Cab front suspension structure and vehicle

Abstract

The application discloses a cab front suspension structure and a vehicle, wherein the cab front suspension structure comprises a stabilizer bar assembly and two groups of front suspension components symmetrically arranged at two ends of the stabilizer bar assembly; the front suspension component comprises an upper bracket, a shock absorber assembly, a swing arm assembly and a rotary connection structure; one end of the upper bracket is connected with the stabilizer bar assembly, and the other end is used for being connected with a cab; one end of the shock absorber assembly is connected with the stabilizer bar assembly, and the other end is connected with a shock absorber lower support which is used for being connected with a chassis of the vehicle; one end of the swing arm assembly is connected with the stabilizer bar assembly, and the other end is connected with a swing arm lower support which is used for being connected with the chassis of the vehicle; one end of the rotary connection structure is rotatably connected with the swing arm assembly, and the other end is used for being rotatably connected with the chassis of the vehicle. The technical scheme improves the use safety of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle chassis, in particular to a cab front suspension structure and a vehicle. BACKGROUND

[0002] The cab front suspension structure connects the cab and the frame together, and is used for buffering the impact of the power assembly, road bumps and collisions on the cab.

[0003] At present, one end of the swing arm lower support in the front suspension structure is used for being connected with the cab, and the other end is used for being connected with the frame. In order to meet the requirements of industry standards and regulations, the swing arm lower support is usually designed to have relatively large strength.

[0004] However, when the vehicle collides, the vehicle speed is usually high, and the collision energy received by the cab is much larger than the requirement of the regulations. At this time, due to the large strength and rigidity of the swing arm lower support, the swing arm lower support may directly break and fail, so that the cab and the frame are separated, which seriously threatens the personal safety of the driver and passengers. SUMMARY

[0005] The main purpose of the present application is to provide a cab front suspension structure, which aims to improve the use safety of the vehicle.

[0006] In order to achieve the above purpose, the cab front suspension structure provided by the present application comprises a stabilizer bar assembly and two groups of front suspension components symmetrically arranged at both ends of the stabilizer bar assembly.

[0007] The front suspension component comprises:

[0008] an upper bracket, one end of which is connected with the stabilizer bar assembly, and the other end is used for being connected with the cab;

[0009] a shock absorber assembly, one end of which is connected with the stabilizer bar assembly, and the other end is connected with a shock absorber lower support, which is used for being connected with the chassis of the vehicle;

[0010] a swing arm assembly, one end of which is connected with the stabilizer bar assembly, and the other end is connected with a swing arm lower support, which is used for being connected with the chassis of the vehicle; and

[0011] a rotary connection structure, one end of which is rotatably connected with the swing arm assembly, and the other end is used for being rotatably connected with the chassis of the vehicle.

[0012] Optionally, the rotary connection structure is arranged on the outer side of the swing arm lower support.

[0013] Optionally, the upper end and the lower end of the swing arm lower support are respectively provided with a first mounting hole and a second mounting hole, and the upper end and the lower end of the swing arm lower support are connected with the swing arm assembly and the chassis through the first mounting hole and the second mounting hole.

[0014] Optionally, the rotating connection structure comprises a connecting rod and two pins, the upper end and the lower end of the connecting rod are respectively provided with a first connecting hole and a second connecting hole, one of the pins passes through the first connecting hole and the first mounting hole, and the other pin passes through the second connecting hole and the second mounting hole, so as to connect the connecting rod, the swing arm lower support and the swing arm assembly together, and to fixedly connect the pins and the swing arm lower support and rotatably connect the pins and the connecting rod.

[0015] Optionally, the pin comprises a fixed part, a rotating part and a shoulder part connecting the fixed part and the rotating part, the radial dimension of the shoulder part is greater than that of the fixed part and the rotating part, the fixed part passes through the first mounting hole or the second mounting hole to fixedly connect the swing arm lower support and the swing arm assembly, and the rotating part passes through the first connecting hole or the second connecting hole to rotatably connect the connecting rod and the swing arm lower support.

[0016] Optionally, the rotating connection structure further comprises a limiting piece, and the limiting piece abuts against one side of the connecting rod away from the swing arm lower support.

[0017] Optionally, the limiting piece comprises a limiting pin and a limiting hole, the limiting hole is arranged at one end of the rotating part away from the fixed part, and the limiting pin is arranged in the limiting hole to abut against one side of the connecting rod away from the swing arm lower support.

[0018] Optionally, a gasket is further arranged between the limiting pin and the connecting rod.

[0019] Optionally, a guide crack hole is arranged on the swing arm lower support.

[0020] The application further provides a vehicle comprising the cab front suspension structure.

[0021] One of the technical solutions of the present application is to set a rotating connection structure in the cab front suspension structure, and make one end of the rotating connection structure rotatably connected with the swing arm assembly, and the other end rotatably connected with the chassis of the vehicle. In this way, when the vehicle collides, the shock absorber assembly in the cab front suspension structure first breaks; then under the action of the collision force, the swing arm lower support also breaks. After the swing arm lower support breaks, the rotating connection structure drives the cab to rotate backward through the swing arm assembly and the upper bracket, realizing the rear movement of the cab within a controllable range, thereby reducing the stress of the cab in the collision, and the front suspension structure further absorbs the collision energy in the process of moving backward, thereby improving the energy absorption ratio of the cab front suspension structure in the collision process, avoiding the deformation of the cab due to bearing too much energy, and further striving for a larger survival space for the driver and passengers in the cab. At the same time, after the swing arm lower support breaks, the cab and the chassis can be effectively connected through the upper bracket, the swing arm assembly and the rotating connection structure, thereby avoiding the separation between the cab and the vehicle chassis, ensuring the personal safety of the driver and passengers, and improving the use safety of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on the structure shown in the drawings.

[0023] Figure 1 The structure schematic diagram of the cab front suspension structure of the present application before and after collision, wherein the dashed line represents after collision;

[0024] Figure 2 The cooperation structure schematic diagram of the swing arm assembly, the swing arm lower support and the rotating connection structure in the cab front suspension structure; Figure 1

[0025] Figure 3 The explosion structure schematic diagram. Figure 2

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027]

[0028]

[0029] The implementation of the present application, functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] ​​With reference to the accompanying drawings: clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0031] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three solutions, for example, A and / or B, including A technical solution, B technical solution, and A and B technical solution; in addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skill in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0033] The front suspension structure connects the cab and the frame together, and is used to buffer the impact of the power assembly, road bumps and collisions on the cab.

[0034] At present, one end of the shock absorber in the front suspension structure is used to connect with the cab, and the other end is used to connect with the frame. At the same time, one end of the swing arm lower support in the front suspension structure is used to connect with the cab, and the other end is used to connect with the frame. Industry standards require that the cab and the frame should remain connected after the vehicle collision test. Usually after the collision test, the shock absorber will first break. In order to meet the requirements of industry standards and regulations, the swing arm lower support is usually designed to have relatively large strength.

[0035] However, when the vehicle collides, the speed is usually high, and the collision energy received by the cab is much larger than the requirement of the regulations. At this time, due to the large strength and rigidity of the swing arm lower support, the front suspension structure cannot effectively absorb the collision energy when colliding, the cab deforms severely, and even the swing arm lower support may directly break and fail, thereby separating the cab and the frame, which seriously threatens the personal safety of the driver and passengers.

[0036] In view of this, the application provides a cab front suspension structure 10.

[0037] Please refer to Figures 1 to 3 Among them Figure 1 The structure diagram of an embodiment of the cab front suspension structure before and after the collision is shown, in which the solid line represents before the collision, and the dashed line represents after the collision. Only the rotary connection structure and the swing arm assembly are shown after the collision, and the upper bracket after the swing arm assembly moves backward is not shown, and the lower bracket of the swing arm after the collision is also not shown.

[0038] In the embodiment of the application, the cab front suspension structure 10 comprises a stabilizer bar assembly 11 and two groups of front suspension assemblies 12 symmetrically arranged at both ends of the stabilizer bar assembly 11. The two groups of front suspension assemblies 12 are arranged at the left front and right front of the vehicle respectively, and the stabilizer bar assembly 11 connects the two groups of front suspension assemblies 12 together to form the cab front suspension structure 10 to provide collision buffering for the cab.

[0039] The front suspension assembly 12 comprises an upper bracket 100, a shock absorber assembly 200, a swing arm assembly 400 and a rotary connection structure 600. One end of the upper bracket 100 is connected with the stabilizer bar assembly 11, and the other end is connected with the cab. The upper bracket 100 and the stabilizer bar assembly 11 are used to resist the lateral force during the driving of the vehicle, that is, to resist the roll. One end of the shock absorber assembly 200 is connected with the stabilizer bar assembly 11, and the other end is connected with the shock absorber lower bracket 300, which is connected with the chassis 20 of the vehicle. The shock absorber assembly 200 is used to resist the vertical force during the driving of the vehicle. In an embodiment, the shock absorber lower bracket 300 is fixedly connected with the chassis 20 by bolts. One end of the swing arm assembly 400 is connected with the stabilizer bar assembly 11, and the other end is connected with the swing arm lower bracket 500, which is connected with the chassis 20 of the vehicle. In an embodiment, a bushing is embedded in the end of the swing arm assembly 400 and the swing arm lower bracket 500. The comfort bushing is pressed into the end of the swing arm assembly 400 and the swing arm lower bracket 500 to adjust the matching position between the swing arm assembly 400 and the swing arm lower bracket 500. By optimizing the comfort bushing, its structure is designed to be anisotropic, so that each stiffness meets the needs of the vehicle, to improve the smoothness of the vehicle, and thus improve the riding comfort of the passengers. The end of the swing arm lower bracket 500 away from the swing arm assembly 400 is fixedly connected with the chassis 20 of the vehicle by bolts.

[0040] In an embodiment, the shock absorber assembly 200, the upper bracket 100 and the swing arm assembly 400 are sleeved on the stabilizer bar assembly 11, and are arranged in sequence from one end of the stabilizer bar to the middle of the stabilizer bar, so as to realize the fixed connection of the three with the stabilizer bar assembly 11. In an embodiment, the connecting ends of the shock absorber assembly 200 and the upper bracket 100 with the stabilizer bar assembly 11 are embedded with bushings. Specifically, the comfort bushings are press-fitted at the connecting ends of the shock absorber assembly 200 and the stabilizer bar assembly 11 and the connecting ends of the upper bracket 100 and the stabilizer bar assembly 11, for adjusting the matching position between the shock absorber assembly 200, the upper bracket 100 and the stabilizer bar assembly 11. By optimizing the comfort bushings, the structure thereof is designed to be anisotropic, so that the stiffness thereof meets the requirements of the vehicle, so as to improve the smoothness of the whole vehicle, and further improve the riding comfort of the passengers.

[0041] One end of the rotary connection structure 600 is rotatably connected with the swing arm assembly 400, and the other end is used for rotatably connecting with the chassis 20 of the vehicle. Specifically, one end of the rotary connection structure 600 is rotatably connected with the end of the swing arm assembly 400 away from the stabilizer bar assembly 11, and the other end of the rotary connection structure 600 is rotatably connected with the chassis 20 of the vehicle. For the convenience of description, the end of the rotary connection structure 600 connected with the swing arm assembly 400 is defined as the upper end, and the end of the rotary connection structure 600 connected with the chassis 20 is defined as the lower end. Under the force condition, the lower end of the rotary connection structure 600 can rotate relative to the chassis 20, and the upper end of the rotary connection structure 600 can drive the swing arm assembly 400 to move.

[0042] Please refer to Figure 1When the vehicle collides, the shock absorber assembly 200 in the cab front suspension structure 10 first breaks, at which time the connection between the cab and the chassis 20 through the upper bracket 100, the shock absorber assembly 200, and the shock absorber lower bracket 300 is invalid; then under the action of the collision force, the swing arm lower bracket 500 also breaks, at which time the connection between the cab and the chassis 20 through the upper bracket 100, the stabilizer bar assembly 11, the swing arm assembly 400, and the swing arm lower bracket 500 is invalid. After the swing arm lower bracket 500 breaks, the rotary connection structure 600 drives the cab to rotate backward through the swing arm assembly 400 and the upper bracket 100, realizing the rearward movement of the cab within a controllable range, thereby reducing the stress on the cab in the collision, and the front suspension structure further absorbs the collision energy in the process of moving backward, thereby improving the energy absorption ratio of the cab front suspension structure 10 in the collision process, avoiding the deformation of the cab due to bearing too much energy, and further striving for a larger survival space for the driver and passengers in the cab. At the same time, after the swing arm lower bracket 500 breaks, the cab and the chassis 20 can be effectively connected through the upper bracket 100, the swing arm assembly 400, and the rotary connection structure 600, thereby avoiding the separation between the cab and the chassis 20, ensuring the personal safety of the driver and passengers, and improving the use safety of the vehicle.

[0043] One technical solution of the present application sets up the rotary connection structure 600 in the cab front suspension structure 10, and makes one end of the rotary connection structure 600 rotatably connected with the swing arm assembly 400 and the other end rotatably connected with the chassis 20 of the vehicle. In this way, when the vehicle collides, the shock absorber assembly 200 in the cab front suspension structure 10 first breaks; then under the action of the collision force, the swing arm lower bracket 500 also breaks. After the swing arm lower bracket 500 breaks, the rotary connection structure 600 drives the cab to rotate backward through the swing arm assembly 400 and the upper bracket 100, realizing the rearward movement of the cab within a controllable range, thereby reducing the stress on the cab in the collision, and the front suspension structure further absorbs the collision energy in the process of moving backward, thereby improving the energy absorption ratio of the cab front suspension structure 10 in the collision process, avoiding the deformation of the cab due to bearing too much energy, and further striving for a larger survival space for the driver and passengers in the cab. At the same time, after the swing arm lower bracket 500 breaks, the cab and the chassis 20 can be effectively connected through the upper bracket 100, the swing arm assembly 400, and the rotary connection structure 600, thereby avoiding the separation between the cab and the chassis 20, ensuring the personal safety of the driver and passengers, and improving the use safety of the vehicle.

[0044] Further, the rotating connection structure 600 is arranged on the outer side of the swing arm lower support 500. Specifically, in the scheme shown in the drawings of the present application, the rotating connection structure 600 is arranged on the outer side of the swing arm lower support 500. That is, along the width direction of the vehicle, the rotating connection structure 600 is arranged on the side of the swing arm lower support 500 facing the outside of the vehicle. Compared with arranging the rotating connection structure 600 on the inner side of the swing arm lower support 500, interference between the rotating connection structure 600 and other components in the cab front suspension structure 10 or other components of the vehicle body is avoided, and the effectiveness and stability of the rotating connection structure 600 in connecting the cab and the chassis 20 are ensured. In the two sets of front suspension assemblies 12 in the cab front suspension structure 10, the rotating connection structure 600 is arranged on the outer side of the swing arm lower support 500 respectively, so that the balance of the connection between the cab and the chassis 20 by the two rotating connection structures 600 is ensured. After the vehicle is involved in a collision, the two rotating connection structures 600 arranged on the outer side of the two swing arm lower supports 500 respectively ensure the stability and reliability of the rear movement of the cab.

[0045] Please refer to Figure 1 and Figure 3 Further, the upper end and the lower end of the swing arm lower support 500 are respectively provided with a first mounting hole 510 and a second mounting hole 520, and the upper and lower ends of the swing arm lower support 500 are connected with the swing arm assembly 400 and the chassis 20 through the first mounting hole 510 and the second mounting hole 520 respectively; and the two ends of the rotating connection structure 600 are rotatably connected with the swing arm assembly 400 and the chassis 20 through the first mounting hole 510 and the second mounting hole 520 respectively.

[0046] Specifically, the swing arm lower support 500 has a certain height, and a first mounting hole 510 is formed in the upper end of the swing arm lower support 500, and the upper end of the swing arm lower support 500 is connected with the swing arm assembly 400 through the first mounting hole 510. A second mounting hole 520 is formed in the lower end of the swing arm lower support 500, and the lower end of the swing arm lower support 500 is fixedly connected with the chassis 20 through the second mounting hole 520. In an embodiment, the swing arm lower support 500 includes oppositely arranged inner and outer support plates, and the swing arm assembly 400 is clamped between the inner and outer support plates. The upper end of each of the inner and outer support plates is provided with the first mounting hole 510, and a connecting member passes through the first mounting hole 510 to realize the connection between the swing arm lower support 500 and the swing arm assembly 400. Here, the number, size and shape of the first mounting hole 510 are not limited. The lower end of each of the inner and outer support plates is provided with the second mounting hole 520, and a connecting member passes through the second mounting hole 520 to realize the connection between the swing arm lower support 500 and the chassis 20. Here, the number, size and shape of the second mounting hole 520 are not limited. In the scheme shown in the drawings of the present application, the rotary connection structure 600 has a certain height, and the upper end of the rotary connection structure 600 is also rotatably connected with the swing arm assembly 400 through the first mounting hole 510, and the lower end of the rotary connection structure 600 is rotatably connected with the chassis 20 through the second mounting hole 520. In this way, compared with the additional connection device of the rotary connection structure 600, the rotary connection structure 600 in the present application realizes the connection between the two ends of the rotary connection structure 600 and the swing arm assembly 400 and the chassis 20 respectively through the first mounting hole 510 and the second mounting hole 520 formed in the swing arm lower support 500, thereby avoiding the setting of the additional connection device, being conducive to the lightweight of the front suspension assembly 12, being conducive to the lightweight of the cab front suspension structure 10, and also being conducive to the cost reduction of the cab front suspension structure 10; at the same time, the overall structure of the cab front suspension structure 10 is also simpler, which facilitates the installation and disassembly of the cab front suspension structure 10 and improves the disassembly efficiency of the cab front suspension structure 10.

[0047] Please refer to Figure 2 and Figure 3 , further, the rotary connection structure 600 includes a connecting rod 610 and two pin shafts 620, the upper and lower ends of the connecting rod 610 are respectively provided with a first connecting hole 611 and a second connecting hole 612, one pin shaft 620 passes through the first connecting hole 611 and the first mounting hole 510, and the other pin shaft 620 passes through the second connecting hole 612 and the second mounting hole 520, so as to connect the connecting rod 610, the swing arm lower support 500 and the swing arm assembly 400 together, and fixedly connect the pin shaft 620 and the swing arm lower support 500, and rotatably connect the pin shaft 620 and the connecting rod 610.

[0048] Specifically, the rotating connecting structure 600 comprises a connecting rod 610 and two pin shafts 620. The connecting rod 610 has a certain height. The upper end of the connecting rod 610 is provided with a first connecting hole 611, and the position of the first connecting hole 611 corresponds to the position of the first mounting hole 510. The lower end of the connecting rod 610 is provided with a second connecting hole 612, and the position of the second connecting hole 612 corresponds to the position of the second mounting hole 520. For the convenience of description, the two pin shafts 620 are defined as an upper pin shaft 620 and a lower pin shaft 620. The upper pin shaft 620 passes through the first connecting hole 611 on the connecting rod 610, the first mounting hole 510 on the outer support plate, the swing arm assembly 400, and the first mounting hole 510 on the inner support plate, thereby connecting the upper end of the connecting rod 610, the upper end of the swing arm lower support 500, and the swing arm assembly 400 together. The lower pin shaft 620 passes through the second connecting hole 612 on the connecting rod 610, the second mounting hole 520 on the outer support plate, the chassis 20, and the second mounting hole 520 on the inner support plate, thereby connecting the lower end of the connecting rod 610, the lower end of the swing arm lower support 500, and the chassis 20 together. At the same time, the pin shaft 620 is fixedly connected between the swing arm lower support 500, that is, the swing arm lower support 500 and the swing arm assembly 400 are fixedly connected through the pin shaft 620. The pin shaft 620 is rotatably connected with the connecting rod 610, that is, the connecting rod 610 can be rotatably connected with the chassis 20 and the swing arm assembly 400. In this way, through the cooperation of the connecting rod 610 and the pin shaft 620, the fixed connection between the swing arm lower support 500 and the swing arm assembly 400 and the chassis 20 and the rotating connection between the rotating connecting structure 600 and the swing arm assembly 400 and the chassis 20 are simultaneously realized, which is beneficial to the simplification of the cab front suspension structure 10.

[0049] Of course, in an embodiment, the rotating connecting structure 600 can also be a flexible member, such as a rope with a certain toughness. The two ends of the flexible member are respectively connected with the swing arm assembly 400 and the chassis 20. When the vehicle collides, under the connection of the flexible member, the effective connection between the cab and the chassis 20 can still be maintained.

[0050] Please refer to Figure 3 Further, the pin shaft 620 comprises a fixed part 621, a rotating part 622, and a shoulder part 623 connecting the fixed part 621 and the rotating part 622. The radial dimension of the shoulder part 623 is greater than that of the fixed part 621 and the rotating part 622. The fixed part 621 passes through the first mounting hole 510 or the second mounting hole 520 to fixedly connect the swing arm lower support 500 and the swing arm assembly 400. The rotating part 622 passes through the first connecting hole 611 or the second connecting hole 612 to rotatably connect the connecting rod 610 and the swing arm lower support 500.

[0051] Specifically, the pin 620 includes a rotating portion 622, a shoulder portion 623, and a fixing portion 621 along its axial direction. In the embodiment shown in the figures of this invention, the cross-sectional shape of the pin 620 is circular, wherein the radial dimension of the shoulder portion 623 is larger than that of the fixing portion 621 and the rotating portion 622. When the connecting rod 610, the lower support of the swing arm 500, and the swing arm assembly 400 / chassis 20 are connected, the fixing portion 621 of the pin 620 passes through the first mounting hole 510 / second mounting hole 520 on the lower support of the swing arm 500. The portion of the fixing portion 621 that extends out of the first mounting hole 510 / second mounting hole 520 is fixed by bolts, thereby realizing the fixed connection between the lower support of the swing arm 500 and the swing arm assembly 400. The first connecting hole 611 / second connecting hole 612 of the connecting rod 610 is clearance-fitted with the rotating part 622 of the pin 620, forming a rotating pair between the connecting rod 610 and the rotating part 622 of the pin 620, thus realizing the rotational connection between the connecting rod 610 and the rocker arm assembly 400 and the chassis 20. The shoulder 623 of the pin 620 is clamped between the lower support of the rocker arm 500 and the connecting rod 610. The radial dimension of the shoulder 623 is larger than that of the fixed part 621 and the rotating part 622, providing precise guidance for the installation between the connecting rod 610 and the lower support of the rocker arm 500. This improves the installation efficiency between the pin 620 and the connecting rod 610 and the lower support of the rocker arm 500, and also facilitates the precise positioning between the pin 620 and the connecting rod 610 and the lower support of the rocker arm 500. Of course, in one embodiment, the pin 620 may also include only a rotating part 622 and a fixed part 621, wherein the radial dimension of the rotating part 622 is greater than the radial dimension of the fixed part 621. In this way, a fixed connection between the lower support 500 of the swing arm and the swing arm assembly 400 / chassis 20, and a rotatable connection between the connecting rod 610 and the swing arm assembly 400 / chassis 20 can also be realized.

[0052] Furthermore, the rotating connection structure 600 also includes a limiting member, which abuts against the side of the connecting rod 610 away from the lower support of the swing arm 500. Specifically, the rotating connection structure 600 also includes a limiting member, which abuts against the side of the connecting rod 610 away from the lower support of the swing arm 500. Thus, when the connecting rod 610 is connected to the outside of the lower support of the swing arm 500 via the pin 620, the limiting member restricts the movement of the connecting rod 610 along the axial direction of the pin 620, preventing the connecting rod 610 from wobbling in the axial direction of the pin 620, so that the connecting rod 610 only rotates in the circumferential direction of the pin 620, ensuring the rotation effect of the connecting rod 610 and ensuring the connection effect between the cab front suspension structure 10 and the cab and chassis 20.

[0053] Please refer to Figure 3Furthermore, the limiting component includes a limiting pin 631 and a limiting hole 624. The limiting hole 624 is located at the end of the rotating part 622 away from the fixed part 621. The limiting pin 631 passes through the limiting hole 624 to abut against the side of the connecting rod 610 away from the lower support 500 of the swing arm.

[0054] Specifically, in the embodiment shown in the figures of this invention, the limiting member includes a limiting pin 631 and a limiting hole 624. The limiting hole 624 is provided on the end of the rotating part 622 of the pin shaft 620 away from the fixed part 621. After the connecting rod 610 passes through the pin shaft 620, the limiting hole 624 on the pin shaft 620 is exposed from the end face of the connecting rod 610 away from the lower support 500 of the swing arm. In one embodiment, the limiting hole 624 passes through the radial direction of the pin 620, and the limiting pin 631 passes through the limiting hole 624, so that the limiting pin 631 abuts against the side of the connecting rod 610 away from the lower support 500 of the swing arm, thereby limiting the connecting rod 610 in the axial direction of the pin 620, restricting the movement of the connecting rod 610 in the axial direction of the pin 620, avoiding the shaking of the connecting rod 610 in the axial direction of the pin 620, so that the connecting rod 610 only rotates in the circumferential direction of the pin 620, ensuring the rotation effect of the connecting rod 610, and ensuring the connection effect between the cab front suspension structure 10 and the cab and chassis 20. Of course, in one embodiment, the limiting member includes a limiting groove and a limiting block. A limiting groove is provided on the rotating part 622 of the pin 620. When the connecting rod 610 passes through the pin 620, the limiting groove on the pin 620 is exposed from the end of the connecting rod 610 away from the lower support of the swing arm 500. The limiting block is inserted into the limiting groove, so that the limiting block abuts against the side of the connecting rod 610 away from the lower support of the swing arm 500, thereby limiting the connecting rod 610 in the axial direction of the pin 620.

[0055] Please refer to Figure 3 Furthermore, a washer 632 is provided between the limiting pin 631 and the connecting rod 610. Specifically, in the embodiment shown in the figures of this invention, a washer 632 is provided between the limiting pin 631 and the connecting rod 610. The washer 632 is sleeved on one end of the pin 620 that protrudes from the connecting rod 610 and abuts against the end of the connecting rod 610 away from the lower support 500 of the swing arm. The limiting pin 631 abuts against the end of the washer 632 away from the connecting rod 610. Thus, the provision of the washer 632 allows the washer 632 to abut against the connecting rod 610 in the entire circumferential direction, increasing the abutment area between the washer 632 and the connecting rod 610, further improving the limiting effect on the connecting rod 610 in the axial direction of the pin 620, and further preventing the connecting rod 610 from wobbling in the axial direction of the pin 620.

[0056] Please refer to Figure 3Furthermore, a guide hole 530 is provided on the lower control arm bracket 500. Specifically, the lower control arm bracket 500 also has a guide hole 530, so that when a vehicle collision occurs, the shock absorber assembly 200 in the front suspension structure 10 of the cab will break first. After the shock absorber assembly 200 breaks, the lower control arm bracket 500 will begin to break. The guide hole 530 can guide the lower control arm bracket 500 to break first at the guide hole 530. After breaking, the lower control arm bracket 500 can rotate with the connecting rod 610 and rotate rearward with the vehicle body, reducing the force on the cab and further absorbing energy during the movement. At the same time, the guide hole 530 also helps to reduce the weight of the lower control arm bracket 500 and the front suspension structure 10 of the cab. Of course, in some embodiments, a weight-reducing hole can be provided in the middle component of the lower swing arm bracket 500, and a guide hole 530 can be provided on the bracket arm of the lower swing arm bracket 500 facing the front of the vehicle to guide the breakage of the lower swing arm bracket 500. Here, the specific location, shape, and size of the guide hole 530 are not limited.

[0057] The present invention also proposes a vehicle including a front cab suspension structure 10. The specific structure of the front cab suspension structure 10 is as described in the above embodiments. Since the vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cab front suspension structure characterized by comprising: The front suspension structure comprises a stabilizer bar assembly and two groups of front suspension assemblies symmetrically arranged at two ends of the stabilizer bar assembly. The front suspension assembly comprises: an upper bracket, one end of which is connected to the stabilizer bar assembly and the other end of which is used for connecting to the cab; a shock absorber assembly, one end of which is connected to the stabilizer bar assembly and the other end of which is connected to a lower bracket of the shock absorber, the lower bracket of the shock absorber being used for connecting to the chassis of the vehicle; a swing arm assembly, one end of which is connected to the stabilizer bar assembly and the other end of which is connected to a lower bracket of the swing arm, the lower bracket of the swing arm being used for connecting to the chassis of the vehicle; and a rotary connecting structure, one end of which is rotatably connected to the swing arm assembly and the other end of which is used for rotatably connecting to the chassis of the vehicle. When the lower bracket of the swing arm is broken, the cab and the chassis are connected through the upper bracket, the swing arm assembly and the rotary connecting structure to avoid the separation between the cab and the chassis.

2. The cab forward suspension structure of claim 1, wherein The rotary connecting structure is arranged outside the lower bracket of the swing arm.

3. The cab forward suspension structure of claim 1, wherein The upper end and the lower end of the lower bracket of the swing arm are respectively provided with a first mounting hole and a second mounting hole, and the upper end and the lower end of the lower bracket of the swing arm are respectively connected to the swing arm assembly and the chassis through the first mounting hole and the second mounting hole; and the two ends of the rotary connecting structure are rotatably connected to the swing arm assembly and the chassis through the first mounting hole and the second mounting hole.

4. The cab forward suspension structure of claim 3, wherein The rotary connecting structure comprises a connecting rod and two pins, the upper end and the lower end of the connecting rod are respectively provided with a first connecting hole and a second connecting hole, one of the pins passes through the first connecting hole and the first mounting hole, and the other pin passes through the second connecting hole and the second mounting hole, so as to connect the connecting rod, the lower bracket of the swing arm and the swing arm assembly together, and to fixedly connect the pins and the lower bracket of the swing arm and rotatably connect the pins and the connecting rod.

5. The cab forward suspension structure of claim 4, wherein The pin comprises a fixed part, a rotary part and a shoulder part connecting the fixed part and the rotary part, the radial dimension of the shoulder part is greater than that of the fixed part and the rotary part, the fixed part passes through the first mounting hole or the second mounting hole to fixedly connect the lower bracket of the swing arm and the swing arm assembly, and the rotary part passes through the first connecting hole or the second connecting hole to rotatably connect the connecting rod and the lower bracket of the swing arm.

6. The cab forward suspension structure of claim 5, wherein The rotary connecting structure further comprises a limiting member, the limiting member abuts against one side of the connecting rod away from the lower bracket of the swing arm.

7. The cab forward suspension structure of claim 6, wherein The limiting member comprises a limiting pin and a limiting hole, the limiting hole is arranged at one end of the rotary part away from the fixed part, and the limiting pin is arranged in the limiting hole to abut against one side of the connecting rod away from the lower bracket of the swing arm.

8. The cab forward suspension structure of claim 7, wherein A gasket is further arranged between the limiting pin and the connecting rod.

9. The cab forward suspension structure of claim 1 wherein, The lower bracket of the swing arm is provided with a guide breaking hole.

10. A vehicle characterized by comprising: The front suspension structure comprises the cab front suspension structure according to any one of claims 1 to 9.

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