Plate spring lifting lug, plate spring suspension and vehicle

Abstract

The utility model discloses a plate spring lifting lug and a vehicle. The plate spring lifting lug comprises a connecting plate and a lining, and one end of the connecting plate is used for being connected to a vehicle body; the lining is arranged at the other end of the connecting plate and used for being connected with the plate spring, the lining comprises a mandrel, an outer sleeve and a buffering piece arranged between the mandrel and the outer sleeve, a first matching part is arranged on the connecting plate, a second matching part is arranged at the end of the mandrel, and the first matching part is matched with the second matching part to achieve anti-rotation limiting. Therefore, anti-rotation limiting between the core shaft and the connecting plate is achieved through matching of the first matching part and the second matching part, the stress of the plate spring lifting lug can be improved, the stability and reliability of the plate spring lifting lug in the working process can be improved, and therefore the use experience of a user is improved, and the service life of the plate spring suspension is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of leaf spring suspensions, and in particular to a leaf spring lifting eye, a leaf spring suspension, and a vehicle. Background Art

[0002] In the related art, the leaf spring suspension is connected to the vehicle body through leaf spring hangers. When the vehicle is driving, the leaf spring suspension needs to withstand road excitation and offset vibration.

[0003] However, with long-term use of the vehicle or poor road conditions, the leaf spring ears are likely to become loose, which in turn causes the connection structure between the leaf spring suspension and the vehicle body to become loose, and even produces abnormal noise, affecting the user experience and reducing the reliability and durability of the leaf spring suspension. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a leaf spring eye, a leaf spring suspension, and a vehicle, wherein the leaf spring eye has a more stable connection with the vehicle body, thereby improving the user experience and extending the service life and operating reliability of the leaf spring suspension.

[0005] In the first aspect, the leaf spring lifting ear according to the embodiment of the present application includes: a connecting plate and a bushing, one end of the connecting plate is used to be connected to the vehicle body; the bushing is arranged at the other end of the connecting plate, and the bushing is used to be connected to the leaf spring, the bushing includes: a core shaft, an outer sleeve and a buffer member arranged between the core shaft and the outer sleeve, wherein a first matching portion is provided on the connecting plate, and a second matching portion is provided on the end of the core shaft, and the first matching portion cooperates with the second matching portion to achieve anti-rotation limiting.

[0006] According to the leaf spring lifting ear of the embodiment of the present application, the anti-rotation limit between the core shaft and the connecting plate is realized by the cooperation between the first matching part and the second matching part, which can improve the force of the leaf spring lifting ear, improve the stability and reliability of the leaf spring lifting ear during operation, thereby improving the user experience and extending the service life of the leaf spring suspension.

[0007] According to a further embodiment of the present application, a mounting hole is formed on the connecting plate, the core shaft passes through the mounting hole, the first matching portion is constructed as an internal spline in the mounting hole, and the second matching portion is constructed as an external spline on the core shaft.

[0008] According to a further embodiment of the present application, a limiting plate is integrally formed on at least one axial end of the core shaft, and the limiting plate is suitable for pushing against the connecting plate.

[0009] Furthermore, there are two connecting plates, which are arranged opposite to each other at the two ends of the core shaft and are connected to the core shaft. There are two limiting plates, which are respectively formed at the axial ends of the core shaft.

[0010] In some embodiments, the distance between the limiting plate and the end surface of the core shaft adjacent to the limiting plate is less than or equal to the thickness of the connecting plate.

[0011] According to a further embodiment of the present application, a first matching portion is provided on the connecting plate, and a second matching portion is provided on the core shaft. The first matching portion cooperates with the second matching portion to achieve anti-rotation limiting.

[0012] In some embodiments, a mounting hole is formed on the connecting plate, the core shaft passes through the mounting hole, the first matching portion is configured as an internal spline in the mounting hole, and the second matching portion is configured as an external spline on the core shaft.

[0013] According to a further embodiment of the present application, the leaf spring lifting eye further includes: a connecting shaft, the connecting shaft passing through one end of the connecting plate connected to the vehicle body, and connected to the vehicle body.

[0014] In a second aspect, a leaf spring suspension according to an embodiment of the present application includes: a leaf spring, wherein at least one end of the leaf spring is formed with a coil ear; and a leaf spring hanging ear according to any one of the aforementioned embodiments, wherein the bushing is connected to the coil ear.

[0015] According to a further embodiment of the present application, an interference fit portion is provided on the outer peripheral surface of the outer sleeve, and the interference fit portion is interference-fitted with the inner wall surface of the rolled ear.

[0016] In some embodiments, the interference fit portion is configured to extend axially along the outer sleeve, and the plurality of protrusions spaced apart in the circumferential direction are edges.

[0017] In a third aspect, the present application further proposes a vehicle provided with the leaf spring suspension in the above embodiment.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of the exploded structure of a leaf spring lifting eye and a portion of a leaf spring according to some embodiments of the present application;

[0021] Figure 2 is a schematic diagram of a bushing structure according to other embodiments of the present application;

[0022] Figure 3 is a schematic cross-sectional view of a leaf spring lifting lug according to some embodiments of the present application;

[0023] Figure 4 is a schematic cross-sectional view of a leaf spring lifting ear according to other embodiments of the present application;

[0024] Figure 5 This is a schematic diagram of a leaf spring suspension structure according to some embodiments of the present application.

[0025] Reference numerals:

[0026] 100-leaf spring lifting eye;

[0027] 110 - connecting plate, 111 - first plate, 112 - second plate, 113 - first mating portion, 114 - mounting hole;

[0028] 120-bushing, 121-core shaft, 1211-second matching portion, 122-buffer, 123-jacket, 1231-edge, 124-limiting plate, 1241-first limiting plate, 1242-second limiting plate, 130-bolt, 140-fastening nut;

[0029] 150-connecting shaft;

[0030] 200-leaf spring, 210 leaf spring body, 220-first coil ear, 230-second coil ear. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] 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", "counterclockwise", "axial", "radial", "circumferential" and the like 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 device or element referred to 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.

[0033] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0034] In the description of this application, “plurality” means two or more.

[0035] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0036] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0037] Below, refer to the attached Figure 1-Figure 5 The leaf spring eye 100 , the leaf spring suspension, and the vehicle according to the embodiments of the present application are described.

[0038] The leaf spring eye 100 according to the embodiment of the present application includes a connecting plate 110 and a bushing 120 .

[0039] One end of the connecting plate 110 is used to be connected to the vehicle body.

[0040] For example, Figures 1-4 It is understood that the connecting plates 110 are a pair and both are bent plate bodies, and a connecting shaft 150 is constructed on the connecting plate 110 to connect to the vehicle body, wherein the two ends of the connecting shaft 150 are respectively passed through the two connecting plates 110 to connect the two connecting plates 110, and the circumferential surface of the connecting shaft 150 can be matched with the corresponding pin holes set on the vehicle body to realize the connection between the connecting plate 110 and the vehicle body.

[0041] Of course, the connecting plate 110 may also be connected to the vehicle body through other structures, such as directly connected to the vehicle body through screws or other structures, and the specific structure will not be described in detail.

[0042] The bushing 120 is disposed at the other end of the connecting plate 110 , and the bushing 120 is used to connect with the ear at the end of the leaf spring 200 .

[0043] In other words, one end of the leaf spring eye 100 is connected to the vehicle body through the connecting shaft 150 , and the other end is connected to the leaf spring 200 , so as to achieve connection between the leaf spring 200 and the vehicle body.

[0044] Among them, reference Figure 1 and Figure 2 As shown, the bushing 120 includes a core shaft 121, an outer sleeve 123 and a buffer member 122 arranged between the core shaft 121 and the outer sleeve 123. The two ends of the core shaft 121 are respectively passed through the two connecting plates 110, and are located at the two ends of the connecting plates 110 respectively with the connecting shaft 150. The buffer member 122 and the outer sleeve 123 are sequentially sleeved on the outer side of the core shaft 121, and the outer periphery of the outer sleeve 123 is suitable for sleeved on the ear of the leaf spring 200 so as to be connected to the end of the leaf spring 200.

[0045] It should be noted that since the core shaft 121 is inserted into the connecting plate 110 and the core shaft 121 is generally cylindrical, the core shaft 121 may rotate relative to the connecting plate 110 when load is transferred between the core shaft 121 and the connecting plate 110. To prevent the core shaft 121 from rotating, sufficient pre-tightening force is usually applied to the fastening nut 140 at the end of the core shaft 121 to ensure that the two do not rotate relative to each other. However, in actual practice, it has been found that even if a large tightening torque is applied, the core shaft 121 and the connecting plate 110 still rotate relative to each other. For example, after the vehicle has traveled a certain mileage, the tightening torque between the core shaft 121 and the connecting plate 110 decreases, thereby causing relative rotation between the core shaft 121 and the connecting plate 110.

[0046] To this end, the present application further provides a first matching portion 113 on the connecting plate 110 , and a second matching portion 1211 on the end of the core shaft 121 . The first matching portion 113 cooperates with the second matching portion 1211 to achieve anti-rotation limiting.

[0047] Specifically, the first mating portion 113 can be in various forms, such as a bump or spline, and the second mating portion 1211 corresponds to the first mating portion 113. The second mating portion 1211 can be a groove, spline, or other structure with a concave-convex or spline fit. Furthermore, the first mating portion 113 and the second mating portion 1211 mate to form a rotation limiter along the circumference of the core shaft 121 and the connecting plate 110.

[0048] It is understood that when the vehicle is driving, the leaf spring eye 100 is subjected to various dynamic loads and vibrations, which in turn drive the bushing 120 to rotate about the connecting shaft 150. During this process, these external forces may cause the core shaft 121 to rotate relative to the connecting plate 110. The first mating portion 113 and the second mating portion 1211 can be used to prevent the core shaft 121 from rotating relative to the connecting plate 110. For example, the first mating portion 113 and the second mating portion 1211 form multiple contact points, which act together on the circumferential area where the core shaft 121 and the connecting plate 110 meet, making it difficult for the core shaft 121 to rotate relative to the connecting plate 110, thereby improving the force applied to the leaf spring eye 100 and enhancing the stability and reliability of the leaf spring eye 100.

[0049] According to the leaf spring ear 100 of the embodiment of the present application, the anti-rotation limit between the core shaft 121 and the connecting plate 110 is realized by cooperating with the first matching portion 113 and the second matching portion 1211, which can improve the force applied to the leaf spring ear 100 and improve the stability and reliability of the leaf spring ear 100 during operation, thereby improving the user experience and extending the service life of the leaf spring suspension.

[0050] Exemplary, reference Figure 1As shown, a mounting hole 114 is formed on the connecting plate 110 , the end of the core shaft 121 is passed through the mounting hole 114 , and the first matching portion 113 is constructed as an internal spline in the mounting hole 114 , and the second matching portion 1211 is constructed as an external spline on the core shaft 121 .

[0051] Specifically, both the internal and external splines include multiple evenly distributed protrusions or tooth grooves that match each other in shape and position, allowing the external spline to fit tightly together when inserted into the internal spline. This interlocking structure creates multiple contact points along the circumference of the core shaft 121, thereby locking the internal and external splines and increasing the resistance to rotation of the core shaft 121 relative to the connecting plate 110, thereby achieving anti-rotation limit.

[0052] It is understandable that when the vehicle is running, the leaf spring eye 100 will be subjected to various dynamic loads and vibrations. These external forces may cause the core shaft 121 to attempt to rotate relative to the connecting plate 110. However, due to the tight fit between the internal spline and the external spline, the rotation of the core shaft 121 will be significantly restricted. Even under the action of external forces, it is difficult for the core shaft 121 to overcome the resistance provided by the spline structure and rotate relative to it. Further, when the vehicle is running and is subjected to road excitation and causes the leaf spring 200 to deform under load, the reference Figure 5 It is understood that the leaf spring eye 100, as a connecting piece between the vehicle body and the leaf spring 200, will produce the following Figure 5 The excitation movement shown by the straight arrow in the middle, during the movement, the leaf spring ear 100 is connected to one end of the leaf spring 200 (i.e., the bushing 120) with the connecting shaft 150 as the center, and performs as follows Figure 5 Swing in the direction of the middle arc arrow. Under normal conditions, the core shaft 121 and the connecting plate 110 should remain relatively stationary, that is, the core shaft 121 will not move relative to the connecting plate 110 along its own axis.

[0053] However, as the vehicle's mileage increases, or when the vehicle frequently drives on harsh road conditions, the leaf spring ear 100 frequently reciprocates under the drive of the leaf spring 200, and the fasteners used to fasten the core shaft 121 and the connecting plate 110 may become loose, and the matching area between the core shaft 121 and the connecting plate 110 will become loose, that is, the area where the core shaft 121 passes through the connecting plate 110 will have a clearance, causing the core shaft 121 to move relative to the connecting piece along its own axis.

[0054] Specifically, take the common case where the core shaft 121 is fixed to the connecting plate 110 by tightening the fastening nut 140 at the end of the core shaft 121 as an example, for example Figure 1As the leaf spring lug 100 reciprocates, the torque of the fastening nut 140 between the connecting plate 110 and the core shaft 121 is reduced, thereby causing a loose space to be generated between the end of the core shaft 121 and the connecting plate 110.

[0055] Therefore, after the core shaft 121 and the connecting plate 110 become loose, the two will produce relative movement along with the movement of the leaf spring ear 100. For example, the core shaft 121 will move along the axial direction in the connecting plate 110, and while generating abnormal noise, it will affect the fatigue durability and reliability of the leaf spring ear 100 and even the leaf spring suspension connected thereto. For this reason, a limiting plate 124 is integrally formed at at least one axial end of the core shaft 121, and the limiting plate 124 is suitable for pushing against the connecting plate 110.

[0056] Specifically, the limit plate 124 is pushed against the connecting plate 110 along the axial direction of the core shaft 121 to limit the axial movement of the core shaft 121 relative to the connecting plate 110. In different examples, the limit plate 124 can be constructed at one end or both ends of the core shaft 121.

[0057] For example, Figure 3 As shown, the limit plate 124 can be constructed at one end of the core shaft 121, and the two connecting plates 110 are defined as the first plate body 111 and the second plate body 112 respectively, wherein a bolt 130 is passed through the inside of the core shaft 121. When assembling the leaf spring ear 100, the core shaft 121 is first placed between the first plate body 111 and the second plate body 112, and then the bolt 130 is passed through the first plate body 111, the core shaft 121 and the second plate body 112 in turn, and the passed-through end is fastened by the fastening nut 140.

[0058] Among them, the first plate body 111 and the second plate body 112 are arranged opposite to each other, a head is formed at one end of the screw 130, the core shaft 121 is provided with a limiting plate 124, and the limiting plate 124 is arranged on the same side as the head of the screw 130, and the other end of the screw 130 is connected to the fastening nut 140 to fix the connecting plate 110, and the two end faces of the core shaft 121 are respectively pushed against the head of the screw 130 and the fastening nut 140.

[0059] Continue to refer Figure 3 As shown, as the vehicle mileage increases, the fastening nut 140 may become loose, and after the bushing 120 itself is worn, it may also become loose relative to the connecting plate 110, resulting in the head of the bolt 130 and the fastening nut 140 being unable to be firmly pushed to the first plate body 111 and the second plate body 112 respectively, causing the core shaft 121 to have a clearance along its own axial direction relative to the connecting plate 110, and causing the core shaft 121 to move relative to the connecting plate 110.

[0060] At this time, since the first plate 111 is in contact with the limiting plate 124, the limiting plate 124 pushes against the first plate 111 to limit the movement of the core shaft 121 along its own axis toward the first plate 111 (to the left in the figure), thereby reducing the movement of the core shaft 121 along its own axis relative to the connecting plate 110. This prevents the core shaft 121 from moving significantly along its own axis relative to the connecting plate 110 when the vibration of the leaf spring 200 is transmitted through the winding ear to the outer sleeve 123 and then to the core shaft 121, thereby reducing the degree of looseness between the core shaft 121 and the connecting plate 110.

[0061] It can be understood that when connecting the vehicle body and the leaf spring 200, in order to prevent the bushing 120 in the leaf spring ear 100 for connecting to the leaf spring 200 and the connecting plate 110 for connecting the bushing 120 from becoming loose as the vehicle mileage increases, causing the bushing 120 to move along the axial direction relative to the connecting plate 110, a limit plate 124 is provided at the end of the core shaft 121 in the bushing 120. The limit plate 124 is suitable for pushing against the connecting plate 110 to form a limit relative to the connecting plate 110 along the axial direction of the bushing 120, thereby avoiding the bushing 120 from moving along the axial direction relative to the connecting plate 110, thereby avoiding abnormal noise and improving the fatigue durability and reliability of the leaf spring ear 100 and even the leaf spring suspension connected thereto.

[0062] In some embodiments, in order to ensure the limiting effect of the limiting plate 124 , two limiting plates 124 are provided, and the two limiting plates 124 are respectively defined as a first limiting plate 1241 and a second limiting plate 1242 .

[0063] As shown in the figure and Figure 4 The first plate 111 and the second plate 112 are disposed opposite each other at the ends of the core shaft 121 and are connected to the core shaft 121. A first limiting plate 1241 and a second limiting plate 1242 are respectively formed at the axial ends of the core shaft 121. The first limiting plate 1241 is pressed against the side wall of the connecting plate 110 facing the core shaft 121, and the second limiting plate 1242 is pressed against the side wall of the other connecting plate 110 facing the core shaft 121.

[0064] Therefore, the first limit plate 1241 and the second limit plate 1242 form a symmetrical or relative configuration on the core shaft 121 to ensure that when the dynamic load and vibration of the leaf spring suspension are transmitted to the core shaft 121, it can maintain relative stability with the connecting plate 110 and prevent it from moving relative to the connecting plate 110 along its own axial direction.

[0065] The first limiting plate 1241 is integrally formed with the core shaft 121 and is tightly fitted with the side wall of the first plate body 111 on one side facing the core shaft 121 so as to push against the first plate body 111, thereby being suitable for limiting the movement of the core shaft 121 along its own axis toward the first plate body 111 (left in the figure). The second limiting plate 1242 is integrally formed with the core shaft 121 and is tightly fitted with the side wall of the second plate body 112 on one side facing the core shaft 121 so as to push against the second plate body 112, thereby limiting the movement of the core shaft 121 along its own axis toward the second plate body 112 (right in the figure).

[0066] Therefore, the first limiting plate 1241 and the second limiting plate 1242 are respectively suitable for limiting the movement of the core shaft 121 in two directions along its axis. When the core shaft 121 has a tendency to move along its own axis, the first limiting plate 1241 and the second limiting plate 1242 respectively limit it in two directions of its axis to avoid looseness in the connection area between the core shaft 121 and the first plate body 111 and the second plate body 112, so as to improve the stability of the core shaft 121 relative to the connecting plate 110, thereby avoiding abnormal noise.

[0067] In some preferred examples, the distance between the limiting plate 124 and the end surface of the core shaft 121 adjacent to the limiting plate 124 is less than or equal to the thickness of the connecting plate 110. Figure 2 -and Figure 4 As shown for understanding.

[0068] For the first limiting plate 1241, the end face of the core shaft 121 adjacent to the first limiting plate 1241 is the head of the screw 130, and the head of the screw 130 is pushed to the side wall of the first plate 111 away from the core shaft 121, and the first limiting plate 1241 is pushed to the side wall of the first plate body 111 facing the core shaft 121.

[0069] Correspondingly, when the distance between the end surface of the screw head 130 adjacent to the first limiting plate 1241 and the first limiting plate 1241 is equal to the thickness of the first connecting plate 110, the first limiting plate 1241 and the head of the bolt 130 respectively fit against the side walls of the first plate 111. When the distance between the end surface of the screw head 130 adjacent to the first limiting plate 1241 and the first limiting plate 1241 is less than the thickness of the first connecting plate 110, the space formed between the first limiting plate 1241 and the head of the bolt 130 can form an interference fit with the first plate 111, thereby stably securing the first plate 111 therein.

[0070] Similarly, for the second limiting plate 1242, the end face of the core shaft 121 adjacent to the second limiting plate 1242 is the end face of the fastening nut 140, and the fastening nut 140 is pushed to the side wall of the second plate body 112 away from the core shaft 121, and the second limiting plate 1242 is pushed to the side wall of the second plate body 112 facing the core shaft 121.

[0071] Correspondingly, when the distance between the end surface of the fastening nut 140 adjacent to the second limiting plate 1242 and the second limiting plate 1242 is equal to the thickness of the second connecting plate 110, the second limiting plate 1242 and the fastening nut 140 are respectively in contact with the two side walls of the second plate body 112. When the distance between the end surface of the fastening nut 140 adjacent to the second limiting plate 1242 and the second limiting plate 1242 is less than the thickness of the second connecting plate 110, the space formed between the second limiting plate 1242 and the head of the bolt 130 can form an interference fit with the second plate body 112, thereby stably securing the second plate body 112 therein.

[0072] It can be understood that the distance between the limit plate 124 and the end face of the core shaft 121 adjacent to the limit plate 124 is less than or equal to the thickness of the connecting plate 110, so that the limit plate 124 and the end face of the core shaft 121 adjacent to the connecting plate 110 can be locked or clamped, thereby limiting the movement of the core shaft 121 along its axial direction and improving the stability between the core shaft 121 and the connecting plate 110.

[0073] Further references Figure 5 The leaf spring suspension according to the embodiment of the present application includes a leaf spring 200 and the leaf spring eye 100 described in any of the above embodiments. The leaf spring 200 includes a leaf spring body, and a curling ear is formed at at least one end of the leaf spring body, and the curling ear is connected to the leaf spring eye 100.

[0074] like Figure 5 Both ends of the leaf spring 200 are provided with ears. The ear on the left side of the figure is defined as the first ear 220, which is directly connected to the vehicle body (not shown in the figure), and the ear on the right side is defined as the second ear 230. The second ear 230 is sleeved on the outside of the bushing 120 of the leaf spring ear 100, and the connecting shaft 150 at the other end of the leaf spring ear 100 is connected to the vehicle body.

[0075] Next, take the car body as the observation reference and continue to refer to Figure 5 , explaining the movement of the leaf spring suspension.

[0076] Under this observation reference, when the vehicle is running, the leaf spring 200 will bend and deform in the direction perpendicular to the straight arrow in the figure and reset after deformation to cushion the vibration of the vehicle body. During the bending and deformation of the leaf spring 200, since the distance between the two ends of the leaf spring 200 is shortened and the position of the first ear 220 is fixed, the second ear 230 connected to the bushing 120 will drive the bushing 120 to move toward the first ear 220, thereby driving the bushing 120 to rotate with the connecting shaft 150 as the rotation center.

[0077] Furthermore, due to the influence of various factors such as materials, manufacturing precision, and installation process, the connection between the second ear 230 and the bushing 120 may gradually loosen as the vehicle mileage increases, resulting in a gradual loosening of the fitting surfaces between the two. This causes a slight relative sliding to occur between the second ear 230 and the bushing 120 during the bending and deformation of the leaf spring 200. As the relative sliding continues, the contact surface between the second ear 230 and the bushing 120 will gradually wear out, further reducing the fitting precision and stability between the two, thereby affecting the overall performance of the leaf spring suspension, resulting in abnormal noise and reduced reliability.

[0078] Furthermore, since the connection interface between the second ear 230 and the bushing 120 may not always maintain a tight fit, the clamping force between the second ear 230 and the bushing 120 is insufficient, which may cause the bushing 120 to slide relative to the second ear 230 along its own axis.

[0079] To this end, in some embodiments, an interference fit portion is provided on the outer circumferential surface of the outer sleeve 123 , and the interference fit portion is interference-fitted with the inner wall surface of the second rolled ear 230 .

[0080] Specifically, the buffer member 122 provided outside the core shaft 121 may be a rubber layer, and a jacket 123 is formed on the outer periphery of the rubber layer. Figures 1-4 It is understood that the outer diameter of the outer sleeve 123 is constructed to be larger than the inner diameter of the second lug 230, and the interference fit portion constructed on the outer surface of the outer sleeve 123 is suitable for increasing the press-off force between the outer surface of the outer sleeve 123 and the inner axial surface of the second lug 230, thereby limiting the relative rotation between the second lug 230 and the outer sleeve 123.

[0081] Exemplary, reference Figure 4 As shown, the interference fit portion is constructed as a plurality of protrusions extending axially along the outer sleeve and spaced apart in the circumferential direction as edges 1231, wherein the outer sleeve 123 is constructed as an outer steel tube, and the outer peripheral surface of the outer sleeve 123 is provided with 12 protruding edges 1231 in a circumferential array.

[0082] In some examples, each edge 1231 is interference fit with the coil ear after the bushing 120 is pressed into the coil ear, thereby ensuring that there is a press-out force of at least 8 kN between the bushing 120 and the coil ear, and in some cases the press-out force can exceed 10 kN, thereby achieving a firm fixation between the bushing 120 and the coil ear during the violent movement after the leaf spring is loaded, without deflection or misalignment between the two.

[0083] Specifically, the edge 1231 is a protrusion formed on the outer circumference of the outer sleeve 123. When the protruding edge 1231 contacts the inner wall of the second lug 230, it can generate greater friction than a flat mating structure, thereby increasing the force (i.e., the pressure-release force) that presses the outer sleeve 123 against the second lug 230. This increased pressure helps prevent the outer sleeve 123 from sliding or rotating relative to the second lug 230 when subjected to external forces (such as vibration and deformation of the leaf spring 200 during vehicle operation). In addition, the protrusion of the edge 1231 and the inner wall of the second lug 230 form a toothed structure to form a more secure connection.

[0084] It can be understood that the interference fit portion is connected to the core shaft 121 through the buffer part 122, and its outer wall surface is interference fit with the inner circumferential surface of the second coil ear 230 through the interference fit portion, so as to increase the pressing force between the bushing 120 and the second coil ear 230 of the leaf spring 200, so that the bushing 120 is more difficult to slide or rotate relative to the second coil ear 230 when subjected to external force (such as vibration and deformation of the leaf spring 200 during vehicle driving), thereby improving the stability of the leaf spring lug 100 in the leaf spring suspension, and thus improving the reliability of the leaf spring suspension.

[0085] The vehicle according to the embodiment of the present application is provided with the leaf spring suspension described in any one of the aforementioned embodiments.

[0086] During the operation of the vehicle, the connection structure between the connecting plate 110 spring suspension and the leaf spring ear 100 of the second coil ear 230 is more secure, so that the leaf spring suspension has better working conditions, that is, the bushing 120 in the leaf spring ear 100 will not produce abnormal movement relative to the connecting plate 110 and the second coil ear 230, thereby not only avoiding the problem of easy breakage and failure of the leaf spring 200, but also making the leaf spring ear 100 and the leaf spring 200 have better fatigue durability, and can avoid the problem of abnormal noise of the leaf spring 200 during driving, thereby improving user experience.

[0087] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0088] 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A leaf spring lifting eye, characterized in that: include: a connecting plate (110), one end of the connecting plate (110) being used for connecting to a vehicle body; A bushing (120) is provided at the other end of the connecting plate (110), and the bushing (120) is used to be connected to the leaf spring (200), and the bushing (120) includes: a core shaft (121), an outer sleeve (123), and a buffer member (122) provided between the core shaft (121) and the outer sleeve (123); wherein A first matching portion (113) is provided on the connecting plate (110), and a second matching portion (1211) is provided on the end of the core shaft (121); the first matching portion (113) cooperates with the second matching portion (1211) to achieve anti-rotation limiting.

2. The leaf spring eye according to claim 1, characterized in that: A mounting hole (114) is formed on the connecting plate (110), the core shaft (121) passes through the mounting hole (114), the first matching portion (113) is configured as an internal spline in the mounting hole (114), and the second matching portion (1211) is configured as an external spline on the core shaft (121).

3. The leaf spring eye according to claim 1, wherein: A limiting plate (124) is integrally formed at at least one axial end of the core shaft (121), and the limiting plate (124) is suitable for pushing against the connecting plate (110).

4. The leaf spring eye according to claim 3, characterized in that: There are two connecting plates (110), which are arranged opposite to each other at the two ends of the core shaft (121) and connected to the core shaft (121). There are two limiting plates (124), which are respectively formed at the two axial ends of the core shaft (121).

5. The leaf spring eye according to claim 3, characterized in that: The distance between the limiting plate (124) and the end surface of the core shaft (121) adjacent to the limiting plate (124) is less than or equal to the thickness of the connecting plate (110).

6. The leaf spring eye according to claim 1, characterized in that: The leaf spring lifting eye further comprises a connecting shaft (150), the connecting shaft (150) being passed through one end of the connecting plate (110) connected to the vehicle body and being connected to the vehicle body.

7. A leaf spring suspension, characterized in that: include: A leaf spring (200), wherein at least one end of the leaf spring (200) is formed with a coiled ear; The leaf spring hanging eye according to any one of claims 1 to 6, wherein the bushing (120) is connected to the winding ear.

8. The leaf spring suspension according to claim 7, characterized in that The outer peripheral surface of the outer sleeve (123) is provided with an interference fit portion, and the interference fit portion is interference fit with the inner wall surface of the rolled ear.

9. The leaf spring suspension according to claim 8, characterized in that The interference fit portion is constructed as a plurality of raised edges (1231) extending axially along the outer sleeve (123) and spaced apart in the circumferential direction.

10. A vehicle, characterized in that: A leaf spring suspension according to any one of claims 7 to 9 is provided.

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