CN220749702U - Hydraulic supporting device with flexible damping function - Google Patents
Hydraulic supporting device with flexible damping function Download PDFInfo
- Publication number
- CN220749702U CN220749702U CN202322359739.9U CN202322359739U CN220749702U CN 220749702 U CN220749702 U CN 220749702U CN 202322359739 U CN202322359739 U CN 202322359739U CN 220749702 U CN220749702 U CN 220749702U
- Authority
- CN
- China
- Prior art keywords
- block
- support device
- shock absorbing
- rod
- hydraulic support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The utility model provides a hydraulic support device with a flexible damping function, which relates to the technical field of hydraulic support and comprises: a hydraulic support device body; the mounting plate is arranged below the hydraulic supporting device body, and at least one pair of movable rods are arranged below the mounting plate; the bottom plate is arranged below the mounting plate, and a first buffer structure is arranged between the bottom plate and the mounting plate; at least one pair of baffles arranged above the bottom plate, wherein each baffle is matched with the movable rod through a second buffer structure; the problem of among the prior art hydraulic support device's bottom and bottom plate rigid connection, unable shock attenuation and buffering to hydraulic support device top atress is solved.
Description
Technical Field
The utility model belongs to the technical field of hydraulic support, and particularly relates to a hydraulic support device with a flexible damping function.
Background
A hydraulic support device is a device that uses the pressure of a liquid to support a weight or adjust the height of a machine. The hydraulic support device is generally composed of a hydraulic cylinder, a hydraulic pipeline, a hydraulic oil tank, a control valve and the like. The hydraulic support device works on the principle that the incompressibility and the fluidity of liquid are utilized, and the hydraulic cylinder is used for converting the pressure of the liquid into mechanical force so as to support heavy objects or adjust the height of machine equipment. The hydraulic supporting device has the advantages of large supporting force, high adjusting precision, good stability, low noise and the like, and is widely applied to the fields of mechanical equipment, automobiles, aerospace, constructional engineering and the like.
The bottom of the existing hydraulic supporting device is rigidly connected with the bottom plate, and when the upper part of the hydraulic supporting device is stressed, the bottom plate cannot absorb and buffer the stress of the bottom plate, so that the vibration of parts or devices above the hydraulic supporting device is obvious easily.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, provides a hydraulic supporting device with a flexible damping function, and solves the problem that the bottom of the hydraulic supporting device in the prior art is rigidly connected with a bottom plate and cannot damp and cushion the stress above the hydraulic supporting device.
In order to achieve the above object, the present utility model provides a hydraulic support device having a flexible shock absorbing function, comprising:
a hydraulic support device body;
the mounting plate is arranged below the hydraulic supporting device body, and at least one pair of movable rods are arranged below the mounting plate;
the bottom plate is arranged below the mounting plate, and a first buffer structure is arranged between the bottom plate and the mounting plate;
and at least one pair of baffles arranged above the bottom plate, wherein each baffle is matched with the movable rod through a second buffer structure.
Optionally, the hydraulic support device body comprises a hydraulic cylinder, a hydraulic rod of the hydraulic cylinder extends upwards, and a support plate is arranged at the upper end of the hydraulic rod.
Optionally, the first buffer structure includes a rubber block, and the rubber block is disposed between the middle portion of the mounting plate and the bottom plate.
Optionally, the first buffer structure further comprises at least one pair of first damping springs, and the pair of first damping springs are respectively arranged on two opposite sides of the rubber block.
Optionally, each first damping spring is movably provided with a guide post in a penetrating manner, one of the lower side of the mounting plate and the upper side of the bottom plate is provided with a guide hole, the guide post is connected with the other one of the lower side of the mounting plate and the upper side of the bottom plate, and the guide post is in sliding fit with the guide hole.
Optionally, the second buffer structure includes:
one end of the fixed rod is connected with the baffle;
the wedge block is arranged at the other end of the fixed rod in a sliding manner;
the second damping spring is sleeved on the fixed rod and is positioned between the baffle and the wedge block, and when the movable rod moves downwards along with the mounting plate, the movable rod is contacted with the wedge surface of the wedge block, so that the wedge block moves towards the direction close to the baffle and compresses the second damping spring.
Optionally, one end of the wedge block is provided with the wedge face, the other end of the wedge block is provided with a sliding hole, and the fixing rod is arranged in the sliding hole in a sliding penetrating mode.
Optionally, the second cushioning structure further includes a guiding mechanism, the guiding mechanism including:
the sliding rail is arranged on the upper side of the bottom plate;
the sliding strip is in sliding fit with the sliding rail;
the threaded rod is in threaded connection with the sliding bar, the upper end of the threaded rod extends upwards, a fixing groove is formed in the lower side of the wedge-shaped block, and the upper end of the threaded rod is in plug-in fit with the fixing groove.
Optionally, a gap is provided between the inner periphery of the sliding hole and the outer periphery of the fixing rod, and the second buffer structure further comprises a dismounting mechanism, and the dismounting mechanism comprises:
the movable ring is sleeved at one end of the fixed rod, which is close to the wedge block, in a sliding manner, and the wedge block is contacted with the second damping spring through the movable ring;
the connecting block is arranged on one side of the movable ring, which is far away from the second damping spring, and a mounting block is arranged on the surface of one side of the connecting block, which is close to the wedge block;
the installation groove is formed in the upper side of the wedge-shaped block, the installation groove is in plug-in fit with the installation block, and the gap can accommodate the installation block to be separated from the installation groove.
Optionally, the periphery of the lower end of the movable rod is provided with a conical surface, and the conical surface is in contact with the wedge surface of the wedge block.
The utility model provides a hydraulic supporting device with a flexible damping function, which has the beneficial effects that: this hydraulic supporting device with flexible shock-absorbing function is provided with the mounting panel in the below of hydraulic supporting device body, is provided with first buffer structure between mounting panel and bottom plate, realizes first heavy buffering to be provided with the movable rod in the below of mounting panel, be provided with the baffle in the top of bottom plate, be provided with second buffer structure on the baffle, cooperate with second buffer structure through the movable rod, realize the double buffering cushioning effect when realizing the atress to the hydraulic supporting device body.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular descriptions of exemplary embodiments of the utility model as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the utility model.
Fig. 1 shows a schematic structural view of a hydraulic support device with a flexible shock absorbing function according to an embodiment of the present utility model.
Fig. 2 shows an enlarged schematic view at a of fig. 1.
Fig. 3 shows a schematic view of a second cushioning structure of a hydraulic support device with flexible shock absorbing function according to one embodiment of the present utility model.
Fig. 4 shows an enlarged schematic view at B of fig. 3.
Fig. 5 shows an enlarged schematic view at C of fig. 3.
Reference numerals illustrate:
1. a mounting plate; 2. a movable rod; 3. a bottom plate; 4. a baffle; 5. a hydraulic cylinder; 6. a hydraulic rod; 7. a support plate; 8. a rubber block; 9. a first damper spring; 10. a guide post; 11. a fixed rod; 12. wedge blocks; 13. a second damper spring; 14. a sliding hole; 15. a slide rail; 16. a slide bar; 17. a threaded rod; 18. a fixing groove; 19. a movable ring; 20. a connecting block; 21. a mounting block; 22. and a mounting groove.
Detailed Description
Preferred embodiments of the present utility model will be described in more detail below. While the preferred embodiments of the present utility model are described below, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
As shown in fig. 1 to 5, the present utility model provides a hydraulic support device having a flexible shock absorbing function, comprising:
a hydraulic support device body;
the mounting plate 1 is arranged below the hydraulic supporting device body, and at least one pair of movable rods 2 are arranged below the mounting plate 1;
the bottom plate 3 is arranged below the mounting plate 1, and a first buffer structure is arranged between the bottom plate 3 and the mounting plate 1;
at least one pair of baffles 4 is arranged above the bottom plate 3, and each baffle 4 is matched with the movable rod 2 through a second buffer structure.
Specifically, in order to solve the problem that the bottom of the hydraulic supporting device in the prior art is rigidly connected with the bottom plate 3, the stress above the hydraulic supporting device cannot be damped and buffered; the hydraulic supporting device with the flexible damping function is characterized in that the mounting plate 1 is arranged below the hydraulic supporting device body, the first buffer structure is arranged between the mounting plate 1 and the bottom plate 3 to realize first heavy buffer, the movable rod 2 is arranged below the mounting plate 1, the baffle 4 is arranged above the bottom plate 3, the second buffer structure is arranged on the baffle 4, and the second heavy buffer is realized through the cooperation of the movable rod 2 and the second buffer structure, so that the double buffer damping effect on the stressed hydraulic supporting device body is realized.
In this embodiment, a pair of movable bars 2 may be symmetrically disposed at both left and right sides of the first buffer structure.
In other embodiments, two or more pairs of movable rods 2 may be provided, for example, two pairs of movable rods 2 may be provided, where one pair of movable rods 2 may be symmetrically provided on both left and right sides of the first buffer structure, and the other pair of movable rods 2 may be symmetrically provided on both front and rear sides of the first buffer structure.
Similarly, in the present embodiment, the baffle plates 4 are provided in a pair, and the pair of baffle plates 4 are provided at both right and left ends above the bottom plate 3, respectively.
In other embodiments, two or more pairs of baffles 4 may be provided, and each baffle 4 is connected to a second buffer structure, and each second buffer structure is connected to one movable rod 2 to achieve a buffering effect.
Alternatively, the hydraulic support device body includes a hydraulic cylinder 5, a hydraulic rod 6 of the hydraulic cylinder 5 extends upward, and an upper end of the hydraulic rod 6 is provided with a support plate 7.
Specifically, the hydraulic cylinder 5 is driven to extend upwards or retract downwards through the hydraulic rod 6, so that the supporting plate 7 is driven to lift, and the height of parts or mechanical products can be adjusted.
Optionally, the first cushioning structure comprises a rubber block 8, the rubber block 8 being arranged between the middle of the mounting plate 1 and the bottom plate 3.
Specifically, the rubber block 8 is arranged in the middle of the mounting plate 1 and the bottom plate 3, the center line of the rubber block can coincide with the center line of the mounting plate 1 and the center line of the bottom plate 3, and the buffering and shock absorption are realized by using the flexibility and elasticity of rubber materials.
Optionally, the first cushioning structure further includes at least a pair of first damper springs 9, the pair of first damper springs 9 being disposed on opposite sides of the rubber block 8, respectively.
Specifically, each pair of damping springs are symmetrically arranged on two sides of the rubber block 8, and play a role in buffering and damping together with the rubber block 8.
In the present embodiment, the first damper springs 9 are provided with a pair.
In other embodiments, the first damper springs 9 may be provided in two or more pairs.
Optionally, a guiding post 10 is movably arranged in each first damping spring 9, one of the lower side of the mounting plate 1 and the upper side of the bottom plate 3 is provided with a guiding hole, the guiding post 10 is connected with the other of the lower side of the mounting plate 1 and the upper side of the bottom plate 3, and the guiding post 10 is in sliding fit with the guiding hole.
Specifically, the setting of guide post 10 plays spacing and the effect of direction to first damping spring 9 for first damping spring 9 can compress along vertical and rebound, avoids taking place the skew in its horizontal direction.
Optionally, the second buffer structure comprises:
the fixed rod 11, one end of the fixed rod 11 is connected with the baffle 4;
a wedge block 12, the wedge block 12 being slidably disposed at the other end of the fixing rod 11;
the second damping spring 13 is sleeved on the fixed rod 11 and is positioned between the baffle plate 4 and the wedge block 12, and when the movable rod 2 moves downwards along with the mounting plate 1, the movable rod 2 contacts with the wedge surface of the wedge block 12, so that the wedge block 12 moves towards the direction close to the baffle plate 4 and compresses the second damping spring 13.
Specifically, the second buffer structure is matched with the movable rod 2 on the mounting plate 1, when the supporting plate 7 is pressed, and the movable rod 2 moves downwards along with the mounting plate 1, the movable rod 2 pushes the wedge surface of the wedge block 12, so that the wedge block 12 moves along the axis direction of the fixed rod 11 towards the direction close to the baffle plate 4, and the second damping spring 13 is compressed, so that the second damping spring plays roles of buffering and damping.
Alternatively, one end of the wedge block 12 is provided with a wedge surface, the other end of the wedge block 12 is provided with a sliding hole 14, and the fixing rod 11 is slidably inserted into the sliding hole 14.
Specifically, one end of the wedge block 12 is provided with an inclined plane to form a wedge surface, the wedge surface is contacted with the movable rod 2 which moves vertically, so that the wedge block 12 moves, the other end of the wedge block 12 is provided with a sliding hole 14 to form a sleeve shape, and the sleeve shape can be sleeved on the fixed rod 11 and slide along the fixed rod 11.
Optionally, the second cushioning structure further includes a guide mechanism, the guide mechanism including:
a slide rail 15, the slide rail 15 being arranged on the upper side of the bottom plate 3;
a slide bar 16, wherein the slide bar 16 is in sliding fit with the slide rail 15;
the threaded rod 17, the threaded rod 17 with the draw runner 16 threaded connection, and the upper end of threaded rod 17 upwards extends, and the downside of wedge 12 is provided with fixed slot 18, and the upper end and the fixed slot 18 grafting cooperation of threaded rod 17.
Specifically, the guide mechanism guides the movement of the wedge block 12 to move along the axial direction of the fixed rod 11, the sliding rail 15 is arranged on the bottom plate 3 along the axial direction of the fixed rod 11, the sliding bar 16 is arranged above the sliding rail 15 in a sliding manner, and the upper end of the threaded rod 17 on the sliding bar 16 can be inserted into the fixed groove 18 at the lower side of the wedge block 12 to realize synchronous sliding of the sliding bar 16 and the wedge block 12.
In this embodiment, the lower end of the sliding bar 16 is slidably matched with the sliding rail 15, the upper end of the sliding bar 16 is provided with a bending portion to form an L-shaped structure, the threaded rod 17 is vertically threaded in the bending portion, and the lower end of the threaded rod 17 is provided with a screw head so as to screw the threaded rod 17.
Optionally, a gap is provided between the inner periphery of the sliding hole 14 and the outer periphery of the fixing rod 11, and the second buffer structure further includes a dismounting mechanism including:
the movable ring 19 is sleeved on one end of the fixed rod 11 close to the wedge block 12 in a sliding manner, and the wedge block 12 is contacted with the second damping spring 13 through the movable ring 19;
a connection block 20 arranged on one side of the movable ring 19 away from the second damping spring 13, and a mounting block 21 arranged on the surface of one side of the connection block 20 close to the wedge block 12;
the installation groove 22 is formed in the upper side of the wedge-shaped block 12, the installation groove 22 is in plug-in fit with the installation block 21, and the installation block 21 can be accommodated in the gap to be separated from the installation groove 22.
Specifically, the movable ring 19 is slidably sleeved on the periphery of the fixed rod 11, and can slide along the axial direction of the fixed rod 11 relative to the fixed rod 11, the wedge block 12 is contacted with the second damping spring 13 through the movable ring 19, the wedge block 12 is detachably connected with the movable ring 19, the connecting block 20 is connected on the movable ring 19, the connecting block 20 is embedded into the mounting groove 22 on the wedge block 12 through the mounting block 21 thereon, so that the connection between the wedge block and the wedge block 12 can be realized, and because a gap is arranged between the inner periphery of the sliding hole 14 and the periphery of the fixed rod 11, and the gap can accommodate the mounting block 21 to be separated from the mounting groove 22, the mounting block 21 can be clamped into the mounting groove 22 during mounting, then the wedge block 12 can be moved upwards, and can be inserted into the fixing groove 18 through the upward movement of the threaded rod 17, the mounting can be moved downwards during dismounting, and the wedge block 12 can be separated from the mounting groove 22, so that the dismounting can be realized.
Optionally, the lower end periphery of the movable rod 2 is provided with a tapered surface, which contacts the wedge surface of the wedge block 12.
Specifically, the conical surface can increase the contact area between the movable rod 2 and the wedge surface, reduce the pressure intensity and prolong the service life of the wedge block 12.
In summary, when the hydraulic supporting device with the flexible damping function is used once, corresponding parts or mechanical products are firstly arranged above the supporting plate 7, and when the height of the parts or the mechanical products needs to be adjusted, the hydraulic rod 6 is driven to move up and down through the hydraulic cylinder 5, so that the supporting plate 7 above the hydraulic rod 6 can be driven to move up and down, and the height of the parts or the mechanical products is adjusted; when the mounting plate 1 is stressed, the rubber block 8 and the first damping spring 9 can buffer and damp the mounting plate, meanwhile, the mounting plate 1 is stressed to move downwards to drive the movable rod 2 to move downwards, so that the movable rod 2 extrudes the wedge block 12, then the wedge block 12 moves along the fixed rod 11 towards the direction close to the baffle 4, the second damping spring 13 is extruded, and the second damping spring 13 plays a role in buffering the stress of the wedge block 12, so that the dual damping of the stress of the support plate 7 is realized. After the wedge block 12 is used for a long time, after the wedge surface of the wedge block is worn by the movable rod 2, the threaded rod 17 is rotated to enable the threaded rod 17 to be separated from the fixed groove 18, and then the wedge block 12 moves downwards to enable the mounting block 21 to be separated from the mounting groove 22, so that the wedge block 12 is dismounted; when the wedge block 12 is installed, the installation groove 22 on the wedge block 12 is aligned with the installation block 21 below the connecting block 20, the wedge block 12 moves upwards to be in butt joint with the connecting block 20, then the fixing groove 18 below the wedge block 12 is aligned with the threaded rod 17 on the sliding bar 16, then the threaded rod 17 is rotated, the threaded rod 17 moves upwards to be in plug-in fit with the fixing groove 18, and then the installation of the wedge block 12 can be completed, so that the replacement of the wedge block 12 is completed.
The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. A hydraulic support device with flexible shock absorbing function, comprising:
a hydraulic support device body;
the mounting plate is arranged below the hydraulic supporting device body, and at least one pair of movable rods are arranged below the mounting plate;
the bottom plate is arranged below the mounting plate, and a first buffer structure is arranged between the bottom plate and the mounting plate;
and at least one pair of baffles arranged above the bottom plate, wherein each baffle is matched with the movable rod through a second buffer structure.
2. The hydraulic support device with a flexible shock absorbing function according to claim 1, wherein the hydraulic support device body includes a hydraulic cylinder, a hydraulic rod of the hydraulic cylinder extends upward, and an upper end of the hydraulic rod is provided with a support plate.
3. The hydraulic support device with a flexible shock absorbing function according to claim 1, wherein the first shock absorbing structure includes a rubber block disposed between a middle portion of the mounting plate and the bottom plate.
4. A hydraulic support device with a flexible shock absorbing function as set forth in claim 3, wherein said first shock absorbing structure further includes at least a pair of first shock absorbing springs, one pair of said first shock absorbing springs being disposed on opposite sides of said rubber block, respectively.
5. The hydraulic support device with a flexible shock absorbing function according to claim 4, wherein one guide post is movably penetrated inside each of the first shock absorbing springs, one of the lower side of the mounting plate and the upper side of the bottom plate is provided with a guide hole, the guide post is connected with the other one of the lower side of the mounting plate and the upper side of the bottom plate, and the guide post is slidably engaged with the guide hole.
6. The hydraulic support device with a flexible shock absorbing function according to claim 1, wherein the second shock absorbing structure includes:
one end of the fixed rod is connected with the baffle;
the wedge block is arranged at the other end of the fixed rod in a sliding manner;
the second damping spring is sleeved on the fixed rod and is positioned between the baffle and the wedge block, and when the movable rod moves downwards along with the mounting plate, the movable rod is contacted with the wedge surface of the wedge block, so that the wedge block moves towards the direction close to the baffle and compresses the second damping spring.
7. The hydraulic support device with the flexible damping function according to claim 6, wherein one end of the wedge block is provided with the wedge surface, the other end of the wedge block is provided with a sliding hole, and the fixing rod is slidably inserted into the sliding hole.
8. The hydraulic support device with compliant damping function according to claim 7, wherein the second damping structure further comprises a guide mechanism comprising:
the sliding rail is arranged on the upper side of the bottom plate;
the sliding strip is in sliding fit with the sliding rail;
the threaded rod is in threaded connection with the sliding bar, the upper end of the threaded rod extends upwards, a fixing groove is formed in the lower side of the wedge-shaped block, and the upper end of the threaded rod is in plug-in fit with the fixing groove.
9. The hydraulic support device with a flexible shock absorbing function according to claim 8, wherein a gap is provided between an inner periphery of the slide hole and an outer periphery of the fixing rod, the second buffer structure further includes a dismounting mechanism including:
the movable ring is sleeved at one end of the fixed rod, which is close to the wedge block, in a sliding manner, and the wedge block is contacted with the second damping spring through the movable ring;
the connecting block is arranged on one side of the movable ring, which is far away from the second damping spring, and a mounting block is arranged on the surface of one side of the connecting block, which is close to the wedge block;
the installation groove is formed in the upper side of the wedge-shaped block, the installation groove is in plug-in fit with the installation block, and the gap can accommodate the installation block to be separated from the installation groove.
10. The hydraulic support device with a flexible shock absorbing function according to claim 6, wherein the lower end periphery of the movable rod is provided with a tapered surface, the tapered surface being in contact with the wedge surface of the wedge block.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202322359739.9U CN220749702U (en) | 2023-08-31 | 2023-08-31 | Hydraulic supporting device with flexible damping function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202322359739.9U CN220749702U (en) | 2023-08-31 | 2023-08-31 | Hydraulic supporting device with flexible damping function |
Publications (1)
Publication Number | Publication Date |
---|---|
CN220749702U true CN220749702U (en) | 2024-04-09 |
Family
ID=90556162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202322359739.9U Active CN220749702U (en) | 2023-08-31 | 2023-08-31 | Hydraulic supporting device with flexible damping function |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN220749702U (en) |
-
2023
- 2023-08-31 CN CN202322359739.9U patent/CN220749702U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN211947929U (en) | Bridge damping device | |
CN208415077U (en) | A kind of bridge aseismic devices | |
CN210505148U (en) | Buffer device for building elevator car | |
CN109778684B (en) | Bridge damping support | |
CN110552994A (en) | Damping base for reciprocating pump | |
CN220749702U (en) | Hydraulic supporting device with flexible damping function | |
CN213256691U (en) | Mounting base of stamping die | |
CN214461380U (en) | Bidirectional horizontal adjustable tuned mass damper | |
CN114370586A (en) | Damping supporting seat for mechanical equipment | |
CN216471648U (en) | Vibration/noise reduction type elevator pressure guide plate | |
CN218933409U (en) | Earthquake-resistant building foundation structure | |
CN218040273U (en) | Box shock attenuation cubical switchboard | |
CN116526740A (en) | Shock-absorbing structure and motor mounting seat with protection function | |
CN216237913U (en) | Lateral damping device under rail of railway bridge | |
CN216195477U (en) | Steel construction damping support | |
CN214984700U (en) | Suspension shock absorber buffer structure | |
CN111853149B (en) | Longitudinal rigid anti-seismic support system for bridge frame | |
CN116142918A (en) | Combined rubber damping structure for elevator car | |
CN212245810U (en) | Large-tonnage goods lift damper | |
CN217488044U (en) | Automatic change low vibrations slide rail | |
CN220813406U (en) | Steel construction with buffering characteristic | |
CN221629160U (en) | Water pump base | |
CN221070601U (en) | Motor mounting structure in elevator electric traction system | |
CN217019314U (en) | Mounting device for steel member bracket | |
CN221162380U (en) | Mechanical vehicle seat damping device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |