Stepless rigidity-variable energy accumulator

Abstract

The utility model discloses a stepless variable rigidity energy accumulator which comprises a shell and a piston arranged in the shell, the piston divides the interior of the energy accumulator into a working cavity and an oil cavity, a movable piston is arranged in the working cavity, and the movable piston moves in the working cavity to enable the size of the working cavity to be variable; an adjusting stud for adjusting the movement of the movable piston in the working cavity is arranged on the movable piston; an air storage tank is arranged outside the energy accumulator shell and communicated with the variable working cavity. According to the energy accumulator, the working cavity of the energy accumulator is changed through the energy storage tank arranged outside the shell and the movable piston, then the rigidity is changed, the technical problem that the rigidity of a single energy accumulator of an existing energy accumulator cannot be changed is solved, and linear change of the rigidity of the single energy accumulator is achieved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering, and specifically designs an infinitely variable stiffness accumulator used in the field of automobile manufacturing. Background Art

[0002] The accumulator plays the role of energy conversion in the system, converting the system's energy into compression energy and potential energy and storing it. When the system needs it, the energy is released and re-supplied to the system.

[0003] In the prior art, an accumulator consists of a sealed housing, the interior of which is divided into an oil chamber and a working chamber by a piston. The effective volume of a rigid accumulator is a fixed value and cannot be changed once manufactured.

[0004] Accumulator stiffness can only be adjusted by varying the pre-charge gas pressure. Changing the stiffness of a hydro-pneumatic spring requires connecting multiple accumulators in parallel. Connecting different numbers of accumulators allows for varying stiffness adjustments. This creates a hierarchy of stiffness adjustments. When designing a spring, the accumulator volume and initial pressure alone can only be used to meet most performance requirements. This doesn't allow for real-time adjustments to optimize the spring's stiffness under all operating conditions.

[0005] Moreover, in some mechanical devices, such as automobiles, which have a high degree of integration and limited space, an accumulator that occupies a smaller space is needed.

[0006] Therefore, an accumulator that can achieve continuous output stiffness and takes up a small space is required. Utility Model Content

[0007] In order to achieve the above-mentioned purpose, the utility model discloses an accumulator with infinitely variable stiffness. This accumulator changes the working chamber of the accumulator and thus changes the stiffness by means of an air storage tank arranged outside the shell and a movable piston, thereby solving the technical problem of the existing accumulator that the stiffness of a single accumulator is immutable, and realizing linear change of the stiffness of a single accumulator.

[0008] The technical solution of the utility model is as follows:

[0009] An infinitely variable stiffness accumulator comprises a housing and a piston disposed within the housing. The piston divides the interior of the accumulator into a working chamber and an oil chamber. A movable piston is disposed within the working chamber and moves within the working chamber, thereby making the volume of the working chamber variable. An adjusting stud is disposed on the movable piston for adjusting the movement of the movable piston within the working chamber.

[0010] An air storage tank is provided outside the accumulator housing and is communicated with the variable working chamber.

[0011] Furthermore, the gas storage tank is communicated with the variable working chamber through a communicating pipe.

[0012] Furthermore, the movable piston is provided with a mounting hole for mounting an adjusting stud and a communicating hole for mounting a communicating pipe.

[0013] Furthermore, a driving mechanism for driving the adjusting screw to move is provided on the housing.

[0014] Furthermore, the connecting pipe is a flexible pipe or part of it is a flexible pipe.

[0015] Furthermore, the connecting pipe is a flexible pipe located outside the shell, and a vent valve is provided near the gas tank.

[0016] Furthermore, the adjusting stud is connected to the movable piston through a mounting hole on the movable piston.

[0017] Furthermore, the mounting hole and the communicating hole provided on the movable piston are the same.

[0018] Furthermore, the adjusting stud is hollow.

[0019] Furthermore, one end of the adjusting screw extending outside the housing is connected to the flexible tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The movable piston changes the size of the working chamber under the drive of the adjusting stud, thereby changing the rigid

[0022] The technical problem of the existing energy storage device having constant stiffness is solved.

[0023] 2. The external gas storage tank makes the volume of the energy accumulator controllable, thereby reducing the volume of the energy accumulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structural diagram of the utility model is shown in Example 1

[0025] In the figure, the housing 1, the piston 2, the working chamber 3, the oil chamber 4, the movable piston 5, the adjusting stud 6, the air storage tank 7, the connecting pipe 8, the driving mechanism 9, and the vent valve 10. Specific embodiments

[0026] like Figure 1As shown, a stepless variable stiffness accumulator includes a shell 1 and a piston 2 arranged inside the shell 1. The piston 2 divides the interior of the accumulator into a working chamber 3 and an oil chamber 4. A movable piston 5 is provided in the working chamber 3. The movable piston 5 moves in the working chamber 3 so that the volume of the working chamber 3 is variable; an adjusting stud 6 for adjusting the movement of the movable piston 5 in the working chamber 3 is provided on the movable piston 5; an air tank 7 is provided outside the accumulator shell 1, and the air tank 7 is connected to the variable working chamber 3.

[0027] The adjusting stud is a cylindrical drive rod with threads on the outside.

[0028] The accumulator of the present invention comprises a sealed housing 1. A piston 2 disposed within the housing 1 divides the interior of the accumulator into an oil chamber 4 and a working chamber 3. A movable piston 5 is disposed within the working chamber 3, and an adjustment stud 6 is mounted on the movable piston 5. The adjustment stud 6 drives the movable piston 52 to move within the working chamber 3, causing the volume of the working chamber 3 to change. To maintain pressure balance within the working chamber 3, an air tank 7 is disposed outside the accumulator housing 1.

[0029] The gas storage tank 7 of the present invention is connected to the variable working chamber 3 through a connecting pipe 8.

[0030] The movable piston 5 of the present invention is provided with a mounting hole for the adjustment stud 6 and a connecting hole for the connecting pipe 8. A sealing ring is provided at the contact point between the movable piston 5 and the housing 1. The working chamber 3 formed by the movable piston 5 and piston 2 is sealed. Even if a connecting hole is present, it forms a sealed space with the air tank 7. Furthermore, the mounting hole is provided in the middle of the movable piston 5 to maintain a flat surface during its vertical movement. In some embodiments, the adjustment stud is inserted into the mounting hole and secured with a nut.

[0031] The housing 1 of the present invention is provided with a drive mechanism 9 for driving the adjustment screw 6. This drive mechanism 9 comprises a motor, a gear train including planetary gears, and an adjustment screw sleeve mounted on the housing 1. This mechanism drives the adjustment screw 6 in vertical motion. The non-working chamber formed by the movable piston 5 and the housing 1 is not sealed.

[0032] The connecting tube 8 mentioned in the present invention is a flexible tube or a partially flexible tube. The flexible tube is installed in the connecting hole of the movable piston 5 and extends out of the housing 1, where its other end is connected to the air tank 7. In some embodiments, the tube is partially flexible, with the outer portion of the housing 1 being flexible, facilitating installation and saving space. In some embodiments, the inner portion of the housing 1 is a flexible tube, which lengthens or shortens according to the movement of the movable piston 5, converging on the side of the non-working chamber.

[0033] The connecting pipe 8 of the present invention is located outside the housing 1 and is a flexible pipe. A vent valve 10 is provided near the gas storage tank 7. The vent valve 10 is used to adjust the amount of gas between the working chamber 3 and the gas storage tank 7.

[0034] The adjusting stud of the present invention is connected to the movable piston 5 through the mounting hole on the movable piston 5 .

[0035] In certain embodiments of the present invention, the mounting hole and the communication hole provided on the movable piston 5 are the same. Furthermore, the adjustment stud is hollow. The hollow adjustment stud is mounted in the mounting hole that serves as the communication hole, while one end of the adjustment stud protruding from the exterior of the housing 1 is connected to the flexible tube. This saves space, improves the durability of the movable piston 5, and eliminates the need for additional holes in the design.

[0036] Example 1

[0037] When the mounting hole and the communicating hole on the movable piston 5 are one, the adjusting stud is hollow, one end of the adjusting stud is inserted into the movable piston 5, and is fixed with a nut on one side of the working chamber 3 composed of the movable piston 5, the shell 1, and the piston 2. One end of the adjusting stud extends out of the shell 1 through the driving mechanism 9 provided in the shell 1 and is connected to the flexible tube.

[0038] The driving mechanism 9 drives the adjusting stud to move up and down, and the adjusting stud drives the movable piston 52 to move, thereby changing the volume of the working chamber 3 and adjusting the vent valve 10 to change the stiffness, so that the output stiffness is continuous.

[0039] Example 2

[0040] The movable piston 5 is provided with a mounting hole and a communication hole. One end of an adjusting stud is inserted into the movable piston 5 and secured with a nut on one side of the working chamber 3 formed by the movable piston 5, the housing 1, and the piston 2. One end of the adjusting stud extends outside the housing 1 through a drive mechanism 9 provided in the housing 1. One end of a flexible tube is mounted in the communication hole and extends out of the housing 1. The other end is connected to the air tank 7.

[0041] The driving mechanism 9 drives the adjusting stud to move up and down, which in turn drives the movable piston 5 to move, changing the volume of the working chamber 3. The flexible tube also moves accordingly, and according to the adjustment of the vent valve 10, the stiffness is changed, so that the output stiffness is continuous.

Claims

1. An infinitely variable stiffness accumulator, comprising a housing (1), a piston (2) disposed within the housing (1), the piston (2) dividing the interior of the accumulator into a working chamber (3) and an oil chamber (4), characterized in that: A movable piston (5) is provided in the working chamber (3), and the movable piston (5) moves in the working chamber (3), so that the volume of the working chamber (3) is variable; an adjusting stud (6) is provided on the movable piston (5) for adjusting the movement of the movable piston (5) in the working chamber (3); An air storage tank (7) is provided outside the housing (1) of the accumulator, and the air storage tank (7) is communicated with the variable working chamber (3).

2. The stepless variable stiffness accumulator according to claim 1, characterized in that: The gas storage tank (7) is communicated with the variable working chamber (3) via a communicating pipe (8).

3. The stepless variable stiffness accumulator according to claim 2, characterized in that: The movable piston (5) is provided with a mounting hole for mounting an adjusting stud (6) and a communicating hole for mounting a communicating pipe (8).

4. The stepless variable stiffness accumulator according to claim 3, characterized in that: The housing (1) is provided with a driving mechanism (9) for driving the adjusting screw (6) to move.

5. The stepless variable stiffness accumulator according to claim 4, characterized in that: The connecting pipe (8) is a flexible pipe or a part of it is a flexible pipe.

6. The stepless variable stiffness accumulator according to claim 5, characterized in that: The connecting pipe (8) is located outside the shell (1) and is a flexible pipe. A vent valve (10) is provided near the gas storage tank (7).

7. The stepless variable stiffness accumulator according to claim 6, characterized in that: The adjusting stud (6) is connected to the movable piston (5) through a mounting hole on the movable piston (5).

8. The stepless variable stiffness accumulator according to claim 7, characterized in that: The mounting hole and the communicating hole provided on the movable piston (5) are the same.

9. The stepless variable stiffness accumulator according to claim 8, characterized in that: The adjusting stud (6) is hollow.

10. The stepless variable stiffness accumulator according to claim 9, characterized in that: One end of the adjusting screw (6) extending outside the housing (1) is connected to the flexible tube.

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