Double-cone multi-stage variable-rigidity damping device

Abstract

The utility model relates to a double-cone multi-stage variable-rigidity damping device, belongs to the technical field of damping devices, and solves the problem that a damping device in the prior art generates large abnormal sound. The device comprises a buffer and a spring sleeved outside the buffer, two ends of the buffer are respectively provided with an upper baffle plate and a lower baffle plate, two ends of the spring are respectively abutted against the upper baffle plate and the lower baffle plate, and the spring is in a double-cone shape; according to the scheme, the springs are connected outside the buffers in a sleeving mode for common shock absorption, due to the special structure of the double-cone-shaped springs, the effect of multi-level rigidity can be achieved, the shock absorption and noise reduction effects are improved, the device can meet the vehicle shock absorption requirements of all weather and all road conditions, the shock absorber and a cab are prevented from being damaged, and the service life of the shock absorber is prolonged. And the service lives of the piston and the oil seal of the shock absorber are prolonged, and the comfort of a driver is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorption devices, and particularly relates to a double-cone multi-stage variable stiffness shock absorption device. Background Art

[0002] During the driving of a vehicle on different road surfaces, especially on rough roads, the vibration caused by the uneven road surface will be transmitted to the cab, reducing the comfort of the passengers and even making them uncomfortable. Although the flat-floating or full-floating cab mounts are gradually adopted in commercial vehicles in China, due to the use of a first-stage stiffness shock absorption mechanism such as a common damping spring or a common spring for shock absorption, the following defects exist: Since there is only one stiffness design in the first-stage stiffness shock absorption mechanism, it cannot meet the shock absorption requirements of the vehicle under all road conditions. For example, when the stiffness design of the first-stage stiffness shock absorption mechanism is small, the vehicle cannot only prevent the vibration caused by the road surface from being transmitted to the cab, but also the excessive vibration will exceed the shock absorption limit of the first-stage stiffness shock absorption mechanism, resulting in hard contact with the cab, causing damage to the shock absorption mechanism, and even tearing the cab in extreme cases. On the contrary, when the stiffness design of the first-stage stiffness shock absorption mechanism is large, although it can avoid the cab vibration caused by rough roads, it cannot meet the shock absorption requirements under good road conditions, reducing the comfort of the passengers.

[0003] Under this background, the company developed a second-stage stiffness shock absorber, a front body mount and a rear body mount disclosed in the patent application No. ZL2021206011058. Subsequently, it was found that some abnormal noises would occur in some scenarios during the use of this shock absorber, so it was improved again, and this solution was generated based on this. Summary of the Utility Model

[0004] Based on the above description, the utility model provides a double-cone multi-stage variable stiffness shock absorption device to solve the deficiencies of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A double-cone multi-stage variable stiffness shock absorption device includes a buffer and a spring sleeved outside it. Upper and lower baffles are respectively arranged at both ends of the buffer, and both ends of the spring are respectively abutted against the upper and lower baffles. The spring is spindle-shaped.

[0007] On the basis of the above technical solution, the utility model can be further improved as follows.

[0008] Further, the pitch of the spring continuously decreases from the middle to both ends.

[0009] Further, the pitches at both ends of the spring are symmetrical about the middle.

[0010] Furthermore, the buffer includes an upper sleeve and a lower sleeve that are plug-fitted together, the upper sleeve is provided with a piston rod at both ends that respectively penetrate the top of the upper sleeve and the lower sleeve, the lower sleeve is provided with a piston head connected to the piston rod, the lower sleeve is filled with oil, the piston head is provided with an extension valve and a circulation valve, and the bottom of the lower sleeve is provided with a compression valve and a compensation valve.

[0011] Furthermore, the compression valve is located directly below the extension valve, and the compensation valve is located directly below the flow valve.

[0012] Furthermore, the top of the upper sleeve is connected to an upper joint, the upper baffle is sleeved on the upper joint, the bottom of the lower sleeve is connected to a lower joint, and the lower baffle is sleeved on the lower joint.

[0013] Furthermore, an upper ring that is engaged with the spring is disposed at the bottom of the upper baffle plate, and a lower ring that is engaged with the spring is disposed at the top of the lower baffle plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] This solution uses a spring sleeved on the outside of the buffer for joint shock absorption, and the spindle-shaped spring can play a role of multi-level stiffness due to its special structure, thereby improving the shock absorption and noise reduction effects. This device can meet the shock absorption needs of vehicles in all weather and all road conditions, prevent damage to the shock absorber and the cab, and increase the service life of the shock absorber piston and oil seal, as well as the comfort of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a double-cone multi-stage variable stiffness shock absorbing device provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 The front view after the spring is hidden;

[0018] Figure 3 is a schematic diagram of the internal structure of the buffer;

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Spring; 2. Upper sleeve; 3. Lower sleeve; 4. Upper baffle; 5. Lower baffle; 6. Piston rod; 7. Piston head; 8. Extension valve; 9. Flow valve; 10. Compression valve; 11. Compensation valve; 12. Upper joint; 13. Lower joint; 14. Upper ring; 15. Lower ring. DETAILED DESCRIPTION

[0021] To facilitate the understanding of this application, the following will provide a more comprehensive description of this application with reference to the relevant attached drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0023] It can be understood that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawing is flipped, an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial description terms used herein are accordingly interpreted.

[0024] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transmission between the connected circuits, modules, units, etc., should be understood as "electrically connected", "communicatively connected", etc.

[0025] As used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0026] As Figures 1-3 shown, a double-cone multi-stage variable stiffness shock absorber includes a buffer and a spring 1 sleeved outside it. Upper and lower baffles 4 and 5 are respectively arranged at both ends of the buffer. Both ends of the spring 1 are respectively abutted against the upper baffle 4 and the lower baffle 5. The spring 1 is spindle-shaped, that is, it becomes thinner from the middle to both sides.

[0027] The diameter of the spring 1 is directly related to its buffering effect. The larger the diameter of the spring 1, the more energy it can store, so it can provide greater resistance when absorbing shock and vibration, effectively reducing the impact of impact and vibration on the system. Therefore, compared with the ordinary spring 1, this structure improves the shock absorption and noise reduction effects.

[0028] Preferably, the pitch of the spring 1 decreases continuously from the middle to the two ends. This improved design can increase the elastic force at the two ends of the spring 1, shorten the elastic force gap with the middle of the spring 1 with a large diameter, and reduce the stroke of the spring 1 at both ends, so that its stiffness changes continuously. The friction and impact generated by the connection between the two ends of the spring 1 and the buffer are the main sources of abnormal noise, and the changing spring stiffness can improve the abnormal noise problem. Accordingly, the pitch of the two ends of the spring 1 is symmetrical about the middle.

[0029] The buffer includes an upper sleeve 2 and a lower sleeve 3 that are plugged together. The upper sleeve 2 is provided with a piston rod 6 with two ends passing through the top of the upper sleeve 2 and the top of the lower sleeve 3 respectively. The lower sleeve 3 is provided with a piston head 7 connected to the piston rod 6. The lower sleeve 3 is filled with oil. The piston head 7 is provided with an extension valve 8 and a circulation valve 9. The bottom of the lower sleeve 3 is provided with a compression valve 10 and a compensation valve 11. The compression valve 10 is located directly below the extension valve 8, and the compensation valve 11 is located directly below the circulation valve 9.

[0030] In the utility model, with the excitation from the road surface, the stiffness of the spring 1 changes differently, prompting the compression valve 10, the extension valve 8, the compensation valve 11 and the flow valve 9 to change the medium flow value in the buffer according to the change of the stiffness of the excitation, so that the damping changes, thereby improving the shock absorption effect of the vehicle and equipment.

[0031] The top of the upper sleeve 2 is connected with an upper joint 12, the upper baffle 4 is sleeved on the upper joint 12, the bottom of the lower sleeve 3 is connected with a lower joint 13, and the lower baffle 5 is sleeved on the lower joint 13. The bottom of the upper baffle 4 is provided with an upper ring 14 that is snap-fitted with the spring 1, and the top of the lower baffle 5 is provided with a lower ring 15 that is snap-fitted with the spring 1.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-cone multi-stage variable stiffness shock absorbing device, characterized in that: The invention comprises a buffer and a spring (1) sleeved on the outside thereof, wherein an upper baffle (4) and a lower baffle (5) are respectively arranged at two ends of the buffer, and two ends of the spring (1) are respectively in contact with the upper baffle (4) and the lower baffle (5), and the spring (1) is in a double cone shape.

2. A double-cone multi-stage variable stiffness shock absorbing device according to claim 1, characterized in that: The pitch of the spring (1) decreases continuously from the middle to both ends.

3. A double-cone multi-stage variable stiffness shock absorbing device according to claim 2, characterized in that: The pitches of the two ends of the spring (1) are symmetrical about the middle.

4. A double-cone multi-stage variable stiffness shock absorbing device according to claim 1, characterized in that: The buffer comprises an upper sleeve (2) and a lower sleeve (3) which are plug-fitted together. The upper sleeve (2) is provided with a piston rod (6) at both ends of which pass through the top of the upper sleeve (2) and the top of the lower sleeve (3) respectively. The lower sleeve (3) is provided with a piston head (7) connected to the piston rod (6). The lower sleeve (3) is filled with oil. The piston head (7) is provided with an extension valve (8) and a circulation valve (9). The bottom of the lower sleeve (3) is provided with a compression valve (10) and a compensation valve (11).

5. A double-cone multi-stage variable stiffness shock absorbing device according to claim 4, characterized in that: The compression valve (10) is located directly below the extension valve (8), and the compensation valve (11) is located directly below the circulation valve (9).

6. A double-cone multi-stage variable stiffness shock absorbing device according to claim 4, characterized in that: The top of the upper sleeve (2) is connected to an upper joint (12), the upper baffle (4) is sleeved on the upper joint (12), the bottom of the lower sleeve (3) is connected to a lower joint (13), and the lower baffle (5) is sleeved on the lower joint (13).

7. A double-cone multi-stage variable stiffness shock absorbing device according to claim 1, characterized in that: An upper ring (14) is provided at the bottom of the upper baffle plate (4) and is engaged with the spring (1), and a lower ring (15) is provided at the top of the lower baffle plate (5) and is engaged with the spring (1).

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