阅读说明：本技术 一种电磁干扰屏蔽装置 (Electromagnetic interference shielding device ) 是由 张超 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种电磁干扰屏蔽装置,包括金属屏蔽罩,金属屏蔽罩上安装有侧滑门,所述侧滑门与金属屏蔽罩之间安装有液压挺杆,液压挺杆的缸体轴接在金属屏蔽罩上,缸体内活动插接有活塞杆,活塞杆的顶部固定安装在把手上,把手固定安装在侧滑门上；活塞杆上安装有活塞环,活塞环与缸体的内壁密封接触,缸体的内壁沿轴向设置有若干个凹槽,凹槽的深度从凹槽中间点向凹槽两端逐渐减小。本发明能够改进现有技术的不足,在不使用电动驱动装置的前提下,进一步便于徒手操作屏蔽装置的侧滑门。(The invention discloses an electromagnetic interference shielding device, which comprises a metal shielding cover, wherein a side sliding door is arranged on the metal shielding cover, a hydraulic tappet is arranged between the side sliding door and the metal shielding cover, a cylinder body of the hydraulic tappet is axially connected on the metal shielding cover, a piston rod is movably inserted in the cylinder body, the top of the piston rod is fixedly arranged on a handle, and the handle is fixedly arranged on the side sliding door; the piston rod is provided with a piston ring, the piston ring is in sealing contact with the inner wall of the cylinder body, the inner wall of the cylinder body is provided with a plurality of grooves along the axial direction, and the depth of the grooves is gradually reduced from the middle points of the grooves to the two ends of the grooves. The invention can improve the defects of the prior art, and is further convenient for operating the side sliding door of the shielding device by hands on the premise of not using an electric driving device.)

1. The utility model provides an electromagnetic interference shield assembly, includes metal shielding cover (1), installs sideslip door (2), its characterized in that on metal shielding cover (1): a hydraulic tappet (3) is arranged between the side sliding door (2) and the metal shielding cover (1), a cylinder body (4) of the hydraulic tappet (3) is connected to the metal shielding cover (1) in a shaft mode, a piston rod (5) is movably inserted into the cylinder body (4), the top of the piston rod (5) is fixedly arranged on a handle (6), and the handle (6) is fixedly arranged on the side sliding door (2); the piston rod (5) is provided with a piston ring (7), the piston ring (7) is in sealing contact with the inner wall of the cylinder body (4), the inner wall of the cylinder body (4) is provided with a plurality of grooves (8) along the axial direction, and the depth of the grooves (8) is gradually reduced from the middle points of the grooves (8) to the two ends of the grooves (8).

2. The EMI shield as set forth in claim 1, wherein: the piston ring is characterized in that a sealing groove (9) is formed in the inner side of the piston ring (7), a blocking piece (10) is fixed on the piston rod (5), a sealing ring (11) matched with the sealing groove (9) is fixed on the outer side of the blocking piece (10), and a first spring (12) is connected between the blocking piece (10) and the piston ring (7).

3. The EMI shield as set forth in claim 2, wherein: and the top surface and the bottom surface of the piston ring (7) are respectively fixed with an annular guide plate (13), and the top of the annular guide plate (13) is provided with an outwards inclined arc-shaped part (14).

4. The EMI shield as set forth in claim 2, wherein: and the top surface and the bottom surface of the baffle plate (10) are respectively fixed with a filter screen (15).

5. The EMI shield as set forth in claim 1, wherein: the two ends of the cylinder body (4) are connected to an oil storage tank (17) through oil pipes (16) respectively, stop valves (18) are installed on the oil pipes (16), and exhaust valves (19) are installed at the top of the oil storage tank (17).

6. The EMI shield as set forth in claim 1, wherein: the metal shielding cover (1) is provided with a slot (20) which is in plug-in fit with the side sliding door (2), two rubber strips (21) are fixed on the inner side of the slot (20), and a metal elastic sheet (22) is arranged between the two rubber strips (21).

7. The EMI shielding apparatus of claim 6, wherein: and a metal strip (23) in sliding contact with the metal elastic sheet (22) is mounted on the side sliding door (2) through a bolt.

Technical Field

The invention relates to an electromagnetic shielding device, in particular to an electromagnetic interference shielding device.

Background

With the development of wireless communication technology, various electromagnetic waves are filled in the space of our lives. Electromagnetic waves have interfering effects on the commissioning and use of some precision instruments. In addition, in some confidential places, direct electromagnetic shielding is an important means for ensuring safety. In all of the above scenarios, it is necessary to use electromagnetic interference shielding devices. In order to ensure the shielding effect, the shell of the electromagnetic interference shielding device is made of a thicker metal plate, although the side sliding door with the roller wheels can be installed to facilitate the door opening and closing operation to a certain extent, the side sliding door is heavy, and the door opening and closing operation is usually assisted by an electric driving device, so that the equipment cost is increased, and the electromagnetic shielding effect is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an electromagnetic interference shielding device, which can solve the defects of the prior art and is further convenient for operating a side sliding door of the shielding device by hands on the premise of not using an electric driving device.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

An electromagnetic interference shielding device comprises a metal shielding cover, wherein a side sliding door is arranged on the metal shielding cover, a hydraulic tappet is arranged between the side sliding door and the metal shielding cover, a cylinder body of the hydraulic tappet is axially connected to the metal shielding cover, a piston rod is movably inserted in the cylinder body, the top of the piston rod is fixedly arranged on a handle, and the handle is fixedly arranged on the side sliding door; the piston rod is provided with a piston ring, the piston ring is in sealing contact with the inner wall of the cylinder body, the inner wall of the cylinder body is provided with a plurality of grooves along the axial direction, and the depth of the grooves is gradually reduced from the middle points of the grooves to the two ends of the grooves.

Preferably, a sealing groove is formed in the inner side of the piston ring, a blocking piece is fixed on the piston rod, a sealing ring matched with the sealing groove is fixed on the outer side of the blocking piece, and a first spring is connected between the blocking piece and the piston ring.

Preferably, the top surface and the bottom surface of the piston ring are respectively fixed with an annular guide plate, and the top of the annular guide plate is provided with an arc-shaped part which inclines outwards.

Preferably, the top surface and the bottom surface of the baffle plate are respectively fixed with a filter screen.

Preferably, the two ends of the cylinder body are respectively connected to the oil storage tank through oil pipes, stop valves are installed on the oil pipes, and exhaust valves are installed on the top of the oil storage tank.

Preferably, the metal shielding cover is provided with a slot which is matched with the side sliding door in an inserting mode, two rubber strips are fixed on the inner side of the slot, and a metal elastic sheet is arranged between the two rubber strips.

Preferably, a metal strip in sliding contact with the metal elastic sheet is mounted on the side sliding door through a bolt.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, by additionally arranging a specially designed hydraulic tappet device, the large resistance at the two ends of the displacement range and the small resistance in the middle of the displacement range of the hydraulic tappet are realized by utilizing the change of the gap between the piston ring and the groove, the deceleration effect on the sliding door is realized by utilizing the large resistance at the two ends of the displacement range of the hydraulic tappet, and the purpose of reducing the pushing and pulling difficulty is realized by utilizing the small resistance in the middle of the displacement range of the hydraulic tappet. When the piston rod is subjected to a large push-pull force (at the initial stage of opening or closing the door), the baffle plate is separated from the piston ring, so that the oil flow cross section can be increased, and the push-pull resistance of the sliding door can be reduced. The annular guide plate is used for reducing the turbulent flow of oil flowing between the groove and the gap between the baffle and the piston ring, and is used for limiting the maximum displacement of the piston ring. The filter screen on the baffle is used for filtering the oil, and the filtering process does not cause extra resistance to the oil flow. Through at the external connection oil storage tank of cylinder body, can open the oil circuit between cylinder body and the oil storage tank under the special circumstances to further increase the sectional area that fluid circulates, thereby guarantee the smooth push-and-pull of sideslip door. In addition, the exhaust valve on the oil storage tank can also timely remove air bubbles in the oil in the flowing process of the oil, and the flowing smoothness of the oil is guaranteed. The splicing structure between the metal shielding cover and the side sliding door can ensure the sealing performance of the side sliding door and ensure good electromagnetic shielding effect. When the metal strips are mounted separately, they can be replaced easily after wear has occurred.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

Fig. 2 is a structural view of a hydraulic lifter according to an embodiment of the present invention.

FIG. 3 is a block diagram of a socket in an embodiment of the present invention.

In the figure: 1. a metal shield case; 2. a side sliding door; 3. a hydraulic tappet; 4. a cylinder body; 5. a piston rod; 6. a handle; 7. a piston ring; 8. a groove; 9. a sealing groove; 10. a baffle plate; 11. a seal ring; 12. a first spring; 13. an annular baffle; 14. an arc-shaped portion; 15. filtering with a screen; 16. an oil pipe; 17. an oil storage tank; 18. a stop valve; 19. an exhaust valve; 20. a slot; 21. a rubber strip; 22. a metal spring sheet; 23. a metal strip; 24. and a diversion trench.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1-3, a specific embodiment of the present invention includes a metal shielding case 1, a side sliding door 2 is installed on the metal shielding case 1, a hydraulic tappet 3 is installed between the side sliding door 2 and the metal shielding case 1, a cylinder body 4 of the hydraulic tappet 3 is coupled to the metal shielding case 1, a piston rod 5 is movably inserted into the cylinder body 4, the top of the piston rod 5 is fixedly installed on a handle 6, and the handle 6 is fixedly installed on the side sliding door 2; the piston rod 5 is provided with a piston ring 7, the piston ring 7 is in sealing contact with the inner wall of the cylinder body 4, the inner wall of the cylinder body 4 is provided with a plurality of grooves 8 along the axial direction, and the depth of each groove 8 is gradually reduced from the middle point of each groove 8 to the two ends of each groove 8. Through the change in clearance between piston ring 7 and the recess 8, realize hydraulic tappet 3 at the great resistance at displacement scope both ends and at the less resistance at displacement scope middle part, utilize the big resistance at hydraulic tappet 3 displacement scope both ends to realize the speed reduction effect to sideslip door 2, utilize the purpose that the little resistance in hydraulic tappet 3 displacement scope middle part realized reducing the push-and-pull degree of difficulty. The inner side of the piston ring 7 is provided with a sealing groove 9, a separation blade 10 is fixed on the piston rod 5, a sealing ring 11 matched with the sealing groove 9 is fixed on the outer side of the separation blade 10, and a first spring 12 is connected between the separation blade 10 and the piston ring 7. When the piston rod 5 is subjected to a large push-pull force (at the initial stage of opening or closing the door), the baffle 10 is separated from the piston ring 7, so that the oil flow cross section can be increased, and the push-pull resistance of the side sliding door 2 can be reduced. The top surface and the bottom surface of the piston ring 7 are respectively fixed with an annular guide plate 13, and the top of the annular guide plate 13 is provided with an arc-shaped part 14 which inclines outwards. The annular guide plate 13 is used for reducing the turbulent flow of oil flowing between the groove 8 and the gap between the baffle plate 10 and the piston ring 7 and limiting the maximum displacement of the piston ring 7. The top and bottom surfaces of the baffle plate 10 are respectively fixed with a filter screen 15. The screen 15 of the baffle 10 is used to filter the oil, and this filtering process does not cause additional resistance to the oil flow. Two ends of the cylinder body 4 are respectively connected to an oil storage tank 17 through an oil pipe 16, a stop valve 18 is installed on the oil pipe 16, and an exhaust valve 19 is installed at the top of the oil storage tank 17. Through connect oil storage tank 17 outside cylinder body 4, can open the oil circuit between cylinder body 4 and oil storage tank 17 under the special circumstances to further increase the sectional area that the fluid circulates, thereby guarantee the smooth push-and-pull of sideslip door 2. In addition, the exhaust valve 19 on the oil storage tank 17 can also timely remove air bubbles in the oil liquid in the flowing process of the oil liquid, and the smooth flowing of the oil liquid is ensured. The metal shielding cover 1 is provided with a slot 20 which is in plug-in fit with the side sliding door 2, two rubber strips 21 are fixed on the inner side of the slot 20, and a metal elastic sheet 22 is arranged between the two rubber strips 21. The side sliding door 2 is provided with a metal strip 23 which is in sliding contact with the metal elastic sheet 22 through a bolt. The plug-in structure between the metal shielding cover 1 and the side sliding door 2 can ensure the sealing performance of the side sliding door 2 and ensure good electromagnetic shielding effect. The separately mounted metal strips 23 facilitate replacement after wear has occurred.

In addition, a plurality of guide grooves 24 which are radially arranged are respectively arranged on the top surface and the bottom surface of the piston ring 7, and the guide grooves 24 are positioned on the inner side of the annular guide plate 13. The diversion grooves 24 not only can reduce the turbulence on the surface of the piston ring 7, but also more importantly, the diversion grooves 24 can improve the horizontal flow of water flow in the filter screen 15, thereby improving the filtering efficiency of the filter screen 15.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.