Door opening device and circuit breaker chassis assembly

Abstract

The utility model relates to a kind of door opening device, including box, slot hole is set on the box and is equipped with;Partition assembly is located in upper clamping groove and lower clamping groove respectively;Roller and elastic support, the upper and lower ends of the roller respectively form pin column, two pin columns are connected with the inner partition or outer partition in upper clamping groove and lower clamping groove;A kind of circuit breaker chassis component, including pedestal, the middle position of the pedestal is set left and right two pairs of guide posts, a top rod is set in each pair of guide posts, the top rod includes small diameter rod and large diameter rod, the first guide surface on the small diameter rod and the second guide surface on the large diameter rod are equipped with guide slope;Partition assembly and two above-mentioned door opening device, the pin shaft of left door opening device is connected with outer partition, the pin shaft of right door opening device is connected with inner partition;Door opening device and the two inner and outer partitions form a completely independent module, can be flexibly installed and disassembled without affecting drawer seat structure, time-saving and efficient.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a door opening device and a circuit breaker base frame assembly. Background Technology

[0002] Currently, universal circuit breaker safety doors on the market are designed to accommodate products with bridge-type contacts installed in the circuit breaker body. Because the bridge-type contacts are wider than the previous blade contacts, this requires the door panel to open a greater distance, which traditional opening methods cannot achieve. Therefore, the market often uses safety doors that can move both left and right while also moving forward and backward. However, the movement of this type of safety door is unreliable, especially in testing positions, where jamming frequently occurs when opening and closing. The safety door fails to properly isolate the air contact between the circuit breaker body and the drawer, causing safety issues. Furthermore, this opening method uses more parts, has a complex installation structure, and is costly.

[0003] The current safety partition device opens and closes by shifting the angle and position of the guide groove of the top rod 13. Currently, the return spring only functions for forward and backward reset; left and right movement is achieved solely through the sliding between the guide groove and the partition's positioning groove. However, the addition of a bridge-type contact to the main body reduces the opening distance of the moving partition, increases the angle of the guide groove of the top rod 13, and increases the resistance during forward and backward sliding of the moving partition. This can cause jamming during forward and backward movement, and even damage to the partition due to excessive force. Furthermore, the roughness of the sliding surface on the partition and the positional offset of the guide groove of the top rod 13 all affect the stability of the movement, the smoothness of the opening and closing action, and the reliability of the safety door in different positions, resulting in unreliable left and right opening actions.

[0004] Meanwhile, replacing the existing drawer seat safety divider requires disassembling the entire drawer seat, a process that causes damage to parts and consumes a lot of manpower and time, making it uneconomical. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a door opening device and a circuit breaker base frame assembly, so as to solve the technical problems of the partition assembly in the existing circuit breaker base frame assembly having unsmooth and unreliable opening and closing action and inconvenient disassembly and assembly.

[0006] The technical solution adopted by this utility model to solve its technical problem is: On the one hand, a door opening device is provided, including The box body has a through slot at the front and back and guide parts at both ends. The guide parts cooperate with the bottom plate to guide the box body to move back and forth relative to the base. The box body is provided with an upper clamping groove and a lower clamping groove at its upper and lower ends, respectively. The box body is installed in the guide groove of the partition assembly and can guide the partition assembly to move left and right. The partition assembly is located in the upper clamping groove and the lower clamping groove, respectively. The roller and the elastic support are arranged in the box and abut against the roller. The roller is arranged in the slot and is adapted to make elastic left and right translation within the slot. The upper and lower ends of the roller are respectively formed as pins, and the two pins extend into the upper clamping groove and the lower clamping groove respectively and are engaged with the inner or outer partition in the upper clamping groove and the lower clamping groove. When the roller engages with the push rod inserted into the slot, the push rod drives the roller to move horizontally within the slot, thereby causing the inner or outer partition to move horizontally, opening the through hole on the partition assembly; when the push rod exits the slot, the roller moves horizontally back to its original position under the action of the elastic support, thereby causing the inner or outer partition to move horizontally back to its original position, closing the through hole on the partition assembly.

[0007] Furthermore, the elastic support includes left and right springs and a support base. The left and right springs are disposed inside the box, and the support base is slidably disposed in the slot. One end of the support base abuts against the left and right springs, and the other end abuts against the roller.

[0008] Furthermore, the box body includes a front cover and a rear cover, which are fastened together by bolts.

[0009] Furthermore, the support base is provided with an inner arc surface, which abuts against the roller.

[0010] Furthermore, the box body is a cross-shaped structure, the slot is opened in the middle of the box body, and the guide part is a guide hole opened at the left and right ends of the box body.

[0011] Furthermore, the box body is T-shaped, the slot is opened on one side of the box body, and the guide part is a guide head formed at the upper and lower ends of the box body.

[0012] On the other hand, a circuit breaker base assembly is provided, including... A base, wherein two pairs of guide pillars are provided in the middle of the base, and a top rod is provided in the middle of each pair of guide pillars. The top rod includes a small diameter rod and a large diameter rod, and a guide slope is provided between the first guide surface on the small diameter rod and the second guide surface on the large diameter rod. A partition assembly includes an inner partition and an outer partition, both of which have multiple through holes for contacts to pass through and two guide grooves for mounting a door opening device; the guide grooves are elongated elliptical grooves. The two opening devices mentioned above are respectively installed in two guide grooves. The guide post passes through the guide hole of the box body and is provided with a limiting sleeve at the end. The guide post is provided with front and rear springs, and the front and rear springs abut against the box body in front. The pin of the left door opening device is engaged with the outer partition, and the pin of the right door opening device is engaged with the inner partition. When the partition assembly is pressed and moves backward, the front end of the push rod gradually extends out of the slot. The rollers in the slot sequentially contact the first guide surface, the guide ramp, and the second guide surface on the push rod. The left and right rollers drive the two partitions to move alternately, thereby opening the through hole on the partition assembly. When the partition assembly returns to its original position under the action of the front and rear springs, the rollers sequentially contact the second guide surface, the guide ramp, and the first guide surface. The left and right rollers drive the two partitions to move alternately, thereby closing the through hole on the partition assembly.

[0013] On the other hand, a circuit breaker base assembly is provided, including... A base, on the left and right sides of the base respectively, is provided with a pair of guide seats, the two guide seats are distributed vertically, the guide seats are provided with guide grooves, and a top rod is provided between each pair of guide seats. The top rod includes a small diameter rod and a large diameter rod, and a guide slope is provided between the first guide surface on the small diameter rod and the second guide surface on the large diameter rod. A partition assembly includes an inner partition and an outer partition. Both the inner and outer partitions have multiple through holes for contacts to pass through and two guide grooves for mounting a door opening device. The guide grooves are T-shaped grooves formed at the edges of the partitions. Two of the above-mentioned door opening devices are provided, with the guide heads of the two door opening devices respectively inserted into the guide grooves. A limiting sleeve is provided at the front end of the guide seat, and front and rear springs are provided in the guide grooves. The front and rear springs abut against the guide heads forward. The pin of the left door opening device is engaged with the outer partition, and the pin of the right door opening device is engaged with the inner partition. When the partition assembly is pressed and moves backward, the front ends of the two push rods on the left and right gradually extend out of the slot. The rollers in the slot contact the first guide surface, the guide ramp, and the second guide surface on the push rod in sequence, thereby causing the outer partition and the inner partition to move alternately and thus open the through hole on the partition assembly. When the partition assembly returns to its original position under the action of the front and rear springs, the rollers contact the second guide surface, the guide ramp, and the first guide surface in sequence, thereby causing the outer partition and the inner partition to move alternately and return to their original position, thus closing the through hole on the partition assembly.

[0014] The beneficial effects of this utility model are: When the circuit breaker body abuts against the door opening device, causing the partition assembly to move backward synchronously, the push rod on the base pushes the roller inside the box to move left and right during insertion, thereby pushing the partition to move left and right. This creates a through hole in the partition assembly, allowing the drawer seat insert mounted at the bottom of the base to smoothly pass through the door of the safety partition. This satisfies the functional requirements of a circuit breaker with the bridge contact fixed to the body while ensuring reliable connection of the circuit breaker.

[0015] The newly designed door opening mechanism incorporates rollers, which roll against the guide ramp on the top rod, replacing the original sliding contact between the guide groove and the partition positioning groove, thus reducing the coefficient of friction. The sliding friction between the original guide groove and the partition is optimized to rolling friction between the roller inside the box and the guide boss on the base frame. A pressure spring at the roller ensures a tight fit between the roller and the guide ramp, making its movement more stable and reliable.

[0016] The door opening device controls the opening and closing of the partition assembly. Through the slope of the guide ramp on the top rod, it rolls with the rollers inside the door opening device box, effectively reducing the resistance generated during the movement, effectively solving the accuracy of the partition assembly's movement at three key positions, and solving the problem of electrical safety at the test position.

[0017] The newly designed door opening mechanism and the direct partition assembly of the inner and outer partitions form a completely independent module, which is completely different from the past method of installing the movable partition on the base. Therefore, it can be flexibly installed and disassembled without affecting the drawer base structure, saving time and increasing efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural diagram of the opening and closing of a traditional safety partition device; Figure 2 This is a schematic diagram of the door opening device in Embodiment 1; Figure 3 This is a schematic diagram of the door opening device (without the front cover) in Embodiment 1; Figure 4 This is a schematic diagram of the circuit breaker base frame assembly in Embodiment 2; Figure 5 yes Figure 4 Sectional view along line AA; Figure 6 This is a schematic diagram of the base of the circuit breaker frame assembly in Embodiment 2; schematic diagram; Figure 7 This is a schematic diagram of the outer partition; Figure 8 This is a schematic diagram of the inner partition; Figure 9 This is a schematic diagram of a drawer-type circuit breaker; Figure 10 This is a schematic diagram of the door opening device in Embodiment 3; Figure 11 This is a schematic diagram of the door opening device (without the front cover) in Embodiment 3; Figure 12 This is a schematic diagram of the circuit breaker base frame assembly in Embodiment 4; Figure 13 yes Figure 12Sectional view along the BB direction; Figure 14 This is a schematic diagram of the base of the circuit breaker frame assembly in Embodiment 4; Figure 15 This is a schematic diagram of the partition assembly of the circuit breaker base frame assembly in Embodiment 4; Among them, 1. base, 11. guide post, 12. guide seat, 13. top rod, 131. first guide surface, 132. second guide surface, 133. guide slope, 14. limiting sleeve, 15. front and rear springs; 2. Partition assembly; 21. Outer partition; 22. Inner partition; 23. Through hole; 24. Guide groove; 25. Slot; 3. Door opening device; 31. Front cover; 32. Rear cover; 33. Support base; 34. Left and right springs; 35. Guide hole; 36. Guide head; 37. Slot; 4. Rollers; 41. Pins; 5. Drawer bracket; 51. Travel top block; 6. Circuit breaker body. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Example 1 like Figure 2 and Figure 3 As shown, a door opening device includes... The box body has a through slot 37 on the front and back and guide parts at both ends. The guide parts cooperate with the bottom plate to guide the box body to move back and forth relative to the base 1. The box body is provided with an upper clamping groove and a lower clamping groove at its upper and lower ends, respectively. The box body is installed in the guide groove 24 of the partition assembly 2 and can guide the partition assembly 2 to move left and right. The partition assembly 2 is located in the upper clamping groove and the lower clamping groove, respectively. The roller 4 and the elastic support are provided. The elastic support is disposed in the box and abuts against the roller 4. The roller 4 is disposed in the slot 37 and is adapted to make elastic left and right translation within the slot 37. The upper and lower ends of the roller 4 are respectively formed as pins 41. The two pins 41 extend into the upper clamping groove and the lower clamping groove respectively and are engaged with the inner partition 22 or the outer partition 21 in the upper clamping groove and the lower clamping groove. When the roller 4 engages with the push rod 13 inserted into the slot 37, the push rod 13 drives the roller 4 to translate within the slot 37, thereby causing the inner partition 22 or the outer partition 21 to translate, thus opening the through hole 23 on the partition assembly 2; when the push rod 13 exits the slot 37, the roller 4 performs a reset translation under the action of the elastic support, thereby causing the inner partition 22 or the outer partition 21 to perform a reset translation, and closing the through hole 23 on the partition assembly 2.

[0022] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, the box body is a cross-shaped structure, the slot 37 is opened in the middle of the box body, and the guide part is a guide hole opened at the left and right ends of the box body.

[0023] A guide post 11 is provided on the base 1 to cooperate with it. The guide hole and the guide post 11 are slidably engaged, thereby guiding the box to move back and forth relative to the base 1.

[0024] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, the elastic support includes left and right springs 34 and a support base 33. The left and right springs 34 are disposed in the box body, and the support base 33 is slidably disposed in the slot 37. One end of the support base 33 abuts against the left and right springs 34, and the other end abuts against the roller 4.

[0025] In this embodiment, as Figure 2 and Figure 3 As shown, the slot 37 is a rectangular square hole. The upper and lower ends of the roller 4 are in sliding fit with the box body. Slide grooves are opened at both the upper and lower ends of the slot 37. The upper and lower ends of the roller 4 are inserted into the slide grooves and move left and right in the slot 37 through the slide grooves.

[0026] When the roller 4 is stationary in the slot 37, there is a gap between the front end of the roller 4 and the slot 37. This gap is inserted from the small diameter rod at the front end of the push rod 13. The roller 4 will only move in the slot 37 when it comes into contact with the guide slope 133 of the push rod 13 and the second guide surface 132 on the large diameter rod.

[0027] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, the box body includes a front cover 31 and a rear cover 32, which are fastened together by bolts.

[0028] Both the front cover 31 and the rear cover 32 are two injection molded parts. The front cover 31 and the rear cover 32 are also cross-shaped structures. Several ribs are provided inside the front cover 31 and the rear cover 32 to enhance the strength of the cover and prevent it from deforming. The cover body has an installation space for left and right springs 34, and a moving space for support seats 33 and rollers 4.

[0029] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, the support base 33 has an inner arc surface that abuts against the roller 4. By abutting against the roller 4 with the inner arc surface, the roller 4 can be stably supported, preventing the roller 4 from shaking and getting stuck during left and right translation.

[0030] like Figure 3 As shown, the roller 4 includes a large-diameter column in the middle and small-diameter columns at both ends. The large-diameter column contacts the inner arc surface of the support seat 33, and the small-diameter column is the pin 41. The small-diameter column passes through the box and extends into the upper and lower clamping grooves.

[0031] In this embodiment, the door opening device is installed in the guide grooves 24 of the inner and outer partitions through the box body. At the same time, the inner and outer partitions are also clamped in the upper clamping groove and the lower clamping groove. Therefore, the door opening device 3 can be pre-assembled with the partition assembly 2 and then installed on the base frame assembly together with the partition assembly 2.

[0032] One door opening device 3 can only engage with the inner partition via roller 4. In order for the partition assembly 2 to open and close stably, the door opening devices 3 need to be used in pairs. The roller 4 of one door opening device 3 engages with the outer partition 21 to control the movement of the outer partition 21. After the other door opening device 3 is flipped, the roller 4 engages with the inner partition 22 to control the movement of the inner partition 22.

[0033] The working principle of the door opening device 3 in this embodiment is as follows: the roller 4 moves left and right elastically inside the box. When the top rod 13 is inserted, the guide inclined surface 133 on the top rod 13 drives the roller 4 to move left and right. Since the roller 4 is engaged with the partition, the partition moves left and right.

[0034] Example 2 like Figures 4 to 8 As shown, a circuit breaker base assembly includes... Base 1, with two pairs of guide pillars 11 arranged in the middle of the base 1, and a top rod 13 arranged in the middle of each pair of guide pillars 11. The top rod 13 includes a small diameter rod and a large diameter rod. A guide slope 133 is provided between the first guide surface 131 on the small diameter rod and the second guide surface 132 on the large diameter rod. The partition assembly 2 includes an inner partition 22 and an outer partition 21, which overlap each other. Both the inner partition 22 and the outer partition 21 have multiple through holes 23 for contacts to pass through and two guide grooves 24 for mounting a door opening device 3. The guide grooves 24 are elliptical grooves. The two door opening devices 3 in the first embodiment are respectively installed in two guide grooves 24. The guide post 11 passes through the guide hole 35 of the box body and is provided with a limiting sleeve 14 at the end. The guide post 11 is provided with front and rear springs 15, and the front and rear springs 15 abut against the box body in front. The pin of the left door opening device 3 is engaged with the outer partition 21, and the pin of the right door opening device 3 is engaged with the inner partition 22. like Figure 7 and Figure 8 As shown, rectangular slots 25 are provided at both the upper and lower ends of the guide grooves 24 of the outer partition 21 and the inner partition 22. These slots 25 are used for inserting the pin 41.

[0035] In this embodiment, the base 1 is an injection molded part, and the guide post 11 and the push rod 13 on the base 1 are integrally injection molded.

[0036] like Figure 9 The drawer-type circuit breaker shown has a base frame assembly that is a component on the circuit breaker drawer 5. The circuit breaker body 6 is installed on the drawer 5. The circuit breaker body 6 moves back and forth, and the bridge-type contacts on the circuit breaker body 6 are inserted into the blades on the base 1.

[0037] like Figure 9 As shown, after the base frame assembly is installed on the drawer 5, a travel block 51 is installed on the door opening device 3. The travel block 51 is used to contact the circuit breaker body 6. When the circuit breaker body 6 moves backward, the circuit breaker body 6 first contacts the travel block 51, and the travel block 51 drives the door opening device 3 and the partition assembly 2 to move backward together. The two door opening devices 3 move backward along the guide post 11, and the push rod 13 extends forward from the slot 37. The push rod 13 first passes through the first guide surface 13 of the small diameter rod. 1. The roller 4 is in contact with the guide slope 133. When the guide slope 133 contacts the roller 4, it starts to drive the roller 4 to move left and right, controlling the opening of the through hole 23 of the partition assembly 2. When the second guide surface 132 of the large diameter rod contacts the roller 4, it means that the through hole 23 of the partition assembly 2 has been opened. At this time, as the circuit breaker body 6 continues to follow, the insert knife on the base 1 extends out from the through hole 23 of the partition assembly 2 and is inserted and engaged with the bridge-type contact in the circuit breaker body 6, and the circuit breaker is energized.

[0038] As the circuit breaker body 6 moves forward, the partition assembly 2 is reset forward under the action of the front and rear springs 15. The roller 4 passes through the second guide surface 132 and the guide slope 133 in sequence and returns to the first guide surface 131. The roller 4 is reset under the action of the left and right springs 34, and the through hole 23 of the partition assembly 2 is closed.

[0039] The circuit breaker has three key positions: the disconnected position, the test position, and the connected position. When the small-diameter rod of the push rod 13 is in the slot 37, the first guide surface 131 contacts the roller 4, which is the disconnected and test positions, and the through hole 23 of the partition assembly 2 is closed. When the roller 4 contacts the guide inclined surface 133, the through hole 23 of the partition assembly 2 opens. When the roller 4 contacts the second guide surface 132 of the large-diameter rod, the circuit breaker is in the connected position.

[0040] In this embodiment, the two door opening devices 3 in the middle of the circuit breaker base frame assembly are distributed left and right, and the guide slopes 133 of the two top rods 13 face opposite directions. The two partitions of the partition assembly 2 are installed with the door opening devices 3 through the elliptical long slots 37, and the door opening devices 3 can move back and forth elastically on the base 1.

[0041] In this embodiment, the limiting sleeve 14 is fixed to the front end of the guide post 11 by screws, and the travel top block 51 is sleeved on the top rod 13. The limiting sleeve 14 restricts the door opening device 3 and also restricts the travel top block 51.

[0042] Depending on actual needs, the circuit breaker base frame assembly can also be equipped with only one door opening device 3. One door opening device 3 drives one of the partitions to move, which can also realize the opening and closing of the control through hole 23.

[0043] In this embodiment, the tilt angle of the guide slope 133 on the top rod 13 is adjusted according to the actual stroke. The smaller the tilt angle corresponds to a longer stroke, and the larger the tilt angle corresponds to a shorter stroke.

[0044] In this embodiment, the partition assembly 2 and the two door opening devices 3 can be made into an independent module, which is completely different from the past method of installing the movable partition on the base 1. Therefore, it can be flexibly installed and disassembled without affecting the drawer seat structure, saving time and being efficient.

[0045] Example 3 like Figure 10 and Figure 11 As shown, this embodiment is based on embodiment one, with the difference being that: the box body is a T-shaped structure, the slot 37 is opened on one side of the box body, and the guide part is a guide head 36 formed at the upper and lower ends of the box body.

[0046] Compared to the cross-shaped box, the T-shaped box has the advantage of making the partition move more stably from side to side. In the first embodiment, the partition has an elliptical groove that matches the box. The partition only provides guidance in the left and right directions, which does not provide high stability for the partition when installed in the base 1.

[0047] In this embodiment, the T-shaped box body and the partition plate are fitted with T-shaped grooves, so that the box body can provide lateral and vertical guidance and restraint for the partition plate, and the partition plate assembly 2 has higher stability in the base 1.

[0048] The T-shaped box does not require guide holes 35 on the box body; it can be guided directly by the guide heads 36 at the top and bottom ends.

[0049] Example 4 like Figures 12 to 15 As shown, a circuit breaker base assembly includes... A base 1, with a pair of guide seats 12 respectively on the left and right sides of the base 1, the two guide seats being distributed vertically, a guide groove being opened in the guide seat 12, and a top rod 13 being provided between each pair of guide seats 12, the top rod 13 including a small diameter rod and a large diameter rod, and a guide inclined surface 133 being provided between the first guide surface 131 on the small diameter rod and the second guide surface 132 on the large diameter rod; like Figure 15 As shown, the partition assembly 2 includes an inner partition 22 and an outer partition 21. Both the inner partition 22 and the outer partition 21 have multiple through holes 23 for contacts to pass through and two guide grooves 24 for mounting the door opening device 3. The guide grooves 24 are T-shaped grooves formed at the edges of the partition. In the two door opening devices 3 of Embodiment 3, the guide heads 36 of the two door opening devices 3 are respectively inserted into the guide grooves. The front end of the guide seat 12 is provided with a limiting sleeve 14. The front and rear springs 15 are provided in the guide grooves, and the front and rear springs 15 abut against the guide head 36. The pin of the left door opening device 3 is engaged with the outer partition 21, and the pin of the right door opening device 3 is engaged with the inner partition 22. When the partition assembly 2 is pressed and moves backward, the front ends of the two push rods 13 on the left and right gradually extend out of the slot 37. The rollers 4 in the slot 37 contact the first guide surface 131, the guide slope 133 and the second guide surface 132 on the push rods 13 in sequence, thereby causing the outer partition 21 and the inner partition 22 to move alternately and thus open the through hole 23 on the partition assembly 2. When the partition assembly 2 returns to its original position under the action of the front and rear springs 15, the rollers 4 contact the second guide surface 132, the guide slope 133 and the first guide surface 131 in sequence, thereby causing the outer partition 21 and the inner partition 22 to move alternately and return to their original position, thus closing the through hole 23 on the partition assembly 2.

[0050] In this embodiment, the rear end of the travel top block 51 is also inserted into the guide groove, and then moves together with the box body.

[0051] In this embodiment, the limiting sleeve 14 is locked to the front end of the guide seat 12 by screws.

[0052] Compared with the circuit breaker base assembly in Embodiment 2, the guide mechanism of the circuit breaker base assembly in this embodiment has been changed. In this embodiment, the guide post 11 is no longer placed in the middle position because the support strength of the guide post 11 for the partition assembly 2 is limited in the middle position and it is easy to break. Now the guide mechanism is placed on both sides of the base 1, and the guide post 11 is changed to a structure with guide grooves in the guide seat 12. The strength of the guide mechanism is greatly improved, ensuring that the partition assembly 2 can move stably.

[0053] In this embodiment, the two door opening devices 3 are distributed at the left and right ends, and the partition of the partition assembly 2 moves left and right. According to actual needs, the user can also set the door opening devices 3 at the upper and lower ends of the base 1, and then the two partitions of the partition assembly 2 move up and down.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A door opening device, characterized in that, include The box body has a through slot at the front and back and guide parts at both ends. The guide parts cooperate with the bottom plate to guide the box body to move back and forth relative to the base. The box body is provided with an upper clamping groove and a lower clamping groove at its upper and lower ends, respectively. The box body is installed in the guide groove of the partition assembly and can guide the partition assembly to move left and right. The partition assembly is located in the upper clamping groove and the lower clamping groove, respectively. The roller and the elastic support are arranged in the box and abut against the roller. The roller is arranged in the slot and is adapted to make elastic left and right translation within the slot. The upper and lower ends of the roller are respectively formed as pins, and the two pins extend into the upper clamping groove and the lower clamping groove respectively and are engaged with the inner or outer partition in the upper clamping groove and the lower clamping groove. When the roller engages with the push rod inserted into the slot, the push rod drives the roller to move horizontally in the slot, thereby driving the inner or outer partition to move horizontally, thus opening the through hole on the partition assembly; When the push rod exits the slot, the roller moves back to its original position under the action of the elastic support, thereby driving the inner or outer partition to move back to its original position, and the through hole on the partition assembly closes.

2. The door opening device according to claim 1, characterized in that, The elastic support includes left and right springs and a support base. The left and right springs are disposed inside the box, and the support base is slidably disposed in the slot. One end of the support base abuts against the left and right springs, and the other end abuts against the roller.

3. The door opening device according to claim 1, characterized in that, The box body includes a front cover and a rear cover, which are fastened together by bolts.

4. The door opening device according to claim 2, characterized in that, The support base has an inner arc surface that abuts against the roller.

5. The door opening device according to any one of claims 1-4, characterized in that, The box body is a cross-shaped structure, the slot is opened in the middle of the box body, and the guide part is a guide hole opened at the left and right ends of the box body.

6. The door opening device according to any one of claims 1-4, characterized in that, The box body is T-shaped, the slot is opened on one side of the box body, and the guide is a guide head formed at the top and bottom ends of the box body.

7. A circuit breaker base assembly, characterized in that, include A base, wherein two pairs of guide pillars are provided in the middle of the base, and a top rod is provided in the middle of each pair of guide pillars. The top rod includes a small diameter rod and a large diameter rod, and a guide slope is provided between the first guide surface on the small diameter rod and the second guide surface on the large diameter rod. A partition assembly includes an inner partition and an outer partition, both of which have multiple through holes for contacts to pass through and two guide grooves for mounting a door opening device; the guide grooves are elongated elliptical grooves. The two door opening devices according to claim 5 are respectively installed in two guide grooves. The guide post passes through the guide hole of the box body and is provided with a limiting sleeve at the end. The guide post is provided with front and rear springs, and the front and rear springs abut against the box body in front. The pin of the left door opening device is engaged with the outer partition, and the pin of the right door opening device is engaged with the inner partition. When the partition assembly is pressed and moves backward, the front end of the push rod gradually extends out of the slot. The rollers in the slot sequentially contact the first guide surface, the guide ramp, and the second guide surface on the push rod. The left and right rollers drive the two partitions to move alternately, thereby opening the through hole on the partition assembly. When the partition assembly returns to its original position under the action of the front and rear springs, the rollers sequentially contact the second guide surface, the guide ramp, and the first guide surface. The left and right rollers drive the two partitions to move alternately, thereby closing the through hole on the partition assembly.

8. A circuit breaker base assembly, characterized in that, include A base, on the left and right sides of the base respectively, is provided with a pair of guide seats, the two guide seats are distributed vertically, the guide seats are provided with guide grooves, and a top rod is provided between each pair of guide seats. The top rod includes a small diameter rod and a large diameter rod, and a guide slope is provided between the first guide surface on the small diameter rod and the second guide surface on the large diameter rod. A partition assembly includes an inner partition and an outer partition. Both the inner and outer partitions have multiple through holes for contacts to pass through and two guide grooves for mounting a door opening device. The guide grooves are T-shaped grooves formed at the edges of the partitions. The two door opening devices according to claim 6, wherein the guide heads of the two door opening devices are respectively inserted into the guide groove, the front end of the guide seat is provided with a limiting sleeve, and the guide groove is provided with front and rear springs, the front and rear springs abutting the guide head forward; The pin of the left door opening device is engaged with the outer partition, and the pin of the right door opening device is engaged with the inner partition. When the partition assembly is pressed and moves backward, the front ends of the two push rods on the left and right gradually extend out of the slot. The rollers in the slot contact the first guide surface, the guide ramp, and the second guide surface on the push rod in sequence, thereby causing the outer partition and the inner partition to move alternately and thus open the through hole on the partition assembly. When the partition assembly returns to its original position under the action of the front and rear springs, the rollers contact the second guide surface, the guide ramp, and the first guide surface in sequence, thereby causing the outer partition and the inner partition to move alternately and return to their original position, thus closing the through hole on the partition assembly.

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