CN117189820A

CN117189820A - Multistage combination spring

Info

Publication number: CN117189820A
Application number: CN202311207299.3A
Authority: CN
Inventors: 郝祥新
Original assignee: Hefei Shenhui Spring Co ltd
Current assignee: Hefei Shenhui Spring Co ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2023-12-08

Abstract

The invention is suitable for the technical field of springs, and provides a multistage combined spring which comprises an inner sleeve, a supporting disc and an outer sleeve, wherein a buffer cavity is formed between the inner sleeve and the outer sleeve, a fixed end cover is fixed at one end of the outer sleeve, an inner spring is arranged in the buffer cavity, an exhaust hole is formed at one end of the outer sleeve, a guide pipe penetrates through the fixed end cover, and a piston ring is fixed at one end of the guide pipe. According to the invention, the inner spring is arranged in the buffer cavity, the outer spring is arranged outside the outer sleeve, the spring stiffness of the outer spring is larger than that of the inner spring, the impact force borne by the guide pipe firstly acts on the inner spring, and when the impact force is larger than the energy storage value set by the inner spring, the redundant impact force is transferred to the outer spring through the combination of the fixing seat, the guide rod, the compression ring and the guide pipe, so that the single spring is prevented from bearing impact, the load capacity of the combined spring is improved, and meanwhile, the fatigue damage of the single spring caused by excessive impact is avoided, so that the service life of the combined spring is prolonged.

Description

Multistage combination spring

Technical Field

The invention relates to the technical field of springs, in particular to a multistage combined spring.

Background

A spring is a mechanical part that works with elasticity. Parts made of elastic materials deform under the action of external force, and recover after the external force is removed. Compression springs are one of many springs, and the compression springs (compression springs) are coil springs that bear axial pressure, and are generally classified into equal-pitch springs and variable-pitch springs, and the compression springs have the following shapes: cylindrical, conical, convex and concave, a small amount of non-circular, etc., there is a certain gap between the rings of the compression spring, and when an external load is applied, the spring contracts and deforms, storing deformation energy. Compression springs are often used in automobile shock absorbers to improve the shock absorption effect of the shock absorbers, but most of existing springs are independently installed in the automobile shock absorbers, the effect of the springs is limited due to the properties of the springs, the single springs tend to be softer or harder when absorbing impact, and after the springs are specifically installed on an automobile, the smoothness and the comfort of running of the automobile are often affected. Excessive impact acts on a single spring, so that metal fatigue of the spring is easy to occur, the spring stiffness is changed, and the spring is damaged due to multiple impacts, so that the service life of the spring is reduced.

Therefore, in view of the above, the application proposes a multi-stage combination spring that is used as a single spring by combining two springs having different spring rates to be installed in an integrated structure in an automobile shock absorber, so as to change the structural disadvantage of a single spring.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide a multi-stage combined spring.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a multistage combined spring, which comprises an inner sleeve and an outer sleeve fixed outside the inner sleeve through a supporting disc, wherein a buffer cavity is formed between the inner sleeve and the outer sleeve, one end of the outer sleeve is fixedly provided with a fixed end cover, the inner spring is arranged in the buffer cavity, one end of the outer sleeve is provided with an exhaust hole communicated with the buffer cavity, a guide pipe matched with the inner sleeve penetrates through the fixed end cover, and one end of the guide pipe positioned in the buffer cavity is fixedly provided with a piston ring matched with the buffer cavity.

A fixed seat is fixed at one end of the catheter, which is positioned outside the buffer cavity, a guide rod is fixed on the fixed seat, a compression ring sleeved outside the outer sleeve is fixed at one end of the guide rod, which is far away from the fixed seat, and an outer spring matched with the compression ring is sleeved on the outer sleeve; one end of the outer sleeve, provided with the exhaust hole, is fixed with a pressure relief structure communicated with the buffer cavity.

As a preferable technical scheme of the invention, one ends of the inner sleeve and the outer sleeve are fixedly connected into a whole through the supporting disc, the other ends of the inner sleeve and the outer sleeve are in an opening shape communicated with the buffer cavity, and the guide tube is sleeved outside the inner sleeve and is in sliding connection with the inner sleeve.

As a preferable technical scheme of the invention, the outer sleeve is sleeved with the limiting ring, the limiting ring is positioned between the outer spring and the compression ring, one end of the outer spring is abutted against the supporting disc, and the other end of the outer spring is abutted against the limiting ring.

As a preferable technical scheme of the invention, the pressure relief structure comprises a pressure relief seat fixed on a supporting plate through bolts, a through hole matched with an inner cavity of an inner sleeve is formed at the center of the pressure relief seat, a pressure relief hole matched with an exhaust hole is formed at one end surface of the pressure relief seat, which is close to the supporting plate, an adjusting hole communicated with the pressure relief hole is formed at the other end surface of the pressure relief seat, and an adjusting block is connected in the adjusting hole in a threaded manner; the one end that the pressure release hole is close to the exhaust hole is filled with and is had the relief plug with exhaust hole complex, install the pressure release spring that extends to the pressure release downthehole in the regulation hole, pressure release spring one end supports tightly on the pressure release plug, the pressure release spring other end supports tightly on the regulating block, set up the gas outlet tank with the pressure release hole intercommunication on the pressure release seat outer disc, the regulating block is kept away from the terminal surface of pressure release spring and has been seted up the regulating tank.

As a preferable technical scheme of the invention, the fixing seat comprises a fixing sleeve matched with the catheter, one end of the fixing sleeve is penetrated through and tightly abutted against the outer circular surface of the catheter, the outer circular surface of one end of the fixing sleeve is fixedly provided with a supporting plate, and the guide rod penetrates through the supporting plate and is fixed on the supporting plate through a nut.

As a preferable technical scheme of the invention, the limiting ring comprises two arc plates fixedly connected together through bolts, wherein one arc plate is fixedly connected with the outer spring, and arc guide sleeves matched with the outer sleeve are fixed on two end surfaces of the arc plate.

As a preferable technical scheme of the invention, one end face of the piston ring, which is far away from the guide pipe, is abutted against an inner spring, and the other end of the inner spring is abutted against a supporting disc positioned in the buffer cavity.

The invention has the advantages that:

1. according to the invention, the inner spring is arranged in the buffer cavity, the outer spring is arranged outside the outer sleeve, the spring stiffness of the outer spring is larger than that of the inner spring, the impact force born by the guide pipe firstly acts on the inner spring when the buffer cavity is used, and when the impact force is larger than the energy storage value set by the inner spring, the redundant impact force is transferred to the outer spring through the combination of the fixing seat, the guide rod, the compression ring and the guide pipe, so that the single spring is prevented from bearing impact, the load capacity of the combined spring is improved, and meanwhile, fatigue damage to the single spring caused by excessive impact is avoided, so that the service life of the combined spring is prolonged.

2. According to the invention, the exhaust hole communicated with the buffer cavity is formed in the support disc, the pressure release structure corresponding to the exhaust hole is arranged at one end of the support disc, when the guide pipe is impacted, the piston ring presses the inner spring and simultaneously compresses air in the buffer cavity, the external impact force is absorbed doubly, the absorption of the inner spring on the impact is enhanced from the inside, and part of impact conversion pressure is discharged out of the buffer cavity through the exhaust hole, so that the shock absorption and impact resistance of the combined spring is further improved.

3. According to the invention, the pressure release plug and the pressure release spring are arranged in the pressure release hole, so that the pressure of the gas in the buffer cavity during discharge can be adjusted, and the impact absorption capacity of the inner spring and the buffer cavity during combined action is improved; in addition, the pressure value when the gas in the buffer cavity is discharged can be adjusted according to the requirement by the adjusting block, so that the absorption value of the combined spring is more adjustable and controllable.

Drawings

FIG. 1 is a schematic view of a multi-stage combination spring according to the present invention.

Fig. 2 is a schematic structural view of another view of the present invention.

Fig. 3 is a schematic cross-sectional structure of the present invention.

Fig. 4 is a schematic structural diagram of the pressure relief structure of the present invention.

Fig. 5 is a schematic view of a pressure relief structure at another view angle.

Fig. 6 is a schematic cross-sectional view of a pressure relief structure.

Fig. 7 is a schematic structural diagram of the fixed end cover, the fixed seat, the guide rod and the compression ring.

Fig. 8 is a schematic structural view of the outer sleeve, the support plate, and the exhaust holes.

Fig. 9 is a schematic structural view of the inner sleeve, outer sleeve and support plate.

Fig. 10 is a schematic structural diagram of the fixing base.

Fig. 11 is a schematic structural view of the stop collar.

In the accompanying drawings: 1. an inner sleeve; 2. an outer sleeve; 3. a support plate; 4. a buffer cavity; 5. fixing the end cover; 6. an inner spring; 7. an exhaust hole; 8. a conduit; 9. piston rings;

10. a fixing seat; 1001. a fixed sleeve; 1002. a fastening bolt; 1003. a support plate;

11. a guide rod; 12. a compression ring; 13. an outer spring;

14. a pressure relief structure; 1401. a pressure relief seat; 1402. a through hole; 1403. a pressure relief hole; 1404. an adjustment aperture; 1405. an adjusting block; 1406. a pressure relief plug; 1407. a pressure relief spring; 1408. an air outlet groove; 1409. an adjustment tank;

15. and a limiting ring.

Detailed Description

In the present invention, unless otherwise indicated, the terms "upper" and "lower" are used generally with respect to the directions shown in the drawings, or with respect to the vertical, vertical or gravitational directions; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present invention.

First embodiment:

referring to fig. 1-11, the present invention provides the following technical solutions:

the multistage combined spring comprises an inner sleeve 1 and an outer sleeve 2 fixed outside the inner sleeve 1 through a supporting disc 3, a buffer cavity 4 is formed between the inner sleeve 1 and the outer sleeve 2, a fixed end cover 5 is fixed at one end of the outer sleeve 2, an inner spring 6 is arranged inside the buffer cavity 4, an exhaust hole 7 communicated with the buffer cavity 4 is formed at one end of the outer sleeve 2, a guide pipe 8 matched with the inner sleeve 1 penetrates through the fixed end cover 5, and a piston ring 9 matched with the buffer cavity 4 is fixed at one end of the guide pipe 8 positioned inside the buffer cavity 4; an end surface of the piston ring 9, which is far away from the guide pipe 8, is abutted against the inner spring 6; the other end of the inner spring 6 abuts against the support disc 3 positioned inside the buffer cavity 4. The spring rate of the inner spring 6 is smaller than the spring rate of the outer spring 13, so that the outer spring 13 can absorb a large impact force.

The one end that pipe 8 is located the outside of buffering cavity 4 is fixed with fixing base 10, is fixed with guide arm 11 on the fixing base 10, and the one end that guide arm 11 kept away from fixing base 10 is fixed with the cover and establishes the clamping ring 12 outside outer tube 2, and the cover is equipped with outer spring 13 with clamping ring 12 complex on the outer tube 2. The length of the outer spring 13 is smaller than that of the inner spring 6, and the acting force firstly acts on the inner spring 6 when the impact is received

One end of the inner sleeve 1 and one end of the outer sleeve 2 are fixedly connected into a whole through the supporting disc 3, the other ends of the inner sleeve 1 and the outer sleeve 2 are in an opening shape communicated with the buffer cavity 4, and the guide pipe 8 is sleeved outside the inner sleeve 1 and is in sliding connection with the inner sleeve 1.

The outer sleeve 2 is sleeved with a limiting ring 15, the limiting ring 15 is positioned between the outer spring 13 and the compression ring 12, one end of the outer spring 13 is abutted against the supporting disc 3, and the other end of the outer spring 13 is abutted against the limiting ring 15.

The fixing base 10 comprises a fixing sleeve 1001 matched with the catheter 8, one end of the fixing sleeve 1001 is tightly abutted against a fastening bolt 1002 on the outer circular surface of the catheter 8, a supporting plate 1003 is fixed on the outer circular surface of one end of the fixing sleeve 1001, and the guide rod 11 penetrates through the supporting plate 1003 and is fixed on the supporting plate 1003 through a nut.

The working principle of the multistage combination spring provided by the invention is as follows:

working principle: the conduit 8 is subjected to pressure to shrink inwards the buffer cavity 4, the piston ring 9 fixed at one end of the conduit 8 extrudes the inner spring 6, the inner spring 6 absorbs impact force and converts the impact force into elastic potential energy of the inner spring 6, when the impact force received is large, the pressure received by the conduit 8 is also larger, meanwhile, the amount of the conduit 8 shrinking inwards the buffer cavity 4 is also larger, when a preset value is reached, the guide rod 11 with the compression ring 12 arranged at the front end of the conduit 8 through the fixing seat 10 can be in contact with the outer spring 13, the outer spring 13 extrudes, and the impact force is simultaneously transferred to the inner spring 6 and the outer spring 13, so that the absorption of the combined spring to the impact is enhanced, and the shock absorption effect of the combined spring is improved.

Specific embodiment II:

on the basis of the first embodiment, the present embodiment is different in that:

as shown in fig. 1 and 4-6, a pressure relief structure 14 communicated with the buffer cavity 4 is fixed at one end of the outer sleeve 2 provided with the exhaust hole 7.

The pressure release structure 14 comprises a pressure release seat 1401 fixed on a supporting disk 3 through bolts, a through hole 1402 matched with the inner cavity of the inner sleeve 1 is formed in the center of the pressure release seat 1401, a pressure release hole 1403 matched with the exhaust hole 7 is formed in one end face of the pressure release seat 1401, which is close to the supporting disk 3, an adjusting hole 1404 communicated with the pressure release hole 1403 is formed in the other end face of the pressure release seat 1402, and an adjusting block 1405 is connected with the adjusting hole 1404 in a threaded mode. The pressure value of the buffer cavity 4 during the gas discharge can be adjusted according to the requirement by the adjusting block 1405, so that the absorption value of the combined spring is more adjustable and controllable.

One end of the pressure release hole 1403, which is close to the exhaust hole 7, is filled with a pressure release plug 1406 which is matched with the exhaust hole 7, a pressure release spring 1407 which extends into the pressure release hole 1403 is arranged in the adjusting hole 1404, one end of the pressure release spring 1407 is propped against the pressure release plug 1406, the other end of the pressure release spring 1407 is propped against the adjusting block 1405, an air outlet groove 1408 which is communicated with the pressure release hole 1403 is formed in the outer circular surface of the pressure release seat 1401, and an adjusting groove 1409 is formed in one end surface of the adjusting block 1405, which is far away from the pressure release spring 1407. The pressure release plug 1406 and the pressure release spring 1407 are arranged in the pressure release hole 1403, so that the pressure of the buffer cavity 4 during gas discharge can be adjusted, and the impact absorption capacity of the inner spring 6 and the buffer cavity 4 during combined action is improved. When the guide pipe 8 is impacted, the piston ring 9 compresses the air in the buffer cavity 4 while extruding the inner spring 6, double absorbs the external impact force, enhances the absorption of the inner spring 6 on the impact from the inside, and discharges part of impact conversion pressure out of the buffer cavity 5 through the exhaust hole 7, so that the shock absorption and impact resistance of the combined spring is further improved.

Third embodiment:

on the basis of the second embodiment, the difference of this embodiment is that:

as shown in fig. 1, 3 and 11, the limiting ring 15 comprises two arc plates fixedly connected together through bolts, so that the limiting ring 15 is conveniently installed on the outer circular surface of the outer sleeve 2, one arc plate is fixedly connected with the outer spring 13, and arc guide sleeves matched with the outer sleeve 2 are fixed on two end surfaces of the arc plate. The spacing ring is used for fixing the one end of outer spring 13 for outer spring 13 cover is established on outer tube 2 and is kept coaxial line with outer tube 2, can steady even emergence shrink when receiving the extrusion, makes extra effort can be steady on outer spring 13.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications and the like made on the basis of the present invention to solve the substantially same technical problems and achieve the substantially same technical effects are included in the scope of the present invention.

Claims

1. The utility model provides a multistage combination spring, includes interior sleeve pipe (1) and fixes outer tube (2) including sleeve pipe (1) outside through supporting disk (3), form buffering cavity (4) between interior sleeve pipe (1) and outer tube (2), outer tube (2) one end is fixed with fixed end cover (5), its characterized in that:

an inner spring (6) is arranged in the buffer cavity (4), an exhaust hole (7) communicated with the buffer cavity (4) is formed in one end of the outer sleeve (2), a guide pipe (8) matched with the inner sleeve (1) is penetrated through the fixed end cover (5), and a piston ring (9) matched with the buffer cavity (4) is fixed at one end of the guide pipe (8) positioned in the buffer cavity (4);

one end of the guide pipe (8) positioned outside the buffer cavity (4) is fixedly provided with a fixing seat (10), the fixing seat (10) is fixedly provided with a guide rod (11), one end of the guide rod (11) away from the fixing seat (10) is fixedly provided with a pressing ring (12) sleeved outside the outer sleeve (2), and the outer sleeve (2) is sleeved with an outer spring (13) matched with the pressing ring (12);

one end of the outer sleeve (2) provided with the exhaust hole (7) is fixed with a pressure relief structure (14) communicated with the buffer cavity (4).

2. The multi-stage combination spring according to claim 1, wherein one end of the inner sleeve (1) and one end of the outer sleeve (2) are fixedly connected into a whole through the supporting disc (3), the other ends of the inner sleeve (1) and the outer sleeve (2) are in an opening shape communicated with the buffer cavity (4), and the guide pipe (8) is sleeved outside the inner sleeve (1) and is in sliding connection with the inner sleeve (1).

3. The multi-stage combination spring according to claim 1, wherein the outer sleeve (2) is sleeved with a limiting ring (15), the limiting ring (15) is located at a position between the outer spring (13) and the compression ring (12), one end of the outer spring (13) abuts against the supporting disc (3), and the other end of the outer spring (13) abuts against the limiting ring (15).

4. The multistage combination spring according to claim 1, wherein the pressure release structure (14) comprises a pressure release seat (1401) fixed on the supporting disc (3) through bolts, a through hole (1402) matched with the inner cavity of the inner sleeve tube (1) is formed in the center of the pressure release seat (1401), a pressure release hole (1403) matched with the exhaust hole (7) is formed in one end face, close to the supporting disc (3), of the pressure release seat (1401), an adjusting hole (1404) communicated with the pressure release hole (1403) is formed in the other end face of the pressure release seat (1402), and an adjusting block (1405) is connected with the adjusting hole (1404) in an internal thread mode.

5. The multistage combination spring according to claim 4, wherein one end of the pressure release hole (1403) close to the exhaust hole (7) is filled with a pressure release plug (1406) matched with the exhaust hole (7), a pressure release spring (1407) extending into the pressure release hole (1403) is installed in the adjusting hole (1404), one end of the pressure release spring (1407) is abutted against the pressure release plug (1406), the other end of the pressure release spring (1407) is abutted against the adjusting block (1405), an air outlet groove (1408) communicated with the pressure release hole (1403) is formed in the outer circular surface of the pressure release seat (1401), and an adjusting groove (1409) is formed in one end surface of the adjusting block (1405) far away from the pressure release spring (1407).

6. The multi-stage combination spring according to claim 1, wherein the fixing base (10) comprises a fixing sleeve (1001) matched with the guide pipe (8), one end of the fixing sleeve (1001) is abutted against a fastening bolt (1002) on the outer circular surface of the guide pipe (8), a supporting plate (1003) is fixed on the outer circular surface of one end of the fixing sleeve (1001), and the guide rod (11) penetrates through the supporting plate (1003) and is fixed on the supporting plate (1003) through a nut.

7. A multi-stage combination spring according to claim 3, wherein the limiting ring (15) comprises two arc plates fixedly connected together through bolts, one arc plate is fixedly connected with the outer spring (13), and arc guide sleeves matched with the outer sleeve (2) are fixed on two end faces of the arc plate.

8. A multi-stage combination spring according to claim 1, characterized in that an end face of the piston ring (9) remote from the conduit (8) abuts against the inner spring (6), and the other end of the inner spring (6) abuts against a support disc (3) located inside the buffer chamber (4).