A floor spring with adaptive horizontal effect

By designing an adaptive horizontal floor spring and using a connecting rod and leveling assembly to achieve synchronous adjustment, the problems of cumbersome installation and skew position of the floor spring are solved, and the installation stability and service life are improved.

CN115788205BActive Publication Date: 2025-09-23安徽海达门控设备有限公司
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Patent Information

Application Number
CN202211504132.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-29
Publication Date
2025-09-23
Estimated Expiration
2042-11-29

AI Technical Summary

Technical Problem

Existing floor springs require repeated adjustments during installation, which is time-consuming and labor-intensive, and can easily lead to skewed positions, affecting installation stability and service life.

Method used

A floor spring with an adaptive leveling effect is designed. By setting a connecting rod and a leveling component, the synchronous rotation of the front and rear connecting rods and the bevel gear is achieved, the adjustment process is simplified, and the stability of the installation is ensured by the lateral and longitudinal calibrators.

Benefits of technology

The installation process of the floor spring is simplified, the installation stability and service life are improved, the position is avoided to be skewed, and the operation is convenient, saving time and effort.

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Abstract

The present invention relates to the technical field of floor spring leveling, and discloses a floor spring with an adaptive leveling effect, comprising a floor spring body, an inner shell provided on the outside of the floor spring body, an outer shell provided on the outside of the inner shell, a leveling assembly provided on the surface of the outer shell, a front connecting rod passing through the interior of the front side of the inner shell, both ends of the front connecting rod extending to the outside of the side wall of the inner shell, and both ends of the front connecting rod being fixedly connected to front side abutment blocks, a rear connecting rod passing through the interior of the rear side of the inner shell, both ends of the rear connecting rod also extending to the outside of the side wall of the inner shell, and both ends of the rear connecting rod being fixedly connected to rear side abutment blocks. By providing a connecting rod, the front bevel gear and the rear bevel gear can be controlled to rotate synchronously, completing the lateral displacement of the inner shell and the floor spring body. The adjustment method is simple, and there is no need to use a small wrench to repeatedly rotate back and forth to adjust the position of the floor spring body, which simplifies the operation and saves time and effort.
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Description

Technical Field

[0001] The invention relates to the technical field of floor spring leveling, in particular to a floor spring with self-adaptive leveling effect. Background Art

[0002] The floor spring is a commonly used hardware accessory for revolving doors, which is used to realize the function of rotating the door leaf. The device that compresses the spring of the floor spring is a worm gear, which can rotate forward and reverse, so the door installed with the floor spring has the function of opening in two directions, while the ordinary door closer can only open the door in one direction. The current common floor spring needs to be installed by digging a hole groove in the ground or reserving a hole groove during ground construction, so that the floor spring shell can be installed inside the hole groove. The floor spring is installed inside the shell, and the floor spring needs to be fine-tuned when installing the door leaf to ensure that the axis of the floor spring and the top clamping shaft installed inside the door frame correspond to each other. When fine-tuning the existing floor spring, first loosen the small bolt that the side of the floor spring abuts against the inner wall of the shell, and then adjust the position of the floor spring horizontally so that the floor spring rotating shaft and the clamping shaft inside the door frame are adjusted to the same vertical position, and then use the head of the small bolt to abut against the shell again. The inner wall of the door leaf is also inconvenient to install, and the small bolts used for abutment are adjusted by a small wrench. The small wrench needs to be removed and re-inserted into the head of the small bolt every time it is turned half a circle to allow the small bolt to rotate. Repeated operations can easily cause the position of the floor spring itself to shift to a certain extent. Therefore, it is often necessary to adjust it multiple times when installing the door, which is extremely cumbersome, time-consuming and labor-intensive. Moreover, the floor spring itself is long, and the two ends of the existing floor spring can only be adjusted separately when fine-tuning. It is also easy for the floor spring to be skewed in the position inside the shell, resulting in the head surface of the small bolt not being able to fully contact the inner wall of the shell.

[0003] Therefore, those skilled in the art provide a floor spring with an adaptive horizontal effect to solve the problems raised in the above background technology. Summary of the Invention

[0004] The object of the present invention is to provide a floor spring with an adaptive leveling effect to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A floor spring with an adaptive leveling effect comprises a floor spring body, an inner shell is provided on the outside of the floor spring body, an outer shell is provided on the outside of the inner shell, an outer shell cavity is provided on the upper part of the outer shell, the inner shell is placed inside the inner shell cavity, a cover plate hole is provided on the upper surface of the outer shell, the cover plate is fixed to the upper side of the outer shell with screws, a leveling component is provided on the surface of the outer shell, a front connecting rod is passed through the front interior of the inner shell, both ends of the front connecting rod extend to the outside of the side wall of the inner shell, both ends of the front connecting rod are fixedly connected to front side abutment blocks, a rear connecting rod is passed through the rear interior of the inner shell, both ends of the rear connecting rod also extend to the On the outside of the side wall of the inner shell, both ends of the rear connecting rod are fixed with a rear side abutment block, and the left side wall of the inner cavity of the outer shell is provided with two outer shell inner cavity wall abutment grooves, and a movable plate is installed inside the inner cavity of the outer shell, and the side surface of the movable plate close to the outer shell inner cavity wall abutment groove is provided. The positions of the two movable plate abutment grooves and the two outer shell inner cavity wall abutment grooves correspond to each other, and the rear side abutment block and the front side abutment block located on the left side of the inner shell are respectively clamped in the inside of the two outer shell inner cavity wall abutment grooves, and the rear side abutment block and the front side abutment block located on the right side of the inner shell are respectively clamped in the inside of the two movable plate abutment grooves.

[0007] As a further solution of the present invention: the front and rear ends of the movable plate are fixedly connected with movable plate extension ends, the front and rear side walls of the shell inner cavity are provided with shell inner wall extension grooves, and the movable plate extension ends are slidably connected to the inside of the shell inner wall extension grooves.

[0008] As a further solution of the present invention: a clamping groove is formed between the movable plate and the right side wall of the inner cavity of the shell, a clamping plate is clamped inside the clamping groove, a pulling hole is opened on the front end surface of the clamping plate, and the lower end of the clamping plate is arranged in an inclined surface.

[0009] As a further solution of the present invention: the rear connecting rod and the front connecting rod are equal in length, the rear side abutment block and the front side abutment block are equal in thickness, and the left side surfaces of the rear side abutment block and the front side abutment block located on the left side of the inner shell are located in the same plane.

[0010] As a further solution of the present invention: the maximum distance between the two rear side abutment blocks is equal to the minimum distance between the inner surface of the abutment groove of the inner cavity wall of the shell and the inner surface of the abutment groove of the movable plate, and the maximum width of the clamping groove is equal to the thickness of the upper part of the clamping plate.

[0011] As a further solution of the present invention: a rear bevel gear and a front bevel gear are respectively provided inside the inner shell, the rear bevel gear is sleeved on the surface of the rear connecting rod, and the interior of the rear bevel gear is threadedly connected to the surface of the rear connecting rod, the front bevel gear is sleeved on the surface of the front connecting rod, and the interior of the front bevel gear is threadedly connected to the surface of the front connecting rod, a connecting rod is installed inside the inner shell, the rear end of the connecting rod is fixedly connected to the rear connecting gear, the rear connecting gear and the rear bevel gear are meshed with each other, and the front end of the connecting rod is fixedly connected to the front connecting gear, the front connecting gear and the front bevel gear are meshed with each other.

[0012] As a further solution of the present invention: an adjusting screw is installed on the upper surface of the inner shell, the lower end of the adjusting screw extends into the interior of the inner shell, the lower end of the inner shell is fixedly connected to an adjusting gear, and the adjusting gear and the front bevel gear are engaged with each other.

[0013] As a further solution of the present invention: the front bevel gear and the rear bevel gear are accessories of the same specification, and the rear continuously rotating gear and the front continuously rotating gear are accessories of the same specification.

[0014] As a further solution of the present invention: the leveling assembly includes a transverse horizontal calibrator and a longitudinal horizontal calibrator, the transverse horizontal calibrator and the longitudinal horizontal calibrator are respectively embedded in the upper surface of the inner shell, the transverse horizontal calibrator and the longitudinal horizontal calibrator are both bubble levels, and grooves are provided at the four corners of the upper surface of the outer shell, and leveling bolts are vertically installed inside the grooves.

[0015] As a further solution of the present invention: a pouring filler groove is vertically opened on the side of the inner shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting a connecting rod and ensuring that the rear connecting rod and the front connecting rod are of equal length, the rear side abutment block and the front side abutment block are of equal thickness, the front bevel gear and the rear bevel gear are not accessories of the same specification, and the rear connecting gear and the front connecting gear are accessories of the same specification, the front bevel gear and the rear bevel gear can be controlled to rotate synchronously when the adjusting screw is rotated to complete the lateral displacement of the inner shell and the floor spring body, and the adjustment method is simple, and there is no need to use a small wrench to repeatedly rotate back and forth to adjust the position of the floor spring body, which simplifies the operation, saves time and effort, and the synchronous movement of the front and rear sides of the floor spring body can also avoid the occurrence of skewness when one side is adjusted and the other side is not adjusted, effectively avoiding the problem of skew installation of the floor spring body, improving the stability of the installation of the floor spring body, and thus extending the service life of the floor spring body.

[0018] 2. Set up the horizontal level calibrator and the vertical level calibrator, and use the leveling screws to level the shell, which is easy to operate. The pouring filling groove is opened to fill the pouring material into the ground hole groove and the bottom of the shell to fill the pouring material, which is convenient for fixing the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a floor spring with adaptive horizontal effect;

[0020] Figure 2 This is a structural diagram of a floor spring with adaptive leveling effect, in which the main body of the floor spring is installed on the inner shell;

[0021] Figure 3 This is an enlarged view of the outer shell of a floor spring with an adaptive leveling effect;

[0022] Figure 4 This is an enlarged view of the inner shell of a floor spring with adaptive leveling effect;

[0023] Figure 5 It is a side view of the housing of a floor spring with an adaptive leveling effect;

[0024] Figure 6 for Figure 5 Cross-sectional view in the AA direction;

[0025] Figure 7 for Figure 5 Cross-sectional view in the middle BB direction;

[0026] Figure 8 for Figure 3 Enlarged schematic diagram of point C in the middle;

[0027] Figure 9 A top view of the outer shell of a floor spring with an adaptive leveling effect;

[0028] Figure 10 for Figure 9 Cross-sectional view in the DD direction.

[0029] In the figure: 1. floor spring body; 2. inner shell; 3. outer shell; 4. cover plate; 5. casting filler groove; 6. cover plate hole; 7. groove; 8. leveling bolt; 9. clamping plate; 10. rear side abutment block; 11. front side abutment block; 12. adjusting screw; 13. rear connecting rod; 14. front connecting rod; 15. rotating rod; 16. rear rotating gear; 17. rear bevel gear; 18. front bevel gear; 19. front rotating gear; 20. adjusting gear; 21. horizontal calibrator; 22. vertical horizontal calibrator; 23. clamping groove; 24. lifting hole; 25. movable plate; 26. movable plate abutment groove; 27. movable plate extension end; 28. outer shell inner wall extension groove; 29. ​​outer shell inner cavity; 30. outer shell inner cavity wall abutment groove. DETAILED DESCRIPTION

[0030] See also Figures 1 to 4 In an embodiment of the present invention, a floor spring with an adaptive leveling effect includes a floor spring body 1, an inner shell 2 is provided on the outside of the floor spring body 1, an outer shell 3 is provided on the outside of the inner shell 2, an outer shell cavity 29 is opened on the upper part of the outer shell 3, the inner shell 2 is placed inside the inner shell cavity 29, a cover plate hole 6 is opened on the upper surface of the outer shell 3, the cover plate 4 is fixed to the upper side of the outer shell 3 with screws, a leveling component is provided on the surface of the outer shell 3, a front connecting rod 14 is passed through the front interior of the inner shell 2, both ends of the front connecting rod 14 extend to the outside of the side wall of the inner shell 2, and both ends of the front connecting rod 14 are fixedly connected to the front side abutment blocks 11, and a rear connecting rod 13 is passed through the rear interior of the inner shell 2, and both ends of the rear connecting rod 13 also extend to the outside of the side wall of the inner shell 2. Extending to the outside of the side wall of the inner shell 2, both ends of the rear connecting rod 13 are fixed with a rear side abutment block 10, and the left side wall of the outer shell inner cavity 29 is provided with two outer shell inner cavity wall abutment grooves 30. A movable plate 25 is installed inside the outer shell inner cavity 29, and the side surface of the movable plate 25 close to the outer shell inner cavity wall abutment groove 30 is provided with two movable plate abutment grooves 26. The positions of the two movable plate abutment grooves 26 and the two outer shell inner cavity wall abutment grooves 30 correspond to each other. The rear side abutment block 10 and the front side abutment block 11 located on the left side of the inner shell 2 are respectively clamped into the inside of the two outer shell inner cavity wall abutment grooves 30, and the rear side abutment block 10 and the front side abutment block 11 located on the right side of the inner shell 2 are respectively clamped into the inside of the two movable plate abutment grooves 26.

[0031] Preferably, the front and rear ends of the movable plate 25 are fixed with movable plate extension ends 27, and the front and rear side walls of the shell inner cavity 29 are provided with shell inner wall extension grooves 28. The movable plate extension ends 27 are slidably connected to the inside of the shell inner wall extension grooves 28, which can control the movement of the movable plate 25, and under the action of the clamping plate 9, the rear side abutment block 10 and the front side abutment block 11 can be fixed, so that the inner shell 2 is fixed in the shell inner cavity 29.

[0032] Preferably, a clamping groove 23 is formed between the movable plate 25 and the right side wall of the inner cavity 29 of the shell, and the clamping plate 9 is clamped inside the clamping groove 23. A pulling hole 24 is provided on the front end surface of the clamping plate 9, and the lower end of the clamping plate 9 is arranged at an angle to facilitate the clamping plate 9 to be clamped into the inside of the clamping groove 23. The pulling hole 24 is provided, and when the floor spring body 1 is inspected and repaired, the clamping plate 9 can be removed by passing a metal wire or line through the pulling hole 24, and then the floor spring body 1 and the inner shell 2 can be removed from the inner cavity 29 of the shell.

[0033] Preferably, the rear connecting rod 13 and the front connecting rod 14 are of equal length, the rear side abutment block 10 and the front side abutment block 11 are of equal thickness, the left sides of the rear side abutment block 10 and the front side abutment block 11 located on the left side of the inner shell 2 are located in the same plane, and the rear connecting rod 13 and the front connecting rod 14 are controlled to be equal, so that when the inner shell 2 moves laterally, the front and rear sides can move synchronously.

[0034] Preferably, the maximum distance between the two rear side abutment blocks 10 is equal to the minimum distance between the inner surface of the abutment groove 30 of the inner cavity wall of the shell and the inner surface of the movable plate abutment groove 26, and the maximum width of the clamping groove 23 is equal to the thickness of the upper part of the clamping plate 9, which can completely fix the rear side abutment block 10 and the front side abutment block 11 to prevent the inner shell 2 from loosening.

[0035] Preferably, a rear bevel gear 17 and a front bevel gear 18 are respectively provided inside the inner shell 2, the rear bevel gear 17 is sleeved on the surface of the rear connecting rod 13, and the interior of the rear bevel gear 17 is threadedly connected to the surface of the rear connecting rod 13, the front bevel gear 18 is sleeved on the surface of the front connecting rod 14, and the interior of the front bevel gear 18 is threadedly connected to the surface of the front connecting rod 14, and a connecting rod 15 is installed inside the inner shell 2, the rear side end of the connecting rod 15 is fixedly connected to the rear connecting gear 16, the rear connecting gear 16 and the rear bevel gear 17 are meshed with each other, and the front side end of the connecting rod 15 is fixedly connected to the front connecting gear 19, and the front connecting gear 19 and the front bevel gear 18 are meshed with each other.

[0036] Preferably, an adjusting screw 12 is installed on the upper surface of the inner shell 2, and the lower end of the adjusting screw 12 extends into the interior of the inner shell 2. An adjusting gear 20 is fixed to the lower end of the inner shell 2, and the adjusting gear 20 and the front bevel gear 18 are engaged with each other. The front bevel gear 18 and the rear bevel gear 17 are accessories of the same specifications, and the rear connecting gear 16 and the front connecting gear 19 are accessories of the same specifications, which are used to control the inner shell 2 to move laterally so that the front and rear sides can move synchronously.

[0037] Preferably, the leveling assembly includes a transverse horizontal calibrator 21 and a longitudinal horizontal calibrator 22, which are respectively embedded in the upper surface of the inner shell 2. The transverse horizontal calibrator 21 and the longitudinal horizontal calibrator 22 are both bubble levels. Grooves 7 are provided at the four corners of the upper surface of the outer shell 3, and leveling bolts 8 are vertically installed inside the grooves 7 for adjusting the outer shell 3 to a horizontal state.

[0038] Preferably, a casting filling groove 5 is vertically opened on the side of the inner shell 2, and casting material is filled into the hole groove and the bottom of the outer shell 3 through the casting filling groove 5, so as to fix the outer shell 3.

[0039] The working principle of the present invention is as follows: when installing the floor spring, it is necessary to first open a hole groove for placing the outer shell 3 at the bottom of the door frame, and then place the outer shell 3 inside the hole groove, and adjust the leveling bolt 8 according to the offset direction of the horizontal level calibrator 21 and the vertical level calibrator 22, so that the outer shell 3 can still be kept in a horizontal state inside the hole groove, and fill the hole groove and the bottom of the outer shell 3 with casting material by pouring the filling groove 5, so as to fix the outer shell 3, and then install the inner shell 2 to the inside of the floor spring body 1, and place the floor spring body 1 into the inner cavity 29 of the outer shell, so that the rear side abutment block 10 and the front side abutment block 11 respectively abut against the inside of the movable plate abutment groove 26 and the inner cavity wall abutment groove 30 of the outer shell, and then clamp the clamping plate 9 into the inside of the clamping groove 23. When the clamping plate 9 is fully clamped into the inside of the clamping groove 23, the rear The outer surfaces of the side abutment blocks 10 and the front side abutment blocks 11 completely abut against the inner walls of the movable plate abutment grooves 26 and the inner walls of the outer shell inner cavity abutment grooves 30, completing the fixation of the inner shell 2. Then, as required, the position of the floor spring body 1 is adjusted to correspond to the top card axis inside the door frame, and the adjusting screw 12 is screwed with a screwdriver to rotate the front bevel gear 18, and the front bevel gear 18 drives the front connecting gear 19 to rotate, and the front connecting gear 19 drives the rear bevel gear 17 to rotate. Since the rear bevel gear 17 is threadedly connected to the surface of the rear connecting rod 13, and the front bevel gear 18 is threadedly connected to the surface of the front connecting rod 14, after the rear connecting rod 13 and the front connecting rod 14 are fixed, the inner shell 2 can move laterally, thereby adjusting the axial position of the floor spring body 1 and the position of the top card axis to correspond to each other, which is convenient for installing the door leaf.

[0040] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A floor spring with an adaptive leveling effect, comprising a floor spring body (1), characterized in that: The floor spring body (1) is provided with an inner shell (2) on the outside, an outer shell (3) is provided on the outside of the inner shell (2), an outer shell cavity (29) is provided on the upper part of the outer shell (3), the inner shell (2) is placed inside the inner shell cavity (29), a cover plate hole (6) is provided on the upper surface of the outer shell (3), the cover plate (4) is fixed to the upper side of the outer shell (3) with screws, a leveling component is provided on the surface of the outer shell (3), a front connecting rod (14) is passed through the inside of the front side of the inner shell (2), both ends of the front connecting rod (14) extend to the outside of the side wall of the inner shell (2), and both ends of the front connecting rod (14) are fixed to the outside of the side wall of the inner shell (2). The front side abutment block (11) is connected, a rear connecting rod (13) is passed through the rear side of the inner shell (2), both ends of the rear connecting rod (13) also extend to the outside of the side wall of the inner shell (2), and both ends of the rear connecting rod (13) are fixedly connected to the rear side abutment block (10), the left side wall of the outer shell cavity (29) is provided with two outer shell cavity wall abutment grooves (30), a movable plate (25) is installed inside the outer shell cavity (29), and the side surface of the movable plate (25) close to the outer shell cavity wall abutment groove (30) is provided with two movable plate abutment grooves (26), the two movable plate abutment grooves (26) and the two The positions of the inner cavity wall abutment grooves (30) of the shell correspond to each other, the rear side abutment block (10) and the front side abutment block (11) located on the left side of the inner shell (2) are respectively clamped in the inside of the two inner cavity wall abutment grooves (30) of the shell, and the rear side abutment block (10) and the front side abutment block (11) located on the right side of the inner shell (2) are respectively clamped in the inside of the two movable plate abutment grooves (26), and the interior of the inner shell (2) is provided with a rear bevel gear (17) and a front bevel gear (18), the rear bevel gear (17) is sleeved on the surface of the rear connecting rod (13), and the rear bevel gear (17) is The interior is threadedly connected to the surface of the rear connecting rod (13); the front bevel gear (18) is sleeved on the surface of the front connecting rod (14); the interior of the front bevel gear (18) is threadedly connected to the surface of the front connecting rod (14); a connecting rod (15) is installed inside the inner shell (2); the rear end of the connecting rod (15) is fixedly connected to the rear connecting gear (16); the rear connecting gear (16) and the rear bevel gear (17) are meshed with each other; the front end of the connecting rod (15) is fixedly connected to the front connecting gear (19); the front connecting gear (19) and the front bevel gear (18) are meshed with each other.

2. The floor spring with adaptive horizontal effect according to claim 1, characterized in that: The front and rear ends of the movable plate (25) are fixedly connected with movable plate extension ends (27), the front and rear side walls of the shell inner cavity (29) are provided with shell inner wall extension grooves (28), and the movable plate extension ends (27) are slidably connected to the inside of the shell inner wall extension grooves (28).

3. The floor spring with adaptive horizontal effect according to claim 2, characterized in that: A clamping groove (23) is formed between the movable plate (25) and the right side wall of the inner cavity (29) of the shell, and a clamping plate (9) is clamped inside the clamping groove (23). A lifting hole (24) is provided on the front end surface of the clamping plate (9), and the lower end of the clamping plate (9) is arranged in an inclined surface.

4. The floor spring with adaptive horizontal effect according to claim 3, characterized in that: The rear connecting rod (13) and the front connecting rod (14) are of equal length, the rear side abutment block (10) and the front side abutment block (11) are of equal thickness, and the left sides of the rear side abutment block (10) and the front side abutment block (11) located on the left side of the inner shell (2) are located in the same plane.

5. The floor spring with adaptive horizontal effect according to claim 4, characterized in that: The maximum distance between the two rear side abutment blocks (10) is equal to the minimum distance between the inner surface of the housing inner cavity wall abutment groove (30) and the inner surface of the movable plate abutment groove (26), and the maximum width of the clamping groove (23) is equal to the thickness of the upper part of the clamping plate (9).

6. The floor spring with adaptive horizontal effect according to claim 2, characterized in that: An adjusting screw (12) is mounted on the upper surface of the inner shell (2), the lower end of the adjusting screw (12) extends into the interior of the inner shell (2), and an adjusting gear (20) is fixed to the lower end of the inner shell (2), and the adjusting gear (20) and the front bevel gear (18) are meshed with each other.

7. The floor spring with adaptive horizontal effect according to claim 2, characterized in that: The front bevel gear (18) and the rear bevel gear (17) are accessories of the same specification, and the rear continuously rotating gear (16) and the front continuously rotating gear (19) are accessories of the same specification.

8. The floor spring with adaptive horizontal effect according to claim 1, characterized in that: The leveling assembly comprises a transverse level calibrator (21) and a longitudinal level calibrator (22), the transverse level calibrator (21) and the longitudinal level calibrator (22) being respectively embedded in the upper surface of the inner shell (2), the transverse level calibrator (21) and the longitudinal level calibrator (22) being both bubble levels, and grooves (7) are provided at the four corners of the upper surface of the outer shell (3), and leveling bolts (8) are vertically installed inside the grooves (7).

9. The floor spring with adaptive horizontal effect according to claim 1, characterized in that: A pouring filler groove (5) is vertically opened on the side of the inner shell (2).

Citation Information

Patent Citations

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    CN111852229A

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    CN216714169U