Plate spring assembly and vehicle

Abstract

The utility model discloses a leaf spring assembly and a vehicle, the leaf spring assembly comprises a leaf spring, the leaf spring comprises a first leaf spring piece and a plurality of second leaf spring pieces, the second leaf spring pieces are stacked below the first leaf spring piece, and at least two matching grooves are symmetrically formed in the middle of the first leaf spring piece; and the at least two cable-stayed U-shaped bolts respectively penetrate through the at least two matching grooves and are connected with the balance shaft assembly. The matching groove is formed in the first plate spring piece, so that positioning of the cable-stayed U-shaped bolt is achieved, displacement of the cable-stayed U-shaped bolt is avoided, an independent upper pressing plate is omitted, parts are reduced, and light weight of the whole vehicle is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, in particular to a leaf spring assembly and a vehicle. Background Art

[0002] The existing leaf spring fixing method is to transmit force to the leaf spring and the axle hub through the upper leaf spring pressing plate. During the entire operation of the leaf spring, the middle section of the leaf spring actually does not play an elastic role, and the elastic deformation mainly occurs in the leaf spring outside the two U-bolts. The function of the upper leaf spring pressing plate is to position the U-bolts, so that the front and rear bolts are symmetric and do not move relative to each other. Its positioning is mainly achieved by the cooperation of the casting holes on the pressing plate and the ordinary hexagonal nuts that cooperate with the central bolts. When tightening the U-bolts, diagonal misalignment is likely to occur, resulting in uneven stress on the left and right bolts. During assembly, it is easy to be offset to one side, and there is stress concentration at the mating part. The assembly method is also relatively cumbersome. This assembly station is in the state where the leaf spring is inverted before the vehicle frame is flipped, which is not easy to observe. Due to the gravity, it is not easy to observe and position the assembly. Only when the nut pulls up the U-bolt can the positioning be visually observed. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a leaf spring assembly. By providing a mating groove on the first leaf spring plate, the positioning of the diagonal tension U-bolt is realized, the diagonal tension U-bolt is prevented from moving, the separate upper pressing plate is omitted, the number of parts is reduced, and the weight reduction of the whole vehicle is achieved.

[0004] The leaf spring assembly according to the first aspect embodiment of the utility model includes: a leaf spring, including: a first leaf spring plate and a plurality of second leaf spring plates, the plurality of second leaf spring plates are stacked below the first leaf spring plate, and at least two mating grooves are symmetrically arranged in the middle of the first leaf spring plate; at least two diagonal tension U-bolts, at least two of the diagonal tension U-bolts respectively pass through at least two of the mating grooves and are connected to the balance shaft assembly.

[0005] The leaf spring assembly according to the embodiment of the utility model realizes the positioning of the diagonal tension U-bolt by providing a mating groove on the first leaf spring plate, prevents the diagonal tension U-bolt from moving, omits the separate upper pressing plate, reduces the number of parts, and realizes the weight reduction of the whole vehicle.

[0006] According to some embodiments of the utility model, the mating groove includes: a bottom wall, the bottom wall is inclined; the diagonal tension U-bolt includes: a bottom plate and two supporting feet, the two supporting feet are connected to both ends of the bottom plate, and the supporting feet are connected to the balance shaft assembly; the bottom wall is perpendicular to the supporting feet.

[0007] According to some embodiments of the utility model, the angle between the bottom wall and the horizontal plane is θ, and θ satisfies the relationship: 5° ≤ θ ≤ 15°.

[0008] According to some embodiments of the present utility model, the fitting groove further includes: a first side wall and a second side wall, the lower sides of the first side wall and the second side wall are respectively connected to two sides of the bottom wall in the left - right direction, and the upper sides are connected to the upper surface of the first leaf spring.

[0009] According to some embodiments of the present utility model, a first fillet transition is provided between the first side wall and the bottom wall; and / or, a second fillet transition is provided between the second side wall and the bottom wall.

[0010] According to some embodiments of the present utility model, the radius of the first fillet is R1, and R1 satisfies the relation: 2 mm ≤ R1 ≤ 5 mm; and / or, the radius of the second fillet is R2, and R2 satisfies the relation: 2 mm ≤ R2 ≤ 5 mm.

[0011] According to some embodiments of the present utility model, a third fillet transition is provided between the first side wall and the upper surface of the first leaf spring; and / or, a fourth fillet transition is provided between the second side wall and the upper surface of the second leaf spring.

[0012] According to some embodiments of the present utility model, the radius of the third fillet is R3, and R3 satisfies the relation: 8 mm ≤ R3 ≤ 12 mm; and / or, the radius of the fourth fillet is R4, and R4 satisfies the relation: 8 mm ≤ R4 ≤ 12 mm.

[0013] A vehicle according to an embodiment of the second aspect of the present utility model includes: the leaf spring assembly; a balance shaft assembly, the balance shaft assembly includes: a shaft hub and a balance shaft bracket, the leaf spring assembly is fixedly connected to the shaft hub, and the shaft hub and the balance shaft bracket are rotatably connected.

[0014] According to some embodiments of the present utility model, a groove is provided on the shaft hub, the leaf spring is fitted in the groove, and the diagonal - pull U - shaped bolt is connected to the shaft hub after passing through the fitting groove.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above - mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0017] Figure 1 is an overall schematic diagram of a leaf spring and a balance shaft assembly according to an embodiment of the present utility model;

[0018] Figure 2It is a schematic structural diagram of a balance shaft assembly in one direction according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the balance shaft assembly in another direction according to an embodiment of the present invention

[0020] Figure 4 It is a schematic connection diagram of a leaf spring and a balance shaft assembly according to an embodiment of the present invention;

[0021] Figure 5 is Figure 4 partial schematic diagram A;

[0022] Figure 6 It is a schematic structural diagram of a leaf spring according to an embodiment of the present invention;

[0023] Figure 7 is Figure 6 partial schematic diagram B;

[0024] Figure 8 It is a schematic structural diagram of a diagonal tension U-bolt according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 10, leaf spring; 11, first leaf spring leaf; 111, mating groove; 112, bottom wall; 113, first side wall; 114, second side wall; 115, first fillet; 116, second fillet; 117, third fillet; 118, fourth fillet; 12, second leaf spring leaf;

[0027] 20, diagonal tension U-bolt; 21, bottom plate; 22, support leg;

[0028] 30, balance shaft assembly; 31, shaft hub; 311, mounting portion; 312, mounting hole; 32, balance shaft bracket. Detailed Description of the Invention

[0029] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0030] Reference will be made below to Figures 1-8 to describe a leaf spring assembly according to an embodiment of the present invention, and a vehicle including the above leaf spring assembly is also proposed.

[0031] As Figure 1 and Figure 4 shown, the leaf spring assembly includes: a leaf spring 10 and a diagonal tension U-bolt 20. The leaf spring 10 is connected to the balance shaft assembly 30 through the diagonal tension U-bolt 20.

[0032] According to Figure 1 ,Figure 4 and Figure 6 As shown in Figure 6 , the leaf spring 10 includes: a first leaf spring plate 11 and a plurality of second leaf spring plates 12. The plurality of second leaf spring plates 12 are stacked below the first leaf spring plate 11, and at least two mating grooves 111 are symmetrically arranged in the middle of the first leaf spring plate 11. Specifically, the first leaf spring plate 11 is arranged on the uppermost side, the plurality of second leaf spring plates 12 are sequentially overlapped and arranged below the first leaf spring plate 11, at least two downwardly concave mating grooves 111 are formed in the middle of the first leaf spring plate 11, and at least two mating grooves 111 are symmetric about the midline of the first leaf spring plate 11.

[0033] There are at least two diagonal tension U-bolts 20, and the number of the diagonal tension U-bolts 20 is the same as that of the mating grooves 111. At least two diagonal tension U-bolts 20 respectively pass through at least two mating grooves 111 and are connected to the balance shaft assembly 30 to connect the leaf spring 10 with the balance shaft assembly 30.

[0034] By arranging the mating grooves 111 on the first leaf spring plate 11, the function of positioning the diagonal tension U-bolts 20 is realized. Compared with the prior art, a separate upper pressure plate is omitted, achieving the purpose of weight reduction of the overall suspension. When fixing the leaf spring 10, the diagonal tension U-bolts 20 are directly stuck in the mating grooves 111, and the leaf spring is clamped by connecting the diagonal tension U-bolts 20 with the axle hub 31. During the production process, the work station for positioning the cover plate is also reduced.

[0035] The diagonal tension U-bolts 20 are connected to the balance shaft assembly 30, and the forces on the two diagonal tension U-bolts 20 are on their axes to prevent the diagonal tension U-bolts 20 from moving back and forth. A lateral guiding device is connected to the leaf spring 10 to prevent the diagonal tension U-bolts 20 from being misaligned.

[0036] In some embodiments of the present invention, there may be two mating grooves 111. Correspondingly, there are two diagonal tension U-bolts 20. The two mating grooves 111 are symmetric about the midline of the first leaf spring plate 11 in the extending direction. The mating grooves 111 are downwardly concave. The two diagonal tension U-bolts 20 are respectively fitted in the two mating grooves 111 so that the diagonal tension U-bolts 20 pass through the mating grooves 111 and are connected to the balance shaft assembly 30.

[0037] Among them, the mating grooves 111 can be formed by forging the first leaf spring plate 11. By adopting the forging method, the mating grooves 111 are constructed in the middle of the first leaf spring plate 11. The mating grooves 111 can realize the positioning of the diagonal tension U-bolts 20, and can improve the assembly accuracy and assembly efficiency on the basis of light weight.

[0038] As Figure 8 shown in Figure 8 , the diagonal tension U-bolts 20 can adopt a flat-bottom U-shaped structure to increase the contact area between the diagonal tension U-bolts 20 and the mating grooves 111 and reduce stress concentration.

[0039] Thus, by providing a mating groove 111 on the first leaf spring 11, the positioning of the stay U-bolt 20 is achieved, preventing the stay U-bolt 20 from moving around, eliminating the need for a separate upper pressure plate, reducing the number of components, and achieving vehicle weight reduction.

[0040] Combined with Figure 3 , Figures 6-8 As shown, the mating groove 111 includes: a bottom wall 112, which is inclined; the stay U-bolt 20 includes: a bottom plate 21 and two legs 22, the two legs 22 being connected to both ends of the bottom plate 21, and the legs 22 being connected to the balance shaft assembly 30; the bottom wall 112 is perpendicular to the legs 22. Specifically, a plurality of mounting portions 311 are provided on the hub 31 of the balance shaft assembly 30, a mounting hole 312 is provided on any one of the mounting portions 311, and any one stay U-bolt 20 corresponds to two mounting holes 312, and the two legs 22 respectively pass through the two mounting holes 312 and are fixedly connected to the hub 31.

[0041] Moreover, the axial direction of the mounting hole 312, i.e., the extending direction of the leg 22, and since the bottom wall 112 is perpendicular to the leg 22, the axial direction of the mounting hole 312 is perpendicular to the bottom wall 112.

[0042] In the embodiment of the present invention, there may be 4 mounting portions 311, and a mounting hole 312 is provided on any one of the mounting portions 311, so there are 4 mounting holes 312. Two of the mounting holes 312 cooperate with one stay U-bolt 20, and the other two mounting holes 312 cooperate with another stay U-bolt 20 to fixedly connect the leaf spring 10 to the hub 31.

[0043] The stay U-bolt 20 is sleeved on the mating groove 111, the bottom plate 21 abuts against the mating groove 111, and the two legs 22 respectively pass through the two mounting holes 312 and are fixedly connected to the hub 31 of the balance shaft assembly 30 to fix the leaf spring 10 on the hub 31.

[0044] Any one stay U-bolt 20 corresponds to two mounting holes 312, and the axial directions of the two mounting holes 312 are both parallel to the extending direction of the leg 22, so the radial directions of the two mounting holes 312 are both parallel to the bottom wall 112, ensuring the mating accuracy between the stay U-bolt 20, the mating groove 111, and the hub 31, and preventing the stay U-bolt 20 from moving back and forth.

[0045] As Figure 7 shown, the angle between the bottom wall 112 and the horizontal plane is θ, and θ satisfies the relationship: 5° ≤ θ ≤ 15°. Specifically, the angle between the bottom wall 112 and the horizontal plane can be 8°, or 12°, or 10°. The inclination angle of the bottom wall 112 relative to the horizontal plane is determined according to the inclination angle of the radial direction of the mounting hole 312 on the hub 31 in the actual application scenario.

[0046] As shown Figure 5 in the figure, the mating groove 111 further includes: a first side wall 113 and a second side wall 114. The lower sides of the first side wall 113 and the second side wall 114 are respectively connected to both sides of the bottom wall 112 in the left - right direction, and the upper sides are connected to the upper surface of the first leaf spring 11. The first side wall 113 is bent relative to the bottom wall 112, and the angles between the first side wall 113, the second side wall 114 and the bottom wall 112 are all obtuse angles, so that the first side wall 113 and the second side wall 114 cooperate with the stay U - bolt 20. The lower side of the first side wall 113 is connected to one side of the bottom wall 112 in the left - right direction, and the lower side of the second side wall 114 is connected to the other side of the bottom wall 112 in the left - right direction. The bottom wall 112, the first side wall 113 and the second side wall 114 define the mating groove 111. The stay U - bolt 20 passes through the mating groove 111 and is fixedly connected to the hub 31, thereby installing the leaf spring 10 on the balance shaft assembly 30.

[0047] Combined Figure 7 as shown in the figure, the first side wall 113 and the bottom wall 112 are transitioned by a first fillet 115. Specifically, the first fillet 115 connects the first side wall 113 and the bottom wall 112, that is, there is a smooth transition between the first side wall 113 and the bottom wall 112, reducing the forging difficulty of the mating groove 111 on the first leaf spring 11.

[0048] In some embodiments, the radius of the first fillet 115 is R1, and R1 satisfies the relationship: 2 mm ≤ R1 ≤ 5 mm. That is to say, the radius of the first fillet 115 is between 2 mm and 5 mm, and it can be 3 mm, 3.5 mm, 4 mm, etc. If the radius of the first fillet 115 is less than 2 mm, the transition at the connection between the first side wall 113 and the bottom wall 112 is not smooth enough, which may interfere with the stay U - bolt 20; if the radius of the first fillet 115 is greater than 5 mm, it may occupy the space of the second fillet 116 on the upper side of the first side wall 113.

[0049] Furthermore, the second side wall 114 and the bottom wall 112 are transitioned by a second fillet 116. Specifically, the second fillet 116 connects the second side wall 114 and the bottom wall 112, that is, there is a smooth transition between the second side wall 114 and the bottom wall 112, reducing the forging difficulty of the mating groove 111 on the first leaf spring 11.

[0050] As Figure 7As shown, the radius of the second fillet 116 is R2, and R2 satisfies the relation: 2 mm ≤ R2 ≤ 5 mm. Specifically, the radius of the second fillet 116 is between 2 mm and 5 mm, and can be 3 mm, 3.5 mm, 4 mm, etc. If the radius of the second fillet 116 is less than 2 mm, the transition at the connection between the second side wall 114 and the bottom wall 112 is not smooth enough, which may interfere with the stay U-bolt 20; if the radius of the second fillet 116 is greater than 5 mm, it may occupy the space of the second fillet 116 on the upper side of the second side wall 114.

[0051] Furthermore, the first side wall 113 and the upper surface of the first leaf spring 11 are transitioned through a third fillet 117. Specifically, the third fillet 117 connects the first side wall 113 and the upper surface of the first leaf spring 11, that is, a smooth transition is formed between the first side wall 113 and the upper surface of the first leaf spring 11, reducing the forging difficulty of the mating groove 111 on the first leaf spring 11.

[0052] In some embodiments, the radius of the third fillet 117 is R3, and R3 satisfies the relation: 8 mm ≤ R3 ≤ 12 mm. That is to say, the radius of the third fillet 117 is between 8 mm and 12 mm, and can be 8 mm, 9 mm, 10 mm, 11 mm, etc. If the radius of the third fillet 117 is less than 8 mm, the transition at the connection between the first side wall 113 and the upper surface of the first leaf spring 11 is not smooth enough, which may interfere with the stay U-bolt 20; if the radius of the third fillet 117 is greater than 12 mm, it may occupy the space of the first fillet 115 on the lower side of the first side wall 113.

[0053] As Figure 7 shown, the second side wall 114 and the upper surface of the second leaf spring 12 are transitioned through a fourth fillet 118. Specifically, the fourth fillet 118 connects the second side wall 114 and the upper surface of the first leaf spring 11, that is, a smooth transition is formed between the second side wall 114 and the upper surface of the first leaf spring 11, reducing the forging difficulty of the mating groove 111 on the first leaf spring 11.

[0054] Moreover, the radius of the fourth fillet 118 is R4, and R4 satisfies the relation: 8 mm ≤ R4 ≤ 12 mm. That is to say, the radius of the fourth fillet 118 is between 8 mm and 12 mm, and can be 8 mm, 9 mm, 10 mm, 11 mm, etc. If the radius of the fourth fillet 118 is less than 8 mm, the transition at the connection between the first side wall 113 and the upper surface of the first leaf spring 11 is not smooth enough, which may interfere with the stay U-bolt 20; if the radius of the fourth fillet 118 is greater than 12 mm, it may occupy the space of the fourth fillet 118 on the lower side of the second side wall 114.

[0055] Combined with Figures 1-4As shown in the figure, the vehicle according to the second aspect embodiment of the present utility model includes: a leaf spring assembly and a balance shaft assembly 30. The balance shaft assembly 30 includes: a shaft hub 31 and a balance shaft bracket 32. The leaf spring 10 is fixedly connected to the shaft hub 31, and the shaft hub 31 and the balance shaft bracket 32 are rotatably connected. A groove is provided on the shaft hub 31, and the leaf spring is fitted in the groove, and the diagonal tension U-bolt passes through the fitting groove and then is connected to the shaft hub 31. Specifically, the shaft hub 31 is rotatably connected to the balance shaft bracket 32 through a bearing; the leaf spring 10 is arranged in the groove on the upper part of the shaft hub 31, at least two diagonal tension U-bolts 20 are sleeved on both ends of the shaft hub 31 and the leaf spring 10, and the lower ends of at least two diagonal tension U-bolts 20 pass through the mounting holes 312 of the shaft hub 31 and are fixedly connected to the shaft hub 31, thereby fixedly connecting the leaf spring 10 and the shaft hub 31.

[0056] The diagonal tension U-bolt 20 passes through the fitting groove 111 and is fixedly connected to the mounting hole 312 on the shaft hub 31 to fix the leaf spring 10 on the balance shaft bracket 32. By providing the fitting groove 111 on the first leaf spring piece 11, the positioning of the diagonal tension U-bolt 20 is realized, and the diagonal tension U-bolt 20 is prevented from moving. Compared with the prior art, the separate upper pressure plate is omitted, the number of parts is reduced, and the vehicle weight is reduced.

[0057] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A leaf spring assembly, characterized in that: include: A leaf spring (10) comprising: a first leaf spring leaf (11) and a plurality of second leaf spring leaves (12), wherein the plurality of second leaf spring leaves (12) are stacked below the first leaf spring leaf (11), and at least two matching grooves (111) are symmetrically arranged in the middle of the first leaf spring leaf (11); At least two obliquely-tensioned U-shaped bolts (20), wherein the at least two obliquely-tensioned U-shaped bolts (20) respectively pass through at least two matching grooves (111) and are connected to the balance shaft assembly (30).

2. The leaf spring assembly according to claim 1, characterized in that The matching groove (111) comprises: a bottom wall (112), and the bottom wall (112) is arranged at an angle; the oblique U-shaped bolt (20) comprises: a bottom plate (21) and two supporting legs (22), and the two supporting legs (22) are connected to two ends of the bottom plate (21), and the supporting legs (22) are connected to the balancing shaft assembly (30); the bottom wall (112) is perpendicular to the supporting legs (22).

3. The leaf spring assembly according to claim 2, characterized in that: The included angle between the bottom wall (112) and the horizontal plane is θ, and θ satisfies the relationship: 5°≤θ≤15°.

4. The leaf spring assembly according to claim 2, characterized in that The matching groove (111) also includes: a first side wall (113) and a second side wall (114), wherein the lower sides of the first side wall (113) and the second side wall (114) are respectively connected to the two sides of the bottom wall (112) in the left and right directions and the upper sides are connected to the upper surface of the first leaf spring (11).

5. The leaf spring assembly according to claim 4, characterized in that The first side wall (113) and the bottom wall (112) are transitioned via a first rounded corner (115); and / or, The second side wall (114) and the bottom wall (112) are transitioned via a second rounded corner (116).

6. The leaf spring assembly according to claim 5, characterized in that The radius of the first fillet (115) is R1, and R1 satisfies the relationship: 2 mm ≤ R1 ≤ 5 mm; and / or, The radius of the second rounded corner (116) is R2, and R2 satisfies the relationship: 2㎜≤R2≤5㎜.

7. The leaf spring assembly according to claim 4, characterized in that The first side wall (113) and the upper surface of the first leaf spring (11) are transitioned via a third fillet (117); and / or, The second side wall (114) and the upper surface of the second leaf spring (12) are transitioned via a fourth rounded corner (118).

8. The leaf spring assembly according to claim 7, characterized in that The radius of the third fillet (117) is R3, and R3 satisfies the relationship: 8 mm ≤ R3 ≤ 12 mm; and / or, The radius of the fourth rounded corner (118) is R4, and R4 satisfies the relationship: 8 mm ≤ R4 ≤ 12 mm.

9. A vehicle, characterized in that: include: The leaf spring assembly according to any one of claims 1 to 8; A balancing shaft assembly (30) comprises: a hub (31) and a balancing shaft bracket (32); the leaf spring assembly is fixedly connected to the hub (31); and the hub (31) and the balancing shaft bracket (32) are rotatably connected.

10. The vehicle according to claim 9, characterized in that The shaft hub (31) is provided with a groove, the leaf spring (10) is fitted in the groove, and the oblique U-shaped bolt (20) is connected to the shaft hub (31) after passing through the fitting groove (111).

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