Bending device for small distribution box shell
By using a combination of a first bending block and a second bending block in the bending device for the distribution box housing, along with an electric push rod and a pressing roller, the problems of scratching and noise caused by the sharp right-angle notch of the rotating block are solved, achieving smooth bending without scratching or noise, and improving processing accuracy and appearance quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG GUOMIAO ELECTRIC POWER EQUIPMENT CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-12
AI Technical Summary
In existing distribution box shell bending devices, the right-angle notch edge of the rotating block is too sharp, causing the floating plate and the shell surface to rub against each other, resulting in scratches and harsh noise, affecting processing accuracy and the environment.
The system employs a combination of a first bending block and a second bending block, along with an electric push rod and a pressing roller. The buffer plate helps to prevent direct contact between right-angle notches, and the bending process is controlled by a sensor to ensure uniform force distribution and no scraping.
It achieves smooth bending without scratches or noise, improves processing accuracy and product appearance quality, and improves the working environment.
Smart Images
Figure CN224222405U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical distribution box shell bending technology, specifically a small electrical distribution box shell bending device. Background Technology
[0002] Distribution boxes are commonly used electrical equipment, prized for their small size, ease of installation, and lack of site restrictions. Their production requires sheet metal, which must be bent before assembly. Currently, common distribution box bending devices typically use pneumatic cylinder bending. In this method, the box is first fixed, then the cylinder presses against it to bend it. However, this method easily damages the box shell because the contact area between the stamped part and the shell gradually decreases during bending. Furthermore, the direct stamping process results in uneven force distribution, easily causing wear and damage to the shell surface.
[0003] Currently, patent publication number CN220239704U proposes a bending device for distribution box panels, including an operating table and a bending table. The bending table is fixedly connected to the top of the operating table, and a bracket is fixedly connected to the top of the operating table. A first hydraulic mechanism is fixedly connected to the end of the bracket. The first hydraulic mechanism is vertically arranged, and a pressure plate is fixedly connected to the output end of the first hydraulic mechanism. A gantry frame is fixedly connected to the side of the operating table, and a second hydraulic mechanism is fixedly connected to the top surface of the inner side of the gantry frame. A pressure member is fixedly connected to the output end of the second hydraulic mechanism. A rotating block is movably connected to the bottom of the pressure member, and the rotating block has a right-angle notch. A spring is fixedly connected to the bottom of the pressure member, and a floating plate is fixedly connected to the bottom end of the spring. The end of the floating plate abuts against the inner side of the right-angle notch.
[0004] The existing technical solution uses a combination of a first hydraulic mechanism, a pressure plate, a gantry frame, a second hydraulic mechanism, a pressure component, a rotating block, a right-angle notch, a spring, and a floating plate. It employs a double-pressure mechanism, where the floating plate and the pressure plate apply double pressure to the distribution box panel, ensuring its stable compaction. The rotating block structure is used to bend the edges of the distribution box panel, with a maximum bending angle of 90 degrees. This allows for smooth bending of the distribution box panel with uniform force, ensuring a good bending effect. It avoids direct bending, providing a gradual pressure and bending effect that minimizes damage to the panel.
[0005] However, the existing technical solutions still have the following drawbacks in operation:
[0006] In existing technical solutions, a rotatable rotating block structure is used to bend the edge of the distribution box plate. However, the edges of the right-angle notches on the rotating block are very sharp. The two edges of the right-angle notches abut against the floating plate and the distribution box plate, respectively. The floating plate moves up and presses against one edge of the right-angle notch, thereby driving the rotating block to rotate. The other edge of the right-angle notch rotates and presses against the distribution box plate. During the rotation of the rotating block, the sharp edges of the two right-angle notches will scratch the floating plate and the distribution box plate, causing scratches and damage to them. At the same time, the processing will also produce a harsh sound, reduce the processing accuracy, and affect the working environment. Utility Model Content
[0007] This utility model aims to provide a small distribution box shell bending device, mainly to solve the problem of existing technology where the right-angle notch on the rotating block has a sharp edge. During the bending process, the notch will directly contact the floating plate and the distribution box plate. When the floating plate moves upward, it will squeeze one edge of the right-angle notch, thereby driving the rotating block to rotate. At the same time, the other edge of the notch will squeeze the edge of the distribution box plate to complete the bending action. Because the edge of the right-angle notch is too sharp, it will cause obvious scratches on the surface of the floating plate and the distribution box plate during rotation. This not only causes scratches on the surface of the sheet metal, affecting the appearance quality of the product, but also generates harsh metallic friction noise during processing, reducing processing accuracy and affecting the working environment.
[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0009] A small distribution box housing bending device includes an operating table with a bending seat and a mounting frame. A hydraulic cylinder is mounted on the inner wall of the mounting frame, and a pressing plate is fixedly connected to the output end of the hydraulic cylinder. A spring is fixedly connected to the lower end face of the pressing plate, and a buffer plate is fixedly connected to the other end of the spring. A first bending block is rotatably connected to the inner wall of the pressing plate. An installation groove is formed in the inner wall of the first bending block, and a plurality of electric push rods are fixedly connected to the inner wall of the installation groove. A second bending block is fixedly connected to the output end of the electric push rods. A sensor is embedded in the inner wall of the first bending block. Both the first and second bending blocks have receiving grooves in their inner walls, and a pressing component for pressing the distribution box housing is provided in the receiving groove.
[0010] The working principle and beneficial effects of this utility model:
[0011] 1. Working Principle: When bending the distribution box housing, first place the distribution box housing on the bending table, start the operation switch (the output end of the first hydraulic mechanism drives the pressure plate to fix the distribution box housing), the output end of the hydraulic cylinder drives the extrusion plate to move downwards, the extrusion plate moves downwards synchronously, the spring moves downwards synchronously, the spring moves downwards synchronously, the extrusion plate moves downwards synchronously, and the extrusion plate also moves downwards synchronously, causing the first bending block and the electric push rod to move downwards synchronously, the electric push rod moves downwards, causing the second bending block to move downwards, and the synchronous downward movement of the first bending block and the second bending block will drive the extrusion assembly to move downwards synchronously. When the buffer plate contacts the distribution box housing, the upper surface of the buffer plate presses against the pressing component. The pressing component drives the first bending block to rotate. The rotation of the first bending block drives the electric push rod to rotate synchronously. The rotation of the electric push rod drives the second bending block to rotate synchronously. The pressing component on the second bending block will press against the distribution box housing and bend the distribution box housing. When the housing is bent by 90 degrees, the sensor embedded in the inner wall of the first bending block senses that the inner wall of the first bending block is horizontal with the upper surface of the buffer plate. At this time, the output end of the electric push rod drives the second bending block to move downward along the distribution box housing, and the pressing component smooths the distribution box housing.
[0012] 2. Beneficial effects:
[0013] (1) The existing technology uses a combination of a first hydraulic mechanism, a pressure plate, a gantry frame, a second hydraulic mechanism, a pressure component, a rotating block, a right-angle notch, a spring, and a floating plate. It employs a double-pressure mechanism, where the floating plate and the pressure plate apply double pressure to the distribution box panel, ensuring stable pressure. A rotatable rotating block structure is used to bend the edge of the distribution box panel, with a maximum bending angle of 90 degrees. This achieves smooth bending of the distribution box panel with uniform force, ensuring a good bending effect. It avoids direct bending, providing a gradual pressure and bending effect, thus minimizing damage to the panel. However, the right-angle notch on the rotating block has a very sharp edge. The two edges of the right-angle notch abut against the floating plate and the distribution box panel respectively. The floating plate moves upward to press one edge of the right-angle notch, driving the rotating block to rotate. The other edge of the right-angle notch rotates and presses against the distribution box panel. During the rotation of the rotating block, the right-angle notch... The sharp edges of the notch at the corner can scratch the floating plate and the distribution box panel, causing damage. This also generates a harsh noise during processing, reducing machining accuracy and affecting the working environment. This solution, through the coordinated use of a first bending block, an electric push rod, a second bending block, and an extrusion assembly, ensures that when the first bending block is pressed by the buffer plate, and when the second bending block presses against the distribution box housing, the upper surface of the buffer plate does not scratch the outer wall of the distribution box. This solves the technical problem that the sharp edges of the right-angle notch on the rotating block cause significant scratches to the surface of the floating plate and distribution box panel during rotation, resulting in scratches on the material surface, affecting product appearance quality, and generating harsh metallic friction noise during processing, reducing machining accuracy and affecting the working environment.
[0014] (2) In this solution, by using a combination of several electric push rods, sensors and a second bending block fixed in the mounting groove, after the housing is bent at 90 degrees, the output end of the electric push rod pushes out the second bending block, and the second bending block drives the extrusion assembly to extrude and flatten the bent housing, preventing the edges from warping.
[0015] Preferably, the cross-sections of the first bending block and the second bending block are arranged in the shape of a three-quarter circle, and a 90-degree angle is formed between the inner wall of the first bending block and the outer wall of the second bending block; the 90-degree angle between the inner wall of the first bending block and the outer wall of the second bending block ensures that the shell can be bent by 90 degrees when the first bending block and the second bending block are rotated.
[0016] Preferably, the extrusion assembly includes a fixed rod fixed to the inner wall of the receiving groove, and an extrusion roller is rotatably connected to the outer wall of the fixed rod; the surface of the extrusion roller is smooth and has an arc, so that when the distribution box housing is extruded and bent, the surface of the distribution box housing will not be scratched, thus preventing the production of harsh noise during processing and affecting the working environment.
[0017] Preferably, the inner wall of the first bending block is provided with a clearance groove for use with the extrusion roller; ensuring that the inner wall of the first bending block will not obstruct the movement of the extrusion roller in the receiving groove provided in the first bending block.
[0018] Preferably, a plurality of guide sleeves are fixedly connected in the mounting groove, and a guide rod is slidably connected in the guide sleeve. One end of the guide rod is fixedly connected to the second bending block. When the output end of the electric push rod drives the second bending block to move, since one end of the guide rod is fixedly connected to the second bending block, the guide rod slides along the guide sleeve, making the movement of the second bending block more stable and ensuring the accuracy of the processing device.
[0019] Preferably, rubber pads are fixed to the inner wall of the first bending block and the outer wall of the second bending block; this prevents rubbing when the inner wall of the first bending block is pressed against the upper surface of the buffer plate, and when the outer wall of the second bending block is pressed against the outer wall of the distribution box housing, thus ensuring the aesthetics of the housing.
[0020] Preferably, a buffer pad is fixed to the lower end face of the buffer plate to prevent the buffer plate from rigidly contacting the distribution box housing and causing scratches on the housing surface. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of a small distribution box shell bending device according to this utility model patent;
[0022] Figure 2 This is a cross-sectional view of the first bending block of a small distribution box housing bending device according to this utility model patent.
[0023] Figure 3 This is a cross-sectional view of the first bending block of a small distribution box housing bending device according to this utility model patent.
[0024] Figure 4 This is a structural diagram of the mounting groove of a small distribution box housing bending device according to this utility model patent;
[0025] Figure 5 This is a cross-sectional view of the guide sleeve of a small distribution box housing bending device according to this utility model patent.
[0026] The reference numerals in the accompanying drawings include: 1. Operating table; 2. Bending seat; 3. Mounting bracket; 4. Hydraulic cylinder; 5. Extrusion plate; 6. Spring; 7. Buffer plate; 8. First bending block; 9. Mounting groove; 10. Electric push rod; 11. Second bending block; 12. Sensor; 13. Receiving groove; 14. Fixing rod; 15. Extrusion roller; 16. Guide sleeve; 17. Guide rod; 18. Alternating groove; 19. Rubber pad; 20. Buffer pad. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] like Figures 1-5 A small distribution box housing bending device is shown, comprising an operating table 1, a bending seat 2 mounted on the operating table 1, a mounting frame 3 provided on the operating table 1, a hydraulic cylinder 4 mounted on the inner wall of the mounting frame 3, a pressing plate 5 fixedly connected to the output end of the hydraulic cylinder 4, a spring 6 fixedly connected to the lower end face of the pressing plate 5, a buffer plate 7 fixedly connected to the other end of the spring 6, a buffer pad 20 fixedly connected to the lower end face of the buffer plate 7, a first bending block 8 rotatably connected to the inner wall of the pressing plate 5, an installation groove 9 provided on the inner wall of the first bending block 8, a plurality of electric push rods 10 fixedly connected to the inner wall of the installation groove 9, a second bending block 11 fixedly connected to the output end of the electric push rods 10, a plurality of guide sleeves 16 fixedly connected to the installation groove 9, a guide rod 17 slidably connected to the guide sleeves 16, one end of the guide rod 17 fixedly connected to the second bending block 11, the cross-sections of the first bending block 8 and the second bending block 11 being arranged in a three-quarter circle, the inner wall of the first bending block 8 and the... The outer walls of the second bending block 11 form a 90-degree angle, ensuring that the first bending block 8 and the second bending block 11 can bend the housing by 90 degrees when rotated. A sensor 12 is installed on the inner wall of the first bending block 8. Both the inner walls of the first bending block 8 and the second bending block 11 are provided with receiving grooves 13. A pressing assembly for pressing the distribution box housing is provided in the receiving groove 13. The pressing assembly includes a fixing rod 14 fixed to the inner wall of the receiving groove 13. A pressing roller 15 is rotatably connected to the outer wall of the fixing rod 14. The inner wall of the first bending block 8 is provided with a clearance groove 18 that cooperates with the pressing roller 15. The surface of the pressing roller 15 is smooth and has a curvature. When pressing and bending the distribution box housing, it will not scratch the surface of the distribution box housing, thus avoiding the generation of harsh noise during processing and affecting the working environment. Rubber pads 19 are fixed to the inner wall of the first bending block 8 and the outer wall of the second bending block 11.
[0029] As can be seen from the above, the specific embodiments of this utility model are as follows:
[0030] When bending of the distribution box housing is required, first place the distribution box housing on the bending seat 2 fixed to the upper end face of the operating table 1, and start the switch of the operating table 1 (the output end of the first hydraulic mechanism drives the pressure plate to fix the distribution box housing). (The part in parentheses refers to the existing technical solution, which is not described in detail in this application document.) The output end of the hydraulic cylinder 4 fixed to the mounting bracket 3 drives the pressing plate 5 to move downward. The downward movement of the pressing plate 5 causes the spring 6 fixed to the lower end face to move downward synchronously. The downward movement of the spring 6 causes the buffer plate 7 fixed to one end to move downward. The downward movement of the buffer plate 7 causes the buffer pad 20 to move downward synchronously. At the same time, the downward movement of the pressing plate 5 also causes the first inner wall to rotate and connect. The bending block 8 moves downward, causing the sensor 12 mounted on the inner wall to move downward as well. The sensor 12 is connected to the electric push rod 10. When it detects that the inner wall of the first bending block 8 is parallel to the upper surface of the buffer plate 7, a trigger signal is generated. The downward movement of the first bending block 8 causes the electric push rod 10 fixed in the mounting groove 9 to move downward. The electric push rod 10 is connected to an external power supply via an electric wire. The guide sleeve 16 in the mounting groove 9 moves downward synchronously. At the same time, the second bending block 11 fixed to the output end of the electric push rod 10 moves downward synchronously. The fixed components are fixed in the receiving grooves 13 opened on the inner walls of the first bending block 8 and the second bending block 11. The rod 14 and the compression roller 15 rotatably connected to the outer wall of the fixed rod 14 move down synchronously. The guide rod 17 fixed to one end of the second bending block 11 moves down synchronously. When the buffer pad 20 fixed to the lower end face of the buffer plate 7 abuts against the distribution box housing, the buffer plate 7 reverses the compression spring 6 and moves up. The upward movement of the buffer plate 7 will compress the compression roller 15 in the receiving groove 13 opened in the inner wall of the first bending block 8. After being compressed, the compression roller 15 will drive the first bending block 8 to rotate. The rotation of the first bending block 8 will drive the electric push rod 10 and the guide sleeve 16 in the mounting groove 9 to rotate synchronously. The rotation of the guide sleeve 16 will drive the guide rod 17 to rotate. The rotation of the electric push rod 10 will drive the second bending block 11 to rotate synchronously. 1. The second bending block 11 rotates, causing the extrusion roller 15 to rotate. The extrusion roller 15 rotates and extrudes the distribution box housing, bending it to 90 degrees. The extrusion roller 15 on the first bending block 8 enters the clearance groove 18 opened in the inner wall of the first bending block 8. At this time, after the sensor 12 senses that the inner wall of the first bending block 8 and the upper end face of the buffer plate 7 are in a parallel opposing relationship, the output end of the electric push rod 10 drives the second bending block 11 to move downward. The downward movement of the second bending block 11 will cause the guide rod 17 fixed at one end to slide downward along the guide sleeve 16. The downward movement of the second bending block 11 will drive the extrusion roller 15 to roll and smooth along the outer wall of the bent distribution box housing.
[0031] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A small distribution box housing bending device, comprising an operating table (1), a bending seat (2) mounted on the operating table (1), a mounting frame (3) provided on the operating table (1), and a hydraulic cylinder (4) mounted on the inner wall of the mounting frame (3), characterized in that, The output end of the hydraulic cylinder (4) is fixedly connected to an extrusion plate (5), and a spring (6) is fixedly connected to the lower end face of the extrusion plate (5). The other end of the spring (6) is fixedly connected to a buffer plate (7). The inner wall of the extrusion plate (5) is rotatably connected to a first bending block (8). The inner wall of the first bending block (8) is provided with an installation groove (9). The inner wall of the installation groove (9) is fixedly connected to several electric push rods (10). The output end of the electric push rod (10) is fixedly connected to a second bending block (11). The inner wall of the first bending block (8) is provided with a sensor (12). The inner walls of the first bending block (8) and the second bending block (11) are both provided with a receiving groove (13). The receiving groove (13) is provided with an extrusion assembly for extruding the distribution box housing.
2. The small distribution box housing bending device according to claim 1, characterized in that, The cross-sections of the first bending block (8) and the second bending block (11) are arranged in a three-quarter circle, and a 90-degree angle is formed between the inner wall of the first bending block (8) and the outer wall of the second bending block (11).
3. The small distribution box housing bending device according to claim 1, characterized in that, The extrusion assembly includes a fixed rod (14) fixed to the inner wall of the receiving groove (13), and an extrusion roller (15) is rotatably connected to the outer wall of the fixed rod (14).
4. The small distribution box housing bending device according to claim 3, characterized in that, The inner wall of the first bending block (8) is provided with a clearance groove (18) that works in conjunction with the extrusion roller (15).
5. The small distribution box housing bending device according to claim 3, characterized in that, A plurality of guide sleeves (16) are fixedly connected in the mounting groove (9), and a guide rod (17) is slidably connected in the guide sleeve (16). One end of the guide rod (17) is fixedly connected to the second bending block (11).
6. The small distribution box housing bending device according to claim 1, characterized in that, Rubber pads (19) are fixed to the inner wall of the first bending block (8) and the outer wall of the second bending block (11).
7. The small distribution box housing bending device according to claim 1, characterized in that, A buffer pad (20) is fixed to the lower end face of the buffer plate (7).