A hydraulic floor spring and its assembly process

Abstract

The present invention discloses a hydraulic floor spring and its assembly process, which solves the technical problems of small controllable door closing angle and high failure rate when used in cold areas. The device includes a main machine, in which a main oil chamber capable of containing buffer oil is provided; an oil storage part, at least one of which is provided, and the oil storage part is connected to the main machine; an oil control assembly is provided on the oil storage part; wherein the oil storage part is connected to the main oil chamber, and the oil control assembly is elastic and is provided in the oil storage part in a state of elastic compression deformation; when the buffer oil in the main oil chamber undergoes thermal expansion, part of the buffer oil in the main oil chamber enters the oil storage part, and the oil control assembly continues to undergo elastic compression deformation; when the buffer oil in the main oil chamber undergoes cold contraction, the oil control assembly undergoes elastic elongation deformation, and presses part of the buffer oil in the auxiliary oil storage part into the main oil chamber. The present invention can achieve a larger controllable door closing angle, reduce the high failure rate, extend the service life, improve the stability of use, and improve the installation efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of floor springs, and in particular relates to a hydraulic floor spring and an assembly process thereof. Background Art

[0002] As an automatic door closer, the hydraulic floor spring incorporates components such as a camshaft, connecting plate, roller, pull rod, compression spring, main piston, and piston pin. A check valve is located within the main piston, and an oil circuit is located on one or both sides of the main piston hole, adjacent to the main piston. A throttle valve is also located within this circuit. The hydraulic floor spring's main unit, through its axis cover, right end cap, and sealing ball plug, forms a sealed chamber (V1). This chamber is filled with hydraulic oil, which acts as a buffering medium (buffer oil).

[0003] The main piston divides the sealed chamber V1 into two sections, V1a and V1b. When the door is closed, there's no pressure on either side. When the door is opened, the main piston moves leftward, opening the internal check valve and connecting the sealed chambers V1a and V1b. Pressure is eliminated on both sides. When the door is closed, the main piston moves rightward, closing the internal check valve. The buffer oil on the right side of the main piston can only flow back to the left side of the main piston via the throttle valve through the side oil passage. The throttle valve throttles the buffer oil, creating resistance. This builds up pressure on the right side of the main piston, hindering its movement. The throttle valve can be used to adjust the pressure: to increase pressure, close the throttle valve; to decrease pressure, open the throttle valve. Adjusting the throttle valve adjusts the speed of the main piston, and thus the door speed.

[0004] However, thermal expansion and contraction are inherent properties of matter, and the buffer oil used in hydraulic floor springs is no exception. When the ambient temperature is lower than the production and assembly refueling temperature, the volume of the oil will shrink, and the hydraulic floor spring is prone to a similar situation where the buffer oil is "not full", causing the hydraulic floor spring to stall (the effective controllable closing angle is reduced). When the temperature rises in the spring, the volume of the buffer oil gradually returns to its original volume, and the "false oil shortage" phenomenon caused by the oil shrinkage in the cold winter will naturally disappear, and the hydraulic floor spring will return to its normal speed regulation state. Moreover, when the ambient temperature is higher than the production and assembly refueling temperature, the volume of the buffer oil expands further, inevitably causing a large pressure increase, increasing the risk of oil leakage and cylinder explosion.

[0005] It can be seen from this that the hydraulic floor springs in the related art have the following problems: when the ambient temperature drops below the refueling temperature, the controllable door closing angle becomes smaller, the failure rate is high, the service life is short, the use stability is poor, and the installation efficiency is low. Summary of the Invention

[0006] In order to solve all or part of the above problems, the purpose of the present invention is to provide a hydraulic floor spring and its assembly process, which can not only adjust the pressure of the main oil chamber, but also ensure that the main oil chamber is always filled with buffer oil, so that the hydraulic floor spring has a larger controllable door closing angle, while also reducing the failure rate, extending the service life, improving the stability of use, and improving the installation efficiency.

[0007] In a first aspect, the present invention provides a hydraulic floor spring, comprising:

[0008] A main engine, wherein the main engine is provided with a main oil chamber capable of containing buffer oil;

[0009] At least one oil storage unit is provided, and the oil storage unit is connected to the main engine;

[0010] An oil control component is provided on the oil storage portion;

[0011] The oil storage portion is in communication with the main oil chamber, and the oil control component is elastic and is disposed in the oil storage portion in a state of elastic compression deformation;

[0012] When the buffer oil in the main oil chamber expands due to heat, part of the buffer oil in the main oil chamber enters the oil storage portion, causing the oil control component to continue to elastically compress and deform. When the buffer oil in the main oil chamber shrinks due to cold, the oil control component elastically stretches and deforms, and presses part of the buffer oil in the auxiliary oil storage portion into the main oil chamber.

[0013] Optionally, the oil storage portion includes at least one auxiliary oil chamber, and the auxiliary oil chamber is opened inside the main engine, each of the auxiliary oil chambers is connected to the main oil chamber through an oil channel, and an oil control component is provided in each of the auxiliary oil chambers.

[0014] Optionally, the oil storage unit includes:

[0015] An oil storage member is connected to the main engine, the oil storage member is a cylindrical structure with one side open, and the internal cavity of the oil storage member forms a secondary oil chamber;

[0016] an end cover connected to the oil storage member, and the end cover blocks the opening of the oil storage member;

[0017] a connecting hole, provided on the end cover, and communicating with the auxiliary oil chamber;

[0018] A stop valve is provided on the end cover;

[0019] Among them, the oil control component is arranged in the auxiliary oil chamber, and an oil channel is opened on the main engine. The oil channel connects the main oil chamber with the connecting hole, and the shut-off valve is used to control the opening and closing of the oil circuit between the connecting hole and the oil channel.

[0020] Optionally, the oil control component includes:

[0021] An oil control piston is slidably connected to the oil storage portion;

[0022] an oil control spring, disposed in the oil storage portion;

[0023] Wherein, both ends of the oil control spring are connected to the oil control piston and the oil storage member respectively, and the sliding direction of the oil control piston is the same as the elastic deformation direction of the oil control spring.

[0024] Optionally, the oil control component further includes:

[0025] an assembly hole, connecting the oil storage portion with the external environment and allowing external tooling to pass through the assembly hole;

[0026] A threaded blind hole is provided on the oil control piston, and the threaded blind hole is used for threaded connection of external tooling;

[0027] A plug is used to block the assembly hole.

[0028] Optionally, the oil control component further includes:

[0029] At least one sealing ring is provided, and the sealing ring is sleeved on the oil control piston;

[0030] The sealing ring can achieve sealing between the oil control piston and the oil storage portion.

[0031] Optionally, the oil control assembly further includes a filter disposed in the oil storage portion, and the filter is capable of filtering the buffer oil from the main oil chamber entering the oil storage portion, or the buffer oil from the oil storage portion entering the main oil chamber.

[0032] In a second aspect, the present invention provides an assembly process for a hydraulic floor spring, comprising the following steps:

[0033] S1, assembling the oil control component;

[0034] S2, connecting the positioning fixture to the oil control component, and placing the oil control component in a state of elastic compression deformation;

[0035] S3, placing the oil control assembly into the oil storage portion;

[0036] S4, filling the main engine with buffer oil, and allowing the buffer oil to enter the main oil chamber and the oil storage portion;

[0037] S5, disassembling the positioning tool.

[0038] Optionally, the positioning tooling includes a positioning rod and a limiting piece, the positioning rod can pass through the assembly hole and be threadedly engaged with the threaded blind hole, the limiting piece is used to limit the positioning rod, and the limiting direction is the axial direction of the positioning rod, and ensures that the oil control spring is in a state of elastic compression deformation.

[0039] Optionally, the limiting member includes a limiting card plate and at least one limiting surface, the limiting surface is arranged on the positioning rod, a limiting card slot is provided on the limiting card plate, and the positioning rod can enter the limiting card slot, one side surface of the limiting card plate abuts against the oil control component or the oil storage part, and the other side surface abuts against the limiting surface, thereby achieving the position limitation of the positioning rod.

[0040] As can be seen from the above technical solution, the hydraulic floor spring and its assembly process provided by the present invention have the following advantages:

[0041] By providing a secondary oil chamber with an oil control assembly, this device ensures that the main oil chamber is always filled with buffer oil, minimizing the "underfill" and "false oil shortage" phenomena, thereby improving the stability of the hydraulic floor spring. This design also reduces the failure rate, extends service life, and improves installation efficiency.

[0042] Other features and advantages of the present invention will be set forth in the description that follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0044] Figure 1 A partial cross-sectional view of the hydraulic floor spring in Example 1 of the present invention;

[0045] Figure 2 1 is a top view of the hydraulic floor spring in Example 1 of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the host in Example 1 of the present invention;

[0047] Figure 4 A cross-sectional view of the host in Example 1 of the present invention;

[0048] Figure 5 2 is a cross-sectional view of the plug in Example 1 of the present invention;

[0049] Figure 6 This is a cross-sectional view of the oil control piston in Example 1 of the present invention;

[0050] Figure 7 This is a front view of the tail fixing screw in Example 1 of the present invention;

[0051] Figure 8 2 is a cross-sectional view of the cement box and the cover plate in Example 1 of the present invention;

[0052] Figure 9 This is a schematic structural diagram of the buffer oil in the main oil chamber during thermal expansion in Example 1 of the present invention;

[0053] Figure 10 This is a schematic structural diagram of the buffer oil in the main oil chamber when it shrinks in Example 1 of the present invention;

[0054] Figure 11 This is a schematic diagram of the structure of the host in Example 2 of the present invention;

[0055] Figure 12 A partial cross-sectional view of the host in Example 2 of the present invention;

[0056] Figure 13 A partial cross-sectional view of the host in Example 2 of the present invention;

[0057] Figure 14 This is a schematic diagram of the structure of the host in Example 3 of the present invention;

[0058] Figure 15 This is a cross-sectional view of the host in Example 3 of the present invention;

[0059] Figure 16 2 is a cross-sectional view of the oil storage portion in Example 3 of the present invention;

[0060] Figure 17 A partial cross-sectional view of the main engine and the oil storage component in Example 3 of the present invention;

[0061] Figure 18 is a cross-sectional view of the end cover in Example 3 of the present invention;

[0062] Figure 19 This is a front view of the stop valve in Example 3 of the present invention;

[0063] Figure 20 This is a front view of the positioning rod in Example 4 of the present invention;

[0064] Figure 21 This is a front view of the limit clamping plate in Example 4 of the present invention;

[0065] Figure 22 This is a schematic diagram of the structure after the positioning tool is connected to the oil control spring and other components in Example 4 of the present invention;

[0066] Figure 23 This is a schematic diagram of the structure of the oil control spring and other components after installation in Example 4 of the present invention;

[0067] Figure 24 This is a front view of the positioning rod in Example 5 of the present invention;

[0068] Figure 25 1 is a side view of a positioning rod in Example 5 of the present invention;

[0069] Figure 26 This is a front view of the limit clamping plate in Example 5 of the present invention;

[0070] Figure 27 This is a schematic structural diagram of the positioning tool in use in Example 5 of the present invention.

[0071] Description of reference numerals:

[0072] 1. Cement box; 2. Cover plate; 3. Main engine; 4. Main oil chamber; 5. Oil reservoir; 51. Auxiliary oil chamber; 52. Oil reservoir; 53. End cover; 54. Stop valve; 55. Sealing ring; 56. End face seal; 6. Oil control assembly; 61. Oil control piston; 62. Oil control spring; 63. Sealing ring; 64. Filter; 65. Plug; 66. Plug; 7. Oil channel; 8. Threaded mounting hole; 9. Assembly hole; 10. Threaded blind hole; 11. Cover screw; 12. Head fixing bolt; 13. Tail fixing screw; 131. Heightened part; 132. Step part; 133. Threaded part; 134. Slotted groove; 14. Mounting platform Step; 15. Screw mounting hole; 16. Shock-absorbing pad; 17. Shock-absorbing mounting hole; 18. Round hole; 19. Connecting hole; 20. Matching hole; 21. Shaft neck; 22. Matching round hole; 23. Step surface; 24. Screw hole; 26. Round through hole; 27. Sealing cone surface; 28. Annular groove; 30. Threaded connection part; 31. Sealing groove; 32. Reduced diameter; 33. Conical surface; 34. Valve line; 35. One-line horizontal groove; 36. Positioning tool; 361. Positioning rod; 362. Limiting piece; 37. Threaded matching part; 38. Long rod part; 39. Hand-held part; 40. Limiting clamp; 41. Limiting surface; 42. Limiting slot; 43. Slotting. DETAILED DESCRIPTION

[0073] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other in any manner.

[0074] Example 1

[0075] like Figures 1-10The embodiment 1 of the present invention is shown, which discloses a hydraulic floor spring, including a cement box 1, a cover plate 2 and a main unit 3. The cement box 1 is a boxed structure with an upper opening. The main unit 3 is arranged in the cement box 1. The cover plate 2 is detachably connected to the main unit 3, and the cover plate 2 seals the upper opening of the cement box 1.

[0076] In Example 1, Figure 3 、 Figure 4 As shown, a main oil chamber 4 is provided within the main engine 3 to store buffer oil. At least one oil reservoir 5 is connected to the main engine 3 and communicates with the main oil chamber 4. Each oil reservoir 5 is provided with an elastic oil control assembly 6. The oil control assembly 6 is disposed within the oil reservoir 5 in an elastically compressed state.

[0077] In Example 1, Figure 3 、 Figure 4 As shown, the oil reservoir 5 includes at least one auxiliary oil chamber 51, which is directly located within the main engine 3. Each auxiliary oil chamber 51 is connected to the main oil chamber 4 via an oil channel 7, and an oil control assembly 6 is disposed within each auxiliary oil chamber 51.

[0078] When the buffer oil in the main oil chamber 4 expands due to heat, some of the buffer oil in the main oil chamber 4 flows into the oil reservoir 5, causing the oil control assembly 6 to continue to elastically compress and deform, thereby regulating the pressure in the main oil chamber 4. When the buffer oil in the main oil chamber 4 contracts due to cold, the oil control assembly 6 elastically stretches and deforms, pressing some of the buffer oil in the auxiliary oil reservoir 5 into the main oil chamber 4, ensuring that the main oil chamber 4 is always filled with buffer oil.

[0079] In Example 1, only one oil storage portion 5 and one auxiliary oil chamber 51 are provided. Of course, in other embodiments, the number of oil storage portions 5 and auxiliary oil chambers 51 can be selected according to the actual size or actual application of the hydraulic floor spring, and no further examples are given here.

[0080] In Example 1, Figure 3 、 Figure 4 As shown, the oil control assembly 6 includes an oil control piston 61 and an oil control spring 62. The oil control piston 61 is slidably connected to the auxiliary oil chamber 51 and slides along the axis of the auxiliary oil chamber 51. Furthermore, at least one elastic sealing ring 63 is fixedly mounted on the oil control piston 61. The sealing ring 63 is made of an elastic material such as rubber or latex to achieve a seal between the oil control piston 61 and the auxiliary oil chamber 51.

[0081] In Example 1, Figure 3 、 Figure 4As shown, a filter 64 is provided in the auxiliary oil chamber 51. When the buffer oil in the main oil chamber 4 enters the auxiliary oil chamber 51, or when the buffer oil in the auxiliary oil chamber 51 enters the main oil chamber 4, the filter 64 can filter the buffer oil.

[0082] In Example 1, Figure 3 、 Figure 4 As shown, the main engine 3 is provided with a threaded mounting hole 8, which communicates with the auxiliary oil chamber 51 and is coaxially arranged with the auxiliary oil chamber 51. Furthermore, a filter 64, an oil control piston 61, and an oil control spring 62 can pass through the threaded mounting hole 8. Furthermore, a plug 65 is threadedly connected to the inner thread of the threaded mounting hole 8 to seal the threaded mounting hole 8.

[0083] In Example 1, Figure 3 、 Figure 4 As shown, one end of the oil control spring 62 is fixedly connected or abutted with the oil control piston 61 , and the other end is fixedly connected or abutted with the plug 65 , and the sliding direction of the oil control piston 61 is the same as the elastic deformation direction of the oil control spring 62 .

[0084] In Example 1, Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, the plug 65 has an assembly hole 9, one end of which connects to the auxiliary oil chamber 51 and the other to the external environment. External tooling can pass through the assembly hole 9. A plug 66 is detachably connected to the assembly hole 9. This plug 66 can be threadedly connected to the assembly hole 9, or it can be made of an elastic material and directly block the assembly hole 9. Furthermore, a threaded blind hole 10 is defined on the side of the oil control piston 61 near the oil control spring 62. This blind hole 10 allows external tooling to pass through the assembly hole 9 and be threadedly connected.

[0085] In Example 1, Figure 1 As shown, the cover plate 2 and the main unit 3 are detachably connected by multiple bolts or screws. In this embodiment, a group of cover plate screws 11 are used to connect the cover plate 2 and the main unit 3, and a group of head fixing bolts 12 and a group of tail fixing screws 13 are used to connect the main unit 3 and the cement box 1. In other embodiments, other detachable connection methods such as magnetic attraction and snap connection can also be used.

[0086] In Example 1, Figure 1 、 Figure 3 As shown, the surface of the host 3 has a mounting step 14, and a screw mounting hole 15 for threaded engagement with the cover screw 11 is opened on the mounting step 14, and the bottom hole of the screw mounting hole 15 is a through hole.

[0087] In Example 1, Figure 1 、 Figure 7 As shown, the tail fixing screw 13 includes a raised portion 131, a step portion 132 and a threaded portion 133 connected in sequence from top to bottom. The raised portion 131 is in the shape of a hexagonal prism, and a slot 134 is provided at the top of the raised portion 131. The step portion 132 is shorter than the raised portion 131. The tail fixing screw 13 is determined in such a way that the tail fixing screw 13 can be easily pre-installed on the rear of the cement box 1 by hand. After the tail fixing screw 13 of this embodiment is tightened, the upper end surface of the raised portion 131 is 3 mm away from the upper edge of the cement box 1.

[0088] In Example 1, Figure 1 、 Figure 8 As shown, an elastic shock-absorbing pad 16 is provided between the cover 2 and the main unit 3. The shock-absorbing pad 16 is made of elastic material such as rubber or latex. A shock-absorbing mounting hole 17 is provided on the upper surface of the main unit 3. The shock-absorbing pad 16 is configured as follows: when the shock-absorbing pad 16 is inserted into the shock-absorbing mounting hole 17, the lower end of the head of the shock-absorbing pad 16 is in close contact with the upper surface of the main unit 3, and the top of the shock-absorbing pad 16 is in contact with the cover 2 and has an appropriate amount of compression.

[0089] In Example 1, Figure 9 As shown, when the ambient temperature is higher than the refueling temperature of the main engine 3, the volume of the buffer oil in the main oil chamber 4 expands, and the buffer oil in the main oil chamber 4 enters the auxiliary oil chamber 51. The oil control piston 61 moves to the right under the action of the expanding oil pressure, further compressing the oil control spring 62 in the auxiliary oil chamber 51, thereby limiting the increase in the internal pressure of the floor spring.

[0090] In Example 1, Figure 10 As shown, when the ambient temperature is lower than the refueling temperature of the main engine 3, the buffer oil in the main oil chamber 4 shrinks due to cold contraction, causing the oil control spring 62 to extend outward, pushing the oil control piston 61 leftward, forcing the buffer oil in the auxiliary oil chamber 51 into the main oil chamber 4 for replenishment. This ensures that the main oil chamber 4 has enough buffer oil to meet the normal operation of the floor spring. When the ambient temperature is comparable to the refueling temperature, the position of the oil control piston 61 remains virtually unchanged.

[0091] This design not only regulates the pressure in the main oil chamber 4 but also ensures that it is always filled with buffer oil, thereby minimizing the occurrence of "underfilled" buffer oil and "false oil shortage" phenomena, thereby improving the operational stability of the hydraulic floor spring. Furthermore, this design reduces the risk of cylinder explosion and other problems, thereby reducing the failure rate and extending the service life of the hydraulic floor spring.

[0092] Example 2

[0093] like Figure 11 、 Figure 12 、 Figure 13The embodiment 2 of the present invention is shown. In this embodiment, a hydraulic floor spring is disclosed. The difference between this embodiment and the embodiment 1 is that: there are two auxiliary oil chambers 51, and two circular holes 18 are opened on the surface of the main machine 3. The two circular holes 18 are located on both sides of the piston hole of the main machine 3, and the inner chambers of the two circular holes 18 form auxiliary oil chambers 51. At the same time, the two auxiliary oil chambers 51 are also connected to the main oil chamber 4 through the oil channel 7.

[0094] In Example 2, Figure 1 、 Figure 2 As shown, each auxiliary oil chamber 51 is also provided with a filter 64, an oil control piston 61, an oil control spring 62 and a plug 65. A sealing ring 63 is fixedly sleeved on the oil control piston 61, an assembly hole 9 is provided on the plug 65, and a plug 66 is detachably connected to the assembly hole 9. A threaded blind hole 10 is provided on the side of the oil control piston 61 close to the oil control spring 62. This structure is exactly the same as that in Example 1 and will not be repeated here.

[0095] In the hydraulic floor spring of Example 2, when the ambient temperature is higher than the refueling temperature of the main engine 3, the buffer oil in the main oil chamber 4 expands and enters the two auxiliary oil chambers 51. When the ambient temperature is lower than the refueling temperature of the main engine 3, the buffer oil in the main oil chamber 4 decreases in volume due to cold contraction, and the buffer oil in the two auxiliary oil chambers 51 is simultaneously pressed into the main oil chamber 4 for replenishment. The principle is the same as in Example 1.

[0096] Example 3

[0097] like Figures 14-19 The third embodiment of the present invention discloses a hydraulic floor spring. This embodiment differs from the first embodiment in that the oil reservoir 5 includes an oil reservoir 52 detachably connected to the main engine 3. The oil reservoir 52 is a cylindrical structure with one side open, and the internal chamber of the oil reservoir 52 forms a secondary oil chamber 51. Furthermore, an end cap 53 is detachably connected to the oil reservoir 52 to seal the opening of the oil reservoir 52.

[0098] In Example 3, Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 As shown, the end cover 53 is provided with a connecting hole 19, which communicates with the auxiliary oil chamber 51. A mating hole 20 is also provided on the end cover 53, which communicates with the connecting hole 19. A shutoff valve 54 is located within the mating hole 20. The main engine 3 is provided with an oil passage 7, which connects the main oil chamber 4 with the connecting hole 19. The shutoff valve 54 is used to control the oil flow between the connecting hole 19 and the oil passage 7. The shutoff valve 54 is also provided with a sealing ring 55 and an end face seal 56.

[0099] In Example 3, Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 As shown, the end cap 53 is integrally connected to the journal 21, and the main body 3 is provided with a matching circular hole 22, and the journal 21 is interference fit with the matching circular hole 22. At the same time, the left end of the end cap 53 is provided with a step surface 23 parallel to the axis of the journal 21.

[0100] In Example 3, Figure 18 、 Figure 19 As shown, a screw hole 24 is provided at the left end of the end cap 53. The axis of screw hole 24 is perpendicular to the stepped surface 23. The upper portion of screw hole 24 communicates with the mating hole 20. A circular through hole 26 is provided at the lower portion of screw hole 24. A 120° sealing conical surface 27 is provided between the bottom hole of screw hole 24 and the circular through hole 26. Furthermore, an annular groove 28 is provided on the stepped surface 23, coaxially arranged with the circular through hole 26.

[0101] In Example 3, Figure 18 、 Figure 19 As shown, the stop valve 54 is provided with a threaded connection portion 30, a sealing groove 31, a reduced diameter 32 and a 90° tapered surface 33. The tapered surface 33 and the end surface form a valve line 34, and a straight horizontal groove 35 is opened on the upper part of the stop valve 54.

[0102] In Example 3, Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 As shown, the oil control plug 66 and oil control spring 62 are respectively disposed within the auxiliary oil chamber 51 and can be inserted into and removed from the open end of the oil reservoir 52. An assembly hole 9 is provided on the side of the oil reservoir 52 facing away from the end thereof. A plug 66 is detachably connected to the assembly hole 9. The area between the assembly hole 9 of the oil reservoir 52 and the auxiliary oil chamber 51 represents the plug 65 structure of Example 1, where the plug 66 is connected.

[0103] In the hydraulic floor spring of Example 3, when the ambient temperature is higher than the refueling temperature of the main engine 3, the buffer oil in the main oil chamber 4 expands and enters the auxiliary oil chamber 51. When the ambient temperature is lower than the refueling temperature of the main engine 3, the buffer oil in the main oil chamber 4 shrinks due to cold contraction, and the buffer oil in the auxiliary oil chamber 51 is pressed into the main oil chamber 4 for replenishment. This principle is the same as in Example 1. This embodiment allows components such as the auxiliary oil chamber 51 to be located outside the main engine 3, making the spatial layout of the main engine 3 more compact and reasonable. The oil reservoir 5 can also be arranged according to actual conditions, improving its adaptability.

[0104] Of course, as in the independent oil storage part 5 in Example 3, the oil storage part 5 can also be placed in the space formed by the hydraulic floor spring main unit 3, the cement box 1 and the cover plate 2, and the auxiliary oil chamber 51 is then connected to the main unit 3 through a hydraulic hose and a hydraulic pipe joint, which can also meet the function of the external oil storage part 5, and the principle is the same as that in Example 3. It mainly reflects that the external oil storage part 5 does not need to be installed on the main unit 3, and the user can choose according to actual conditions.

[0105] Example 4

[0106] like Figure 20-23 The fourth embodiment of the present invention is shown. This embodiment discloses an assembly process of a hydraulic floor spring, including the following steps:

[0107] S1, assembling the oil control component 6;

[0108] S2, connecting the positioning fixture 36 to the oil control component 6, and placing the oil control component 6 in a state of elastic compression deformation;

[0109] S3, placing the oil control assembly 6 into the oil storage portion 5;

[0110] S4, filling the main engine 3 with buffer oil, and allowing the buffer oil to enter the main oil chamber 4 and the oil storage part 5;

[0111] S5, disassembling the positioning fixture 36.

[0112] In Example 4, Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 As shown, the positioning tool 36 includes a positioning rod 361 and a limit member 362. The positioning rod 361 includes a threaded fitting portion 37, a long rod portion 38 and a hand-held portion 39 connected in sequence. The threaded fitting portion 37 and the long rod portion 38 can pass through the assembly hole 9, and the threaded fitting portion 37 can be threadedly fitted with the threaded blind hole 10, and the two are loosely fitted, so that the threaded fitting portion 37 can be quickly unscrewed from the threaded blind hole 10.

[0113] In Example 4, Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 As shown, the diameter of the hand-held portion 39 is larger than the diameter of the long rod portion 38 , and the limiting member 362 is used to limit the positioning rod 361 , and the limiting direction is the axial direction of the positioning rod 361 to ensure that the oil control spring 62 is in an elastically compressed deformation state.

[0114] In Example 4, Figure 20 、 Figure 21 、 Figure 22 、 Figure 23As shown, the position-limiting member 362 includes a position-limiting plate 40 and at least one position-limiting surface 41. The position-limiting plate 40 defines a position-limiting slot 42, and the positioning rod 361 is loosely fitted into the position-limiting slot 42. The position-limiting surface 41 is the end surface of the handle 39 near the long rod 38. When one surface of the position-limiting plate 40 abuts the oil control assembly 6 or the oil reservoir 5, and the other surface abuts the position-limiting surface 41, the position of the positioning rod 361 is limited.

[0115] When the hydraulic floor spring needs to be assembled, first put the filter 64 into the auxiliary oil chamber 51, then remove the plug 66, and then pass the long rod 38 through the assembly hole 9, and make the threaded fitting part 37 form a threaded fit with the threaded blind hole 10, and pre-assemble it as shown below. Figure 22 Then, Figure 22 The pre-assembled components shown (including the oil control piston 61 and other components) are inserted into the auxiliary oil chamber 51, and the threaded mounting hole 8 is blocked by the plug 65. Subsequently, the hand-held portion 39 is gently pulled to move, and a gap is created between the end face of the hand-held portion 39 and the end face of the plug 65 for the limit card 40 to be inserted (that is, the distance between the end face of the hand-held portion 39 and the end face of the plug 65 is the thickness of the limit card 40). At the same time, the limit card 40 is installed on the long rod portion 38, and the long rod portion 38 is inserted into the limit card slot 42. At this time, one side surface of the limit card 40 abuts against the plug 65, and the other side surface abuts against the end face of the hand-held portion 39 (limiting surface 41), thereby realizing the position limitation of the positioning rod 361. At this time, the oil control spring 62 is in a compressed state.

[0116] When the main engine 3 is filled with buffer oil, the limit card plate 40 is removed. Since the buffer oil is almost incompressible, the position of the oil control piston 61 is almost stationary. The positioning rod 361 is in a loose state after the limit card plate 40 is removed, that is, the connection between the positioning rod 361 and the oil control piston 61 is relatively loose. Then, the positioning rod 361 can be easily unscrewed, and the oil control spring 62 pushes the oil control piston 61 slightly to the left, and the buffer oil is in a micro-pressure state.

[0117] This design allows for adjustment of the compression of the oil control spring 62 by replacing the positioning rod 361 with different lengths (i.e., the length of the long rod 38). During low ambient temperatures during the production season, the required oil replenishment volume is reduced. Using a longer positioning rod 361, the oil control piston 61 is positioned closer to the filter 64, allowing the auxiliary oil chamber 51 to have a larger expansion compensation volume for high-temperature applications. During high ambient temperatures during the production season, the required oil replenishment volume is increased due to the decrease in ambient temperature. Using a shorter positioning rod 361, the oil control piston 61 is positioned closer to the plug 65, allowing the auxiliary oil chamber 51 to have a larger replenishment volume for low-temperature applications flowing into the main oil chamber 4.

[0118] In Example 4, the effective length of the long rod portion 38 is designed to be six sizes, corresponding to refueling temperatures of 15, 20, 25, 30, 35, and 40 degrees Celsius. When the ambient temperature is below 15 degrees Celsius, the fuel tank of the fuel dispenser is preheated to 15 degrees Celsius. When the refueling ambient temperature changes, the positioning rod 361 adapted to the specific temperature range can be used.

[0119] Example 5

[0120] like Figure 24-27 The embodiment 5 of the present invention is shown, which discloses an assembly process of a hydraulic floor spring. The difference between this embodiment and the embodiment 4 is that the limiting member 362 includes a limiting card plate 40 and a limiting surface 41, and a limiting card slot 42 is provided on the limiting card plate 40, and a plurality of slots 43 are provided on the long rod portion 38. Each slot 43 is separated by a certain distance, corresponding to a different refueling temperature.

[0121] In Example 5, Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 As shown, the width of the slot 43 matches the thickness of the limiting card plate 40, the depth of the slot 43 matches the width of the limiting card plate 42, and the inner wall of the slot 43 can abut against the limiting card plate 40, that is, the inner wall of the slot 43 serves as the limiting surface 41. In Example 5, there are six slots 43, and they are engraved with the words 40, 35, 30, 25, 20, and 15, respectively, representing the refueling temperatures of 40, 35, 30, 25, 20, and 15 degrees Celsius, respectively.

[0122] During assembly of the hydraulic floor spring, after tightening the plug 65, the positioning rod 361 is stretched to a suitable position. For example, if the refueling temperature is 35 degrees Celsius, the positioning rod 361 is pulled to the position where the number 35 appears on the slot 43. Then, the limiting clamp 40 is engaged, thereby positioning the oil control piston 61 within the auxiliary oil chamber 51. After the main body 3 is filled with buffer oil, the limiting clamp 40 is removed to unload the elastic force of the oil control spring 62, and then the positioning rod 361 is unscrewed.

[0123] It should be noted that, unless otherwise specified, the technical or scientific terms used in the present invention should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0124] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A hydraulic floor spring, characterized in that: include: A main engine (3), wherein a main oil chamber (4) capable of containing buffer oil is provided in the main engine (3); At least one oil storage unit (5) is provided, and the oil storage unit (5) is connected to the main engine (3); An oil control component (6) is provided on the oil storage portion (5); The oil storage portion (5) is in communication with the main oil chamber (4), and the oil control component (6) is elastic and is disposed in the oil storage portion (5) in a state of elastic compression deformation. When the buffer oil in the main oil chamber (4) experiences thermal expansion, part of the buffer oil in the main oil chamber (4) enters the oil storage portion (5), causing the oil control component (6) to continue elastic compression deformation; when the buffer oil in the main oil chamber (4) experiences cold contraction, the oil control component (6) undergoes elastic elongation deformation, and presses part of the buffer oil in the oil storage portion (5) into the main oil chamber (4); The oil storage part (5) comprises: An oil storage member (52) is connected to the main engine (3), the oil storage member (52) is a cylindrical structure with one side open, and the internal chamber of the oil storage member (52) forms a secondary oil chamber (51); an end cover (53) connected to the oil storage member (52), and the end cover (53) blocks the opening of the oil storage member (52); A connecting hole (19) is provided on the end cover (53), and the connecting hole (19) is communicated with the auxiliary oil chamber (51); A stop valve (54) is provided on the end cover (53); The oil control component (6) is arranged in the auxiliary oil chamber (51), the main engine (3) is provided with an oil passage (7), the oil passage (7) connects the main oil chamber (4) with the connecting hole (19), and the shut-off valve (54) is used to control the opening and closing of the oil circuit between the connecting hole (19) and the oil passage (7); The oil control component (6) comprises: An oil control piston (61) is slidably connected to the oil storage portion (5); an oil control spring (62) disposed in the oil storage portion (5); The two ends of the oil control spring (62) are respectively connected to the oil control piston (61) and the oil storage member (52), and the sliding direction of the oil control piston (61) is the same as the elastic deformation direction of the oil control spring (62).

2. The hydraulic floor spring according to claim 1, characterized in that: The oil control component (6) further comprises: An assembly hole (9) connects the oil storage portion (5) with the external environment, and the assembly hole (9) is used for external tooling to pass through; A threaded blind hole (10) is provided on the oil control piston (61), and the threaded blind hole (10) is provided for threaded connection of an external tooling; A plug (66) is used to block the assembly hole (9).

3. The hydraulic floor spring according to claim 1, characterized in that: The oil control component (6) further comprises: At least one sealing ring (63) is provided, and the sealing ring (63) is sleeved on the oil control piston (61); The sealing ring (63) can achieve sealing between the oil control piston (61) and the oil storage portion (5).

4. The hydraulic floor spring according to claim 1, characterized in that: The oil control assembly (6) further comprises a filter (64) disposed in the oil storage portion (5), wherein the filter (64) is capable of filtering the buffer oil entering the oil storage portion (5) from the main oil chamber (4), or filtering the buffer oil entering the main oil chamber (4) from the oil storage portion (5).

5. An assembly process for a hydraulic floor spring according to any one of claims 2 to 4, characterized in that: The steps include: S1, assembling the oil control component (6); S2, connecting the positioning tool (36) to the oil control component (6), and placing the oil control component (6) in a state of elastic compression deformation; S3, placing the oil control assembly (6) into the oil storage portion (5); S4, filling the main engine (3) with buffer oil, and allowing the buffer oil to enter the main oil chamber (4) and the oil storage portion (5); S5, disassembling the positioning tool (36).

6. The assembly process according to claim 5, characterized in that: The positioning fixture (36) includes a positioning rod (361) and a limiting member (362). The positioning rod (361) can pass through the assembly hole (9) and be threadedly engaged with the threaded blind hole (10). The limiting member (362) is used to limit the positioning rod (361), and the limiting direction is the axial direction of the positioning rod (361), and ensures that the oil control spring (62) is in an elastically compressed deformation state.

7. The assembly process according to claim 6, characterized in that: The limiting member (362) includes a limiting card plate (40) and at least one limiting surface (41), wherein the limiting surface (41) is provided on the positioning rod (361), and a limiting card slot (42) is provided on the limiting card plate (40), and the positioning rod (361) can enter the limiting card slot (42). One side surface of the limiting card plate (40) abuts against the oil control component (6) or the oil storage part (5), and the other side surface abuts against the limiting surface (41), thereby realizing the position limitation of the positioning rod (361).

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