Shock absorber, vibration isolation device, two-device cover and refrigeration equipment

Abstract

The embodiment of the utility model provides a shock absorber, a vibration isolation device, two device covers and refrigeration equipment, and belongs to the technical field of refrigeration, a first deformation mechanism has positive rigidity, and one end of the first deformation mechanism is installed on a main base. The adjusting blocks are connected with the other end of the first deformation mechanism, the adjusting blocks and the main base are arranged in the first direction, the adjusting blocks are arranged on the two opposite sides of the first deformation mechanism in a striding mode in the second direction, and the second direction and the first direction are arranged in a crossed mode. The auxiliary bases are arranged on the two opposite sides of the main base in the second direction. The second deformation mechanisms have negative stiffness, the auxiliary bases on each side are correspondingly provided with the second deformation mechanisms, and the second deformation mechanisms on each side are rotationally connected with the corresponding auxiliary bases and the corresponding ends of the adjusting blocks correspondingly. According to the shock absorber, the vibration isolation device, the two device covers and the refrigeration equipment, the good vibration isolation effect is achieved in a low-frequency interval, and vibration noise of the two device covers can be reduced.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a vibration damper, a vibration isolation device, a two-device cover and a refrigeration device. Background Art

[0002] During operation, refrigeration equipment requires the compressor to start. The two components of the refrigeration equipment are a starter and an overload protector. The starter starts the compressor, while the overload protector protects the compressor in the event of an overload. Covers for both components are installed over the compressor and over both components. In related art, during operation, the covers generate significant vibration and noise. Utility Model Content

[0003] In view of this, embodiments of the present application hope to provide a vibration absorber, a vibration isolation device, two-device covers and a refrigeration device to reduce the vibration noise of the two-device covers.

[0004] To achieve the above-mentioned objectives, a first aspect of an embodiment of the present application provides a shock absorber, comprising:

[0005] Main base;

[0006] a first deformation mechanism having positive stiffness, wherein one end of the first deformation mechanism is mounted on the main base;

[0007] an adjustment block connected to the other end of the first deformation mechanism, wherein the adjustment block and the main base are arranged in a first direction, and the adjustment block is arranged on opposite sides of the first deformation mechanism along a second direction, wherein the second direction is arranged to intersect the first direction;

[0008] Auxiliary bases, each of which is provided on two opposite sides of the main base along the second direction;

[0009] The second deformation mechanism has negative stiffness. The auxiliary base on each side is correspondingly provided with the second deformation mechanism. The second deformation mechanism on each side is rotatably connected to the corresponding ends of the auxiliary base and the adjustment block respectively.

[0010] In some embodiments, the center of rotation of the second deformation mechanism relative to the corresponding auxiliary base is the first rotation center, and the center of rotation of the second deformation mechanism relative to the corresponding end of the adjustment block is the second rotation center. In a static state, the first rotation center and the second rotation center are arranged along the second direction, and the first direction is perpendicular to the second direction.

[0011] In some embodiments, the center of rotation of the second deformation mechanism relative to the corresponding auxiliary base is the first rotation center, and the center of rotation of the second deformation mechanism relative to the corresponding end of the adjustment block is the second rotation center. Along the second direction, the first rotation centers on both sides are located between the second rotation centers on both sides.

[0012] In some embodiments, the second deformation mechanism on each side is located on a side of the adjustment block facing the first deformation mechanism along the first direction.

[0013] In some embodiments, the first deformation mechanism is an elastic member, and the elastic member is an air spring.

[0014] In some embodiments, the second deformation mechanism is a drive cylinder, and the drive cylinder includes:

[0015] Cylinder body;

[0016] A piston body is located in the cylinder body to divide the space in the cylinder body into two chambers, and the piston body is formed with a communication hole, and the two chambers in the cylinder body are connected through the communication hole;

[0017] A piston rod is connected to the piston body, the piston rod at least partially extending out of the cylinder body, one of the cylinder body and the piston rod is rotatably connected to the corresponding auxiliary base, and the other of the cylinder body and the piston rod is rotatably connected to the corresponding end of the adjustment block.

[0018] A second aspect of the embodiments of the present application provides a vibration isolation device, comprising:

[0019] A mounting body having a receiving surface, wherein the receiving surface of the mounting body is used to receive vibration of the compressor;

[0020] In any of the above-mentioned vibration absorbers, the main base and the auxiliary base are both connected to a side of the mounting body facing away from the receiving surface.

[0021] A third aspect of the present application provides a two-device cover, comprising:

[0022] Cover body;

[0023] In any of the above-mentioned vibration isolation devices, the cover is installed on a side of the installation body facing away from the receiving surface.

[0024] In some embodiments, the installation body includes:

[0025] a mounting plate, the receiving surface being formed on the mounting plate, the mounting plate having a relief hole for evading the two devices of the compressor, the relief hole penetrating the receiving surface, the main base and the auxiliary base being connected to a side of the mounting plate facing away from the receiving surface;

[0026] The support platform is respectively connected to the mounting plate and the cover body, the support platform is located on the side of the mounting plate away from the receiving surface, the support platform has an avoidance cavity, the shock absorber is located in the avoidance cavity, the support platform is located on the outside of the avoidance hole, and the support platforms are arranged on opposite sides of the avoidance hole. The arrangement directions of the support platforms on both sides are respectively arranged to cross the axial direction of the avoidance hole and the second direction.

[0027] A fourth aspect of the present application provides a refrigeration device, including:

[0028] Refrigeration host;

[0029] A compressor, installed on the refrigeration host;

[0030] Two devices, installed on the compressor, including a starter for starting the compressor and an overload protector for protecting the compressor;

[0031] In any one of the above-mentioned two-device covers, the side of the mounting body facing the receiving surface is connected to the compressor, and the two-device cover is provided to cover the two devices.

[0032] The shock absorber of the embodiment of the present application is configured by setting a first deformation mechanism with positive stiffness in the first direction, and arranging a second deformation mechanism with negative stiffness on opposite sides of the main base along the second direction. The two ends of the first deformation mechanism along the first direction and the second deformation mechanism are respectively kept consistent with the positions of the corresponding ends of the auxiliary base and the adjustment block for rotational connection. The first deformation mechanism with positive stiffness and the second deformation mechanism with negative stiffness are in parallel. The main base, the first deformation mechanism, the adjustment block, the auxiliary base and the second deformation mechanism constitute a quasi-zero stiffness structure. The quasi-zero stiffness structure has higher static stiffness and lower dynamic stiffness, so that the quasi-zero stiffness structure has better vibration isolation effect in the low-frequency range, which is beneficial to reducing the vibration noise of the two device covers. Since the second deformation mechanism is provided on both sides of the second direction, and the second deformation mechanism on each side is rotatably connected to the corresponding ends of the auxiliary base and the adjustment block respectively, the vibration of the compressor drives the main base and the auxiliary base to displace, causing the first deformation mechanism and the second deformation mechanism to deform. The component forces generated by the deformation of the second deformation mechanisms on both sides in the second direction are roughly equal and in opposite directions, so that the adjustment block connected to the second deformation mechanism and the first deformation mechanism connected to the adjustment block have better lateral stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a refrigeration device according to an embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of two device covers according to an embodiment of the present application;

[0035] Figure 3This is a schematic structural diagram of a vibration isolation device according to an embodiment of the present application;

[0036] Figure 4 for Figure 3 Cross-sectional view at position AA;

[0037] Figure 5 This is a schematic structural diagram of the second deformation mechanism of an embodiment of the present application;

[0038] Figure 6 Schematic diagram of the second deformation mechanism in different positions of an embodiment of the present application. The solid line in the figure shows the position of the second deformation mechanism in a static state, and the dotted line in the figure shows the offset position of the second deformation mechanism from the static position in a dynamic state.

[0039] Figure 7 This is a schematic structural diagram of the cover body according to an embodiment of the present application.

[0040] Explanation of the accompanying drawings: 1. Main base; 2. First deformation mechanism; 3. Adjustment block; 31. Mounting arm; 4. Auxiliary base; 5. Second deformation mechanism; 51. Cylinder body; 52. Piston body; 521. Connecting hole; 53. Chamber; 54. Piston rod; 6. First rotation center; 7. Second rotation center; 100. Vibration isolation device; 101. Mounting body; 1011. Receiving surface; 1012. Mounting plate; 1112. Avoidance hole; 1013. Support platform; 1113. Avoidance chamber; 1213. Mounting hole; 102. Shock absorber; 300. Two-device cover; 200. Cover body; 201. Flange; 400. Refrigeration host; 500. Compressor. DETAILED DESCRIPTION

[0041] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0042] In the related art, during the operation of the refrigeration equipment, the compressor needs to be turned on and run. The compressor generates vibration during operation. The low-frequency part of the compressor vibration is difficult to be well isolated. The two device covers generate low-frequency resonance under the vibration excitation of the compressor, which makes the vibration noise of the two device covers relatively large.

[0043] In view of this, the present application embodiment provides a refrigeration device, please refer to Figure 1 The refrigeration equipment includes a refrigeration unit 400, a compressor 500, two devices, and a device cover 300. The compressor 500 is mounted on the refrigeration unit 400. The two devices are mounted on the compressor 500, including a starter for starting the compressor 500 and an overload protector for protecting the compressor 500. The device cover 300 is mounted on the two devices.

[0044] The refrigerant is compressed by the compressor 500 to provide the refrigeration host 400 with compressed refrigerant for cooling.

[0045] The starter in the two devices is used to start the compressor 500.

[0046] The overload protector in the two devices protects the compressor 500. In the event of an overload during the operation of the compressor 500, the overload protector cuts off power to stop the compressor 500.

[0047] By covering the two devices with the two-device covers 300 , the possibility of the two devices being exposed can be reduced as much as possible, which is beneficial for better protecting the two devices and the wiring harness connecting the two devices through the two-device covers 300 .

[0048] The two-device cover 300 of the embodiment of the present application is shown in FIG. Figure 2 The two-device cover 300 includes a cover body 200 and a vibration isolation device 100 . The vibration isolation device 100 is installed on the compressor 500 , and the cover body 200 is connected to the vibration isolation device 100 .

[0049] Exemplarily, the two devices are disposed through the vibration isolation device 100 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0050] Exemplarily, the starter is disposed through the vibration isolation device 100 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0051] Exemplarily, the overload protector is disposed through the vibration isolation device 100 so that both devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0052] Exemplarily, the cover 200 and the vibration isolator are connected by bolts.

[0053] The vibration isolation device 100 of the embodiment of the present application is shown in FIG. Figure 4 The vibration isolation device 100 includes a mounting body 101 and a vibration damper 102. The mounting body 101 has a receiving surface 1011 for receiving vibrations of the compressor 500. The vibration damper 102 is connected to a side of the mounting body 101 facing away from the receiving surface 1011.

[0054] For example, see Figure 2 and Figure 4 The cover body 200 is installed on a side of the installation body 101 away from the receiving surface 1011.

[0055] For example, see Figures 1 to 4 The side of the installation body 101 facing the receiving surface 1011 is connected to the compressor 500.

[0056] Exemplarily, the two devices are disposed through the installation body 101 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0057] Exemplarily, the starter is disposed through the installation body 101 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0058] Exemplarily, the overload protector is disposed through the installation body 101 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0059] The vibration absorber 102 of the embodiment of the present application is shown in FIG. Figure 4 The shock absorber 102 includes a main base 1, a first deformation mechanism 2, an adjustment block 3, an auxiliary base 4 and a second deformation mechanism 5. The first deformation mechanism 2 has positive stiffness, and one end of the first deformation mechanism 2 is mounted on the main base 1. The adjustment block 3 is connected to the other end of the first deformation mechanism 2, and the arrangement direction of the adjustment block 3 and the main base 1 is the first direction. The adjustment block 3 is arranged on the opposite sides of the first deformation mechanism 2 along the second direction, and the second direction is arranged crosswise with the first direction. The auxiliary base 4 is provided on both opposite sides of the main base 1 along the second direction. The second deformation mechanism 5 has negative stiffness, and the auxiliary base 4 on each side is correspondingly provided with the second deformation mechanism 5, and the second deformation mechanism 5 on each side is respectively rotatably connected to the corresponding ends of the auxiliary base 4 and the adjustment block 3.

[0060] Exemplarily, the main base 1 and the auxiliary base 4 are both connected to a side of the installation body 101 facing away from the receiving surface 1011 .

[0061] The positive stiffness of the first deformation mechanism 2 means that the deformation of the first deformation mechanism 2 increases as the force acting on the first deformation mechanism 2 increases.

[0062] The adjustment block 3 is connected to the other end of the first deformation mechanism 2. When the main base 1 is impacted by vibration excitation, it moves toward the adjustment block 3. Due to inertia, the adjustment block 3 will remain in place as much as possible, so that the first deformation mechanism 2 between the adjustment block 3 and the main base 1 will repeatedly expand and contract and deform under the vibration impact of the main base 1.

[0063] The negative stiffness of the second deformation mechanism 5 means that the deformation of the second deformation mechanism 5 decreases as the force acting on the second deformation mechanism 5 increases.

[0064] For example, see Figure 4 , the direction indicated by the arrow R1 in the figure is the first direction.

[0065] For example, see Figure 4 The direction indicated by the arrow R2 in the figure is the second direction.

[0066] For example, see Figure 4 , the first direction and the second direction are perpendicular.

[0067] In the embodiment of the present application, a first deformation mechanism 2 with positive stiffness is set in the first direction, and a second deformation mechanism 5 with negative stiffness is arranged on the opposite sides of the main base 1 along the second direction. The two ends of the first deformation mechanism 2 along the first direction and the second deformation mechanism 5 are respectively kept consistent with the positions of the corresponding ends of the auxiliary base 4 and the adjustment block 3, and the first deformation mechanism 2 with positive stiffness and the second deformation mechanism 5 with negative stiffness are in a parallel state. The main base 1, the first deformation mechanism 2, the adjustment block 3, the auxiliary base 4 and the second deformation mechanism 5 constitute a quasi-zero stiffness structure. The quasi-zero stiffness structure has higher static stiffness and lower dynamic stiffness, so that the quasi-zero stiffness structure has better vibration isolation effect in the low-frequency range, which is beneficial to reducing the vibration noise of the two device covers. Since the second deformation mechanism 5 is provided on both sides of the second direction, and the second deformation mechanism 5 on each side is rotatably connected to the corresponding ends of the auxiliary base 4 and the adjustment block 3, the vibration of the compressor 500 drives the main base 1 and the auxiliary base 4 to displace, causing the first deformation mechanism 2 and the second deformation mechanism 5 to deform. The component forces generated by the deformation of the second deformation mechanisms 5 on both sides in the second direction are roughly equal and in opposite directions, so that the adjustment block 3 connected to the second deformation mechanism 5 and the first deformation mechanism 2 connected to the adjustment block 3 have better lateral stability.

[0068] In some embodiments, see Figure 4 The center of rotation of the second deformation mechanism 5 relative to the corresponding auxiliary base 4 is the first rotation center 6, and the center of rotation of the second deformation mechanism 5 relative to the corresponding end of the adjustment block 3 is the second rotation center 7. In a static state, the first rotation center 6 and the second rotation center 7 are arranged along the second direction, and the first direction is perpendicular to the second direction.

[0069] The first rotation center 6 and the second rotation center 7 are both corresponding central axes. The first rotation center 6 and the second rotation center 7 are arranged along the second direction, and the planes respectively coinciding with the first rotation center 6 and the second rotation center 7 are parallel to the second direction.

[0070] In the embodiment of the present application, in static state, the first rotation center 6 and the second rotation center 7 are arranged along the second direction, and the force applied by the second deformation mechanism 5 through the first rotation center 6 and the second rotation center 7 is basically along the second direction, with almost no component force along the first direction. In static state, there is almost no offsetting effect on the force of the first deformation mechanism 2 in the first direction, which is beneficial to improving the stiffness of the shock absorber 102 in static state.

[0071] It is understandable that the structures of the first rotation center 6 and the second rotation center 7 are not limited. For example, in a static state, the arrangement direction of the first rotation center 6 and the second rotation center 7 may be an acute angle or an obtuse angle with the first direction.

[0072] In some embodiments, see Figure 4 The center of rotation of the second deformation mechanism 5 relative to the corresponding auxiliary base 4 is the first rotation center 6, and the center of rotation of the second deformation mechanism 5 relative to the corresponding end of the adjustment block 3 is the second rotation center 7. Along the second direction, the first rotation center 6 on both sides is located between the second rotation centers 7 on both sides.

[0073] For example, see Figure 4 The second deformation mechanism 5 on each side is located between the corresponding first rotation center 6 and the corresponding second rotation center 7 along the second direction.

[0074] Exemplarily, the second deformation mechanism 5 on each side may be partially located on the side of the corresponding second rotation center 7 away from the first rotation center 6 along the second direction.

[0075] In the embodiment of the present application, the main base 1 and the auxiliary base 4 are both connected to the mounting body 101. During the vibration of the compressor 500, there is almost no relative displacement between the main base 1 and the auxiliary base 4. However, the lateral deformation during the vibration process may cause lateral relative displacement between the first deformation mechanism 2 and the adjustment block 3 along the second direction. Since the first rotation center 6 on both sides is located between the second rotation centers 7 on both sides along the second direction, the second rotation centers 7 at both ends of the adjustment block 3 along the second direction and which are rotationally connected to the second deformation mechanism 5 are away from the first deformation mechanism 2, reducing the possibility of the adjustment block 3 interfering with the first deformation mechanism 2 along the second direction at the position of the second rotation center 7.

[0076] It is understandable that the positions of the first rotation center 6 and the second rotation center 7 are not limited. For example, along the second direction, the second rotation centers 7 on both sides are located between the first rotation centers 6 on both sides.

[0077] In some embodiments, see Figure 4 The second deformation mechanism 5 on each side is located on one side of the adjustment block 3 facing the first deformation mechanism 2 along the first direction.

[0078] For example, see Figure 4 Both ends of the adjustment block 3 along the second direction have mounting arms 31 , and the mounting arms 31 protrude from one side of the adjustment block 3 toward the main base 1 along the first direction.

[0079] In the embodiment of the present application, the first deformation mechanism 2 is located between the adjustment block 3 and the main base 1 along the first direction, and a larger space is separated between the adjustment block 3 and the main base 1 by the first deformation mechanism 2 along the first direction. The second deformation mechanism 5 on each side is located on the side of the adjustment block 3 facing the first deformation mechanism 2 along the first direction, which can make full use of the space between the main base 1 and the adjustment block 3 to arrange the second deformation mechanism 5, which is conducive to saving space.

[0080] It is understood that the position of the second deformation mechanism 5 on each side is not limited. For example, the second deformation mechanism 5 on each side can be located on the side of the adjustment block 3 that is away from the first deformation mechanism 2 along the first direction. For example, the second deformation mechanism 5 on each side can be arranged on opposite sides of the adjustment block 3 along the first direction.

[0081] In some embodiments, see Figure 4 , the first deformation mechanism 2 is an elastic member.

[0082] In the embodiment of the present application, positive stiffness is provided by an elastic member.

[0083] In some embodiments, see Figure 4 , the elastic member is an air spring.

[0084] In the embodiment of the present application, an air spring is used as an elastic member to provide positive stiffness.

[0085] Exemplarily, the elastic member may also be a metal spring extending in a spiral shape.

[0086] It is understandable that the specific structure of the first deformation mechanism 2 is not limited, as long as it can provide positive stiffness.

[0087] In some embodiments, see Figure 4 and Figure 5 The second deformation mechanism 5 is a drive cylinder, which includes a cylinder body 51, a piston body 52, and a piston rod 54. The piston body 52 is located within the cylinder body 51 to divide the space within the cylinder body 51 into two chambers 53. The piston body 52 is formed with a communication hole 521, and the two chambers 53 in the cylinder body 51 are connected through the communication hole 521. The piston rod 54 is connected to the piston body 52, and the piston rod 54 at least partially extends outside the cylinder body 51. One of the cylinder body 51 and the piston rod 54 is rotatably connected to the corresponding auxiliary base 4, and the other of the cylinder body 51 and the piston rod 54 is rotatably connected to the corresponding end of the adjustment block 3.

[0088] For example, the cross-sectional shape of the cylinder body 51 may be circular or polygonal.

[0089] For example, the piston body 52 may be made of rubber or silicone.

[0090] The piston body 52 is dynamically sealed with the cylinder body 51 so that the piston body 52 divides the space in the cylinder body 51 into two chambers 53 and moves in the space in the cylinder body 51 .

[0091] For example, the communicating hole 521 on the piston body 52 may be circular or polygonal in shape.

[0092] Exemplarily, the driving cylinder is an air cylinder or an oil cylinder.

[0093] In the embodiment of the present application, one of the cylinder body 51 and the piston rod 54 is rotationally connected to the corresponding auxiliary base 4, and the other of the cylinder body 51 and the piston rod 54 is rotationally connected to the corresponding end of the adjustment block 3. During the vibration of the compressor 500, the auxiliary base 4 moves relative to the adjustment block 3, so that the piston rod 54 drives the piston body 52 connected to the piston rod 54 to move within the space of the cylinder body 51. The movement of the piston rod 54 relative to the cylinder body 51 causes the second deformation mechanism 5 to produce a deformation. When the force acting on the piston rod 54 is large, the piston body 52 squeezes one of the chambers 53 of the cylinder body 51 with a large extrusion force, and the fluid in the corresponding chamber 53 is difficult to flow to the other chamber 53 in time. The fluid that is difficult to flow to the other chamber 53 in time forms a large reaction force on the piston body 52, preventing the piston body 52 from driving the piston rod 54 to move. Therefore, the displacement of the piston rod 54 relative to the cylinder body 51 is small, and the corresponding deformation of the second deformation mechanism 5 is small. When the force acting on the piston rod 54 is relatively small, the piston body 52 squeezes one of the chambers 53 of the cylinder body 51 with a relatively small extrusion force, causing the fluid in the corresponding chamber 53 to gradually flow to the other chamber 53. Because the extrusion force exerted by the piston body 52 on the chambers 53 is relatively small, the reaction force exerted by the fluid in the corresponding chamber 53 on the piston body 52 is relatively small. As the fluid in one chamber 53 gradually flows to the other chamber 53, the piston body 52 drives the piston rod 54 to move a relatively large displacement, resulting in a correspondingly large deformation of the second deformation mechanism 5. Negative stiffness is achieved by the cylinder body 51, the piston body 52, the piston rod 54, and the through-holes in the piston body 52.

[0094] It is understandable that the specific structure of the second deformation mechanism 5 with negative stiffness is not limited. Exemplarily, the second deformation mechanism 5 can be a disc spring.

[0095] In some embodiments, see Figures 2 to 4The mounting body 101 includes a mounting plate 1012 and a support platform 1013. The receiving surface 1011 is formed on the mounting plate 1012. The main base 1 and the auxiliary base 4 are both connected to the side of the mounting plate 1012 facing away from the receiving surface 1011. The support platform 1013 is respectively connected to the mounting plate 1012 and the cover 200. The support platform 1013 is located on the side of the mounting plate 1012 facing away from the receiving surface 1011. The support platform 1013 has an avoidance cavity 1113, and the vibration damper 102 is located in the avoidance cavity 1113.

[0096] For example, see Figures 2 to 4 , the mounting plate 1012 is a flat plate.

[0097] For example, see Figures 1 to 4 , the mounting plate 1012 is connected to the compressor 500 .

[0098] Illustratively, the mounting plate 1012 is welded to the compressor 500 .

[0099] Illustratively, mounting plate 1012 is spot welded to compressor 500 at three different locations.

[0100] The support platform 1013 protrudes from the mounting plate 1012 to be supported near the vibration absorber 102 .

[0101] Exemplarily, the two devices are disposed through the mounting plate 1012 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0102] Exemplarily, the starter is disposed through the mounting plate 1012 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0103] Exemplarily, the overload protector is disposed through the mounting plate 1012 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0104] Exemplarily, the cover body 200 may partially cover the avoidance cavity 1113 to shield the avoidance cavity 1113 .

[0105] Exemplarily, a hole may be opened on the cover body 200 at a position corresponding to the avoidance cavity 1113 to avoid the avoidance cavity 1113 and the shock absorber 102 in the avoidance cavity 1113 .

[0106] For example, see Figure 3 and Figure 4 The support platform 1013 is formed with a mounting hole 1213 . Bolts pass through the cover 200 , the mounting hole 1213 and the mounting plate 1012 , thereby mounting the cover 200 and the mounting plate 1012 on both sides of the support platform 1013 .

[0107] For example, see Figure 2 The cover body 200 is located on the side of the support platform 1013 away from the mounting plate 1012.

[0108] In the embodiment of the present application, since the support platform 1013 is located on the side of the mounting plate 1012 away from the receiving surface 1011, and the shock absorber 102 is located in the avoidance cavity 1113, the support platform 1013 is supported around the shock absorber 102, and the cover body 200 is connected to the support platform 1013. The support platform 1013 supported near the shock absorber 102 provides support for the cover body 200, and the cover body 200 hardly interferes with the shock absorber 102 in the avoidance cavity 1113 of the support platform 1013, which is conducive to simplifying the structure of the cover body 200.

[0109] In some embodiments, see Figure 2 and Figure 3 The mounting plate 1012 has a relief hole 1112 for avoiding the two devices of the compressor 500, and the relief hole 1112 passes through the receiving surface 1011. The support platform 1013 is located outside the relief hole 1112.

[0110] For example, see Figures 1 to 3 The two devices pass through the avoidance hole 1112 of the mounting plate 1012 so that the two devices are at least partially located in the space enclosed by the cover 200 and the vibration isolation device 100 .

[0111] The support platform 1013 is located outside the avoidance hole 1112 , and along the axial projection of the avoidance hole 1112 , the projection area of ​​the support platform 1013 and the projection area of ​​the avoidance hole 1112 do not overlap.

[0112] For example, along the axial projection of the avoidance hole 1112, the projection area of ​​the support platform 1013 and the projection area of ​​the avoidance hole 1112 are spaced apart. The projection area of ​​the support platform 1013 and the projection area of ​​the avoidance hole 1112 are spaced apart by a certain distance.

[0113] In the embodiment of the present application, the support platform 1013 is located outside the avoidance hole 1112, which reduces the possibility of interference between the support platform 1013 and the shock absorber 102 located in the avoidance cavity 1113 of the support platform 1013 and the two devices passing through the avoidance hole 1112.

[0114] In some embodiments, see Figure 2 and Figure 3 The support platforms 1013 are provided on opposite sides of the avoidance hole 1112 , and the arrangement directions of the support platforms 1013 on both sides are respectively arranged to cross the axial direction of the avoidance hole 1112 and the second direction.

[0115] For example, see Figure 3 and Figure 4 The axial direction of the avoidance hole 1112 is arranged along the direction indicated by the arrow R1 in the figure.

[0116] For example, see Figure 3 The arrangement direction of the support platforms 1013 on both sides is arranged along the direction indicated by the arrow R3 in the figure.

[0117] The arrangement directions of the support platforms 1013 on both sides are respectively arranged to cross the axial direction of the avoidance hole 1112 and the second direction, the arrangement directions of the support platforms 1013 on both sides are arranged to cross the axial direction of the avoidance hole 1112, the arrangement directions of the support platforms 1013 on both sides are arranged to cross the second direction, and the second direction is arranged to cross the axial direction of the avoidance hole 1112.

[0118] For example, see Figure 3 and Figure 4 The arrangement direction of the support platforms 1013 on both sides is perpendicular to the axial direction of the avoidance hole 1112 , the arrangement direction of the support platforms 1013 on both sides is perpendicular to the second direction, and the second direction is perpendicular to the axial direction of the avoidance hole 1112 .

[0119] For example, see Figure 3 and Figure 4 , the first direction is arranged along the axial direction of the avoidance hole 1112.

[0120] For example, see Figure 7 The cover body 200 is formed with a flange 201 , and the flange 201 is connected to the support platform 1013 .

[0121] Exemplarily, the flange 201 may cover the avoidance cavity 1113 to shield the avoidance cavity 1113 .

[0122] For example, the flange 201 may be provided with a hole at a position corresponding to the avoidance cavity 1113 to avoid the avoidance cavity 1113 and the shock absorber 102 in the avoidance cavity 1113 .

[0123] In the embodiment of the present application, since the support platforms 1013 are provided on opposite sides of the avoidance hole 1112, the second direction is respectively arranged to intersect with the arrangement direction of the support platforms 1013 on both sides and the axial direction of the avoidance hole 1112. The corresponding space of the avoidance hole 1112 in the direction intersecting with the arrangement direction of the support platforms 1013 on both sides and the axial direction of the avoidance hole 1112 can be fully utilized to arrange the adjustment block 3 that is arranged across the first deformation mechanism 2 in the second direction, which is beneficial to saving space and reducing the space occupied by the vibration isolation device 100.

[0124] In some embodiments, see Figure 6The solid line in the figure shows the static position of the second deformation mechanism 5, while the dashed line shows the offset position of the second deformation mechanism 5 from the static position in the dynamic state. In the static state, the distance between the first rotation center 6 and the second rotation center 7 is L0. When the air spring, serving as the first deformation mechanism 2, moves in the first direction Z(t), the cylinder, serving as the second deformation mechanism 5, rotates through an angle α(t), and the piston body 52 moves d(t) accordingly. The relationship between these parameters is as follows:

[0125]

[0126] In formula (1), arctan is an inverse tangent, which is one of the inverse trigonometric functions. The angle rotated by the cylinder serving as the second deformation mechanism 5 can be obtained by formula (1).

[0127]

[0128] The distance moved by the piston body 52 can be obtained by formula (2).

[0129] Under dynamic conditions, when the cylinder, serving as the second deformation mechanism 5, rotates through a certain angle, the high-pressure gas in the cylinder's rear chamber generates a force acting on the adjustment block 3. Due to the opposing arrangement of the cylinders, the horizontal components of the cylinder force cancel each other out, while the vertical component's direction is opposite to the restoring force generated by the air spring, serving as the first deformation mechanism 2, offsetting some of the spring force and thus reducing the overall dynamic stiffness of the vibration isolation device 100. The negative vertical stiffness force provided by the cylinder is expressed as FN, and its expression is:

[0130]

[0131] In formula (3):

[0132] FN is the negative stiffness force provided by the cylinder as the second deformation mechanism 5 in the vertical direction;

[0133] FQ is the total force provided by a single cylinder;

[0134] Z(t), L0 and α(t) have the same meanings as in equations (1) and (2).

[0135] The multiplication factor 4 in formula (3) is because a shock absorber 102 is respectively provided on both sides of the avoidance hole 1112 of the mounting plate 1012 , and each shock absorber 102 corresponds to two cylinders serving as the second deformation mechanism 5 .

[0136] The restoring force FS of the air spring is expressed as:

[0137] FS=GY-FK (4)

[0138] In formula (4):

[0139] GY is the force in the first direction applied to the mounting plate 1012 during the vibration of the compressor 500;

[0140] FK is the reaction force exerted by the air spring on the main base 1.

[0141] Illustratively, the air spring includes a housing, a piston located in the housing, and a telescopic rod connected to the piston.

[0142] Exemplarily, the maximum working pressure of the gas in the housing is P, the effective area of ​​the piston in the housing is A, and the force of the air spring is P*A, that is, the reaction force FK exerted by the air spring on the main base 1 is FK=P*A.

[0143] Under the quasi-zero stiffness condition, the relationship between the system restoring force FX, the restoring force FS of the air spring, and the negative stiffness force FN provided by the cylinder as the second deformation mechanism 5 in the first direction is:

[0144] FX=FS-FN (5)

[0145] The system resilience is obtained through formula (5).

[0146] For example, the maximum working pressure of the gas in the air spring housing is 400 Pa, and the working dimension of the air spring along the first direction is 1 to 10 mm. The diameter of the air spring is 6 mm. The distance L0 between the first rotation center 6 and the second rotation center 7 of the air spring in a static state is 7.7 mm. The maximum rotation angle of the air spring is 15°, and the area of ​​the cylinder 51 is 10 mm. 2 , the maximum displacement of the piston rod 54 is 1.8 mm.

[0147] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A shock absorber, characterized in that: include: Main base; a first deformation mechanism having positive stiffness, wherein one end of the first deformation mechanism is mounted on the main base; an adjustment block connected to the other end of the first deformation mechanism, wherein the adjustment block and the main base are arranged in a first direction, and the adjustment block is arranged on opposite sides of the first deformation mechanism along a second direction, wherein the second direction is arranged to intersect the first direction; Auxiliary bases, each of which is provided on two opposite sides of the main base along the second direction; The second deformation mechanism has negative stiffness. The auxiliary base on each side is correspondingly provided with the second deformation mechanism. The second deformation mechanism on each side is rotatably connected to the corresponding ends of the auxiliary base and the adjustment block respectively.

2. The shock absorber according to claim 1, characterized in that The center of rotation of the second deformation mechanism relative to the corresponding auxiliary base is the first rotation center, and the center of rotation of the second deformation mechanism relative to the corresponding end of the adjustment block is the second rotation center. In a static state, the first rotation center and the second rotation center are arranged along the second direction, and the first direction is perpendicular to the second direction.

3. The shock absorber according to claim 1, characterized in that The center of rotation of the second deformation mechanism relative to the corresponding auxiliary base is the first rotation center, and the center of rotation of the second deformation mechanism relative to the corresponding end of the adjustment block is the second rotation center. Along the second direction, the first rotation centers on both sides are located between the second rotation centers on both sides.

4. The vibration absorber according to any one of claims 1 to 3, characterized in that: The second deformation mechanism on each side is located on a side of the adjustment block facing the first deformation mechanism along the first direction.

5. The vibration absorber according to any one of claims 1 to 3, characterized in that: The first deformation mechanism is an elastic member, and the elastic member is an air spring.

6. The vibration absorber according to any one of claims 1 to 3, characterized in that: The second deformation mechanism is a drive cylinder, and the drive cylinder includes: Cylinder body; A piston body is located in the cylinder body to divide the space in the cylinder body into two chambers, and the piston body is formed with a communication hole, and the two chambers in the cylinder body are connected through the communication hole; A piston rod is connected to the piston body, the piston rod at least partially extending out of the cylinder body, one of the cylinder body and the piston rod is rotatably connected to the corresponding auxiliary base, and the other of the cylinder body and the piston rod is rotatably connected to the corresponding end of the adjustment block.

7. A vibration isolation device, characterized in that: include: The mounting body has a receiving surface for receiving the vibration of the compressor. ； According to the vibration absorber according to any one of claims 1 to 6, the main base and the auxiliary base are both connected to a side of the mounting body facing away from the receiving surface.

8. A two-device cover, characterized in that: include: Cover body; According to the vibration isolation device according to claim 7, the cover is installed on a side of the installation body facing away from the receiving surface.

9. The two-device cover according to claim 8, characterized in that: The installation body includes: a mounting plate, the receiving surface being formed on the mounting plate, the mounting plate having a relief hole for evading the two devices of the compressor, the relief hole penetrating the receiving surface, the main base and the auxiliary base being connected to a side of the mounting plate facing away from the receiving surface; The support platform is respectively connected to the mounting plate and the cover body, the support platform is located on the side of the mounting plate away from the receiving surface, the support platform has an avoidance cavity, the shock absorber is located in the avoidance cavity, the support platform is located on the outside of the avoidance hole, and the support platforms are arranged on opposite sides of the avoidance hole. The arrangement directions of the support platforms on both sides are respectively arranged to cross the axial direction of the avoidance hole and the second direction.

10. A refrigeration device, characterized in that: include: Refrigeration host; A compressor, installed on the refrigeration host; Two devices, installed on the compressor, including a starter for starting the compressor and an overload protector for protecting the compressor; According to the two-device cover according to claim 8 or 9, the side of the mounting body facing the receiving surface is connected to the compressor, and the two-device cover is provided on the two devices.

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