Composite spring device

Abstract

The utility model discloses a composite spring device, which relates to the technical field of automobile suspensions, solves the problem that a spiral spring is easy to generate abnormal sound due to rigid contact, and comprises an upper tray and a lower tray, and the opposite sides of the upper tray and the lower tray are respectively provided with an annular accommodating groove; the number of the vibration isolation blocks is two, and the two vibration isolation blocks are arranged in the containing grooves in the upper tray and the lower tray respectively; the upper end and the lower end of the spring make contact with the two vibration isolation blocks respectively. Limiting grooves are formed in the opposite sides of the two vibration isolation blocks, and the upper end and the lower end of the spring are embedded in the limiting grooves in the two vibration isolation blocks respectively. According to the composite spring device, the upper end and the lower end of the spring are separated from the trays through the two vibration isolation blocks, so that the spring makes elastic contact with the trays, the vibration isolation blocks can weaken impact force, hard contact between the spiral spring and the upper tray and the lower tray is avoided, abnormal sound in the using process can be effectively eliminated, and the service life of the spiral spring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile suspension and automobile shock absorption, in particular to a composite spring device. Background Art

[0002] A coil spring is a mechanical component that utilizes elasticity to control movement, mitigate shock or vibration, store energy, and measure force. It is particularly widely used as an elastic element in vehicle suspension systems, including those for passenger cars and commercial vehicles. In a vehicle suspension, the lower end of a coil spring is mounted on a metal tray, while the upper end engages a tower, which is in turn connected to the vehicle body. When the impact of the road on the wheel is transmitted to the coil spring, it deforms, absorbing the wheel's kinetic energy and converting it into potential energy, thereby reducing the impact of the bumpy road on the vehicle body.

[0003] However, this structure places relatively high demands on the coil spring itself. During vehicle use, the coil spring itself has to face problems such as short fatigue life and abnormal noise at the upper and lower contact points. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and to design a composite spring device to solve the problem that the coil spring is prone to produce abnormal noise due to rigid contact.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is a composite spring device, comprising:

[0006] An upper tray and a lower tray, wherein opposite sides of the upper tray and the lower tray each have an annular receiving groove;

[0007] Vibration isolation blocks, two of which are respectively disposed in the receiving grooves on the upper tray and the lower tray;

[0008] A spring, wherein the upper and lower ends of the spring are respectively in contact with the two vibration isolation blocks.

[0009] Preferably, there is a through hole in the middle of the upper tray and the lower tray, the outer ring and the inner ring of the upper tray are bent downward and matched to form the accommodating groove, and the outer ring and the inner ring of the lower tray are bent upward and matched to form the accommodating groove.

[0010] The opposite sides of the two vibration isolation blocks are each provided with a limiting groove, and the upper and lower ends of the spring are respectively embedded in the limiting grooves on the two vibration isolation blocks.

[0011] Preferably, the limiting groove extends in a spiral shape.

[0012] Preferably, the spiral diameter of the limiting groove is adapted to the outer diameter of the spring.

[0013] Preferably, the cross-sectional diameter of the limiting groove is adapted to the cross-sectional diameter of the spring.

[0014] Preferably, the upper surface of the upper tray and the lower surface of the lower tray are both planes.

[0015] Preferably, the vibration isolation block is made of non-metallic material.

[0016] Preferably, the thickness of the vibration isolation block is smaller than the depth of the accommodating groove.

[0017] Preferably, a plurality of protrusions are provided at the opening of the accommodating groove or on the inner wall of the accommodating groove.

[0018] Compared with the prior art, the beneficial effects are:

[0019] The composite spring device in the present invention is composed of an upper tray, a spring, a lower tray and two vibration isolation blocks. The vibration isolation blocks are embedded in the receiving grooves on the opposite sides of the upper tray and the lower tray. The upper and lower ends of the spring are in contact with the two vibration isolation blocks respectively. When the lower tray moves upward under the impact of the axial force, the impact force is transmitted to the coil spring through the vibration isolation block, and the coil spring is in a compression trend. At the moment of vibration, the upper tray is regarded as stationary. The impact force weakened by the coil spring is then transmitted to the vibration isolation block at the bottom of the upper tray. The vibration isolation block will further weaken the impact force, avoiding hard contact between the coil spring and the upper and lower trays. It can effectively eliminate abnormal noise during use, reduce the instantaneous impact on the coil spring, and extend the service life of the coil spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional view of the composite spring device in Example 1;

[0021] Figure 2 is a schematic cross-sectional view of the composite spring device in Example 1 with the spring removed;

[0022] Figure 3 、 Figure 4 It is a schematic cross-sectional structural diagram of two configurations of the protrusions on the inner wall of the accommodating groove in Example 2.

[0023] In the figure, 1, upper tray; 2, vibration isolation block; 201, limit groove; 3, spring; 4, lower tray; 11, protrusion. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figure 1 As shown, a preferred embodiment of the present invention proposes a composite spring device, which mainly includes an upper tray 1, a lower tray 4, a coil spring 3 and two vibration isolation blocks 2, wherein the upper tray 1 and the lower tray 4 are parallel up and down, the coil spring 3 is located between the upper tray 1 and the lower tray 4, and the upper and lower ends of the coil spring 3 are separated from the upper tray 1 and the lower tray 4 by the vibration isolation blocks 2. The vibration isolation blocks 2 play a shock-absorbing role, avoiding hard contact between the coil spring 3 and the upper and lower trays 4, and can effectively eliminate abnormal noise during use.

[0027] The upper tray 1 and the lower tray 4 are both annular and have the same structure. A circular through hole is provided in the center of the upper tray 1 and the lower tray 4, the diameter of which is compatible with the diameter of the center circular hole of the coil spring 3.

[0028] refer to Figure 1 The upper surface of the upper tray 1 and the lower surface of the lower tray 4 are both flat, so that they can contact with the plane of other components and the force is more uniform.

[0029] like Figure 1 As shown, the inner and outer rings of the upper tray 1 bend vertically downward and cooperate to form an annular receiving groove. Similarly, the inner and outer rings of the lower tray 4 bend vertically upward and cooperate to form an annular receiving groove. The receiving grooves on both trays are identical in shape. The two vibration isolation blocks 2 are placed in the two receiving grooves, respectively, and the receiving grooves limit the position of the vibration isolation blocks 2.

[0030] The overall shape of the receiving groove is compatible with the overall shape of the vibration isolation block 2, so the vibration isolation block 2 can fit tightly with the receiving groove, and the vibration isolation block 2 can be fixed in the receiving groove by gluing.

[0031] In this embodiment, the opposing surfaces of the two isolation blocks 2 extend helically to mate with the upper and lower ends of the coil spring 3. The isolation blocks 2 maintain planar contact with the upper and lower trays 1 and 4, ensuring more uniform force distribution. The two isolation blocks 2 are bonded to the upper and lower ends of the coil spring 3 through vulcanization.

[0032] In this embodiment, there is a certain height difference between the surface of the isolation block 2 near the opening of the receiving slot and the ends of the hemming on both sides of the receiving slot. Generally, the thickness of the isolation block 2 is less than the depth of the receiving slot. Therefore, when the isolation block 2 is compressed and deformed, it pushes toward the sides, squeezing the inner walls of the receiving slot, thus forming the hemming on both sides. The bends of the hemming provide great strength. Because there is a certain height difference between the isolation block 2 and the opening of the receiving slot, the greater the distance between the isolation block 2 and the opening of the receiving slot, the less pressure is exerted on the opening of the receiving slot, and the less likely the hemming will deform.

[0033] In this embodiment, the vibration isolation block 2 is made of non-metallic material, such as rubber, and has a vibration filtering effect, avoiding hard contact between the coil spring 3 and the upper and lower trays 4, and can effectively eliminate abnormal noise during use.

[0034] During operation, the lower tray 4 is impacted by an axial force, causing it to move upward. This force is transmitted through the vibration isolation block 2 and to the coil spring 3, causing it to compress. At the moment of vibration, the upper tray 1 is considered stationary. The impact force, weakened by the coil spring 3, is then transmitted to the vibration isolation block 2 at the bottom of the upper tray 1. This weakened force is then transmitted to the upper tray 1, preventing hard contact between the coil spring 3 and the upper and lower trays 4, effectively eliminating any abnormal noise during use.

[0035] like Figure 2 As shown, in this embodiment, limiting grooves 201 are formed on opposing sides of both isolation blocks 2. These grooves 201 extend in a spiral shape, generally aligning with the extension trajectory of a single coil of the coil spring 3. Since the upper and lower ends of the coil spring 3 are of different heights and both are helical, the upper and lower ends of the coil spring 3 fit within the limiting grooves 201 on the two isolation blocks 2 to limit the position of the coil spring 3. The upper and lower ends of the coil spring 3 are bonded to the limiting grooves 201 by gluing.

[0036] It should be noted that the vulcanization bonding of the two vibration isolation blocks 2 and the coil spring 3 will also form a limiting groove 201 on the vibration isolation block 2, but the bonding methods of the coil spring 3 and the vibration isolation block 2 are different, one is vulcanization bonding and the other is gluing.

[0037] The diameter of the accommodating groove is consistent with the outer diameter of the coil spring 3, and the cross-sectional diameter of the accommodating groove is consistent with the cross-sectional diameter of the coil spring 3. In this way, the upper and lower ends of the coil spring 3 are completely matched with the limiting grooves 201 on the two vibration isolation blocks 2. The limiting grooves 201 can position the coil spring 3 to ensure that the coil spring 3 is coaxial with the upper tray 1 and the lower tray 4.

[0038] The retaining groove 201 extends in a spiral shape, aligning with the shape of the vibration isolation block 2. The side of the vibration isolation block 2 facing away from the retaining groove 201 is flat, allowing for planar contact between the upper tray 1 and the lower tray 4. The shape of the receiving groove also matches that of the vibration isolation block 2, saving material.

[0039] In this embodiment, the lower tray can be part of the vehicle's lower arm, and the upper tray can also be part of the vehicle body. Therefore, the modification cost is very low, the installation is relatively simple, and the cost of the suspension system is slightly increased.

[0040] Example 2

[0041] like Figure 3 As shown, the difference between this embodiment and the above embodiment is that in this embodiment, a plurality of protrusions 11 are provided at the opening of the receiving groove, and the protrusions are located on the inner wall of the opening of the receiving groove. The protrusions 11 can limit the vibration isolation block 2 and prevent the vibration isolation block 2 from falling out of the receiving groove.

[0042] Or as Figure 4 As shown, a plurality of protrusions 11 are provided on the inner wall of the receiving groove, and the plurality of protrusions are located on the inner wall where the receiving groove contacts the vibration isolation block 2. In this way, after the vibration isolation block 2 is embedded in the receiving groove, under the action of the protrusions 11, the vibration isolation block 2 can be interference fit with the upper tray 1 and the lower tray 4, and can also prevent the vibration isolation block 2 from leaving the receiving groove.

[0043] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. A composite spring device, characterized in that: include: An upper tray (1) and a lower tray (4), wherein opposite sides of the upper tray (1) and the lower tray (4) are each provided with an annular receiving groove; Vibration isolation blocks (2), wherein two vibration isolation blocks (2) are provided and are respectively arranged in receiving grooves on the upper tray (1) and the lower tray (4); A spring (3), wherein the upper and lower ends of the spring (3) are in contact with the two vibration isolation blocks (2) respectively.

2. The composite spring device according to claim 1, characterized in that: There is a through hole in the middle of the upper tray (1) and the lower tray (4); the outer ring and the inner ring of the upper tray (1) are bent downward and matched to form the receiving groove; the outer ring and the inner ring of the lower tray (4) are bent upward and matched to form the receiving groove.

3. The composite spring device according to claim 1, wherein: The opposite sides of the two vibration isolation blocks (2) are each provided with a limiting groove (201), and the upper and lower ends of the spring (3) are respectively embedded in the limiting grooves (201) on the two vibration isolation blocks (2).

4. The composite spring device according to claim 3, characterized in that: The limiting groove (201) extends in a spiral shape.

5. The composite spring device according to claim 4, characterized in that: The spiral diameter of the limiting groove (201) is adapted to the outer diameter of the spring (3).

6. The composite spring device according to claim 5, characterized in that: The cross-sectional diameter of the limiting groove (201) is adapted to the cross-sectional diameter of the spring (3).

7. The composite spring device according to claim 1, wherein: The upper surface of the upper tray (1) and the lower surface of the lower tray (4) are both planes.

8. The composite spring device according to claim 1, wherein: The vibration isolation block (2) is made of non-metallic material.

9. The composite spring device according to claim 1, wherein: The thickness of the vibration isolation block (2) is smaller than the depth of the accommodating groove.

10. The composite spring device according to claim 1, wherein: A plurality of protrusions (11) are provided at the opening of the accommodating groove or on the inner wall of the accommodating groove.

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