the leaf spring 100. In some embodiments, the distance between the two limiting rods 322 is greater than the diameter of the second through hole 312 to avoid affecting the fixing member from locking the auxiliary adjustment mechanism 300 on the leaf spring 100.

[0048] The surface of the outer wall of the slider 321 slidably set on the third limit member 310 has a width and a length. The length direction of the surface is parallel to the first direction, and the width direction of the surface is perpendicular to the first direction. In some embodiments, the limit rod 322 can be hinged to the side wall of the slider 321 in the width direction, that is, at this time the limit rod 322 is located on the outside of the third limit member 310 in the width direction. After the leaf spring 100 is set in the third limit groove, the limit rod 322 and the bottom surface of the third limit groove jointly clamp the leaf spring 100.

[0049] Reference Figure 6-Figure 8 The outer wall of the third limiting member 310 is provided with at least one first limiting structure 313 along the first direction, and the slider 321 is provided with a second limiting structure 327 corresponding to the first limiting structure 313. The first limiting structure 313 and the second limiting structure 327 are slidably matched so that the slider 321 can stably slide on the outer wall of the third limiting member 310, wherein the first limiting structure 313 can be a slide groove, and the second limiting structure 327 can be a convex ridge used to match the slide groove.

[0050] The opposite side wall of the slider 321 is also provided with at least one screw hole, and a bolt matching the screw hole is provided. After the bolt is threadedly connected with the screw hole, the bolt passes through the screw hole and abuts against the outer wall of the third limiting member 310, so that the slider 321 can be locked on the third limiting member 310.

[0051] Reference Figure 6 In some embodiments, a strip through hole is provided on the side wall of the second limiting groove 311 along the first direction. During the movement of the slider 321, the limiting rod 322 is also slidably set in the strip through hole. At this time, the limiting rod 322 is hinged to the side wall of the slider 321 in the length direction. When the compression spring 323 is in a natural state, the axis of the limiting rod 322 is perpendicular to the first direction. The limiting rod 322 and the bottom of the second limiting groove 311 jointly clamp the leaf spring 100. The strip through hole can limit the limiting rod 322 to avoid shaking of the limiting rod 322 during use, thereby improving the stability of the auxiliary adjustment mechanism 300 during use.

[0052] When the cam 324 is in the unlock state, the locking cam 322 is in the unlock state, and the locking cam 322 is in the unlock state, so that the locking cam 322 is locked. The compression height of the compression spring 323 is limited, that is, the compression spring 323 limits the angle at which the limiting rod 322 can rotate, so that the buffer zone provided by the auxiliary adjustment mechanism 300 to the leaf spring 100 is limited and adjustable.

[0053] Considering that the pressure plate 324 and the slider 321 are hinged, when the limiting rod 322 is tilted relative to the vertical direction, the compression spring 323 will be subjected to non-vertical pressure. Therefore, in some embodiments, a limiting column is sleeved inside the compression spring 323, and the height of the limiting column is less than the height of the compression spring 323 in the natural state, wherein the height of the limiting column can be set according to different specifications of the leaf spring 100. The limiting column can be welded to the top surface of the slider 321 or to the bottom surface of the pressure plate 324. When the compression spring 323 is in the natural state, the unwelded end of the limiting column does not contact other structures. Of course, in some embodiments, the diameter of the limiting column can be slightly smaller than the inner diameter of the compression spring 323. Even if the limiting column is not fixedly connected to the top surface of the slider 321 or the bottom surface of the pressure plate 324, the compression spring 323 can be limited.

[0054] Reference Figure 7 and Figure 8 A rotating shaft 326 is provided on the slider 321, and the axial direction of the rotating shaft 326 is parallel to the outer wall of the third limit member 310 and perpendicular to the first direction. A sleeve 325 is provided at the bottom end of the pressure plate 324, and the sleeve 325 is sleeved on the rotating shaft 326. The rotating shaft 326 and the sleeve 325 are rotatably matched, so that the pressure plate 324 is hinged to the slider 321.

[0055] When the auxiliary adjustment mechanism 300 and the adjustment mechanism 200 are both arranged on the leaf spring 100, the opening directions of the second limiting groove 311 of the auxiliary adjustment mechanism 300 and the first limiting groove 211 of the adjustment mechanism 200 are consistent or opposite. When the opening directions of the first limiting groove 211 and the second limiting groove 311 are the same, it is convenient for the operator to adjust the height of the leaf spring 100. When the opening directions of the first limiting groove 211 and the second limiting groove 311 are opposite, the stability of the leaf spring 100 clamped by the adjustment mechanism 200 and the auxiliary adjustment mechanism 300 is higher; refer to Figure 4 and Figure 5 In the front leaf spring suspension structure, ears are provided at both ends of the leaf spring 100. When the front leaf spring suspension structure is set on the vehicle suspension through the two ears, the opening directions of the first limiting groove 211 and the second limiting groove 311 are both facing upward. At this time, the driving member 230 of the adjustment mechanism 200 and the slider 321 of the auxiliary adjustment mechanism 300 are both located on the side close to the ground, which is convenient for the operator to adjust.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An adjustment mechanism, characterized in that: Used to fix a leaf spring having a positioning hole, the adjustment mechanism comprises: The first limiting member is provided with a first through hole, the first limiting member is provided with a first limiting groove, and the first through hole is provided at the bottom of the first limiting groove, A second limiting member, wherein the second limiting member is disposed in the first limiting groove, the second limiting member is slidably connected to the first limiting member, and the second limiting member comprises two limiting plates, and the two limiting plates are located in the same plane; a driving member, which is transmission-connected with the second limiting member, the driving member is arranged on the outer wall of the first limiting member, the output end of the driving member is connected with the second limiting member through a connecting member, and the driving member can drive the second limiting member to move toward or away from the first limiting member, wherein the adjusting mechanism comprises two driving members, the two driving members are relatively arranged on both sides of the first limiting member, the output ends of the two driving members are respectively connected with one limiting plate, the two driving members drive the corresponding limiting plates to move synchronously, and the driving member can drive the second limiting member to move toward or away from the first limiting member, so that the first limiting member and the second limiting member clamp the leaf spring together; A fixing member is inserted through the positioning hole and the first through hole.

2. The adjustment mechanism according to claim 1, characterized in that: The driving member can drive the second limiting member to move toward or away from the first limiting member along a straight line.

3. The adjustment mechanism according to claim 1, characterized in that: The driving member includes a bracket, a gear and a rack meshing with the gear, the bracket is fixedly arranged on the outer wall of the first limiting member, the gear is rotatably arranged on the bracket, the rack is slidably arranged on the bracket, one end of the rack is connected to the connecting member, and the gear is rotated clockwise and counterclockwise to drive the second limiting member to move toward or away from the first limiting member in a straight line direction.

4. A front leaf spring suspension structure, characterized in that: It comprises a leaf spring and the adjusting mechanism as claimed in any one of claims 1 to 3, wherein the leaf spring is provided with at least one positioning hole, and the adjusting mechanism is connected to the positioning hole via a fixing member.

5. The front leaf spring suspension structure according to claim 4, characterized in that: The leaf spring is provided with at least two positioning holes along its length direction, and the suspension structure further comprises an auxiliary adjustment mechanism, at least one of the auxiliary adjustment structures is connected to the positioning holes via a fixing member.

6. The front leaf spring suspension structure according to claim 5, characterized in that: The auxiliary adjustment mechanism comprises a third limiting member and a fourth limiting member, the third limiting member is provided with a second limiting groove, and the bottom of the second limiting groove is provided with a second through hole matching the positioning hole; The fourth limiting member includes a slider and a limiting rod, the slider is slidably arranged on the outer wall of the third limiting member along the first direction, the middle part of the limiting rod is hinged to the slider, one end of the limiting rod is connected to the slider through a compression spring, and the other end of the limiting rod is located in the second limiting groove or on one side of the second limiting groove, so that the limiting rod and the bottom of the second limiting groove jointly clamp the leaf spring; wherein, when the compression spring is in a natural state, the axis of the limiting rod is perpendicular to the first direction, wherein the first direction is the direction of height change of the leaf spring.

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