A novel constrained film type airbag vibration isolator

Abstract

The present invention discloses a novel constrained membrane type airbag vibration isolator, belonging to the technical field of airbag vibration isolation systems, which includes an airbag body and its flat end structure and insertion end structure. The airbag body is a rubber curtain structure. The flat end structure of the airbag body is formed by turning over one end of the rubber curtain of the airbag body through a first fastening ring and being pressed by a cover plate and a constraint skirt. The insertion end structure of the airbag body is formed by turning over the other end of the rubber curtain of the airbag body through a second fastening ring and being pressed by a bottom plate and a plug column. An airbag body anti-wear device is arranged on the outer wall of the airbag body. One side of the airbag body anti-wear device is in contact connection with the outer wall of the airbag body, and the other side is in limit contact connection with the constraint skirt and the plug column. The structure of the present invention is simple, reasonably designed, easy to use, and has high reliability and safety, and is suitable for occasions with high pressure (1.0 - 2.0 MPa) and large loads such as ship design. The airbag body anti-wear device in the present invention reduces the friction between the airbag body and the surface of metal parts, thereby effectively reducing the wear of the airbag body and improving the service life of the airbag.

Description

Technical Field

[0001] The present invention relates to the technical field of airbag vibration isolation systems, and particularly to a novel constrained diaphragm airbag vibration isolator. Background Art

[0002] Controlling the vibration caused by large power plants and mechanical equipment to meet the standard requirements is the key to the mechanical system design in the fields of industry, civil use, especially ship design and vehicle design. Adopting a vibration isolation structure is one of the most effective methods to reduce the vibration transmission of power plants and equipment.

[0003] Diaphragm airbag vibration isolators are widely used in airbag vibration isolation systems. Due to their structural characteristics and working principles, there are currently problems of friction and wear between the airbag body and the surfaces of other metal parts, which easily cause damage to the airbag and affect the service life of the airbag. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a novel constrained diaphragm airbag vibration isolator to solve the problems raised in the above technical background.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] A novel constrained diaphragm airbag vibration isolator includes an airbag body, its flat end structure, and its inserted end structure. The airbag body is a rubber curtain structure. The flat end structure of the airbag body is formed by turning one end of the rubber curtain of the airbag body over through a first fastening ring and being pressed by a cover plate and a constraint skirt. The inserted end structure of the airbag body is formed by turning the other end of the rubber curtain of the airbag body over through a second fastening ring and being pressed by a bottom plate and a plug column. An airbag anti-wear device is arranged on the outer wall of the airbag body. One side of the airbag anti-wear device is in contact connection with the outer wall of the airbag body, and the other side is in limit contact connection with the constraint skirt and the plug column.

[0007] In the above technical solution, a limiting device is further arranged inside the airbag body, and both ends of the limiting device are fixedly connected to the cover plate and the bottom plate respectively.

[0008] In the above technical solution, the airbag anti-wear device, the constraint skirt, and the plug column are all made of metal materials.

[0009] In the above technical solution, the airbag anti-wear device includes an upper sleeve and a lower sleeve. The upper sleeve is installed on the inner wall of the constraint skirt and is in contact connection with the outer wall of the airbag body; the lower sleeve is installed on the outer wall of the plug column and is in contact connection with the outer wall of the airbag body.

[0010] In the above technical solution, the upper sleeve is of a cylindrical barrel structure. A number of outer annular grooves are provided on the outer surface of the upper sleeve. The upper sleeve provided with the aforenamed a number of outer annular grooves is installed in a limited manner on the first annular groove on the inner wall of the restraint skirt, and the outer surface of the upper sleeve is in clearance fit contact connection with the inner wall of the restraint skirt;

[0011] The lower sleeve is of a cylindrical barrel structure. A number of inner annular grooves are provided on the inner surface of the lower sleeve. The lower sleeve provided with the aforenamed a number of inner annular grooves is installed in a limited manner on the second annular groove provided on the outer wall of the plug column, and the inner surface of the lower sleeve is in clearance fit contact connection with the outer wall of the plug column.

[0012] In the above technical solution, the upper sleeve is composed of two upper semi-sleeves arranged symmetrically left and right, and one side of the two upper semi-sleeves close to each other is fixed by at least one cylindrical pin;

[0013] The lower sleeve is composed of two lower semi-sleeves arranged symmetrically left and right, and one side of the two lower semi-sleeves close to each other is fixed by at least one cylindrical pin.

[0014] In the above technical solution, the limiting device includes a limiting column and a limiting seat. The limiting column has a limiting column head. The limiting column head is in limiting connection with the limiting seat. The limiting seat is fixed to the cover plate with screws; one end of the limiting column far from the limiting column head is fixed to the bottom plate with screws.

[0015] In the above technical solution, both the limiting column head and the position on the limiting seat opposite the limiting column head are of fan-shaped spline structures.

[0016] In the above technical solution, the limiting column head is coated with a rubber layer.

[0017] In the above technical solution, an air inflation hole is provided on the cover plate. One end of the air vent hole on the cover plate is communicated with the inside of the airbag, and the other end is connected to an inflation nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention provides a film airbag vibration isolator airbag anti-wear device with a simple structure, reasonable design and convenient use, which realizes the conversion of the friction between the airbag of the film airbag and the surface of the metal part into the friction between the upper sleeve and the lower sleeve and the surface of the airbag metal part, thereby reducing the friction and wear generated by the relative movement between the rubber surface of the airbag and the surface of the metal part during the operation of the film airbag vibration isolator, effectively preventing the airbag from being damaged and improving the service life of the airbag.

[0020] 2. The present invention realizes the limiting in the upper and lower directions and the horizontal direction through the limiting device, and realizes the up and down vibration of the airbag.

[0021] 3. The structure of the present invention is simple, reasonably designed, easy to use, with high reliability and safety, and is applicable to occasions with high pressure (1.0 - 2.0 MPa) and large loads such as ship design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a schematic partial structural diagram of the present invention;

[0024] Figure 3 is a sectional view of the upper sleeve in the present invention;

[0025] Figure 4 is a top view of the upper sleeve in the present invention;

[0026] Figure 5 is Figure 4 an enlarged view of part A in

[0027] Figure 6 is a sectional view of the lower sleeve in the present invention;

[0028] Figure 7 is a top view of the lower sleeve in the present invention;

[0029] Figure 8 is Figure 7 an enlarged view of part B in

[0030] Figure 9 is a side view of the limit post in the present invention;

[0031] Figure 10 is a top view of the limit post in the present invention;

[0032] Figure 11 is a sectional view of the limit seat in the present invention;

[0033] Figure 12 is a top view of the limit seat in the present invention;

[0034] Figure 13 is a schematic diagram when the limit post is just inserted into the limit seat;

[0035] Figure 14 is a schematic diagram after the limit post is inserted into the limit seat until the limit groove and rotated

[0036] In the figure, 1 is the bladder; 2 is the flat end structure; 2.1 is the first fastening ring; 2.2 is the cover plate; 2.21 is the inflation hole of the cover plate; 2.3 is the restraint skirt; 3 is the insertion end structure; 3.1 is the second fastening ring; 3.2 is the bottom plate; 3.3 is the plug column; 4 is the anti-wear device of the bladder; 4.1 is the upper sleeve; 4.11 is the outer annular groove; 4.12 is the upper half sleeve; 4.2 is the lower sleeve; 4.21 is the inner annular groove; 4.22 is the lower half sleeve; 5 is the limiting device; 5.1 is the limiting column; 5.11 is the head of the limiting column; 5.2 is the limiting seat; 5.21 is the limiting groove; 6 is the cylindrical pin; 7 is the rubber layer; 8 is the inflation nozzle. Detailed implementation manners

[0037] The following uses specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0038] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the layout type of the components may also be more complex.

[0039] Refer to Figures 1 to 14 , the present invention provides a new type of constrained membrane type air spring isolator, including a bladder 1, its flat end structure 2 and insertion end structure 3. The bladder is a rubber curtain structure. The flat end structure 2 of the bladder is formed by turning the rubber curtain at one end of the bladder 1 after being turned over by the first fastening ring 2.1 and being pressed by the cover plate 2.2 and the restraint skirt 2.3. The insertion end structure 3 of the bladder is formed by turning the rubber curtain at the other end of the bladder 1 after being turned over by the second fastening ring 3.1 and being pressed by the bottom plate 3.2 and the plug column 3.3. An anti-wear device 4 for the bladder is arranged on the outer wall of the bladder 1. One side of the anti-wear device 4 for the bladder is in contact connection with the outer wall of the bladder 1, and the other side is in limiting contact connection with the restraint skirt 2.3 and the plug column 3.3. The anti-wear device 4 for the bladder, the restraint skirt 2.3 and the plug column 3.3 are all made of metal materials.

[0040] Refer to Figures 2 to 8 , the anti-wear device 4 for the bladder includes an upper sleeve 4.1 and a lower sleeve 4.2. The upper sleeve 4.1 is installed on the inner wall of the restraint skirt 2.3 and is in contact connection with the outer wall of the bladder 1; the lower sleeve 4.2 is installed on the outer wall of the plug column 3.3 and is in contact connection with the outer wall of the bladder 1.

[0041] Refer to Figures 3 to 5 Figures 3 to 5 , the upper sleeve 4.1 is of a cylindrical barrel structure. A plurality of outer annular grooves 4.11 are provided on the outer surface of the upper sleeve 4.1. The upper sleeve 4.1 provided with the plurality of outer annular grooves 4.11 is limitedly installed on the first annular groove (not shown in the figure) on the inner wall of the restraint skirt 2.3, and the outer surface of the upper sleeve 4.1 is in clearance fit contact connection with the inner wall of the restraint skirt 2.3. Specifically, the upper sleeve 4.1 can move up and down on the first annular groove on the inner wall of the restraint skirt 2.3, but the distance of the up and down movement of the upper sleeve 4.1 is limited by the axial width of the first annular groove; the upper sleeve 4.1 is composed of two upper half sleeves 4.12 which are symmetrically arranged left and right, and one side of the two upper half sleeves 4.12 close to each other is fixed by at least one cylindrical pin 6;

[0042] Refer to Figures 6 to 8 Figures 6 to 8 , the lower sleeve 4.2 is of a cylindrical barrel structure. A plurality of inner annular grooves 4.21 are provided on the inner surface of the lower sleeve 4.2. The lower sleeve 4.2 provided with the plurality of inner annular grooves 4.21 is limitedly installed on the second annular groove (not shown in the figure) provided on the outer wall of the plug post 3.3, and the inner surface of the lower sleeve 4.2 is in clearance fit contact connection with the outer wall of the plug post 3.3; specifically, the lower sleeve 4.2 can move up and down on the second annular groove on the outer wall of the plug post 3.3, but the distance of the up and down movement of the lower sleeve 4.2 is limited by the axial width of the second annular groove. The lower sleeve 4.2 is composed of two lower half sleeves 4.22 which are symmetrically arranged left and right, and one side of the two lower half sleeves 4.22 close to each other is fixed by at least one cylindrical pin 6.

[0043] Refer to Figure 1 、 Figures 9 to 14 Figures 9 to 14 , a limiting device 5 is further provided inside the bladder 1, and both ends of the limiting device 5 are fixedly connected to the cover plate 2.2 and the bottom plate 3.2 respectively. The limiting device 5 includes a limiting post 5.1 and a limiting seat 5.2. The limiting post 5.1 has a limiting post head 5.11, and the limiting post head 5.11 is in limiting connection with the limiting seat 5.2. The limiting seat 5.2 is fixed to the cover plate 2.2 with screws; one end of the limiting post 5.1 away from the limiting post head 5.11 is fixed to the bottom plate 3.2 with screws.

[0044] Refer to Figure 10 and Figure 12 Figure 12 , both the limiting post head 5.11 and the position of the limiting seat 5.2 opposite to the limiting post head 5.11 are of a spline structure with a sector shape. A limiting groove 5.21 is further provided on the limiting seat 5.2. The limiting groove 5.21 is used to limit the up and down movement of the post head, and its height in the axial direction limits the distance of the up and down movement of the post head. The limiting groove 5.21 is opposite to the spline structure with a sector shape on the limiting seat 5.2.

[0045] In the present invention, the limiting device 5 can be used to limit the capsule body 1 in the up and down directions and the horizontal direction. The specific limiting principle is as follows: First, fix the cover plate 2.2 (or the bottom plate 3.2), and then insert the spline structure of the head 5.11 of the limiting column into the spline structure of the limiting seat 5.2 (see Figure 13 ), until it is inserted into the limiting groove 5.21 of the limiting seat 5.2, and then rotate the limiting column 5.1 (see Figure 14 ) to prevent it from disengaging from the limiting seat 5.2. Finally, fix the cover plate 2.2 (or the bottom plate 3.2); when in use, the novel constrained film type air spring isolator provided by the present invention allows vibration displacement within the designed range in the horizontal direction and the up and down directions. Specifically, the limiting column 5.1 does not move in the horizontal direction, and the capsule body 1 undergoes vibration displacement in the horizontal direction; the limiting column 5.1 undergoes displacement within the designed range in the up and down directions, and the capsule body 1 undergoes vibration displacement within the designed range in the up and down directions. The head 5.11 of the limiting column is also coated with a rubber layer 7 for buffering and vibration isolation.

[0046] In the present invention, an air inflation hole 2.21 is provided on the cover plate 2.2. One end of the air ventilation hole 2.21 of the cover plate is communicated with the inside of the capsule body 1, and the other end is connected to an inflation nozzle 8.

[0047] The working principle of the capsule body anti-wear device 4 in the present invention is as follows:

[0048] The inner cylindrical surface of the upper sleeve 4.1 is in close contact with the outer surface of the capsule body 1 of the air spring isolator, and the outer cylindrical surface of the upper sleeve 4.1 is in clearance fit contact with the inner cylindrical surface of the constraint skirt 2.3.

[0049] When the airbag 1 works, it undergoes up and down vibration displacement. Since the friction between the outer surface of the capsule body 1 and the inner cylindrical surface of the upper sleeve 4.1 is the friction between rubber and metal surfaces, and its frictional force is much greater than the frictional force between the outer cylindrical surface of the upper sleeve 4.1 and the inner cylindrical surface of the constraint skirt 2.3 (metal to metal surfaces), the relative movement generated by the vibration of the airbag mainly occurs between the upper sleeve 4.1 and the constraint skirt 2.3, thereby effectively reducing the wear of the airbag capsule body.

[0050] Similarly, the lower sleeve 4.2 is installed on the plug post 3.3. The outer cylindrical surface of the lower sleeve 4.2 is in close contact with the outer surface of the bladder 1, and the inner cylindrical surface of the upper sleeve 4.2 is in clearance fit contact with the outer cylindrical surface of the plug post 3.3. When the airbag 1 works, it undergoes vertical vibration displacement. Since the friction between the surface of the bladder 1 and the outer cylindrical surface of the upper sleeve 4.2 is the friction between rubber and metal surfaces, its frictional force is much greater than the frictional force between the inner cylindrical surface of the lower sleeve 4.2 and the plug post 3.3, which is the friction between metal and metal surfaces. Therefore, the relative movement generated by the vibration of the airbag mainly occurs between the lower sleeve 4.2 and the plug post 3.3, thereby effectively reducing the wear of the bladder 1 of the airbag isolator. The outer annular groove 4.11 on the outer surface of the upper sleeve 4.1 and the inner annular groove 4.21 on the inner surface of the lower sleeve 4.2 described in the present invention play a role in further reducing the contact area at the corresponding positions and reducing the frictional resistance.

[0051] The beneficial effects of the present invention are as follows: It can reduce the frictional wear generated by the relative movement between the rubber surface of the bladder and the surface of the metal parts during the operation of the diaphragm airbag isolator, and improve the service life of the airbag.

[0052] The above-described embodiments only represent the specific implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A novel constrained membrane type airbag vibration isolator, comprising an airbag body (1). Characterized in that, The flat end structure (2) of the airbag body (1) is formed by turning one end of the rubber curtain of the airbag body (1) through a first fastening ring (2.1) and then being pressed by a cover plate (2.2) and a constraint skirt plate (2.3). The insertion end structure (3) of the airbag body (1) is formed by turning the other end of the rubber curtain of the airbag body (1) through a second fastening ring (3.1) and then being pressed by a bottom plate (3.2) and a plug column (3.3). An airbag anti-wear device (4) is arranged on the outer wall of the airbag body (1). One side of the airbag anti-wear device (4) is in contact connection with the outer wall of the airbag body (1), and the other side is in limit contact connection with the constraint skirt plate (2.3) and the plug column (3.3). A limiting device (5) is further arranged inside the airbag body (1), and both ends of the limiting device (5) are fixedly connected with the cover plate (2.2) and the bottom plate (3.2) respectively. The airbag anti-wear device (4) comprises an upper sleeve (4.1) and a lower sleeve (4.2). The upper sleeve (4.1) is installed on the inner wall of the constraint skirt plate (2.3) and is in contact connection with the outer wall of the airbag body (1). The lower sleeve (4.2) is installed on the outer wall of the plug column (3.3) and is in contact connection with the outer wall of the airbag body (1). The upper sleeve (4.1) is of a cylindrical tube structure. A plurality of outer annular grooves (4.11) are arranged on the outer surface of the upper sleeve (4.1). The upper sleeve (4.1) provided with the plurality of outer annular grooves (4.11) is installed in a first annular groove on the inner wall of the constraint skirt plate (2.3) in a limiting manner, and the outer surface of the upper sleeve (4.1) is in clearance fit contact connection with the inner wall of the constraint skirt plate (2.3). The lower sleeve (4.2) is of a cylindrical tube structure. A plurality of inner annular grooves (4.21) are arranged on the inner surface of the lower sleeve (4.2). The lower sleeve (4.2) provided with the plurality of inner annular grooves (4.21) is installed in a second annular groove arranged on the outer wall of the plug column (3.3) in a limiting manner, and the inner surface of the lower sleeve (4.2) is in clearance fit contact connection with the outer wall of the plug column (3.3).

2. A novel constrained membrane type airbag vibration isolator according to claim 1, Characterized in that, The airbag anti-wear device (4), the constraint skirt plate (2.3) and the plug column (3.3) are all made of metal materials.

3. A novel constrained membrane type airbag vibration isolator according to claim 1, Characterized in that, The upper sleeve (4.1) is composed of two upper half sleeves (4.12) arranged symmetrically left and right, and at least one cylindrical pin (6) is used for fixing on one side where the two upper half sleeves (4.12) are close to each other. The lower sleeve (4.2) is composed of two lower half sleeves (4.22) arranged symmetrically left and right, and at least one cylindrical pin (6) is used for fixing on one side where the two lower half sleeves (4.22) are close to each other.

4. A novel constrained membrane type airbag vibration isolator according to claim 1, Characterized in that, The limiting device (5) includes a limiting post (5.1) and a limiting seat (5.2). The limiting post (5.1) has a limiting post head (5.11). The limiting post head (5.11) is in limiting connection with the limiting seat (5.2). The limiting seat (5.2) is fixed to the cover plate (2.2) with screws. One end of the limiting post (5.1) away from the limiting post head (5.11) is fixed to the bottom plate (3.2) with screws.

5. A novel constrained membrane type air spring isolator according to claim 4, characterized in that, both the limiting post head (5.11) and the position of the limiting seat (5.2) opposite to the limiting post head (5.11) are of a spline structure.

6. A novel constrained membrane type air spring isolator according to claim 5, characterized in that, the limiting post head (5.11) is coated with a rubber layer (7).

7. A novel constrained membrane type air spring isolator according to claim 1, characterized in that, the cover plate (2.2) is provided with a cover plate inflation hole (2.21). One end of the cover plate inflation hole (2.21) is communicated with the inside of the airbag (1), and the other end is connected to an inflation nozzle (8).

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