Housing of PLC module

Abstract

The housing comprises a housing body and a cover body, the cover body is detachably arranged on one side of an opening of the housing body, one side face of the housing body is provided with a track groove used for being matched with an installation guide rail in an electrical cabinet, one side face of the track groove is provided with an insertion groove, the two sides of the insertion groove are limiting groove walls, and the limiting groove walls are arranged in the track groove. A slot is formed in one side of the cover body, the slot is communicated with the rail groove, a clamping piece is arranged in the slot, the other side of the rail groove is provided with a blocking piece protruding out of the upper portion of the rail groove, the rail groove penetrates through the side face of the shell and the side face of the cover body, the shell is further provided with an L-shaped plug pin and a plug hole, and the L-shaped plug pin and the plug hole are arranged on the two sides of the shell respectively. The L-shaped bolt is opposite to the insertion hole in position, and a movable lock rod is arranged in the insertion hole. According to the utility model, the combination or separation of two adjacent PLC modules can be easily realized through the action of simply moving the lock rod, and the mounting and dismounting processes are simplified.

Description

Technical Field

[0001] This solution relates to the field of track-mounted electricals, and more particularly to a housing for a PLC module. Background Art

[0002] PLC is a currently mature modular electrical control system, which has many advantages such as stable operation, easy fault finding, and modular replaceability, and plays a crucial role in the field of modern industrial control.

[0003] In practical applications, PLC modules often need to be combined in multiple modules to meet complex control requirements. Currently, the connection between multiple-module PLCs usually adopts a snap connection method. The module is designed with snaps or slots, and these snaps can closely cooperate with the corresponding structures on adjacent modules. Once the module is inserted in place, the snaps will automatically lock to ensure a firm connection between the modules. However, in practical applications, if the installer does not follow the correct steps during installation, or uses excessive force, the snaps or slots may be damaged. Similarly, when disassembling a multi-module PLC, due to the tightness of the snap connection structure, it is necessary to pull the module forcefully to disassemble the adjacent modules, which may damage the snaps or the module itself, and may even affect other connected modules. Sometimes, it is necessary to use tools such as screwdrivers to pry open the snaps, but this process may also cause certain damage to the housing of the module.

[0004] In addition, PLC modules are generally fixed on the installation rails inside the electrical cabinet. To achieve fast installation and disassembly, a quick-release structure is generally provided. The traditional quick-release structure is based on a spring to achieve the engagement of the locking member with the rail. During disassembly, the operating ring is pried with a screwdriver to offset the elastic force of the spring and achieve the disengagement of the quick-release structure from the rail. However, this traditional structure relies on the independent operation of the spring member, which needs to be produced separately and is a small component, and the assembly work is also very delicate. In short, it increases the production cost of the product.

[0005] Moreover, when removing a damaged PLC module, it is necessary to constantly hold the quick-release structure until the PLC module is detached from the installation rail. Otherwise, once released, the spring will pull the quick-release structure back to the locked state, resulting in disassembly failure. Summary of the Utility Model

[0006] The technical problem to be solved by this utility model is to provide a quick-release structure for installing a PLC module with low cost.

[0007] The specific technical solution of the present utility model to solve the above technical problems is as follows: A housing of a PLC module includes a housing body and a cover body. The cover body is detachably arranged on one side of the opening of the housing body. One side surface of the housing body is provided with a track groove for cooperating with an installation rail in an electrical cabinet. One side of the track groove is provided with a slot. Both sides of the slot are limit groove walls. The slot communicates with the track groove. A clamping piece is arranged in the slot. The other side of the track groove is provided with a retaining piece located above the track groove. The housing body is also provided with an L-shaped bolt and a socket. The L-shaped bolt and the socket are respectively arranged on both sides of the housing body, and the positions of the L-shaped bolt and the socket are opposite to each other. A movable locking rod is arranged in the socket.

[0008] The technical solution provided by the present utility model has the following beneficial effects compared with the prior art: The present utility model respectively arranges an L-shaped bolt and a socket on opposite sides of the housing body. The L-shaped bolt is fixedly arranged on one side of the housing body, while the socket is opened on the other side of the housing body, and their positions correspond to each other. A movable locking rod is also arranged inside the socket. When two or more PLC modules need to be spliced, by inserting the L-shaped bolt of one module into the socket of another module and moving the locking rod to lock the L-shaped bolt, a firm connection between the modules can be achieved. And when disassembling, only need to move the locking rod in the reverse direction to unlock the L-shaped bolt, and then the adjacent two PLC modules can be separated. The structure is simple, and the combination, disassembly and assembly are all convenient.

[0009] Furthermore, the housing body is also provided with a socket and a plug. The socket and the plug are oppositely arranged on two opposite side surfaces of the housing body.

[0010] The beneficial effect of adopting the above is as follows: When multiple PLC modules need to be combined, the socket and the plug can realize communication / electrical connection between the PLC modules.

[0011] Furthermore, the slot is integrally arranged on the side surface of the housing body. Both limit groove walls on both sides of the slot are arranged on the housing body.

[0012] Furthermore, the slot is arranged on the side surface after the housing body and the cover body are combined. A part of the slot is located on the housing body, and a part is located on the cover body. One limit groove wall on one side of the slot is located on the housing body, and the other limit groove wall on the other side of the slot is located on the cover body.

[0013] The beneficial effect of adopting the above is as follows: Due to the different sizes of PLC modules, limit groove walls are arranged on the cover body. Especially when some PLC modules are relatively narrow, limit groove walls can only be arranged on one side. The limit groove walls arranged on the cover body directly cooperate with the limit groove walls on the housing body to jointly form a slot for accommodating the clamping piece for accommodating the clamping piece.

[0014] Further, the clamping piece includes a guiding portion, an opening / closing operation portion, an elastic engaging portion, and a limiting body; the guiding portion is used to limit the clamping piece to move only up and down within the slot; the opening / closing operation portion is used to operate the clamping piece to move up or down within the slot; a clamping block is provided in the slot, and the elastic engaging portion is used to cooperate with the clamping block in the slot so that the elastic engaging portion is constrained above or below the clamping block; the limiting body includes a first limiting portion and a second limiting portion, the first limiting portion is used to limit the extreme positions of the up-and-down movement of the clamping piece within the slot, and the second limiting portion is used to cooperate with the installation rail in the electrical cabinet to clamp the PLC module onto the installation rail in the electrical cabinet.

[0015] Adopting the above further beneficial effects: The clamping piece does not have an independent spring member, so the production and assembly are simple and the cost is low. On the other hand, two extreme positions are set, and the elastic engaging portion can be stably located at the two extreme positions, so it is not necessary to always pick the operation portion during disassembly, making it more convenient to use.

[0016] Further, the elastic engaging portion includes two legs, the ends of the legs are cylindrical, both sides of the clamping block are outwardly bent structures, and the bent structures have inflection points.

[0017] Adopting the above further beneficial effects: The inflection points on both sides of the clamping block gradually separate the originally close two legs, and an elastic restoring force towards each other will be generated between the two legs. This is due to the natural tendency of the elastic property of the leg material itself to seek to return to its original state after being deformed by an external force. When the ends of the two legs successfully move upward or downward beyond the inflection point, this elastic restoring force towards each other has a tendency to drive the clamping piece to continue moving towards the upper extreme position or the lower extreme position.

[0018] Further, the first limiting portion includes an upper limiting portion and a lower limiting portion, the upper limiting portion is used to limit the upper extreme position of the clamping piece within the slot, and the lower limiting portion is used to limit the lower extreme position of the clamping piece within the slot.

[0019] Further, the side of the second limiting portion away from the track groove is a slope surface.

[0020] Adopting the above further beneficial effects: It is convenient to automatically push the clamping piece upward from the lower extreme position during the installation process.

[0021] Further, the clamping piece is integrally formed by an injection molding process. Description of the Drawings

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the outer shell of the PLC module according to the first embodiment of the present invention;

[0023] Figure 2The front view of the housing of the PLC module according to the first embodiment of the present utility model;

[0024] Figure 3 The three-dimensional structure schematic diagram of the second perspective of the housing of the PLC module according to the first embodiment of the present utility model;

[0025] Figure 4 The structure schematic diagram of the clamping piece according to the present utility model;

[0026] Figure 5 The structure schematic diagram of the combination of multiple PLC modules according to the present utility model;

[0027] Figure 6 The state diagram when the locking rod of the present utility model is not inserted into the L-shaped pin;

[0028] Figure 7 The state diagram when the locking rod of the present utility model is inserted into the L-shaped pin;

[0029] Figure 8 The structure schematic diagram when the clamping piece of the present utility model is at the upper limit position of the slot;

[0030] Figure 9 The structure schematic diagram when the clamping piece of the present utility model is at the lower limit position of the slot;

[0031] Figure 10 The structure schematic diagram when the end of the elastic clamping part of the present utility model is at the inflection point;

[0032] Figure 11 The structure schematic diagram when the clamping piece of the present utility model is matched with the installation guide rail;

[0033] Figure 12 The three-dimensional structure schematic diagram of the housing of the PLC module according to the second embodiment of the present utility model;

[0034] In the drawings, the list of component names represented by each reference numeral is as follows:

[0035] 1. Housing; 2. Slot; 201. Limit slot wall; 3. Clamping block; 301. Inflection point; 4. Clamping piece; 5. Guide part; 6. Opening and closing operation part; 7. Elastic clamping part; 81. First limiting part; 811. Upper limiting part; 812. Lower limiting part; 82. Second limiting part; 821. Slope surface; 9. Cover body; 10. Track groove; 11. Flap; 12. L-shaped pin; 13. Jack; 14. Locking rod; 15. Plug; 16. Socket; 17. Installation guide rail. Detailed implementation manners

[0036] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0037] Embodiment 1:

[0038] As Figure 1 - Figure 11 shown, a housing of a PLC module includes a housing 1 and a cover 9. The cover 9 is detachably arranged on one side of the opening of the housing 1. A track groove 10 for cooperating with an installation rail 17 in an electrical cabinet is provided on one side surface of the housing 1. A slot 2 is provided on one side of the track groove 10. Both sides of the slot 2 are limit slot walls 201. The slot 2 communicates with the track groove 10. A clamping piece 4 is arranged in the slot 2. A retaining piece 11 located above the track groove 10 is provided on the other side of the track groove 10. The cooperation between the clamping piece 4 and the retaining piece 11 can fix the housing 1 on the installation rail 17 in the electrical cabinet. The track groove 10 penetrates through the side surfaces of the housing 1 and the cover 9. An L-shaped bolt 12 and a socket 13 are further provided on the housing 1. The L-shaped bolt 12 and the socket 13 are respectively arranged on both sides of the housing 1, and the positions of the L-shaped bolt 12 and the socket 13 are opposite. A movable locking rod 14 is arranged in the socket 13. When two or more PLC modules need to be spliced, by inserting the L-shaped bolt 12 of one module into the socket 13 of another module and moving the locking rod 14 to lock the L-shaped bolt 12, a firm connection between the modules can be achieved. And when disassembling, only need to move the locking rod 14 in the reverse direction to unlock the L-shaped bolt 12, and then the adjacent two PLC modules can be separated.

[0039] The whole slot 2 is arranged on the side surface of the housing 1, and the limit slot walls 201 on both sides of the slot 2 are both arranged on the housing 1.

[0040] An insertion port 16 and a plug 15 are further provided on the housing 1. The insertion port 16 and the plug 15 are oppositely arranged on two opposite side surfaces of the housing 1. When multiple PLC modules need to be combined, the insertion port 16 and the plug 15 can realize communication / electrical connection between the PLC modules.

[0041] The clamping piece 4 includes a guide portion 5, an opening and closing operating portion 6, an elastic clamping portion 7 and a limiter. The guide portion 5 ensures that the clamping piece 4 can only move up and down in the slot 2; the opening and closing operating portion 6 adopts a "convex" opening design to support the operation of a straight and cross screwdriver; the elastic clamping portion 7 is two V-shaped legs, the ends of the legs are cylindrical, and cooperate with the clamping block 3 in the slot 2. The two sides of the clamping block 3 are outward bending structures, and the bending structure has an inflection point 301. The clamping piece 4 can be stably located above or below the clamping block 3 without sufficient external force. However, when external force acts on the clamping piece 4 and pushes the elastic clamping portion 7 to move between the upper and lower limit positions, it will pass through the inflection point 301 of the clamping block 3. The inflection points 301 on both sides of the engaging block 3 gradually separate the two legs that were originally close to each other, and an elastic restoring force is generated between the two legs. This is due to the elastic properties of the leg material itself, which naturally tends to restore to its original state after being deformed by external force. When the ends of the two legs successfully pass the inflection point 301 upward or downward, the opposing elastic restoring forces tend to drive the engaging piece 4 to continue to move to the upper limit position or the lower limit position.

[0042] The limiting body is composed of a first limiting portion 81 and a second limiting portion 82. The first limiting portion 81 limits the upper limit position or the lower limit position of the movement of the clamping piece 4, and the latter cooperates with the mounting rail 17 in the electrical cabinet to realize the clamping of the PLC module. The first limiting portion 81 is further subdivided into an upper limit portion 811 and a lower limit portion 812. The upper limit portion 811 is used to limit the upper limit position of the clamping piece 4 in the slot 2, and the lower limit portion 812 is used to limit the lower limit position of the clamping piece 4 in the slot 2. In this embodiment, the upper limit portion 811 is a block, which is arranged at the end of the two legs and is opposite to the middle position of the two legs. The block cooperates with the engaging block 3 to limit the limit position of the upward movement of the clamping piece 4. The lower limit portion 812 is a shoulder structure arranged above the clamping piece 4. When the clamping piece 4 moves downward, the shoulder structure contacts the upper end of the limiting groove wall 201, and the clamping piece 4 moves downward to the limit position. The second limiting portion 82 includes a buckling side and a driving side. The buckling side is used to abut against the installation guide rail 17 to achieve buckling. The side of the second limit away from the track groove 10 is the driving side, and the driving side is a slope surface 821, which is convenient for automatically pushing the clamping piece 4 upward from the lower limit position during the installation process. When it is necessary to separate the mounting rail 17 from the PLC module housing 1, the mounting rail 17 and the PLC module housing 1 are squeezed toward each other. Due to the guiding effect of the slope surface 821, the card plate 4 originally located at the lower limit position is pushed upward, thereby pulling the card plate 4 out of the slot 2, thereby achieving the separation of the mounting rail 17 and the PLC module housing 1.

[0043] In addition, by adjusting the height of the overlapping part of the second limiting part 82 and the installation guide rail 17 in the electrical cabinet, it is possible to effectively prevent the clamping piece 4 from accidentally crossing the inflection points 301 on both sides of the engaging block 3 during the installation process, thereby significantly improving the installation efficiency. Specifically, referring to Figure 9 , Figure 10 and Figure 11 , the height h of the overlapping part of the second limiting part 82 and the installation guide rail 17 in the electrical cabinet is made lower than the distance H between the inflection point 301 of the engaging block 3 and the end of the elastic engaging part 7. In this configuration, when the clamping piece 4 is initially at the lower extreme limit and ready to install the PLC module, the inclined plane 821 of the second limiting part 82 first contacts and presses against the installation guide rail 17 in the electrical cabinet. As the PLC module is pushed towards the installation guide rail 17 in the electrical cabinet, the externally applied pressing force causes the clamping piece 4 to move upward, and at the same time, the elastic engaging part 7 undergoes elastic deformation due to the restriction of the engaging block 3. However, due to the design of the height of the second limiting part 82, it will completely cross the installation guide rail 17 in the electrical cabinet before the end of the elastic engaging part 7 crosses the inflection point 301 of the engaging block 3. Once the second limiting part 82 crosses the installation guide rail 17, the clamping piece 4 quickly moves downward under the action of the elastic restoring force accumulated in the elastic engaging part 7, returns to its original state, and completes the clamping installation of the PLC module during this process. This setting of the height difference ensures that the clamping piece 4 automatically resets to the lower extreme limit during the installation process, avoiding the situation where the elastic restoring force drives the clamping piece 4 to move to the upper extreme limit due to crossing the inflection point 301. In this way, the installation can be smoothly completed without additional manual operations, significantly improving the work efficiency.

[0044] The contact surface between the elastic engaging part 7 and the engaging block 3 is processed into an arc surface to reduce friction and improve the durability of the clamping piece 4.

[0045] Embodiment 2:

[0046] As Figure 12 , different from the first specific embodiment, the slot 2 is arranged on the side surface after the combination of the housing 1 and the cover body 9. A part of the slot 2 is located on the housing 1, and a part is located on the cover body 9. The limiting slot wall 201 on one side of the slot 2 is located on the housing 1, and the limiting slot wall 201 on the other side of the slot 2 is located on the cover body 9.

[0047] Due to the different sizes of the PLC modules, the limiting slot wall 201 is arranged on the cover body 9. Especially when some PLC modules are relatively narrow in width, the limiting slot wall 201 can only be arranged on one side. The limiting slot wall 201 arranged on the cover body 9 directly cooperates with the limiting slot wall 201 on the housing 1 to jointly form the slot 2 for accommodating the clamping piece 4 for accommodating the clamping piece 4.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A housing of a PLC module, characterized in that: The invention comprises a shell (1) and a cover (9), wherein the cover (9) is detachably arranged on one side of the opening of the shell (1), a track groove (10) for cooperating with a mounting guide rail (17) in an electrical cabinet is provided on one side of the shell (1), a slot (2) is provided on one side of the track groove (10), both sides of the slot (2) are limit slot walls (201), the slot (2) is connected to the track groove (10), a clamping piece (4) is provided in the slot (2), a blocking piece (11) located above the track groove (10) is provided on the other side of the track groove (10), and an L-shaped latch (12) and a plug hole (13) are further provided on the shell (1), the L-shaped latch (12) and the plug hole (13) are respectively arranged on both sides of the shell (1), and the positions of the L-shaped latch (12) and the plug hole (13) are opposite, and a movable locking rod (14) is provided in the plug hole (13).

2. The housing of the PLC module according to claim 1, characterized in that: A limiting groove wall (201) is provided on the cover body (9).

3. The housing of the PLC module according to claim 2, characterized in that: The slot (2) is arranged as a whole on the side surface of the shell (1), and the limiting groove walls (201) on both sides of the slot (2) are arranged on the shell (1).

4. The housing of the PLC module according to claim 2, characterized in that: The slot (2) is arranged on the side surface after the shell (1) and the cover body (9) are combined, a part of the slot (2) is located on the shell (1), and a part of the slot (2) is located on the cover body (9), a limiting slot wall (201) on one side of the slot (2) is located on the shell (1), and a limiting slot wall (201) on the other side of the slot (2) is located on the cover body (9).

5. The housing of the PLC module according to claim 1, characterized in that: The housing (1) is also provided with a socket (16) and a plug (15), and the socket (16) and the plug (15) are arranged on two opposite sides of the housing (1).

6. The housing of the PLC module according to claim 5, characterized in that: The clamping piece (4) comprises a guide portion (5), an opening and closing operation portion (6), an elastic clamping portion (7) and a limiting body; the guide portion (5) is used to limit the clamping piece (4) to move up and down only in the slot (2); the opening and closing operation portion (6) is used to operate the clamping piece (4) to move up or down in the slot (2); a clamping block (3) is provided in the slot (2); the elastic clamping portion (7) is used to cooperate with the clamping block (3) in the slot (2) so that the elastic clamping portion (7) is constrained on the upper side or the lower side of the clamping block (3); the limiting body comprises a first limiting portion (81) and a second limiting portion (82); the first limiting portion (81) is used to limit the limit position of the clamping piece (4) to move up and down in the slot (2); the second limiting portion (82) is used to cooperate with the mounting rail (17) in the electrical cabinet to clamp the PLC module on the mounting rail (17) in the electrical cabinet.

7. The housing of the PLC module according to claim 6, characterized in that: The elastic locking portion (7) comprises two legs, the ends of the legs are cylindrical, and the two sides of the locking block (3) are bent structures, and the bent structures have inflection points (301).

8. The housing of the PLC module according to claim 6, characterized in that: The first limiting portion (81) comprises an upper limiting portion (811) and a lower limiting portion (812); the upper limiting portion (811) is used to limit the upper limiting position of the card connecting piece (4) in the slot (2); and the lower limiting portion (812) is used to limit the lower limiting position of the card connecting piece (4) in the slot (2).

9. The housing of the PLC module according to claim 7, characterized in that: The side of the second limiting portion (82) away from the track groove (10) is a slope surface (821).

10. The housing of the PLC module according to claim 9, characterized in that: The clamping piece (4) is integrally formed by an injection molding process.

Images