New energy vehicle clamp-free steel plate spring

Abstract

The utility model discloses a new energy vehicle clamp-free steel plate spring which comprises a main spring and an auxiliary spring, through holes are formed in the surfaces of the main spring and the auxiliary spring, center bolts for fixing the main spring and the auxiliary spring are installed in the through holes, and limiting clamping plates are fixedly installed on the front sides and the rear sides of the main spring and the auxiliary spring. The face, close to the center bolt, of the limiting clamping plate is fixedly connected with a first silencing pad, the upper end of the limiting clamping plate is lower than the upper surface of the main spring, and the lower end of the limiting clamping plate is lower than the lower surface of the auxiliary spring. The limiting clamping plate is arranged, the upper side face of the limiting clamping plate makes contact with the side face of the main spring so that the main spring can be prevented from inclining around the center bolt point, and the lower side face of the limiting clamping plate makes contact with the side face of the auxiliary spring so that the auxiliary spring can be prevented from inclining around the center bolt point. Contact friction between the main spring and the auxiliary spring and the side face of the hoop is effectively avoided, the root of abnormal sound is eliminated, noise can be effectively eliminated in cooperation with the first silencing pad, and therefore the performance of the whole automobile is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of leaf springs, in particular to a clamp-free leaf spring for new energy vehicles. Background Art

[0002] New energy vehicles require quietness and stability during driving. The rear suspension of new energy vehicles is a gradient steel leaf spring, which can well meet the different stiffness requirements in empty and fully loaded states. In order to ensure the alignment of the auxiliary spring and the main spring, and to prevent the auxiliary spring from tilting with the center bolt as the origin, it is necessary to add a clamp to the end of the auxiliary spring to limit it. For details, see Figure 1 .

[0003] However, when the car is running, the main spring and the auxiliary spring will come into contact and rub against the side of the clamp, causing abnormal noise. This will not only generate noise but also affect the performance of the entire vehicle, so it needs to be improved. Summary of the Invention

[0004] The purpose of the present utility model is to provide a clamp-free leaf spring for new energy vehicles to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamp-free leaf spring for new energy vehicles, comprising a main spring and a secondary spring, wherein the surfaces of the main spring and the secondary spring are provided with through holes, and central bolts for fixing the main spring and the secondary spring are installed in the through holes, and limiting clamps are fixedly installed on the front and rear sides of the main spring and the secondary spring, and a first silencer pad is fixedly connected to the side of the limiting clamp facing the central bolt, and the upper end of the limiting clamp is lower than the upper surface of the main spring, and the lower end of the limiting clamp is lower than the lower surface of the secondary spring.

[0006] Preferably, both ends of the main spring are provided with flat ears.

[0007] Preferably, a connecting plate is provided on the lower surface of the auxiliary spring, a through hole is opened on the surface of the connecting plate, and a central bolt passes through the through hole, and both ends of the connecting plate are fixedly connected to the limiting clamping plate respectively, and the limiting clamping plate is perpendicular to the connecting plate.

[0008] Preferably, the limiting clamping plate and the connecting plate are an integrally formed structure.

[0009] Preferably, the upper and lower surfaces of the main spring are fixedly connected to the second sound-absorbing pad, and the upper and lower surfaces of the auxiliary spring are fixedly connected to the third sound-absorbing pad.

[0010] Preferably, four positioning holes are provided on the lower surface of the main spring, and four positioning pins are fixedly connected to the upper surface of the auxiliary spring, and the positioning pins and the positioning holes fit together.

[0011] Preferably, two strip grooves are provided on the lower surface of the auxiliary spring, and two positioning plates are fixedly connected to the surface of the connecting plate, and the positioning plates and the strip grooves fit together. Beneficial effects

[0012] The utility model provides a clamp-free leaf spring for new energy vehicles, which has the following beneficial effects:

[0013] 1. This clamp-free leaf spring for new energy vehicles utilizes a limiter plate. The upper side of the limiter plate contacts the side of the main spring, limiting deflection of the main spring around the center bolt point. The lower side of the limiter plate contacts the side of the secondary spring, limiting deflection around the center bolt point. This ensures that the main and secondary springs form a single unit. Compared to existing technologies, the elimination of the clamp effectively prevents contact and friction between the main and secondary springs and the side of the clamp, eliminating the source of abnormal noise. Combined with the first muffler pad, this effectively reduces noise, thereby improving overall vehicle performance.

[0014] 2. This clamp-free leaf spring for new energy vehicles utilizes a connecting plate and two limiting clamps, which can be formed by bending steel plates. Compared to existing technologies, this eliminates the need for clamps, simplifies the product structure, and reduces costs.

[0015] 3. This clamp-free leaf spring for new energy vehicles features positioning holes, positioning pins, strip grooves, and positioning plates. The alignment of the positioning pins with the positioning holes strengthens the connection between the main and auxiliary springs, while the alignment of the positioning plates with the strip grooves enhances the connection between the connecting plate and the auxiliary spring, further preventing the main and auxiliary springs from tilting around the center bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a leaf spring for new energy vehicles in the prior art;

[0017] Figure 2 This is a front view structural diagram of a clamp-free leaf spring for new energy vehicles proposed in the utility model;

[0018] Figure 3 This is a schematic diagram of the front cross-section structure of a clamp-free leaf spring for new energy vehicles proposed in the utility model;

[0019] Figure 4 This is a right-side cross-sectional structural diagram of a clamp-free leaf spring for new energy vehicles proposed in the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of a limit clamping plate and a connecting plate of a clamp-free leaf spring for a new energy vehicle proposed in the utility model.

[0021] In the figure: 1. Main spring; 2. Auxiliary spring; 3. Center bolt; 4. Limiting clamp; 5. First silencer pad; 6. Flat ear; 7. Connecting plate; 8. Second silencer pad; 9. Third silencer pad; 10. Positioning hole; 11. Positioning pin; 12. Strip groove; 13. Positioning plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 2-5 The utility model provides a technical solution: a clamp-free leaf spring for new energy vehicles, comprising a main spring 1 and a secondary spring 2. Through holes are provided on the surfaces of the main spring 1 and the secondary spring 2. A central bolt 3 for fixing the main spring 1 and the secondary spring 2 is installed in the through hole. A limiting card plate 4 is fixedly installed on the front and rear sides of the main spring 1 and the secondary spring 2. A first silencer pad 5 is fixedly connected to the side of the limiting card plate 4 that is close to the central bolt 3, and the upper end of the limiting card plate 4 is lower than the upper surface of the main spring 1, and the lower end of the limiting card plate 4 is lower than the lower surface of the secondary spring 2. By setting a limit The limiting clamp plate 4 is used to contact the side of the main spring 1 with the upper side of the limiting clamp plate 4, so as to limit the main spring 1 from tilting at 3 points around the center bolt. The limiting clamp plate 4 is used to contact the side of the auxiliary spring 2 with the lower side of the limiting clamp plate 4, so as to limit the auxiliary spring 2 from tilting at 3 points around the center bolt. In this way, the main spring 1 and the auxiliary spring 2 can be ensured to form a whole. Compared with the existing technology, by abandoning the clamp parts, the contact and friction between the main spring 1 and the auxiliary spring 2 and the side of the clamp can be effectively avoided, and the source of abnormal noise is eliminated. In combination with the first silencer pad 5, the noise can be effectively eliminated, thereby improving the performance of the entire vehicle.

[0024] Both ends of the main spring 1 are provided with flat ears 6, and the lower surface of the auxiliary spring 2 is provided with a connecting plate 7. A through hole is opened on the surface of the connecting plate 7, and the center bolt 3 passes through the through hole. The two ends of the connecting plate 7 are respectively fixedly connected to the limiting clamping plate 4, and the limiting clamping plate 4 is perpendicular to the connecting plate 7. The limiting clamping plate 4 and the connecting plate 7 are an integrally formed structure. By setting the connecting plate 7 and two limiting clamping plates 4, the structure can be formed by bending the steel plate. Compared with the existing technology, the part clamp is discarded, the product structure is simplified, and the cost is saved.

[0025] The upper and lower surfaces of the main spring 1 are fixedly connected with a second silencer pad 8, and the upper and lower surfaces of the auxiliary spring 2 are fixedly connected with a third silencer pad 9. By providing the second silencer pad 8 and the third silencer pad 9, the noise caused by friction between the main spring 1 and the auxiliary spring 2, as well as the noise caused by friction between the auxiliary spring 2 and the connecting plate 7 can be effectively avoided.

[0026] Four positioning holes 10 are provided on the lower surface of the main spring 1, and four positioning pins 11 are fixedly connected to the upper surface of the auxiliary spring 2, and the positioning pins 11 and the positioning holes 10 fit together. Two strip grooves 12 are provided on the lower surface of the auxiliary spring 2, and two positioning plates 13 are fixedly connected to the surface of the connecting plate 7, and the positioning plates 13 and the strip grooves 12 fit together. By setting the positioning holes 10, positioning pins 11, strip grooves 12 and positioning plates 13, and utilizing the mutual fit between the positioning pins 11 and the positioning holes 10, the connection firmness between the main spring 1 and the auxiliary spring 2 can be improved, and by utilizing the mutual fit between the positioning plates 13 and the strip grooves 12, the connection firmness between the connecting plate 7 and the auxiliary spring 2 can be improved, thereby further preventing the main spring 1 and the auxiliary spring 2 from tilting around the center bolt 3.

[0027] When the clamp-free leaf spring of the new energy vehicle is being installed: first, the main spring 1 is placed on the upper surface of the auxiliary spring 2, so that the locating pin 11 and the locating hole 10 fit together, and then the auxiliary spring 2 is placed on the surface of the connecting plate 7, so that the locating plate 13 and the strip groove 12 fit together, and then the center bolt 3 is used to fix the main spring 1, the auxiliary spring 2 and the connecting plate 7, so that the limiting clamp 4 can be fixed, and the limiting clamp 4 is used to limit the main spring 1 and the auxiliary spring 2, so that the main spring 1 and the auxiliary spring 2 can be limited and fixed, and at the same time, they can be prevented from being skewed. By discarding the clamp parts, the contact and friction between the main spring 1 and the auxiliary spring 2 and the side of the clamp is effectively avoided, and the source of the abnormal noise is eliminated. In combination with the first silencer pad 5, the noise can be effectively eliminated, thereby improving the performance of the entire vehicle.

[0028] The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention may be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clamp-free leaf spring for a new energy vehicle, comprising a main spring (1) and a secondary spring (2), characterized in that: The surfaces of the main spring (1) and the auxiliary spring (2) are both provided with through holes, and a central bolt (3) for fixing the main spring (1) and the auxiliary spring (2) is installed in the through hole. A limiting clamping plate (4) is fixedly installed on the front and rear sides of the main spring (1) and the auxiliary spring (2). A first sound-absorbing pad (5) is fixedly connected to the side of the limiting clamping plate (4) facing the central bolt (3), and the upper end of the limiting clamping plate (4) is lower than the upper surface of the main spring (1), and the lower end of the limiting clamping plate (4) is lower than the lower surface of the auxiliary spring (2).

2. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: Both ends of the main spring (1) are provided with flat coil ears (6).

3. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: A connecting plate (7) is provided on the lower surface of the auxiliary spring (2), a through hole is provided on the surface of the connecting plate (7), and a central bolt (3) passes through the through hole, and both ends of the connecting plate (7) are fixedly connected to the limiting clamping plate (4), and the limiting clamping plate (4) is perpendicular to the connecting plate (7).

4. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: The position-limiting clamping plate (4) and the connecting plate (7) are an integrally formed structure.

5. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: The upper and lower surfaces of the main spring (1) are both fixedly connected to a second sound-absorbing pad (8), and the upper and lower surfaces of the auxiliary spring (2) are both fixedly connected to a third sound-absorbing pad (9).

6. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: The lower surface of the main spring (1) is provided with four positioning holes (10), and the upper surface of the auxiliary spring (2) is fixedly connected with four positioning pins (11), and the positioning pins (11) and the positioning holes (10) fit together.

7. The clamp-free leaf spring for new energy vehicles according to claim 1, characterized in that: Two strip grooves (12) are formed on the lower surface of the auxiliary spring (2), and two positioning plates (13) are fixedly connected to the surface of the connecting plate (7), and the positioning plates (13) and the strip grooves (12) fit together.

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