A monoleaf spring suspension system and vehicle

Abstract

The present application relates to a kind of single leaf spring suspension systems and vehicle, it includes: single leaf spring body, one end of the single leaf spring body is rotatably connected with two lugs, the first end between two the lug is rotatably connected with first support, the other end of the single leaf spring body is rotatably connected with second support, the single leaf spring body has front axle mounting point;First limiting rod, the first limiting rod is fixed in two the lug;First resistance portion, the first resistance portion is fixed to the first support, and it is located above the first limiting rod;When the single leaf spring body is located in the region fracture between the front axle mounting point and the second support, the first limiting rod with the first end of the lug as the rotating fulcrum counterclockwise rotates, and it is resisted with the first resistance portion, to prevent the lug continue to rotate.The present application improves the single leaf spring body front section of whole vehicle when breaking, the problem of poor driving safety of vehicle.

Description

Technical Field

[0001] This invention relates to the field of automotive chassis suspension, and particularly to a single-leaf spring suspension system and vehicle. Background Technology

[0002] When the single-leaf spring in a single-leaf spring suspension breaks, it must not affect vehicle safety. Regarding design considerations for vehicle safety in the event of single-leaf spring breakage, some systems employ an infinite lifespan design for the single-leaf spring itself. This is achieved by increasing the strength of the single-leaf spring material or reducing the stress on the single-leaf spring, resulting in a lifespan equal to that of the vehicle.

[0003] In related technologies, when the front section of the single-leaf spring body breaks, the broken single-leaf spring body will cause the front axle to shift, seriously affecting the driving safety of the vehicle. Summary of the Invention

[0004] This invention provides a single-leaf spring suspension system and vehicle to solve the problem in the related art where, when the front section of the single-leaf spring body breaks, the broken single-leaf spring body causes the front axle to shift, seriously affecting the driving safety of the vehicle.

[0005] In a first aspect, a single-leaf spring suspension system is provided, comprising:

[0006] A single-leaf spring body, one end of which is rotatably connected to two lugs, a first bracket is rotatably connected between the first ends of the two lugs, and the other end of which is rotatably connected to a second bracket. The single-leaf spring body has a front axle mounting point.

[0007] The first limiting rod is fixed through and to the two lifting lugs;

[0008] The first abutment is fixed to the first bracket and located above the first limiting rod;

[0009] When the single leaf spring body breaks in the area between the front axle mounting point and the second bracket, the first limiting rod rotates counterclockwise with the first end of the lug as the fulcrum and abuts against the first blocking part to prevent the lug from continuing to rotate.

[0010] In some embodiments, the first blocking part includes:

[0011] A stop plate, which is fixed to the first bracket, has an arc-shaped groove on the side of the stop plate facing the first limiting rod;

[0012] When the single leaf spring body breaks in the area between the front axle mounting point and the second bracket, and the first limiting rod moves to abut against the wall of the arc-shaped groove, the wall of the arc-shaped groove prevents the first limiting rod from moving further, thereby preventing the lug from continuing to rotate.

[0013] In some embodiments, the single-leaf spring suspension system further includes:

[0014] The second limiting rod is fixed through and to the two lifting lugs;

[0015] The second abutment is disposed on the side of the single leaf spring body facing the second limiting rod;

[0016] When the single leaf spring body breaks in the area between the front axle mounting point and the first bracket, the broken section of the single leaf spring body rotates counterclockwise with the second end of the lug as the pivot point, causing the second stop to abut against the second limit rod, thereby preventing the broken section of the single leaf spring body from continuing to rotate.

[0017] In some embodiments, the second blocking part includes:

[0018] A stop block, the stop block being fixed to the side of the single-leaf spring body facing the second limiting rod;

[0019] When the single leaf spring body breaks in the area between the front axle mounting point and the first bracket, the side wall of the stop block abuts against the second limiting rod to prevent the single leaf spring body, which has broken into a shorter segment, from continuing to rotate.

[0020] In some embodiments, the second limiting rod includes:

[0021] Two rods, one of which is fixed through and to the first lug, and the other rod is fixed through and to the second lug;

[0022] The second abutment is provided with a limiting channel for each of the rods and forms a stop block with one side of the limiting channel. The rod is located in the limiting channel. When the rod moves to abut against the stop block, the stop block prevents the single leaf spring body from continuing to rotate.

[0023] In some embodiments, the stop block is integrally formed with the single-leaf spring body.

[0024] In some embodiments, a protective plate is fixed to the bottom middle of the single-leaf spring body, and the length direction of the protective plate is consistent with the length direction of the single-leaf spring body;

[0025] When the single-leaf spring body breaks in the area between the front axle mounting point and the first bracket, and the broken-short segment of the single-leaf spring body abuts against the protective plate, it prevents the broken-short segment of the single-leaf spring body from continuing to move.

[0026] In some embodiments, the protective sheet has flanges on both opposite sides, and the spacing between the two flanges is consistent with the width direction of the protective sheet.

[0027] In some embodiments, a variable stiffness limiting block is provided above the front axle mounting point, and the variable stiffness limiting block is used to fix it to the bottom of the vehicle frame.

[0028] Secondly, a vehicle is provided that includes a single-leaf spring suspension system as described in some of the embodiments above.

[0029] The beneficial effects of the technical solution provided by this invention include: when the single-leaf spring body deforms normally and causes the hanger to rotate counterclockwise around the first bracket, the first limiting rod and the first limiting part will not interfere, ensuring the normal use of the single-leaf spring suspension system; when the front section of the single-leaf spring body breaks (i.e., the single-leaf spring body breaks between the front axle mounting point and the second bracket), causing the hanger to rotate counterclockwise, the hanger drives the first limiting rod to rotate counterclockwise and will contact the first limiting part for limiting. At this time, the hanger can no longer rotate backward, preventing the broken rear section of the single-leaf spring body from moving backward, thereby preventing the front axle from moving backward, improving the problem of poor vehicle driving safety when the front section of the single-leaf spring body breaks. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a front view structural diagram of a single-leaf spring suspension system provided in an embodiment of the present invention;

[0032] Figure 2 This is a three-dimensional structural diagram of a single-leaf spring suspension system provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the first limiting rod and the first limiting part in an unlimited state according to an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of the limiting state of the second limiting rod and the second limiting part is provided for embodiments of the present invention;

[0035] Figure 5 A three-dimensional structural schematic diagram of the first support provided in an embodiment of the present invention;

[0036] Figure 6 A three-dimensional structural diagram of the first type of blocking block provided in an embodiment of the present invention;

[0037] Figure 7 A three-dimensional structural diagram of the second type of blocking block provided in an embodiment of the present invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the protective sheet provided in an embodiment of the present invention.

[0039] In the diagram: 1. Single leaf spring body; 2. Lifting lug; 3. First bracket; 4. Second bracket; 5. First limiting rod; 6. First abutting part; 61. Abutting plate; 7. Second limiting rod; 8. Second abutting part; 81. Abutting block; 9. Limiting channel; 10. Protective plate; 11. Flanged edge; 12. Variable stiffness limiting block; 13. Frame; 14. Front axle mounting point; 15. Front axle. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention provides a single-leaf spring suspension system and vehicle to solve the problem in the related art where, when the front section of the single-leaf spring body breaks, the broken single-leaf spring body causes the front axle to shift, seriously affecting the driving safety of the vehicle.

[0042] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment of the invention provides a single-leaf spring suspension system, which may include: a single-leaf spring body 1, one end of which is rotatably connected to two lugs 2, a first bracket 3 rotatably connected between the first ends of the two lugs 2, and the other end of which is rotatably connected to a second bracket 4. The single-leaf spring body 1 has a front axle mounting point 14 (the front axle mounting point 14 may be located in the middle of the single-leaf spring body 1); a first limiting rod 5, which is fixed through the two lugs 2; and a first abutment 6, which is fixed to the first bracket 3 and located above the first limiting rod 5. When the single-leaf spring body 1 breaks in the area between the front axle mounting point 14 and the second bracket 4, the first limiting rod 5 rotates counterclockwise with the first end of the lug 2 as the fulcrum and abuts against the first abutment 6 to prevent the lug 2 from continuing to rotate.

[0043] The single leaf spring body 1 has a rotatable lug 2 at its right end, and the upper ends of the two lugs 2 are rotatably connected to the same first bracket 3. The upper end of the first bracket 3 can be fixed to the vehicle frame 13. The left end of the single leaf spring body 1 has a rotatable second bracket 4, and the upper end of the second bracket 4 can be fixed to the vehicle frame 13. The first limiting rod 5 can be fixed between the two lugs 2. The first abutment 6 can be fixed to the lower end of the first bracket 3 and located above the first limiting rod 5. The single leaf spring body 1 can be installed on the top of the front axle 15 of the vehicle through the front axle mounting point 14.

[0044] Specifically, when the normal deformation of the single-leaf spring body 1 causes the hanger 2 to rotate counterclockwise around the first bracket 3, the first limiting rod 5 and the first stop part will not interfere, ensuring the normal use of the single-leaf spring suspension system. When the front section of the single-leaf spring body 1 breaks (that is, the single-leaf spring body 1 breaks between the front axle mounting point 14 and the second bracket 4), causing the hanger 2 to rotate counterclockwise, the hanger 2 drives the first limiting rod 5 to rotate counterclockwise and will contact the first stop part for limitation. At this time, the hanger 2 can no longer rotate backward, preventing the broken rear section of the single-leaf spring body 1 from moving backward, thereby preventing the front axle 15 from moving backward, thus improving the problem of poor vehicle driving safety when the front section of the single-leaf spring body 1 breaks.

[0045] In some embodiments, such as Figure 5 As shown, the first abutting part 6 may include: abutting plate 61, the abutting plate 61 is fixed to the first bracket 3, and the abutting plate 61 has an arc-shaped groove on the side facing the first limiting rod 5; when the single leaf spring body 1 breaks in the area between the front axle mounting point 14 and the second bracket 4, and the first limiting rod 5 moves to abut against the groove wall of the arc-shaped groove, the groove wall of the arc-shaped groove prevents the first limiting rod 5 from continuing to move, so as to prevent the lifting lug 2 from continuing to rotate.

[0046] The number of baffles 61 can be two, and the two baffles 61 can be distributed at intervals along the thickness direction of the first bracket 3 (i.e., distributed at intervals along the width direction of the whole vehicle). When the single leaf spring body 1 is deformed normally, the arc groove of the baffle 61 can provide sufficient movement space for the first limiting rod 5 to ensure the normal deformation of the single leaf spring body 1, thereby ensuring the normal use of the single leaf spring suspension system. When the front section of the single leaf spring body 1 breaks, the counterclockwise rotation range of the hanger 2 exceeds the preset range, which will cause the first limiting rod 5 on it to abut against the groove wall of the arc groove, preventing the hanger 2 from continuing to rotate counterclockwise, thereby limiting the tendency of the rear section of the single leaf spring body 1 to move backward after the breakage, and thus preventing the front axle 15 from moving backward.

[0047] Of course, in some embodiments, the first abutment 6 may also be fixed to the lower right side of the first bracket 3 (i.e., Figure 3 The first blocking part 6 (located above the right of the first limiting rod 5) can be a blocking block or a blocking rod, etc.

[0048] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the single-leaf spring suspension system may further include: a second limiting rod 7, which is fixed through the two lugs 2; and a second abutment 8, which is disposed on the side of the single-leaf spring body 1 facing the second limiting rod 7. When the single-leaf spring body 1 breaks in the area between the front axle mounting point 14 and the first bracket 3, the broken section of the single-leaf spring body 1 rotates counterclockwise with the second end of the lug 2 as the pivot point, so that the second abutment 8 abuts against the second limiting rod 7, thereby preventing the broken section of the single-leaf spring body 1 from continuing to rotate.

[0049] The second limiting rod 7 can be fixed between the two lifting lugs 2, and the second abutting part 8 can be located to the lower right of the second limiting rod 7 and fixed to the right end of the single leaf spring body 1.

[0050] When the rear section of the single leaf spring body 1 breaks (i.e., when the single leaf spring body 1 breaks between the front axle mounting point 14 and the first bracket 3), the broken rear section of the single leaf spring body 1 will rotate counterclockwise with the lower end of the lug 2 as the pivot point. During the counterclockwise rotation, the second stop part 8 will stop the second limit rod 7 from continuing to rotate counterclockwise until it comes into contact with the second limit rod 7. This reduces the risk of the broken rear section of the single leaf spring body 1 contacting the ground and lifting the rear end of the vehicle.

[0051] In some embodiments, such as Figure 6As shown, the second blocking part 8 may include: a blocking block 81, the blocking block 81 being fixed to the side of the single leaf spring body 1 facing the second limiting rod 7; when the single leaf spring body 1 breaks in the area between the front axle mounting point 14 and the first bracket 3, the side wall of the blocking block 81 abuts against the second limiting rod 7 to prevent the single leaf spring body 1, which has broken into a shorter section, from continuing to rotate.

[0052] The stop block 81 can be fixed to the right end of the single leaf spring body 1 and face the second limiting rod 7, so that the single leaf spring body 1 has two thickness surfaces. The thickness of the first thickness surface is smaller than that of the second thickness surface (equivalent to opening a complete channel on the side of the single leaf spring body 1 facing the second limiting rod 7). When the single leaf spring body 1 deforms normally, the first thickness surface can ensure that the single leaf spring body 1 will not interfere with the second limiting rod 7, ensuring the normal use of the single leaf spring suspension system. When the rear section of the single leaf spring body 1 breaks, the broken rear section of the single leaf spring body 1 will rotate counterclockwise with the lower end of the hanger 2 as the pivot point. During the counterclockwise rotation, the stop block 81 will contact and abut with the second limiting rod 7 (that is, the side wall of the second thickness surface will contact and abut with the second limiting rod 7). The second limiting rod 7 will prevent the broken rear section of the single leaf spring body 1 from continuing to rotate counterclockwise, thereby reducing the risk of the broken rear section of the single leaf spring body 1 contacting the ground and lifting the rear end of the vehicle.

[0053] In some embodiments, such as Figure 7 As shown, the second limiting rod 7 includes two rods, one of which is fixed through the first lifting lug 2 and the other rod is fixed through the second lifting lug 2; the second abutment 8 is provided with a limiting channel 9 for each rod and forms an abutment block 81 with one side of the limiting channel 9. The rod is located in the limiting channel 9. When the rod moves to abut against the abutment block 81, the abutment block 81 prevents the single leaf spring body 1 from continuing to rotate.

[0054] Along the thickness direction of the single-leaf spring body 1, the abutment block 81 can be T-shaped and fixed on the side of the single-leaf spring body 1 facing the second limiting rod 7 (equivalent to having two independent limiting channels 9 in the width direction of the single-leaf spring body 1). Each rod is located in a limiting channel 9. When the single-leaf spring body 1 deforms normally, the limiting channel 9 can ensure that the single-leaf spring body 1 will not interfere with the second limiting rod 7, ensuring the normal use of the single-leaf spring suspension system. When the rear section of the single-leaf spring body 1 breaks, the broken rear section of the single-leaf spring body 1 will rotate counterclockwise with the lower end of the hanger 2 as the pivot point. During the counterclockwise rotation, the right side wall of the limiting channel 9 will contact and abut against the corresponding second limiting rod 7. The second limiting rod 7 will prevent the broken rear section of the single-leaf spring body 1 from continuing to rotate counterclockwise, thereby reducing the risk of the broken rear section of the single-leaf spring body 1 contacting the ground and lifting the rear end of the vehicle.

[0055] In some embodiments, the stop block 81 is integrally formed with the single-leaf spring body 1. This integral forming of the stop block 81 and the single-leaf spring body 1 ensures the structural strength and performance requirements of the single-leaf spring body 1. Furthermore, when the stop block 81 is T-shaped, it further guarantees the structural strength and performance requirements of the single-leaf spring body 1, reducing the degree of processing required for the single-leaf spring body 1.

[0056] In some embodiments, such as Figure 1 He 2 and Figure 8 As shown, a protective plate 10 is fixed at the bottom of the single leaf spring body 1, and the length direction of the protective plate 10 is consistent with the length direction of the single leaf spring body 1. When the single leaf spring body 1 breaks in the area between the front axle mounting point 14 and the first bracket 3, and the broken section of the single leaf spring body 1 abuts against the protective plate 10, it prevents the broken section of the single leaf spring body 1 from continuing to move.

[0057] Among them, a protective plate 10 can be installed at the bottom of the single leaf spring body 1. When the rear section of the single leaf spring body 1 breaks and the broken rear section of the single leaf spring body 1 comes into contact with the protective plate 10, the protective plate 10 can prevent the broken rear section of the single leaf spring body 1 from moving backward, thereby reducing the risk of the broken rear section of the single leaf spring body 1 coming into contact with the ground and lifting the rear end of the vehicle.

[0058] This invention implements protective measures for two scenarios of fracture in the rear section of the single-leaf spring body 1, greatly improving the reliability and safety of the single-leaf spring suspension system.

[0059] In some embodiments, such as Figure 8As shown, the protective sheet 10 has flanges 11 on both opposite sides, and the spacing between the two flanges 11 is consistent with the width direction of the protective sheet 10. The flanges 11 enhance the structural strength of the protective sheet 10 and improve the restraint between the protective sheet 10 and the broken rear section of the single-leaf spring body 1.

[0060] For example, the flange 11 can be set facing upwards or downwards (e.g., Figure 8 As shown), when the flange 11 can be set facing upwards, it can also limit the movement of the rear single leaf spring body 1 in the width direction of the whole vehicle after the breakage, further improving its safety.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, a variable stiffness limiting block 12 is provided above the front axle mounting point 14, and the variable stiffness limiting block 12 is used to fix it to the bottom of the frame 13. The characteristics of the variable stiffness limiting block 12 help to reduce the contact impact of the single leaf spring body 1, improve the ride comfort, and at the same time limit the ultimate stress of the single leaf spring body 1, ensuring the reliability of the single leaf spring body 1.

[0062] Specifically, the variable stiffness limiting block 12 can be made of an elastic material, for example, such as rubber or a spring.

[0063] Of course, in some embodiments, the variable stiffness limiting block 12 can also be fixed at the top of the middle position of the single leaf spring body 1, with the same purpose of buffering and preventing the single leaf spring from breaking due to excessive stress.

[0064] In some embodiments, the present invention provides a vehicle that includes a single-leaf spring suspension system as described in some embodiments.

[0065] Specifically, the single-leaf spring suspension system may include: a single-leaf spring body 1, one end of which is rotatably connected to two lugs 2, a first bracket 3 rotatably connected between the first ends of the two lugs 2, and the other end of the single-leaf spring body 1 rotatably connected to a second bracket 4; the single-leaf spring body 1 has a front axle mounting point 14 (the front axle mounting point 14 may be located in the middle of the single-leaf spring body 1); a first limiting rod 5, which is fixed through the two lugs 2; and a first abutment 6, which is fixed to the first bracket 3 and located above the first limiting rod 5; when the single-leaf spring body 1 breaks in the area between the front axle mounting point 14 and the second bracket 4, the first limiting rod 5 rotates counterclockwise with the first end of the lug 2 as the fulcrum and abuts against the first abutment 6 to prevent the lug 2 from continuing to rotate.

[0066] The single leaf spring body 1 has a rotatable lug 2 at its right end, and the upper ends of the two lugs 2 are rotatably connected to the same first bracket 3. The upper end of the first bracket 3 can be fixed to the vehicle frame 13. The left end of the single leaf spring body 1 has a rotatable second bracket 4, and the upper end of the second bracket 4 can be fixed to the vehicle frame 13. The first limiting rod 5 can be fixed between the two lugs 2. The first abutment 6 can be fixed to the lower end of the first bracket 3 and located above the first limiting rod 5. The single leaf spring body 1 can be installed on the top of the front axle 15 of the vehicle through the front axle mounting point 14.

[0067] Specifically, when the normal deformation of the single-leaf spring body 1 causes the hanger 2 to rotate counterclockwise around the first bracket 3, the first limiting rod 5 and the first stop part will not interfere, ensuring the normal use of the single-leaf spring suspension system. When the front section of the single-leaf spring body 1 breaks (that is, the single-leaf spring body 1 breaks between the front axle mounting point 14 and the second bracket 4), causing the hanger 2 to rotate counterclockwise, the hanger 2 drives the first limiting rod 5 to rotate counterclockwise and will contact the first stop part for limitation. At this time, the hanger 2 can no longer rotate backward, preventing the broken rear section of the single-leaf spring body 1 from moving backward, thereby preventing the front axle 15 from moving backward, thus improving the problem of poor vehicle driving safety when the front section of the single-leaf spring body 1 breaks.

[0068] In some embodiments, such as Figure 5 As shown, the first abutting part 6 may include: abutting plate 61, the abutting plate 61 is fixed to the first bracket 3, and the abutting plate 61 has an arc-shaped groove on the side facing the first limiting rod 5; when the single leaf spring body 1 breaks in the area between the front axle mounting point 14 and the second bracket 4, and when the first limiting rod 5 moves to abut against the groove wall of the arc-shaped groove, the groove wall of the arc-shaped groove prevents the first limiting rod 5 from continuing to move, so as to prevent the lifting lug 2 from continuing to rotate.

[0069] The number of baffles 61 can be two, and the two baffles 61 can be distributed at intervals along the thickness direction of the first bracket 3 (i.e., distributed at intervals along the width direction of the whole vehicle). When the single leaf spring body 1 is deformed normally, the arc groove of the baffle 61 can provide sufficient movement space for the first limiting rod 5 to ensure the normal deformation of the single leaf spring body 1, thereby ensuring the normal use of the single leaf spring suspension system. When the front section of the single leaf spring body 1 breaks, the counterclockwise rotation range of the hanger 2 exceeds the preset range, which will cause the first limiting rod 5 on it to abut against the groove wall of the arc groove, preventing the hanger 2 from continuing to rotate counterclockwise, thereby limiting the tendency of the rear section of the single leaf spring body 1 to move backward after the breakage, and thus preventing the front axle 15 from moving backward.

[0070] Of course, in some embodiments, the first abutment 6 may also be fixed to the lower right side of the first bracket 3 (i.e., Figure 3The first blocking part 6 (located above the right of the first limiting rod 5) can be a blocking block or a blocking rod, etc.

[0071] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the single-leaf spring suspension system may further include: a second limiting rod 7, which is fixed through the two lugs 2; and a second abutment 8, which is disposed on the side of the single-leaf spring body 1 facing the second limiting rod 7. When the single-leaf spring body 1 breaks in the area between the front axle mounting point 14 and the first bracket 3, the broken section of the single-leaf spring body 1 rotates counterclockwise with the second end of the lug 2 as the pivot point, so that the second abutment 8 abuts against the second limiting rod 7, thereby preventing the broken section of the single-leaf spring body 1 from continuing to rotate.

[0072] The second limiting rod 7 can be fixed between the two lifting lugs 2, and the second abutting part 8 can be located to the lower right of the second limiting rod 7 and fixed to the right end of the single leaf spring body 1.

[0073] When the rear section of the single leaf spring body 1 breaks (i.e., when the single leaf spring body 1 breaks between the front axle mounting point 14 and the first bracket 3), the broken rear section of the single leaf spring body 1 will rotate counterclockwise with the lower end of the lug 2 as the pivot point. During the counterclockwise rotation, the second stop part 8 will stop the second limit rod 7 from continuing to rotate counterclockwise until it comes into contact with the second limit rod 7. This reduces the risk of the broken rear section of the single leaf spring body 1 contacting the ground and lifting the rear end of the vehicle.

[0074] In some embodiments, such as Figure 6 As shown, the second blocking part 8 may include: a blocking block 81, the blocking block 81 being fixed to the side of the single leaf spring body 1 facing the second limiting rod 7; when the single leaf spring body 1 breaks in the area between the front axle mounting point 14 and the first bracket 3, the side wall of the blocking block 81 abuts against the second limiting rod 7 to prevent the single leaf spring body 1, which has broken into a shorter section, from continuing to rotate.

[0075] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0076] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A single-leaf spring suspension system, characterized in that, It includes: A single-leaf spring body (1) has two lugs (2) rotatably connected to one end of the single-leaf spring body (1), a first bracket (3) rotatably connected between the first ends of the two lugs (2), and a second bracket (4) rotatably connected to the other end of the single-leaf spring body (1). The single-leaf spring body (1) has a front axle mounting point (14). The first limiting rod (5) is fixed through the two lifting lugs (2); The first blocking part (6) is fixed to the first bracket (3) and located above the first limiting rod (5); When the single leaf spring body (1) breaks in the area between the front axle mounting point (14) and the second bracket (4), the first limiting rod (5) rotates counterclockwise with the first end of the lug (2) as the fulcrum and abuts against the first blocking part (6) to prevent the lug (2) from continuing to rotate. The single-leaf spring suspension system also includes: The second limiting rod (7) is fixed through the two lifting lugs (2); The second abutment (8) is disposed on the side of the single leaf spring body (1) facing the second limiting rod (7); When the single leaf spring body (1) breaks in the area between the front axle mounting point (14) and the first bracket (3), the broken single leaf spring body (1) in a shorter segment rotates counterclockwise with the second end of the lug (2) as the pivot point, so that the second stop (8) abuts against the second limit rod (7) to prevent the broken single leaf spring body (1) in a shorter segment from continuing to rotate; The second blocking part (8) includes: A stop block (81) is fixed to the side of the single leaf spring body (1) facing the second limiting rod (7); When the single leaf spring body (1) breaks in the area between the front axle mounting point (14) and the first bracket (3), the side wall of the stop block (81) abuts against the second limiting rod (7) to prevent the single leaf spring body (1), which has broken into a shorter segment, from continuing to rotate.

2. The single-leaf spring suspension system as described in claim 1, characterized in that: The first blocking part (6) includes: A stop plate (61) is fixed to the first bracket (3), and an arc-shaped groove is provided on the side of the stop plate (61) facing the first limiting rod (5); When the single leaf spring body (1) breaks in the area between the front axle mounting point (14) and the second bracket (4), and the first limiting rod (5) moves to abut against the groove wall of the arc groove, the groove wall of the arc groove prevents the first limiting rod (5) from continuing to move, so as to prevent the lug (2) from continuing to rotate.

3. The single-leaf spring suspension system as described in claim 1, characterized in that: The second limiting rod (7) includes: Two rods, one of which is fixed through the first lug (2) and the other rod is fixed through the second lug (2). The second abutment (8) provides a limiting channel (9) for each of the rods and forms an abutment block (81) with one side of the limiting channel (9). The rod is located in the limiting channel (9). When the rod moves to abut against the abutment block (81), the abutment block (81) prevents the single leaf spring body (1) from continuing to rotate.

4. The single-leaf spring suspension system as described in claim 1 or 3, characterized in that: The stop block (81) is integrally formed with the single leaf spring body (1).

5. The single-leaf spring suspension system as described in claim 1, characterized in that: A protective plate (10) is fixed at the bottom of the single-leaf spring body (1), and the length direction of the protective plate (10) is consistent with the length direction of the single-leaf spring body (1). When the single leaf spring body (1) breaks in the area between the front axle mounting point (14) and the first bracket (3), and the broken single leaf spring body (1) in a shorter segment abuts against the protective plate (10), the broken single leaf spring body (1) in a shorter segment is prevented from continuing to move.

6. The single-leaf spring suspension system as described in claim 5, characterized in that: The protective sheet (10) has flanges (11) on both sides, and the spacing between the two flanges (11) is consistent with the width direction of the protective sheet (10).

7. The single-leaf spring suspension system as described in claim 1, characterized in that: A variable stiffness limiting block (12) is provided above the front axle mounting point (14), and the variable stiffness limiting block (12) is used to fix it to the bottom of the frame (13).

8. A vehicle, characterized in that, It includes the single-leaf spring suspension system as described in any one of claims 1-7.

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