A base and corner frame butt joint tool for power distribution box processing

Abstract

The present application relates to the technical fields of power distribution box processing, and discloses a base and corner frame butt joint tool for power distribution box processing, which comprises a base, the base is fixedly connected with a support plate through a guide frame arranged on the top of the base, the guide frame is provided with two guide frames which are symmetrically distributed along the center surface of the base, the outer surface of the guide frame is equipped with a limiting piece for restraining the corner frame, the top of the support plate is equipped with a drive unit for driving the limiting piece to ascend and descend along the central axis of the guide frame, the base is provided with a restraining piece for limiting the base, and the restraining piece comprises a guide hole arranged on the top of the base. The base and corner frame butt joint tool for power distribution box processing can effectively solve the problem that in the prior art, the butt joint positioning of the base and the corner frame is generally adjusted by visual observation, the positioning accuracy is seriously dependent on the professional experience and visual judgment ability of the operator, and multiple adjustments and calibrations are required, resulting in low butt joint operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of distribution box processing technology, and specifically to a tooling for connecting a base and a corner frame in distribution box processing. Background Technology

[0002] As a key load-bearing and protective component of electrical equipment, the structural integrity and assembly precision of the distribution box directly affect the operational stability and safety of the electrical system. The base and corner frame are the core components of the distribution box, and the connection quality between the two is an important factor in determining the overall structural strength of the distribution box. In actual processing, welding is usually used to achieve a fixed connection between the base and the corner frame.

[0003] In the existing technology, the corner frame often adopts an L-shaped cross-section structure. The welding operation between the base and the corner frame requires precise alignment of the two as a prerequisite. Even if the welding surface of the corner frame and the preset joint surface of the base are precisely aligned, if the alignment accuracy is insufficient, it is easy to cause assembly defects such as displacement and misalignment of the welded components. This not only hinders the smooth implementation of subsequent assembly processes of the distribution box, but also weakens its overall load-bearing capacity and protection performance.

[0004] Currently, the mainstream method in the industry for docking and positioning the base and corner frame is manual positioning. The specific process is as follows: the operator manually moves the base and corner frame to the preset work position, adjusts the relative posture of the two by visual observation, and after the alignment is deemed qualified, the components are fixed by temporary limiting methods such as simple tooling clamping, and then welding is carried out. However, the positioning accuracy of the above positioning method depends heavily on the professional experience and visual judgment ability of the operator, and multiple adjustments and calibrations are required, resulting in low docking efficiency. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a fixture for docking a base and corner frame in the processing of distribution boxes. This fixture effectively solves the problem that in existing technologies, the docking and positioning of the base and corner frame is generally achieved by visually observing and adjusting their relative postures. The positioning accuracy heavily relies on the operator's professional experience and visual judgment ability, requiring multiple adjustments and calibrations, resulting in low docking efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a fixture for mating a base and a corner frame in the fabrication of a distribution box, comprising: The base is fixedly connected to a support plate by a guide frame set on its top. There are two guide frames that are symmetrically distributed along the center plane of the base. The outer circumferential surface of the guide frame is equipped with a limiting member for constraining the corner frame. The top of the support plate is equipped with a drive unit for driving the limiting member to move up and down along the central axis of the guide frame. The base is provided with a constraint member for limiting the base. The constraint member includes a guide hole opened on the top of the base. There are four guide holes and they are arranged in a circular array along the center line of the base. A constraint block that fits against the outside of the base is slidably connected in the guide hole. The base has a switching mechanism at its bottom for adjusting the position of the constraint block.

[0007] Furthermore, a flexible rubber pad is fitted on the side of the constraint block near the base. The constraint block is connected to the inner wall of the guide hole through a reset spring located on its outer side. A contact block is fixedly connected to the bottom of the constraint block, and the contact block has an arc-shaped design on the side near the reset spring.

[0008] Furthermore, the switching mechanism includes a rotating plate rotatably connected to the bottom of the base, and a wedge block that fits against the arc surface of the contact block is fixedly connected to the outer side of the rotating plate.

[0009] Furthermore, the base is fixedly connected to a drive unit that is connected to the rotary plate via a mounting bracket located at its bottom.

[0010] Furthermore, the limiting component includes a movable frame with a sliding connecting seat on the outside of the guide frame, and a corner block that fits against the outside of the corner frame is fixedly connected inside the movable frame. The corner block is provided in four parts and is distributed in a circular array along the center line of the movable frame.

[0011] Furthermore, a guide rod assembly is fixedly connected to the inner side of the movable frame, and the number of the guide rod assemblies corresponds one-to-one with the number of corner blocks. A limiting block that fits against the inner side of the corner frame is slidably connected to the outer circumference of the guide rod assembly, and a compression spring is sleeved on the outer circumference of the guide rod assembly.

[0012] Furthermore, an abutment rod is fixedly connected inside the limiting block, and the central axis of the abutment rod coincides with the diagonal of the base. A mounting base is fixedly connected to the side of the abutment rod away from the limiting block, and a ball is fitted inside the mounting base.

[0013] Furthermore, an abutment plate is fixedly connected to the bottom of the support plate, and the abutment plate has an integrally formed initial section and a constraint section on the side near the rolling ball.

[0014] The technical solution provided by this invention has the following advantages compared with the prior art: This invention includes constraint components and limiting components. Four constraint blocks are arranged in a circular array along the center line of the base. A switching mechanism (rotating plate + wedge block) drives the constraint blocks to synchronously contract or expand, uniformly clamping the base from all sides to ensure the center of the base coincides with the base reference. Simultaneously, the four corner blocks and limiting blocks correspondingly enclose corner frames. The central axis of the abutment rod coincides with the diagonal of the base. When the movable frame descends, the abutment rod slides along the constraint section of the abutment plate, causing the limiting blocks to press against the corner frames from the inside. This, combined with the outer corner blocks, achieves "bidirectional positioning," forcing the corner frames to precisely align with the end face of the base. Furthermore, the limiting blocks adopt an L-shaped structure to fit the inner side of the corner frames, and the corner blocks adopt an L-shaped structure to fit the outer side of the corner frames, forming a "surface fit." When the movable frame descends, the abutment rod slides from the initial section of the abutment plate (without lateral constraints) to the constraint section (widened + transition slope guide). Under the combined action of the lateral thrust of the constraint section and the restoring force of the compression spring, the limit block forces the corner frame to correct its tilt and offset posture until the inner and outer sides of the corner frame are completely in contact with the corner block and the limit block respectively. At the same time, the four constraint blocks clamp the base evenly from all sides each time. When the movable frame descends, the abutment rod slides along the constraint section of the abutment plate, driving the limit block to squeeze the corner frame from the inside to complete the corner frame's limitation. The positioning parameters of the base and the corner frame during constraint (such as the opening and closing stroke of the constraint block and the correction stroke of the limit block) are fixed to ensure that the positioning reference of all workpieces is consistent during mass production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the base according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the three-dimensional separation structure of the constraint member according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the support plate according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the three-dimensional separation structure of the limiting member in an embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional separation structure of the limiting block and the abutment rod in an embodiment of the present invention; Figure 7 This is a schematic diagram of the planar structure of the abutment plate according to an embodiment of the present invention.

[0017] The labels in the diagram represent: 1. Base; 2. Guide frame; 3. Support plate; 31. Abutment plate; 311. Initial section; 312. Constraint section; 4. Limiting component; 41. Movable frame; 42. Corner block; 43. Guide rod assembly; 44. Limiting block; 441. Abutment rod; 442. Mounting seat; 443. Ball bearing; 45. Compression spring; 5. Constraining component; 51. Guide hole; 52. Constraint block; 53. Switching mechanism; 531. Rotary plate; 532. Wedge block; 533. Mounting frame; 534. Driving component; 54. Flexible rubber pad; 55. Return spring; 56. Contact block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example:

[0021] Please see Figures 1-7 This invention provides a technical solution: a fixture for connecting a base and a corner frame in the processing of a distribution box, comprising: The base 1 is fixedly connected to the support plate 3 by the guide frame 2 set on its top. There are two guide frames 2 and they are symmetrically distributed along the center plane of the base 1. The outer circumferential surface of the guide frame 2 is equipped with a limiting member 4 for constraining the corner frame. The top of the support plate 3 is equipped with a drive unit for driving the limiting member 4 to move up and down along the central axis of the guide frame 2. The base 1 is provided with a constraint member 5 for limiting the base. The constraint member 5 includes a guide hole 51 opened on the top of the base 1. There are four guide holes 51 and they are arranged in a circular array along the center line of the base 1. A constraint block 52 that fits against the outside of the base is slidably connected in the guide hole 51. The bottom of the base 1 is provided with a switching mechanism 53 for adjusting the position of the constraint block 52.

[0022] A flexible rubber pad 54 is fitted on the side of the constraint block 52 near the base. The constraint block 52 is connected to the inner wall of the guide hole 51 through a reset spring 55 located on its outer side. A contact block 56 is fixedly connected to the bottom of the constraint block 52, and the contact block 56 is arc-shaped on the side near the reset spring 55.

[0023] The switching mechanism 53 includes a rotating plate 531 rotatably connected to the bottom of the base 1, and a wedge 532 that fits against the arc surface of the contact block 56 is fixedly connected to the outer side of the rotating plate 531.

[0024] The base 1 is fixedly connected to a drive unit 534 that is connected to the rotary plate 531 via a mounting bracket 533 located at its bottom.

[0025] The limiting component 4 includes a movable frame 41 with a sliding connecting seat on the outside of the guide frame 2. A corner block 42 that fits against the outside of the corner frame is fixedly connected inside the movable frame 41. There are four corner blocks 42 and they are arranged in a circular array along the center line of the movable frame 41.

[0026] The inner side of the movable frame 41 is fixedly connected to a guide rod assembly 43, and the number of guide rod assemblies 43 corresponds one-to-one with the number of corner blocks 42. The outer circumferential surface of the guide rod assembly 43 is slidably connected to a limiting block 44 that fits against the inner side of the corner frame, and a compression spring 45 is sleeved on the outer circumferential surface of the guide rod assembly 43.

[0027] The limiting block 44 is internally fixedly connected to an abutment rod 441, and the central axis of the abutment rod 441 coincides with the diagonal of the base. The abutment rod 441 is fixedly connected to a mounting base 442 on the side away from the limiting block 44, and a ball 443 is fitted inside the mounting base 442.

[0028] The bottom of the support plate 3 is fixedly connected to the abutment plate 31. The abutment plate 31 has an integrally formed initial section 311 and a constraint section 312 on the side near the rolling ball 443.

[0029] Working principle and advantages of the fixture for connecting the base and corner frame of the distribution box: In the manufacturing process of distribution boxes, the base and corner frames are the core load-bearing components, and the connection accuracy between them directly determines the overall structural mechanical performance of the distribution box. Before the welding process of the corner frames and base, pre-alignment of the two must be completed. After the alignment is qualified, the joint surfaces are fused using external welding equipment. Currently, the mainstream base and corner frame alignment operations mostly adopt a manual alignment mode, adjusting the relative posture of the two through visual inspection, and fixing them with temporary limiting fixtures after alignment is determined. This operation mode has drawbacks such as high adjustment frequency and cumbersome calibration process, which affects production efficiency and alignment accuracy.

[0030] In this invention, the operator first completes the limiting constraint of the base. By controlling the switching mechanism 53 built into the constraint member 5, the driving member 534 in the switching mechanism 53 drives the rotating plate 531 to rotate uniformly around its central axis, and the wedge block 532 connected to the rotating plate 531 rotates synchronously with the rotating plate 531. Since the guide slope of the wedge block 532 is in surface contact with the arc surface of the contact block 56, in the initial state, the arc surface of the contact block 56 is at the lowest stroke position of the wedge block 532. As the rotating plate 531 continues to rotate, the squeezing force of the wedge block 532 on the contact block 56 gradually increases, forcing the constraint block 52 to make linear displacement along the guide hole 51. At the same time, the return spring 55 on the outside of the constraint block 52 is in a stretched state until the limiting space formed by the four sets of constraint blocks 52 is larger than the outer dimensions of the base.

[0031] At this point, the operator places the distribution box base to be welded into the limiting area enclosed by the four sets of constraint blocks 52. After placement, the drive component 534 is controlled to rotate in reverse, causing the rotary plate 531 and wedge block 532 to rotate synchronously in the opposite direction, gradually releasing the squeezing pressure between the wedge block 532 and the contact block 56. Under the elastic restoring force of the return spring 55, the constraint block 52 returns to its original position along the guide hole 51 until the side of the constraint block 52 with the flexible rubber pad 54 makes surface contact with the corresponding side of the base, completing the positioning and clamping of the base. This prevents displacement of the base during subsequent corner frame docking and ensures the accuracy of the subsequent welding reference between the base and the corner frame.

[0032] It is worth noting that the constraint block 52 is fitted with a flexible rubber pad 54 on the side near the base. The flexible material can buffer the clamping force and avoid scratching and deformation of the base surface caused by rigid contact. At the same time, the constraint block 52 has four blocks arranged in a circular array along the center line of the base 1. With the cooperation of the switching mechanism 53, the four constraint blocks 52 can move synchronously along the guide hole 51, which can avoid uneven force on the base during the base limiting process, which would cause the base to deform and affect the later production of the distribution box.

[0033] After the base is positioned, the operator inserts the corner frames to be welded into the limiting components 4 one by one, so that the inner side of the corner frames faces the base. In the initial position, the movable frame 41 in the limiting component 4 is in the initial stroke position, that is, the abutment rod 441 assembled with the limiting block 44 is in the initial section 311 area of ​​the abutment plate 31. At this time, the initial section 311 does not exert a lateral constraint force on the abutment rod 441. Under the preload of the compression spring 45, the limiting space formed between the limiting block 44 and the corner block 42 on the movable block is at its maximum size (this limiting space size is slightly larger than the outer size of the corner frame). The operator places the corner frame to be aligned into the limiting space enclosed by the corner block 42 and the limiting block 44 on the same side.

[0034] It is worth noting that both corner block 42 and limiting block 44 adopt an L-shaped structure design, which can be adapted to the shape of the L-shaped corner frame, providing a structural basis for the precise centering of the corner frame in the future.

[0035] When the corner frame is fully inserted into the limiting space enclosed by the corner block 42 and the limiting block 44, since the size of the limiting space is slightly larger than the outer size of the corner frame, and the compression spring 45 only provides "pre-tightening force" rather than "clamping force" in the initial state (the pre-tightening force can only maintain the position of the limiting block 44 and cannot generate enough lateral pressure to fix the corner frame), the corner frame is not rigidly clamped by the corner block 42 and the limiting block 44, and is only in the basic state of "being enclosed by space and not falling off", that is, the inner side of the corner frame will overlap the limiting block 44. The drive unit (the drive unit can be a linear drive element such as a cylinder or an electric push rod, and the present invention prefers to use a cylinder) mounted on the support plate 3 drives the movable frame 41 to descend vertically along the central axis of the guide frame 2. During this process, the abutment rod 441 on the limiting block 44 slides from the initial section 311 of the abutment plate 31 to the constraint section 312. The width of the constraint section 312 is greater than that of the initial section 311, and the two are smoothly connected by a transition slope. As the downward stroke of the movable frame 41 increases, the abutment rod 441 gradually enters the constraint section 312 from the initial section 311 along the transition slope. Under the guidance of the constraint section 312, the abutment rod 441 drives the limit rod to make a feeding motion along the axis of the guide rod group 43 towards the corner frame.

[0036] During this process, the corner frame's posture is gradually corrected until the outer side of the corner frame and the inner side of the corner block 42 achieve surface contact and fit together, and the inner side of the corner frame and the outer side of the limiting block 44 achieve surface contact and fit together, completing the posture correction of the tilted corner frame (the contact surface between the limiting block 44 and the corner frame is a smooth metal surface, which, combined with the elastic clamping force of the compression spring 45, ensures both positioning reliability and avoids plastic deformation of the corner frame due to excessive compression). After correction, the bottom end face of the corner frame is aligned with the corresponding side edge of the base. After successful alignment, the operator uses external welding equipment to complete the welding operation of the junction surface between the distribution box base and the corner frame.

[0037] It is worth noting that when the drive unit moves the limiting component 4 along the central axis of the guide frame 2, there is a certain gap between its maximum stroke position and the base. The gap size between the movable frame 41 and the base (preset to a reasonable range suitable for welding torch operation, specifically designed according to common welding torch diameters and swing strokes) can completely expose the contact surface between the corner frame and the base (i.e., the weld seam to be welded), and there is no tooling structure obstructing the gap space. The welding equipment (manual welding torch or automated welding torch) can extend into the weld seam area from any radial or axial angle in the gap. Whether it is the inner corner of the corner frame, the outer corner, or the end of the weld seam, the welding torch can achieve unobstructed docking. The standardized gap environment ensures that the welding parameters of each distribution box are uniform and the weld seam forming quality is consistent, avoiding the impact of welding quality fluctuations on the protective performance of the distribution box.

[0038] After welding is completed, the operator controls the drive unit on the support plate 3 to reverse the action, driving the movable frame 41 to move upward as a whole. The abutment rod 441 slides along the transition slope from the constraint section 312 to the initial section 311. Under the action of the elastic restoring force of the compression spring 45, the limit block 44 gradually resets to the initial position, releasing the positioning constraint of the diagonal frame.

[0039] It is worth noting that the end of the abutment rod 441 is fitted with a ball bearing 443 via the mounting base 442, which converts the sliding friction between the abutment rod 441 and the abutment plate 31 into rolling friction, significantly reducing the frictional resistance between the two and improving the smoothness of the movement of the abutment rod 441. At the same time, the design height of the corner frame is lower than that of the support plate 3, so that after the drive unit drives the movable frame 41 to reset, it is convenient for the operator to remove the welded base and corner frame assembly from the working space between the support plate 3 and the base 1.

[0040] After the limiting component 4 releases the constraint of the diagonal frame, the operator drives the driving component 534 in the switching mechanism 53 again. The rotating plate 531 drives the wedge block 532 to rotate again. The guide slope of the wedge block 532 re-presses the arc surface of the contact block 56, forcing the constraint block 52 that is in contact with the base to move in the opposite direction along the guide hole 51 and detach from the base, thus releasing the positioning constraint on the base. The operator can then remove the welded base and corner frame assembly to complete the entire operation process.

[0041] The present invention employs a constraint member 5 and a limiting member 4, which has the following advantages: Firstly, it significantly improves the positioning accuracy of the base and corner frame docking, avoiding misalignment during subsequent welding. The four constraint blocks 52 are arranged in a circular array along the center line of the base 1. The constraint blocks 52 are driven to contract or expand synchronously by the switching mechanism 53 (rotating plate 531 + wedge block 532), clamping the base evenly from all sides to ensure that the center of the base coincides with the reference of the base 1. At the same time, the four corner blocks 42 and the limiting blocks 44 correspondingly enclose the corner frame. The central axis of the abutment rod 441 coincides with the diagonal of the base. When the movable frame 41 descends, the abutment rod 441 slides along the constraint section 312 of the abutment plate 31, driving the limiting block 44 to squeeze the corner frame from the inside. This, together with the outer corner block 42, achieves "bidirectional positioning inside and outside," forcing the corner frame to be precisely aligned with the end face of the base, completely solving the reference deviation problem of manual visual positioning.

[0042] Secondly, the limiting block 44 adopts an L-shaped structure to fit the inner side of the corner frame, and the corner block 42 adopts an L-shaped structure to fit the outer side of the corner frame, forming a "surface adaptation" constraint. When the movable frame 41 descends, the abutment rod 441 slides from the initial section 311 of the abutment plate 31 (without lateral constraint) to the constraint section 312 (width expansion + transition slope guide). Under the combined action of the lateral thrust of the constraint section 312 and the restoring force of the compression spring 45, the limiting block 44 forces the corner frame to correct its tilt and offset posture until the inner and outer sides of the corner frame are completely fitted with the corner block 42 and the limiting block 44 respectively, realizing "the descent process is the correction process", without the need for manual adjustment of the corner frame posture.

[0043] Thirdly, the end of the abutment rod 441 is fitted with a ball 443 through the mounting base 442, which converts the sliding friction between the abutment rod 441 and the abutment plate 31 into rolling friction, significantly reducing the frictional resistance between the two and improving the smoothness of the movement of the abutment rod 441. In addition, the arc surface of the wedge block 532 and the contact block 56 has a self-centering characteristic, which reduces off-center wear and improves the durability of the switching mechanism 53.

[0044] Fourthly, the four constraint blocks 52 are arranged in a circular array along the center line of the base 1. The constraint blocks 52 are driven by the switching mechanism 53 to synchronously contract or expand along the guide hole 51, clamping the base evenly from all sides. At the same time, the four corner blocks 42 and the limiting blocks 44 correspond to enclose the corner frame. The central axis of the abutment rod 441 coincides with the diagonal of the base. When the movable frame 41 descends, the abutment rod 441 slides along the constraint section 312 of the abutment plate 31, driving the limiting block 44 to squeeze the corner frame from the inside to complete the corner frame's limitation. The positioning parameters of the base and the corner frame during constraint (such as the opening and closing stroke of the constraint block 52 and the correction stroke of the limiting block 44) are fixed, ensuring that the positioning reference of all workpieces is consistent during mass production.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixture for mating a base and a corner frame in the fabrication of a distribution box, characterized in that, include: The base (1) is fixedly connected to a support plate (3) by a guide frame (2) set on its top. The guide frame (2) has two members and is symmetrically distributed along the center plane of the base (1). The outer circumferential surface of the guide frame (2) is equipped with a limiting member (4) for constraining the corner frame. The top of the support plate (3) is equipped with a drive unit for driving the limiting member (4) to move up and down along the central axis of the guide frame (2). The base (1) is provided with a constraint member (5) for limiting the base. The constraint member (5) includes a guide hole (51) opened on the top of the base (1). The guide hole (51) has four holes and is arranged in a circular array along the center line of the base (1). A constraint block (52) that fits against the outside of the base is slidably connected in the guide hole (51). The base (1) is provided with a switching mechanism (53) at the bottom for adjusting the position of the constraint block (52).

2. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 1, characterized in that: The constraint block (52) is fitted with a flexible rubber pad (54) on the side near the base. The constraint block (52) is connected to the inner wall of the guide hole (51) through a reset spring (55) set on its outer side. A contact block (56) is fixedly connected to the bottom of the constraint block (52), and the contact block (56) is arc-shaped on the side near the reset spring (55).

3. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 2, characterized in that: The switching mechanism (53) includes a rotating plate (531) rotatably connected to the bottom of the base (1), and a wedge (532) that fits against the arc surface of the contact block (56) is fixedly connected to the outside of the rotating plate (531).

4. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 3, characterized in that: The base (1) is fixedly connected to a drive unit (534) that is connected to a rotating plate (531) via a mounting bracket (533) located at its bottom.

5. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 1, characterized in that: The limiting component (4) includes a movable frame (41) with a sliding connecting seat outside the guide frame (2). The movable frame (41) has a corner block (42) that fits against the outside of the corner frame. The corner block (42) has four pieces and is arranged in a circular array along the center line of the movable frame (41).

6. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 5, characterized in that: The inner side of the movable frame (41) is fixedly connected to a guide rod assembly (43), and the number of the guide rod assembly (43) corresponds one-to-one with the number of corner blocks (42). The outer circumferential surface of the guide rod assembly (43) is slidably connected to a limiting block (44) that fits against the inner side of the corner frame. The outer circumferential surface of the guide rod assembly (43) is fitted with a compression spring (45).

7. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 6, characterized in that: The limiting block (44) is fixedly connected to an abutment rod (441), and the central axis of the abutment rod (441) coincides with the diagonal of the base. The abutment rod (441) is fixedly connected to a mounting base (442) on the side away from the limiting block (44), and a ball (443) is fitted inside the mounting base (442).

8. The fixture for connecting the base and corner frame in the processing of a distribution box according to claim 7, characterized in that: The bottom of the support plate (3) is fixedly connected to an abutment plate (31), and the abutment plate (31) has an integrally formed initial section (311) and a constraint section (312) on the side near the rolling ball (443).

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