CN204188672U - A kind of plug-type shielded box - Google Patents

Abstract

The utility model discloses a push-pull type shielding box, which comprises a bottom plate, a box body, an upper cover and a push-pull device arranged between the box body and the upper cover; the box body is fixedly connected to the bottom plate, and the upper The cover is closed on the box body to form the main structure of the shielding box; the push-pull device includes rodless cylinders and drive plates fixed on both sides of the box body, and one end of the drive plate is connected to the upper cover. The other end of the drive plate is connected to the slider of the rodless cylinder, and the rodless cylinder drives the upper cover to reciprocate relative to the box body through the drive plate to realize the push-pull type of the shielding box Opening and closing; the utility model adopts the relatively sliding structure of the upper cover and the box body, which cleverly solves the problems of the convenience and safety of the traditional shielding box, and has flexible movements and precise positioning. The position of the test fixture in the body is fixed, which is especially suitable for use in an automatic test device.

Description

A push-pull shielding box

technical field

The utility model relates to a shielding box which provides a shielding environment for testing electronic products.

Background technique

Electromagnetic Interference (EMI) appears along with the development of electronics and electrical technology, and there will be electromagnetic interference in all electronic and electrical technology fields. Electromagnetic interference generated by electronic and electrical systems or equipment in extensive use will affect human health, and will also affect and harm the safety and reliability of electronic, electrical systems or equipment. The harsh electromagnetic environment often makes electronic and electrical systems or equipment unable to work normally, and even causes failures and accidents, or affects the data of electronic product testing.

However, with the improvement of the accuracy requirements of signal transmission in wireless communication products, the requirements for anti-electromagnetic interference performance of products are getting higher and higher. At present, mobile phones, PDAs and related host circuit boards need to be tested for relevant electromagnetic characteristics in the development stage. However, in the general open environment, there are extremely complex and serious electromagnetic interference, which is easy to affect the accuracy of the test. Therefore, most of the above tests must be performed in an environment with low electromagnetic interference (even without electromagnetic wave interference) in order to achieve better test accuracy.

A common device that provides a low electromagnetic interference (no electromagnetic interference) test environment is a shielding box with signal shielding function. At present, the drawer-type shielding box is commonly used in the automated shielding test equipment. The opening and closing of the shielding box is realized by setting the carrier on the slide rail. The tested product that has completed the test is taken out of the shielding box. When the vehicle enters and exits the shielding box, there will be a certain impact on the box body, which is prone to tremors and cause changes in the position of the vehicle, resulting in failure.

Utility model content

The purpose of this utility model is to propose a push-pull type shielding box in which the box body and the upper cover slide relatively to realize opening and closing in order to solve the above technical problems.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a push-pull type shielding box, including a bottom plate, a box body, an upper cover and a push-pull device between the box body and the upper cover; the box body is fixedly connected On the bottom plate, the upper cover is closed on the box body to form the main structure of the shielding box; the push-pull device includes rodless cylinders and drive plates fixedly arranged on both sides of the box body, the One end of the drive plate is connected to the upper cover, and the other end of the drive plate is connected to the slider of the rodless cylinder, and the rodless cylinder drives the upper cover relative to the box through the drive plate. Reciprocating motion realizes the push-pull opening and closing of the shielding box.

In the present invention, the push-pull device further includes a mounting plate for fixing the rodless cylinder on the box body, and the rodless cylinder is connected and fixed on the mounting plate through two brackets.

In the present utility model, the push-pull device is provided with a guide slide rail installed on the bottom plate along the slide track of the drive plate, and a guide block matched with the guide slide rail is provided at the bottom of the drive plate.

In the utility model, a limit block is respectively arranged at both ends of the guide rail, and a limit bolt is respectively arranged on the limit block, and when the drive plate runs to both ends of the rodless cylinder, it pushes The above-mentioned limit bolt, the limit bolt also plays a buffering role.

In the present utility model, the push-pull device also includes a connecting plate, the connecting plate is fixed on the top of the upper cover and its two ends protrude from both sides of the upper cover and are respectively connected with the drive plate, the push-pull The device drives the upper cover to reciprocate relative to the box through the connecting plate.

In the present utility model, the push-pull device is provided with a fretting structure for forming a flexible connection between the connecting plate and the driving plate, and the fretting structure includes a fretting counterbore arranged at the end of the connecting plate , a micro-motion bolt arranged in the micro-motion counterbore and connected and fixed with the drive plate, and a micro-motion cover plate covered on the micro-motion counterbore, through which the micro-motion structure can coordinate two The movement between the rod cylinders is not synchronized.

In the present utility model, the push-pull device is provided with a jacking structure for vertically lifting the upper cover relative to the box body, the jacking structure includes a jacking cylinder arranged on the driving plate, and The jacking plate between the jacking cylinder piston rod and the upper cover, the driving plate and the upper cover are connected to each other through the jacking structure.

In the present utility model, the push-pull device is provided with a tank chain for protecting the trachea and a limiting groove for limiting the tank chain, the limiting groove is installed on the mounting plate, and the tank One end of the chain is connected to the top of the drive plate, and the other end of the tank chain is connected and fixed to the end of the limiting groove.

In the utility model, the box body is provided with data communication interfaces such as an RF interface for connecting to an external test system and a filter connector.

In the utility model, the four corners of the bottom plate are respectively provided with handles, and the two ends of the upper cover parallel to its own sliding direction are respectively provided with handles, so as to facilitate the movement of the shielding box.

In the utility model, the shielding box that is convenient for switching is also provided with a test fixture for clamping the tested product, and the test fixture is used to facilitate the wiring and pick-and-place of the tested product, thereby improving the test efficiency.

The utility model adopts the relatively sliding structure of the upper cover and the box body, which ingeniously solves the problems in the convenience and safety of the traditional shielding box flip type and drawer type opening and closing; when the push-pull shielding box is running, it is first lifted The cylinder lifts the upper cover out of the box and then is pulled and slid to the designated position by the rodless cylinder. After putting the tested product, the upper cover is pulled back to the original position by the rodless cylinder and then closed by the jacking cylinder. The whole process The movement is flexible, the positioning is precise, the position of the box and the test fixture set in the box are fixed during the whole action process, and it is especially suitable for use in an automatic test device.

Description of drawings

Fig. 1 is a schematic structural view of a push-pull shielding box in an embodiment of the utility model;

Fig. 2 is a schematic structural view of a push-pull shielding box without a bottom plate in an embodiment of the utility model;

Fig. 3 is a schematic structural view of a push-pull device in an embodiment of the utility model;

Fig. 4 is a schematic structural view of the driving board in an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the rodless cylinder in an embodiment of the utility model;

Fig. 6 is a schematic structural view of the guide rail in an embodiment of the present invention;

Fig. 7 is a schematic structural view of the jacking cylinder in an embodiment of the utility model;

Fig. 8 is a structural schematic diagram of the fretting structure in an embodiment of the present invention.

Detailed ways

In order to illustrate the technical solution of the utility model more clearly, the technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the following descriptions are only some embodiments of the utility model. For those skilled in the art, other embodiments can also be obtained according to these embodiments without paying creative efforts.

A kind of push-pull type shielding box, referring to Fig. 1, Fig. 2, comprises bottom plate 1, box body 2, upper cover 3 and the push-pull device 4 that is arranged between box body 2 and upper cover 3; Box body 2 is fixedly connected on the bottom plate 1 , the bottom plate 1 is the carrier for installing peripheral equipment of the shielding box, and the shielding box can be installed and fixed on other equipment through the bottom plate 1. The upper cover 3 is closed on the box body 2 to form the main structure of the shielding box; the cover surface between the box body 2 and the upper cover 3 can adopt a concave-convex groove structure to achieve the sealing effect, and can also play a certain positioning role . The relative sliding between the box body 2 and the upper cover 3 is realized by the push-pull device 4. Specifically, the push-pull device 4 includes a rodless cylinder 41 and a drive plate 42 fixedly arranged on both sides of the box body 2, and one end of the drive plate 42 is connected to the The upper cover 3 is connected, and the other end of the drive plate 42 is connected with the slider 411 of the rodless cylinder 41. The rodless cylinder 41 drives the upper cover 3 to perform horizontal reciprocating movement relative to the box body 2 through the drive plate 42, so as to realize the push and pull of the shielding box open and close.

Referring to Fig. 3, the push-pull device 4 also includes a mounting plate 43 for fixing the rodless cylinder 41 on the box body 2, and the mounting plate 43 is locked and fixed on the side wall of the box body 2 using fasteners such as screws or bolts, Both ends of the rodless cylinder 41 are connected and fixed on the mounting plate 43 through two brackets 431 , and the mounting plate 43 provides support for the stable operation of the rodless cylinder 41 .

Referring to Fig. 4, the driving plate 42 provides power to drive the upper cover 3 to slide through the rodless cylinder 41 slider 411. The two-point connection makes the running stability of the driving plate 42 not high, which greatly accelerates the loss of the rodless cylinder 41 slider 411. The upper cover 3 is also prone to jamming during the sliding process. For this reason, the push-pull device 4 is provided with a guide rail 44 installed on the base plate 1 along the sliding track of the drive plate 42, and the bottom of the drive plate 42 is provided with a guide block 421 matched with the guide slide rail 44; specifically, the guide slide rail 44 is a trapezoidal guide rail, and a dovetail groove is provided on the guide block 421 to provide precise guidance and auxiliary support for the drive plate 42 .

Referring to Fig. 1 and Fig. 6, a limit block 441 is respectively arranged at both ends of the guide slide rail 44, and a limit bolt 442 is respectively arranged on the limit block 441, and when the drive plate 42 runs to both ends of the rodless cylinder 41, it pushes up the upper limit. Position bolt 442, the limit bolt 442 plays a position-limiting and buffering role at the same time, preventing the drive plate 42 from colliding with the two ends of the rodless cylinder 41.

The shielding box described in the embodiment is generally used in automated testing equipment. Referring to Figures 1 and 2, the shielding box needs to be installed in the rack of the automated testing equipment and debugged. In order to facilitate the handling of the shielding box during installation and debugging And position adjustment, the four corners of the bottom plate 1 are respectively provided with a handle 5; and the two ends of the upper cover 3 parallel to its own sliding direction are respectively provided with a handle 5, which is convenient for the later maintenance and installation of the shielding box.

In order to carry out corresponding tests on the tested product in the shielding box, referring to Fig. 1, a test fixture 5 for clamping the tested product is arranged in the shielded box, and the wiring and pick-and-place of the tested product are facilitated by the test fixture 5, improving Test efficiency; referring to FIG. 2 , at the same time, data communication interfaces 7 such as RF radio frequency interfaces and filter connectors for connecting external test systems are set on the box body 2 . The type of the test fixture 5 and the number of specifications of the data communication interface 7 can be adjusted accordingly according to specific test requirements, and are not specifically limited here.

In a specific embodiment, since the push-pull device 4 drives the upper cover 3 to reciprocate and slide through the two rodless cylinders 41 arranged on both sides of the box body 2, due to factors such as the accuracy error and installation accuracy of the rodless cylinder 41 itself It is easy to cause the actions of the rodless cylinders 41 on both sides of the box body 2 to be out of sync. For this reason, the push-pull device 4 is provided with a connecting plate 45 for synchronizing the movement speed of the rodless cylinder 41 on both sides of the box body 2. Referring to FIGS. The top and both ends protrude from both sides of the upper cover 3, and the two ends of the connecting plate 45 are respectively connected with the driving plate 42 by using bolts, so that the driving plate 42 is not directly fixed on the upper cover 3 but indirectly drives the upper cover 3 through the connecting plate 45 The reciprocating movement relative to the box body 2 makes the two rodless cylinders 41 run synchronously.

In a specific embodiment, although the connecting plate 45 can synchronize the operating speeds of the rodless cylinders 41 on both sides of the box body 2, it can only be fine-tuned. The sliding posture of the cover 3 is deflected and easily stuck or even stuck. If there is a certain gap between the driving plate 42 and the connecting plate 45, the above problems can be completely solved. For this reason, the push-pull device 4 is provided with a fretting structure 49 for forming a six-degree-of-freedom movable connection in space between the connecting plate 45 and the driving plate 42. Referring to FIG. The moving counterbore 451, the micro-moving bolt 492 arranged in the micro-moving counterbore 451 and fixedly connected with the driving plate 42, and the micro-moving cover plate 493 covered on the micro-moving counterbore 451; specifically, the micro-moving bolt 492 The length is longer than that of ordinary bolts and the diameter of the screw rod of the micro-motion bolt 492 and the diameter of the micro-motion counterbore 451 have a large difference. There is a certain distance between the stepped surfaces and the micro-movement cover plate 493, so that the connection plate 45 and the driving plate 42 can realize the movable link of six degrees of freedom in space. Through the adjustment of the above-mentioned micro-motion structure 49, even if the upper cover 3 has a relatively serious posture deformation during the sliding process due to the large out-of-synchronization of the operating speed of the rodless cylinder 41 on both sides of the box body 2, it can also be adjusted through the micro-motion structure. 49 can be adjusted and adapted without jamming, which greatly improves the reliability of the shielding box operation.

In a specific embodiment, referring to Fig. 4 and Fig. 7, the covering surface between the box body 2 and the upper cover 3 wears quickly in the process of repeated sliding friction, especially for ensuring the reliable sealing of the covering surface. The flexible conductive material layer is easily damaged; meanwhile, the tested product loaded on the test fixture 5 is also easily scratched by the upper cover 3 , so that the arrangement of the test fixture 5 is limited by the upper cover 3 . For this reason, during the opening process of the shielding box, the upper cover 3 adds an upward lifting action to allow a certain vertical space, and then slides and pushes it out. For this reason, the push-pull device 4 is provided with a jacking structure that lifts the loam cake 3 vertically relative to the box body 2. The jacking structure includes a jacking cylinder 48 that is arranged on the drive plate 42, and is arranged on the jacking cylinder 48 piston rod and The lifting plate 491 between the upper cover 3, the drive plate 42 and the upper cover 3 are connected to each other through a lifting structure.

Specifically, referring to Fig. 7, the jacking cylinder 48 has three piston rods arranged in parallel. In order to ensure the synchronous action of the three piston rods, the ends of the three piston rods are uniformly connected and fixed on the piston plate 482, and the jacking plate 491 uses bolts. The fasteners are locked and fixed with the piston plate 482, and the above-mentioned micro-movement structure 49 is arranged between the lifting plate 491 and the upper cover 3 to be movably connected with each other.

Preferably, since there is mutual movement between the main components of the push-pull device 4, the air pipes of each cylinder are also easy to be entangled and knotted or damaged by scratches during the movement of the cylinders, resulting in a short service life of the air pipes and easy Interfering with the normal movement of moving parts. Therefore, with reference to Fig. 3, push-pull device 4 is provided with the tank chain 47 that is used to protect trachea and the limit groove 46 that is used to limit the tank chain 47, and trachea and other wires are all arranged in tank chain 47 inside, and the limit groove 46 is installed on the mounting plate 43, and one end of the tank chain 47 is connected to the upper end of the driving plate 42, and the other end of the tank chain 47 is connected and fixed with the end of the limit groove 46, and the trachea is pulled and protected during operation.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present utility model.

Claims (10)

1. a plug-type shielded box, is characterized in that: the push-pull device at fixed (4) comprising base plate (1), casing (2), upper cover (3) and arrange between described casing (2) and upper cover (3);

Described casing (2) is fixedly connected on described base plate (1), and described upper cover (3) covers in the upper agent structure forming shielded box of described casing (2);

Described push-pull device at fixed (4) comprises the Rodless cylinder (41) and drive plate (42) that are fixedly installed on described casing (2) both sides respectively;

Described drive plate (42) one end is connected with described upper cover (3), and the other end of described drive plate (42) is connected with the slide block (411) of described Rodless cylinder (41);

Described Rodless cylinder (41) drives the relatively described casing (2) of described upper cover (3) to make horizontal reciprocating movement by described drive plate (42), realizes the plug-type keying of shielded box.

2. a kind of plug-type shielded box as claimed in claim 1, it is characterized in that: described push-pull device at fixed (4) also comprises the installing plate (43) for being fixed on by described Rodless cylinder (41) on described casing (2), and described Rodless cylinder (41) is fastened on described installing plate (43) by two supports (431).

3. a kind of plug-type shielded box as claimed in claim 1, it is characterized in that: described push-pull device at fixed (4) is provided with along the sliding trace of described drive plate (42) directive slide track (44) be arranged on described base plate (1), described drive plate (42) bottom is provided with the orienting lug (421) matched with described directive slide track (44).

4. a kind of plug-type shielded box as claimed in claim 3, it is characterized in that: described directive slide track (44) two ends are respectively arranged with a limited block (441), described limited block (441) is respectively arranged with a caging bolt (442), when described drive plate (42) runs to described Rodless cylinder (41) two ends, pushes up upper described caging bolt (442).

5. a kind of plug-type shielded box as claimed in claim 1, it is characterized in that: described push-pull device at fixed (4) also comprises web joint (45), described web joint (45) is fixed on described upper cover (3) top and two ends are given prominence to described upper cover (3) both sides and are connected with described drive plate (42) respectively, and described push-pull device at fixed (4) drives the relatively described casing (2) of described upper cover (3) to make horizontal reciprocating movement by described web joint (45).

6. a kind of plug-type shielded box as claimed in claim 5, it is characterized in that: described push-pull device at fixed (4) is provided with for forming the micromotion structure (49) be flexibly connected between described web joint (45) with drive plate (42), described micromotion structure (49) comprises the fine motion counterbore (451) being arranged on described web joint (45) end, to be arranged in described fine motion counterbore (451) and the fine motion bolt (492) be connected and fixed with described drive plate (42) and cover the fine motion cover plate (493) be located on described fine motion counterbore (451).

7. a kind of plug-type shielded box as claimed in claim 1, it is characterized in that: described push-pull device at fixed (4) is provided with by the climbing structure of vertical for relatively described for described upper cover (3) casing (2) jacking, described climbing structure comprises the jacking cylinder (48) be arranged on described drive plate (42), be arranged on the raising plate (491) between described jacking cylinder (48) piston rod and upper cover (3), be interconnected by described climbing structure between described drive plate (42) and upper cover (3).

8. a kind of plug-type shielded box as claimed in claim 2; it is characterized in that: described push-pull device at fixed (4) is provided with for the protection of the tank chain (47) of tracheae and for carrying out spacing stopper slot (46) to described tank chain (47); described stopper slot (46) is arranged on described installing plate (43); described tank chain (47) one end is connected to described drive plate (42) upper end, and the end of described tank chain (47) other end and described stopper slot (46) is connected and fixed.

9. a kind of plug-type shielded box as claimed in claim 1, is characterized in that: described casing (2) is provided with the data communication interface (7) for connecting outer testing system.

10. a kind of plug-type shielded box as claimed in claim 1, is characterized in that: described in be convenient to switch shielded box in be also provided with test fixture (5) for clamping tested product.