Cylinder cover of oil cylinder

Abstract

The utility model provides an oil cylinder cover which is installed on a cylinder body of a hydraulic cylinder, the hydraulic cylinder further comprises a piston located in the cylinder body, the oil cylinder cover comprises a cylinder cover body, a plurality of oil cavities are formed in the cylinder cover body, and the oil cavities communicate with one another; the first buffer plugs and the second buffer plugs are mounted in different oil cavities; the connecting rod is fixedly connected to the side, close to the piston, of the first buffering screen and penetrates through the cylinder cover body. The abutting plate is fixedly connected to the end, extending out of the cylinder cover body, of the connecting rod and is annular. The first compressed spring is installed in the oil cavity, and one end of the first compressed spring is fixedly connected to the side, away from the connecting rod, of the first buffer plug. According to the hydraulic cylinder, buffering and force releasing can be effectively conducted on the piston, collision damage between the cylinder cover and the piston is reduced, and the service life of the hydraulic cylinder is prolonged.

Description

Technical Field

[0001] This application relates to the field of hydraulic cylinder technology, and more particularly to a cylinder head for a hydraulic cylinder. Background Technology

[0002] The cylinder head is the upper cover of a hydraulic cylinder, also known as the cylinder head or cylinder top cover. It is located on top of the hydraulic cylinder and is connected to the cylinder body to form a complete hydraulic cylinder structure. The function of the cylinder head is to seal the top of the hydraulic cylinder and provide the function of connecting and supporting other components of the hydraulic cylinder. It is usually made of strong metal materials, such as cast iron, aluminum alloy or steel, to provide sufficient strength and durability.

[0003] A Chinese patent with publication number CN221942871U provides a hydraulic cylinder head, including a cylinder head body. The outer surface of the cylinder head body has threaded holes, and a heat-conducting plate is attached to the outer surface of the cylinder head body. The surface of the heat-conducting plate has perforations. This invention solves the problem that existing hydraulic cylinder heads typically lack active heat dissipation structures. When the hydraulic cylinder is used at high frequency, the cylinder head temperature rises, and high temperatures can cause the seals to age, harden, or deform, thereby reducing sealing performance and increasing the risk of leakage.

[0004] However, the above-mentioned patent still has some defects. If the position where the cylinder head contacts the piston is the end point of the hydraulic cylinder's stroke, and the position where the bottom of the cylinder contacts the piston is the start point of the hydraulic cylinder's stroke, when the hydraulic cylinder moves from the start point to the end point, the piston has a large kinetic energy under high-speed movement, which may cause mechanical collision with the cylinder head, resulting in impact, noise, or even damage to the cylinder head and piston. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a cylinder head that can effectively buffer and relieve the piston, reduce the collision damage between the cylinder head and the piston, and improve the service life of the hydraulic cylinder.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A cylinder head is mounted on the cylinder body of a hydraulic cylinder, the hydraulic cylinder further including a piston located inside the cylinder body, and the cylinder head including a cylinder head body;

[0008] Several oil chambers are formed inside the cylinder head body, and the several oil chambers are interconnected.

[0009] Several first buffer plugs and several second buffer plugs are installed in different oil chambers;

[0010] A connecting rod is fixed to the side of the first buffer screen near the piston, and the connecting rod passes through the cylinder head body;

[0011] An abutment plate is fixed to one end of the connecting rod that extends out of the cylinder head body, and the abutment plate is annular;

[0012] A first compression spring is installed in the oil chamber, and one end of the first compression spring is fixed to the side of the first buffer plug away from the connecting rod.

[0013] A second compression spring is installed inside the oil chamber, and one end of the second compression spring is fixed to the side of the second buffer plug near the piston.

[0014] The oil chamber located in the portion of the first and second buffer plugs away from the piston is filled with hydraulic oil.

[0015] In one embodiment, a plurality of the oil chambers are distributed in a circumferential array within the cylinder head body, and the positions of the first buffer plug and the second buffer plug are alternately arranged.

[0016] In one embodiment, the cylinder head body includes:

[0017] The base, wherein the oil cavity is formed within the base;

[0018] A cap is fixed to the base on the side away from the piston by a plurality of first screws.

[0019] An annular cavity is formed within the cover, and the oil cavities are interconnected through the annular cavity.

[0020] In one embodiment, one of the base and the cover has a mating flange, and the other has a mating groove, with the mating flange inserted into the mating groove; a baffle is installed on the side of the base near the cover by a plurality of second screws, and the baffle has a plurality of limiting holes, each corresponding to an oil cavity, the diameter of the limiting holes being smaller than the inner diameter of the first compression spring, and the baffle being located within the mating groove; a sealing rubber gasket is provided within the mating groove, and the sealing rubber gasket has through holes corresponding to the positions of the limiting holes, and the sealing rubber gasket is located on the side of the baffle away from the base.

[0021] In one embodiment, the sealing rubber gasket has at least two alignment protrusions, the positions of which correspond to the positions of the limiting holes, and the outer diameter of the alignment protrusions is equal to the diameter of the limiting holes.

[0022] In one embodiment, a first buffer rubber pad is fixed to the side of the abutment plate near the piston.

[0023] In one embodiment, a second buffer rubber pad is fixed to the side of the abutment plate away from the piston.

[0024] In one embodiment, a plurality of third compression springs are installed between the abutment plate and the cylinder head body, and the third compression springs are sleeved on the outside of the connecting rod.

[0025] In one embodiment, the cover has an oil injection hole that communicates with the oil cavity, and the cover is threadedly connected to the oil injection hole with an oil injection screw.

[0026] Compared with the prior art, this application has the following advantages:

[0027] This application provides an oil chamber on the cylinder head body, along with a first buffer plug, a second buffer plug, an abutment plate, a first compression spring, and a second compression spring. Hydraulic oil is then added to the oil chamber, which effectively improves the synergistic effect on the piston, reduces the collision intensity between the piston and the cylinder head, effectively protects the piston and cylinder head, and extends the service life of the hydraulic cylinder.

[0028] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0029] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:

[0030] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0031] Figure 1 An exploded schematic diagram of a hydraulic cylinder fitted with the cylinder head described in the embodiments of this application is shown.

[0032] Figure 2 An exploded view of the cylinder head body according to an embodiment of this application is shown;

[0033] Figure 3 A first cross-sectional schematic diagram of the cylinder head body according to an embodiment of this application is shown;

[0034] Figure 4 A second cross-sectional schematic diagram of the cylinder head body according to an embodiment of this application is shown;

[0035] Figure 5 A schematic diagram of the structure of the cap according to an embodiment of this application is shown;

[0036] Figure 6 A schematic diagram of the structure of the sealing rubber gasket according to an embodiment of this application is shown;

[0037] Figure 7This shows an overall cross-sectional schematic diagram of a hydraulic cylinder equipped with the cylinder head described in the embodiments of this application;

[0038] Figure 8 A first cross-sectional schematic diagram of the cylinder head of the hydraulic cylinder according to an embodiment of this application is shown;

[0039] Figure 9 A second cross-sectional schematic diagram of the cylinder head of the hydraulic cylinder according to an embodiment of this application is shown.

[0040] Explanation of the labels in the diagram:

[0041] 1. Cylinder block; 2. Piston; 3. Cylinder head body; 31. Base; 32. Cover; 321. Annular cavity; 322. Oil filling hole; 4. Oil chamber; 51. First buffer plug; 52. Second buffer plug; 6. Connecting rod; 7. Abutment plate; 81. First compression spring; 82. Second compression spring; 83. Third compression spring; 91. Butt flange; 92. Butt groove; 100. First screw; 101. Second screw; 102. Third screw; 11. Baffle; 111. Limiting hole; 12. Sealing rubber gasket; 121. Through hole; 122. Alignment ring; 131. First buffer rubber pad; 132. Second buffer rubber pad; 14. Oil filling screw. Detailed Implementation

[0042] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Reference Figure 1 - Figure 9This application provides a cylinder head for a hydraulic cylinder, which is mainly installed on the cylinder body 1 of a hydraulic cylinder. The hydraulic cylinder also includes a piston 2, which is located inside the cylinder body 1 and its rod passes through the cylinder head. The cylinder head includes a cylinder head body 3, in which several oil chambers 4 are formed and interconnected. One of a first buffer plug 51 or a second buffer plug 52 is installed in each oil chamber 4. A connecting rod 6 is fixed to the side of the first buffer plug 51 near the piston 2 and passes through the cylinder head body 3. A connecting plate 7 is fixedly connected to one end of the cylinder head body 3. The connecting plate 7 is annular. A first compression spring 81 is provided in the oil cavity 4 where the first buffer plug 51 is installed, and the first compression spring 81 is located on the side of the first buffer plug 51 away from the connecting rod 6. A second compression spring 82 is provided in the oil cavity 4 where the second buffer plug 52 is installed. The second compression spring 82 is fixedly connected to the side of the second buffer plug 52 near the piston 2. Hydraulic oil is injected into the part of the oil cavity 4 where the first buffer plug 51 is away from the piston 2 and the part of the oil cavity 4 where the second buffer plug 52 is away from the piston 2.

[0044] The following description, using a specific application scenario, further illustrates the hydraulic cylinder's operation. When piston 2 moves towards the cylinder head, it first contacts and pushes abutment plate 7. During this movement, abutment plate 7, driven by connecting rod 6, causes the first buffer plug 51 to move away from piston 2, thus compressing the first compression spring 81. Simultaneously, this causes hydraulic oil in the oil chamber 4 containing the first buffer plug 51 to move towards the oil chamber 4 containing the second buffer plug 52, pushing the second buffer plug 52 closer to piston 2. This process also compresses the second compression spring 82. It should be noted that the first and second buffer plugs 51 and 52 should have good sealing properties with the inner wall of the oil chamber 4. When piston 2 impacts abutment plate 7, the elastic force of the first compression spring 81 and the second compression spring 82, as well as the friction between the first buffer plug 51, the second buffer plug 52 and the oil chamber 4, can effectively improve the force relief effect on piston 2, reduce the collision intensity between piston 2 and cylinder head, effectively protect piston 2 and cylinder head, and improve the service life of hydraulic cylinder.

[0045] Reference Figure 2 , Figure 8 , Figure 9 As a specific embodiment of this application, the oil chambers 4 in the cylinder head body 3 are distributed in a circular array, and the positions of the first buffer plug 51 and the second buffer plug 52 are alternately arranged. That is, if the first buffer plug 51 is provided in one of the oil chambers 4, the second buffer plug is provided in the two adjacent oil chambers 4.

[0046] Based on specific usage scenarios, by arranging the oil chambers 4 in a circular array within the cylinder head body 3, and by alternately setting the first buffer plug 51 and the second buffer plug 52, the structure of the cylinder head body 3 can be made more symmetrical, thereby making the force and movement of the first buffer plug 51 and the second buffer plug 52 more uniform and balanced, thus improving the stability of the cylinder head body 3 in use.

[0047] Reference Figure 2 - Figure 4 As a specific embodiment of this application, the cylinder head body 3 includes a base 31 mounted on the cylinder body 1 by a plurality of third screws 102, and an oil chamber 4 is opened in the base 31. A cover 32 is installed on the side of the base 31 away from the piston 2 by a plurality of first screws 100. An annular cavity 321 is opened in the cover 32, and all the oil chambers 4 are interconnected through the annular cavity 321.

[0048] Based on specific usage scenarios, the cylinder head body 3 is designed as a split style of base 31 and cover 32, which facilitates the installation of the first buffer plug 51, the second buffer plug 52, the first compression spring 81, and the second compression spring 82, as well as subsequent maintenance and replacement.

[0049] Furthermore, refer to Figure 2 , Figure 4 , Figure 8 An oil injection hole 322 is provided on the cover 32, and the oil injection hole 322 is connected to the annular cavity 321. An oil injection screw 14 is threadedly connected to the cover 32 at the oil injection hole 322. After the cylinder head is assembled, the oil injection screw 14 is loosened, and then hydraulic oil is added into the annular cavity 321 from the oil injection hole 322 to fill the oil cavity 4. Finally, the oil injection screw 14 is tightened to ensure that the hydraulic oil does not leak.

[0050] Further, refer to 2- Figure 6 The cover 32 or the base 31 has a mating flange 91 and a mating groove 92. After the cover 32 and the base 31 are installed, the mating flange 91 is inserted into the mating groove 92. A baffle 11 is installed on the base 31 by several second screws 101. After the cylinder head of the oil cylinder is assembled, the baffle 11 is located in the mating groove 92. Several limiting holes 111 are opened on the baffle 11. The limiting holes 111 correspond one-to-one with the oil chamber 4. The diameter of the limiting holes 111 is smaller than the inner diameter of the first compression spring 81. A sealing rubber gasket 12 is provided in the mating groove 92. The sealing rubber gasket 12 is located on the side of the baffle 11 away from the base 31. A through hole 121 corresponding one-to-one with the position of the limiting hole 111 is opened on the sealing rubber gasket.

[0051] In combination with specific application scenarios, the setting of the mating groove 92 and the mating flange 91 and their cooperation can increase the connection area between the base 31 and the cover 32, making the cylinder head body 3 more robust and stable. In addition, the cooperation of the mating flange 91 and the mating groove 92, as well as the setting of the baffle 11 and the sealing rubber gasket 12, can also increase the connection sealing between the cover 32 and the base 31.

[0052] Furthermore, refer to Figure 3 and Figure 6 The sealing rubber gasket 12 has at least two circular alignment protrusions 122, and the alignment protrusions 122 correspond to the positions of the limiting holes 111. The outer diameter of the alignment protrusions 122 is equal to the diameter of the limiting holes 111.

[0053] In specific application scenarios, when installing the sealing rubber gasket 12, the alignment protrusion 122 is aligned with the limiting hole 111, and the alignment protrusion 122 is inserted into the limiting hole 111. In this way, the cooperation of at least two alignment protrusions 122 with the limiting hole 111 can fix the sealing rubber gasket 12 on the baffle 11, so that the sealing rubber gasket 12 will not change position during the installation process. This ensures that the corresponding position of the alignment limiting hole 111 and the adjusting hole on the sealing rubber gasket 12 will not deviate, and that hydraulic oil will not be blocked at the sealing rubber gasket 12, thereby making the hydraulic cylinder more stable in use.

[0054] Reference Figure 8 and Figure 9 A first buffer rubber pad 131 is installed on the side of the abutment plate 7 near the piston 2. The first buffer rubber pad 131 can reduce the collision intensity between the piston 2 and the abutment plate 7, thereby improving the protection effect on the piston 2 and the abutment plate 7 to a certain extent, and thus improving the stability of their use.

[0055] Reference Figure 8 and Figure 9 A second buffer rubber pad 132 is installed on the side of the abutment plate 7 away from the piston 2. The second buffer rubber pad 132 can reduce the collision intensity between the abutment plate 7 and the cylinder head body 3, and further improve the protection effect of the cylinder head body 3.

[0056] Reference Figure 8 and Figure 9 As a specific embodiment of this application, a third compression spring 83 is installed between the abutment plate 7 and the cylinder head body 3, and the third compression spring 83 is sleeved on the outside of the connecting rod 6.

[0057] By incorporating a third compression spring 83, the impact and collision resistance between the abutment plate 7 and the cylinder head body 3 can be further enhanced, thus improving the force relief effect on the piston 2, enhancing the protection of the cylinder head and piston 2, and consequently extending the service life of the hydraulic cylinder. It should be understood that the various processes described above can be used, with steps rearranged, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application is achieved; no limitation is imposed herein.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cylinder head for a hydraulic cylinder, mounted on the cylinder body (1) of a hydraulic cylinder, the hydraulic cylinder further comprising a piston (2) located within the cylinder body (1), the cylinder head comprising a cylinder head body (3), characterized in that: Several oil chambers (4) are formed inside the cylinder head body (3), and the several oil chambers (4) are interconnected; Several first buffer plugs (51) and several second buffer plugs (52) are installed in different oil chambers (4); The connecting rod (6) is fixed to the side of the first buffer screen near the piston (2), and the connecting rod (6) passes through the cylinder head body (3). Abutment plate (7) is fixed to one end of the connecting rod (6) extending out of the cylinder head body (3), and the abutment plate (7) is annular; The first compression spring (81) is installed in the oil chamber (4), and one end of the first compression spring (81) is fixed to the side of the first buffer plug (51) away from the connecting rod (6); The second compression spring (82) is installed in the oil chamber (4), and one end of the second compression spring (82) is fixed to the side of the second buffer plug (52) near the piston (2); The oil chamber (4) located in the portion of the first buffer plug (51) and the second buffer plug (52) away from the piston (2) is filled with hydraulic oil.

2. The cylinder head according to claim 1, characterized in that: Several oil chambers (4) are distributed in a circumferential array within the cylinder head body (3), and the positions of the first buffer plug (51) and the second buffer plug (52) are alternately arranged.

3. The cylinder head according to claim 1, characterized in that: The cylinder head body (3) includes: The base (31) has the oil cavity (4) located inside it. A cover (32) is fixed to the base (31) on the side away from the piston (2) by a plurality of first screws (100). An annular cavity (321) is formed inside the cover (32), and the oil cavities (4) are interconnected through the annular cavity (321).

4. The cylinder head according to claim 3, characterized in that: One of the base (31) and the cover (32) has a mating flange (91), and the other has a mating groove (92). The mating flange (91) is inserted into the mating groove (92). A baffle (11) is installed on the side of the base (31) near the cover (32) by several second screws (101). The baffle (11) has several limiting holes (111). The limiting holes (111) correspond one-to-one with the oil cavity (4). The diameter of the limiting holes (111) is smaller than the inner diameter of the first compression spring (81). The baffle (11) is located in the mating groove (92). A sealing rubber gasket (12) is provided in the mating groove (92). The sealing rubber gasket has through holes (121) that correspond one-to-one with the positions of the limiting holes (111). The sealing rubber gasket (12) is located on the side of the baffle (11) away from the base (31).

5. The cylinder head according to claim 4, characterized in that: The sealing rubber gasket (12) has at least two alignment protrusions (122), the position of the alignment protrusions (122) corresponds to the position of the limiting hole (111), and the outer diameter of the alignment protrusions (122) is equal to the diameter of the limiting hole (111).

6. The cylinder head according to claim 1, characterized in that: The abutment plate (7) is fixed to the side of the piston (2) with a first buffer rubber pad (131).

7. The cylinder head according to claim 1, characterized in that: A second buffer rubber pad (132) is fixed to the side of the abutment plate (7) away from the piston (2).

8. The cylinder head according to claim 1, characterized in that: A plurality of third compression springs (83) are installed between the abutment plate (7) and the cylinder head body (3), and the third compression springs (83) are sleeved on the outside of the connecting rod (6).

9. The cylinder head according to claim 3, characterized in that: The cover (32) has an oil injection hole (322) which is connected to the annular cavity (321). The cover (32) is threaded with an oil injection screw (14) at the oil injection hole (322).

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