Machining device for vacuum circuit breaker accessories

Abstract

The invention discloses a machining device for a vacuum circuit breaker accessory, relates to the technical field of polishing equipment, and aims to solve the technical problem that when current polishing equipment is used for polishing a plum blossom moving contact and a columnar static contact, a polishing head needs to be replaced or two production lines need to be arranged to complete work, and the machining device comprises a polishing workbench provided with a mechanical arm. Through the variable polishing assembly, when the columnar static contact is polished, the variable polishing assembly is switched to a triangular distribution state for polishing; when the plum blossom moving contact is polished, the variable polishing assembly is adjusted to be in a linear distribution state, and the polishing rod polishes the surface of a silver-plated contact piece on the side face of the plum blossom moving contact and a stainless steel support on the end face of the plum blossom moving contact. Through the deformable variable polishing assembly, different polishing requirements of the plum blossom moving contact and the columnar static contact can be met, the limitation of the single function of traditional polishing equipment is broken through, and efficient polishing of the plum blossom moving contact and the columnar static contact on the same production line is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing equipment, and more specifically to a processing device for vacuum circuit breaker accessories. Background Art

[0002] Vacuum circuit breakers are commonly used switchgear in power systems. They are widely used because of their strong arc extinguishing ability, small size, and long life. As a key component of vacuum circuit breakers, the performance of contacts directly affects the working reliability of circuit breakers. In actual operation, the contacts need to carry large currents and quickly cut off the current when opening and closing. If the contact surface is rough or uneven, it will increase the contact resistance and cause local overheating. It may also cause uneven distribution of the electric field, reduce insulation performance, affect arc extinguishing effects, and even shorten the service life of the contacts, threatening the safe and stable operation of the power system. In order to solve the above problems, the contacts of vacuum circuit breakers need to be polished to improve the surface quality of the contacts, enhance their electrical and mechanical properties, and ensure efficient and reliable operation of vacuum circuit breakers.

[0003] However, existing vacuum circuit breakers are often divided into moving and static contacts. A common solution is to use a plum blossom moving contact in conjunction with a columnar static contact. However, due to the different structures of the plum blossom moving contact and the columnar static contact, the existing polishing equipment often needs to replace the polishing head or arrange two production lines to complete the work when polishing the two. In view of this, we propose a processing device for vacuum circuit breaker accessories. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a processing device for vacuum circuit breaker accessories to solve the technical problem that the current polishing equipment needs to replace the polishing head or arrange two production lines to complete the work when polishing the plum blossom moving contact and the columnar static contact.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A processing device for vacuum circuit breaker accessories, comprising a polishing workbench provided with a mechanical arm and a variable polishing assembly connected to the mechanical arm through a first rotation drive; The variable polishing assembly has a triangular distribution state and a linear distribution state, and the variable polishing assembly includes three polishing drive parts, the polishing drive parts are connected to polishing rods, and the polishing drive parts are used to drive the polishing rods to rotate along the axis; In the triangular distribution state, the variable polishing assembly distributes the three polishing rods in an equilateral triangle shape on the horizontal plane through the three polishing parts, the first rotation drive causes the three triangularly distributed polishing rods to rotate around the center point, and the polishing drive part works to polish the inner wall and the outer wall of the columnar static contact; In the linear distribution state, the variable polishing assembly uses three polishing parts to make three polishing rods linearly distributed on the horizontal plane, the mechanical arm makes the linearly distributed polishing parts perpendicular or parallel to the horizontal plane, and the polishing drive part works to polish the end face and side face of the plum blossom moving contact.

[0006] Preferably, the variable polishing assembly further comprises a telescopic drive structure, the telescopic drive structure comprising a mounting frame, a second rotary drive, a transmission wheel, a transmission belt, a screw rod, and a screw block; The mounting frame is mounted on the output end of the first rotary drive, the second rotary drive is mounted on the top of the mounting frame, the transmission wheel is mounted on the output end of the second rotary drive, the transmission wheel is connected to another transmission wheel through a transmission belt, the screw is mounted on another transmission wheel, and both ends of the screw are rotatably connected to the mounting frame, and the screw block is threadedly connected to the screw.

[0007] Preferably, the telescopic driving structure further comprises a guide block and a guide rod; The guide block is installed on the screw block, the guide block is slidably connected to the guide rod, and the guide rod is installed on the installation frame.

[0008] Preferably, the variable polishing assembly further comprises a connecting rod driving structure, wherein the connecting rod driving structure comprises a mounting plate, a telescopic connecting rod, a fixed connecting rod, and a mounting rod; The mounting plate is mounted on the screw block, the two telescopic connecting rods are rotatably connected to the two sides of the mounting plate respectively, the other end of the telescopic connecting rod is rotatably connected to the fixed connecting rod, and the fixed connecting rod is rotatably connected to the mounting rod.

[0009] Preferably, the telescopic connecting rod comprises a mounting seat, a telescopic drive, a connecting rod, and a connecting seat; The mounting seat is rotatably connected to the mounting plate, the telescopic drive is mounted on the mounting seat, the connecting rod is mounted on the output end of the telescopic drive, the connecting seat is mounted on the other end of the connecting rod, and the connecting seat is rotatably connected to the fixed connecting rod.

[0010] Preferably, the variable polishing assembly further comprises a fixed seat, a third rotation drive and a limit block; The fixed seat and the third rotary drive constitute a polishing drive unit, the third rotary drive is mounted on the fixed seat, a limit block is mounted on the fixed seat, a stabilizing slot is provided on one side of the limit block, guide balls are installed at the top and bottom ends of the entrance of the stabilizing slot, the fixed connecting rod is inserted and connected in the stabilizing slot, ball grooves are provided at the top and bottom ends of the fixed connecting rod, the guide balls are arranged in the ball grooves, and the edges of the ball grooves are arranged as arc structures, and the output end of the third rotary drive is connected to the center of the polishing rod.

[0011] Preferably, the variable polishing assembly further comprises a limiting structure, and the limiting structure comprises a limiting sleeve rod and a connecting block; The limiting sleeve rod comprises a plurality of sleeves nested in sequence, the limiting sleeve rod is connected with a mounting frame, the connecting block is mounted on the limiting sleeve rod, and the connecting block is connected with a mounting rod, and the moving track of the limiting sleeve rod is perpendicular to the moving track of the screw block in a horizontal plane.

[0012] Preferably, the variable polishing assembly further comprises three elastic tightening structures, and the elastic tightening structures comprise a sliding frame, an elastic member, and a sliding block; The three sliding frames are respectively connected with a mounting plate and two mounting rods, the elastic member is installed in the sliding frame, the sliding block is slidably connected in the sliding groove of the sliding frame, and the sliding block is installed on the elastic member, and the sliding block is connected with a fixing seat.

[0013] Preferably, the upper part and the lower part of the polishing rod are respectively configured as a brush rod portion and a hair rod portion, the surface of the brush rod portion is configured as bristles, and the surface of the hair rod portion is configured as a fiber hair layer.

[0014] Preferably, the bottom end of the polishing rod is set as a polishing head, the surface of the polishing head is set as an arc surface, the surface of the arc surface is provided with a plurality of radially distributed radial grooves along the center point, the surface of the arc surface is provided with a plurality of concentrically distributed annular grooves along the center point, and the annular grooves are connected to the radial grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a variable polishing assembly. When polishing a columnar static contact, the variable polishing assembly switches to a triangular distribution state, and three polishing rods are distributed in an equilateral triangle shape. The first rotation drive uses a high-precision servo motor to drive it to rotate around the center point. At the same time, the polishing drive unit makes the polishing rod rotate. Through a composite motion mode, the inner and outer walls of the columnar static contact can be polished, effectively removing surface defects and improving the finish. When polishing the plum blossom moving contact, the variable polishing assembly is adjusted to a linear distribution state, and the mechanical arm can flexibly adjust the linearly distributed variable polishing assembly to be vertical or parallel to the horizontal plane. When it is vertical to the horizontal plane, the polishing rod polishes the silver-plated contact surface on the side of the plum blossom moving contact. When it is parallel to the horizontal plane, the polishing rod polishes the stainless steel bracket on the end face of the plum blossom moving contact. The present invention uses a deformable variable polishing assembly to adapt to the different polishing requirements of the plum blossom moving contact and the columnar static contact, breaking through the single function limitation of traditional polishing equipment, and realizing efficient polishing of the plum blossom moving contact and the columnar static contact on the same production line.

[0016] 2. The present invention adopts the telescopic drive and connecting rod of the high-precision cylinder. In the linear distribution state, if it is necessary to adapt to the end polishing of the plum blossom moving contact of different sizes, the telescopic drive outputs linear motion, and the connecting rod drives the connecting seat to move along the hinge point direction of the fixed connecting rod, directly changing the linear distance between the mounting seat and the connecting seat, and then synchronously adjusting the spacing between adjacent polishing rods, while ensuring that the three polishing rods always remain collinear and equidistant during the translation process, avoiding the processing blind area caused by the fixed spacing of the traditional rigid structure. The present invention combines the telescopic connecting rod with adjustable length with the spatial positioning function of the robot arm to achieve flexible adaptation of the polishing path for the complex surface of the plum blossom moving contact.

[0017] 3. The present invention is provided with a telescopic link and a fixed link that are movably connected. When the mounting rod moves, the limit sleeve rod and the connecting block assist in moving. The fixed link can first convert the pressure into a rotational force. When the fixed link rotates to the limit position, the telescopic link is also driven to rotate a certain angle, and then continues to apply pressure to the fixed link, so that the fixed link is subjected to a linear movement force and drives the limit sleeve rod to move, thereby preventing the directly connected link from applying an inclined stress to the limit sleeve rod, causing the limit sleeve rod to bend and damage. The present invention is provided with a telescopic link and a fixed link that are movably connected, thereby preventing the limit sleeve rod from being subjected to excessively large inclined stress and reducing the probability of damage to the limit sleeve rod.

[0018] 4. The present invention provides a stabilizing slot and a guide ball on the limit block, and provides a corresponding ball groove on the fixed connecting rod. When the fixed connecting rod is rotated and inserted into the stabilizing slot, the guide ball can cooperate with the ball groove, so that the fixed connecting rod can be smoothly inserted into the limit block. The present invention provides corresponding structures on the limit block and the fixed connecting rod, so that the fixed connecting rod can be inserted into the limit block, so that it is not easy to disengage in the subsequent movement, thereby enhancing the stability of the movement.

[0019] 5. The present invention uses three elastic tightening structures to correspond to three polishing rods respectively. The elastic parts built into the sliding frame provide adjustable pre-tightening force. The sliding block slides in the slide groove of the sliding frame, so that the polishing rod connected to the fixed seat can move along the slide groove direction. When the linear distribution is used, the polishing rod polishes the end face of the plum blossom moving contact. When the polishing rod contacts the protruding part of the end face, the sliding block compresses the elastic part and moves backward to avoid surface scratches caused by rigid collision; when encountering the concave part of the end face, the elastic part stretches and pushes the polishing rod to stick to the curved surface. The present invention uses the elastic tightening structure to dynamically compensate for the concave-convex distance when processing the end face of the plum blossom moving contact, ensuring full contact polishing of complex surfaces.

[0020] 6. The present invention designs the polishing rod into a brush rod portion and a hair rod portion which are divided into upper and lower sections. The brush rod portion uses nylon bristles or metal wire bristles with high hardness, which are closely arranged to form a rigid polishing surface, which is suitable for polishing the stainless steel bracket of the plum blossom moving contact and can quickly correct the surface roughness. The hair rod portion is covered with a soft fiber hair layer, and its fluffy structure can store polishing paste and form a flexible polishing surface, which is suitable for fine polishing of the silver-plated contact of the plum blossom moving contact to avoid surface scratches of the silver-plated contact caused by hard contact. The present invention uses a segmented design to enable a single polishing rod to have dual processing effects. There is no need to change tools during the production process, and the polishing mode can be automatically matched to different parts of the plum blossom moving contact.

[0021] 7. The present invention can fit the inner bottom surface of the columnar static contact through the arc surface design of the polishing head. The radially distributed radial grooves, like diversion channels, quickly transport the polishing agent to all parts of the arc surface, so that the contact surface is evenly contacted with the polishing agent, thereby improving the polishing efficiency. The concentrically distributed annular grooves can not only store more polishing agent, but also cooperate with the radial grooves to form an efficient polishing agent flow network. During the polishing process, the network can take away the grinding chips in time to avoid the accumulation of grinding chips affecting the polishing quality. At the same time, the annular grooves and radial grooves increase the friction between the polishing head and the contact surface. The present invention makes the polishing efficiency higher and effectively improves the polishing quality of the contact through the structural design of the polishing head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention when processing a columnar static contact; Figure 2 It is a structural schematic diagram of the present invention when processing the end face of the plum blossom moving contact; Figure 3 It is a structural schematic diagram of the present invention when processing the side of the plum blossom moving contact; Figure 4 It is a schematic diagram of the structure of the variable polishing assembly and the polishing rod when the present invention is transformed into a triangular distribution state; Figure 5 It is a schematic diagram of the structure of the variable polishing assembly and the polishing rod when the present invention is transformed into a linear distribution state; Figure 6 It is a schematic diagram of the structure of the variable polishing assembly when the present invention is transformed into a triangular distribution state; Figure 7 It is a schematic diagram of the structure of the variable polishing assembly when the present invention is transformed into a linear distribution state; Figure 8 It is a structural schematic diagram of the telescopic driving structure of the present invention when it is transformed into a triangular distribution state; Fig. 9 It is a structural schematic diagram of the telescopic driving structure of the present invention when it is transformed into a linear distribution state; Fig.10It is a structural schematic diagram of the connecting rod driving structure when the present invention is transformed into a triangular distribution state; Fig.11 It is a structural schematic diagram of the connecting rod driving structure when the present invention is transformed into a linear distribution state; Fig.12 It is a schematic structural diagram of the position limiting structure when the present invention is transformed into a triangular distribution state; Fig.13 It is a schematic structural diagram of the position limiting structure when the present invention is transformed into a linear distribution state; Fig.14 It is a schematic cross-sectional view of the elastic tightening structure of the present invention; Fig.15 It is a schematic cross-sectional view of the contact position between the limit block and the fixed connecting rod of the present invention; Fig.16 It is a bottom view structural schematic diagram of the variable polishing assembly and the polishing rod when the present invention is transformed into a triangular distribution state; Fig.17 For the present invention Fig.16 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Description of the numbers in the figure: 1. Polishing workbench; 2. Variable polishing assembly; 3. Polishing rod; 101. Robotic arm; 201, first rotation drive; 202, telescopic drive structure; 203, connecting rod drive structure; 204, fixed seat; 205, third rotation drive; 206, limiting structure; 207, elastic tightening structure; 208, limiting block; 2021, mounting frame; 2022, second rotation drive; 2023, transmission wheel; 2024, transmission belt; 2025, screw rod; 2026, screw block; 2027, guide block; 2028, guide rod; 2031, mounting plate; 2032, telescopic connecting rod; 2033, fixed connecting rod; 2034, mounting rod; 2035, mounting seat; 2036, telescopic drive; 2037, connecting rod; 2038, connecting seat; 2039, ball groove; 2061, limiting sleeve rod; 2062, connecting block; 2071, sliding frame; 2072, elastic member; 2073, sliding block; 2081, stabilizing slot; 2082, guiding ball; 301, brush rod; 302, bristle rod; 303, polishing head; 3031, radial groove; 3032, annular groove. DETAILED DESCRIPTION

[0024] Embodiment 1, as Figures 1 to 5As shown, the present invention relates to a processing device for vacuum circuit breaker accessories, comprising a polishing workbench 1 provided with a mechanical arm 101 and a variable polishing assembly 2 connected to the mechanical arm 101 through a first rotary drive 201; the variable polishing assembly 2 has a triangular distribution state and a linear distribution state, and the variable polishing assembly 2 includes three polishing drive parts, the polishing drive part is connected to a polishing rod 3, and the polishing drive part is used to drive the polishing rod 3 to rotate along the axis; in the triangular distribution state, the variable polishing assembly 2 makes the three polishing rods 3 distributed in an equilateral triangle shape on the horizontal plane through the three polishing parts, the first rotary drive 201 makes the three triangularly distributed polishing rods 3 rotate around the center point, and the polishing drive part works to polish the inner wall and the outer wall of the columnar static contact; in the linear distribution state, the variable polishing assembly 2 makes the three polishing rods 3 distributed linearly on the horizontal plane through the three polishing parts, the mechanical arm 101 makes the linearly distributed polishing parts perpendicular to or parallel to the horizontal plane, and the polishing drive part works to polish the end face and side of the plum blossom moving contact.

[0025] The present invention uses a variable polishing assembly 2. When polishing a columnar static contact, the variable polishing assembly 2 switches to a triangular distribution state, and three polishing rods 3 are distributed in an equilateral triangle shape. The first rotary drive 201 uses a high-precision servo motor to drive it to rotate around the center point. At the same time, the polishing drive unit makes the polishing rod 3 rotate. The inner wall and outer wall of the columnar static contact can be polished through a composite motion mode, effectively removing surface defects and improving the finish. When polishing a plum blossom moving contact, the variable polishing assembly 2 is adjusted to a linear distribution state, and the mechanical arm 101 can flexibly adjust the linearly distributed variable polishing assembly 2 to be vertical or parallel to the horizontal plane. When it is vertical to the horizontal plane, the polishing rod 3 polishes the silver-plated contact surface on the side of the plum blossom moving contact. When it is parallel to the horizontal plane, the polishing rod 3 polishes the stainless steel bracket on the end face of the plum blossom moving contact. The present invention uses a deformable variable polishing assembly 2 to adapt to the different polishing requirements of the plum blossom moving contact and the columnar static contact, break through the single function limitation of traditional polishing equipment, and realize efficient polishing of the plum blossom moving contact and the columnar static contact on the same production line.

[0026] Specifically, Figures 6 to 13As shown, the variable polishing component 2 involved in the present invention also includes a telescopic drive structure 202, and the telescopic drive structure 202 includes a mounting frame 2021, a second rotary drive 2022, a transmission wheel 2023, a transmission belt 2024, a screw 2025, and a screw block 2026; the mounting frame 2021 is mounted on the output end of the first rotary drive 201, the second rotary drive 2022 is mounted on the top of the mounting frame 2021, the transmission wheel 2023 is mounted on the output end of the second rotary drive 2022, the transmission wheel 2023 is connected to another transmission wheel 2023 through a transmission belt 2024, the screw 2025 is mounted on another transmission wheel 2023, and both ends of the screw 2025 are rotatably connected to the mounting frame 2021, and the screw block 2026 is threadedly connected to the screw 2025.

[0027] The telescopic driving structure 202 also includes a guide block 2027 and a guide rod 2028 ; the guide block 2027 is mounted on the screw block 2026 , the guide block 2027 is slidably connected to the guide rod 2028 , and the guide rod 2028 is mounted on the mounting frame 2021 .

[0028] The variable polishing assembly 2 also includes a connecting rod driving structure 203, which includes a mounting plate 2031, a telescopic connecting rod 2032, a fixed connecting rod 2033, and a mounting rod 2034; the mounting plate 2031 is installed on the screw block 2026, and the two telescopic connecting rods 2032 are respectively rotatably connected to the two sides of the mounting plate 2031, and the other end of the telescopic connecting rod 2032 is rotatably connected to the fixed connecting rod 2033, and the fixed connecting rod 2033 is rotatably connected to the mounting rod 2034.

[0029] The telescopic link 2032 includes a mounting seat 2035, a telescopic drive 2036, a connecting rod 2037, and a connecting seat 2038; the mounting seat 2035 is rotatably connected to the mounting plate 2031, the telescopic drive 2036 is installed on the mounting seat 2035, the connecting rod 2037 is installed at the output end of the telescopic drive 2036, the connecting seat 2038 is installed at the other end of the connecting rod 2037, and the connecting seat 2038 is rotatably connected to the fixed link 2033.

[0030] The variable polishing assembly 2 also includes a limiting structure 206, which includes a limiting sleeve rod 2061 and a connecting block 2062; the limiting sleeve rod 2061 includes three sleeves nested in sequence, the limiting sleeve rod 2061 is connected to the mounting frame 2021, the connecting block 2062 is installed on the limiting sleeve rod 2061, and the connecting block 2062 is connected to the mounting rod 2034, and the moving track of the limiting sleeve rod 2061 is perpendicular to the moving track of the screw block 2026 in the horizontal plane.

[0031] The present invention uses a telescopic driving structure 202 and a connecting rod driving structure 203. In the telescopic driving structure 202, the second rotary drive 2022 uses a high-precision servo motor to control the rotation of the transmission wheel 2023, and drives the screw 2025 to rotate through the transmission belt 2024 and the transmission wheel 2023, driving the screw block 2026 to slide linearly along the guide rod 2028, and cooperates with the double-track limit of the guide block 2027 to ensure stable positioning. The connecting rod driving structure 203 converts the linear motion of the screw block 2026 into an angle adjustment of the polishing rod 3. When the screw block 2026 moves forward, the telescopic connecting rod 2032 pushes the fixed connecting rod 2033 to rotate around the mounting rod 2034. The mounting rod 2034 moves along a straight line through the limiting sleeve rod 2061 and the connecting block 2062, so that the three polishing rods 3 are gradually expanded from a linear arrangement to an equilateral triangle distribution. The limiting block 208 limits the rotation angle range. The third rotary drive 205 uses a high-precision servo motor to drive the polishing rod 3 to rotate to achieve polishing.

[0032] The present invention is provided with a telescopic link 2032 and a fixed link 2033 that are movably connected. When the mounting rod 2034 moves, the limiting sleeve rod 2061 and the connecting block 2062 assist in moving. The fixed link 2033 can first convert the pressure into a rotational force. When the fixed link 2033 rotates to the limiting position, the telescopic link 2032 is also driven to rotate a certain angle, and then continues to apply pressure to the fixed link 2033, so that the fixed link 2033 is subjected to a linear movement force, and drives the limiting sleeve rod 2061 to move, so as to avoid the directly connected link from applying an oblique stress to the limiting sleeve rod 2061, resulting in bending and damage of the limiting sleeve rod 2061. The present invention is provided with a telescopic link 2032 and a fixed link 2033 that are movably connected, so as to avoid the limiting sleeve rod 2061 from being subjected to excessively large oblique stress, and reduce the damage probability of the limiting sleeve rod 2061.

[0033] The present invention adopts the telescopic drive 2036 and the connecting rod 2037 of the high-precision cylinder. In the linear distribution state, if it is necessary to adapt to the end polishing of the plum blossom movable contact of different sizes, the telescopic drive 2036 outputs linear motion, and the connecting rod 2037 drives the connecting seat 2038 to move along the hinge point direction of the fixed connecting rod 2033, directly changing the linear distance between the mounting seat 2035 and the connecting seat 2038, and then synchronously adjusting the spacing between adjacent polishing rods 3, while ensuring that the three polishing rods 3 always remain collinear and equidistantly distributed during the translation process, avoiding the processing blind area caused by the fixed spacing of the traditional rigid structure. The present invention combines the telescopic connecting rod 2032 with the spatial positioning function of the mechanical arm 101 with an adjustable length, and can realize the flexible adaptation of the polishing path for the complex surface of the plum blossom movable contact.

[0034] Further, such as Figures 6 to 15As shown, the variable polishing assembly 2 involved in the present invention also includes a fixed seat 204, a third rotation drive 205 and a limit block 208; the fixed seat 204 and the third rotation drive 205 constitute a polishing drive part, the third rotation drive 205 is installed on the fixed seat 204, and the limit block 208 is installed on the fixed seat 204, a stabilizing slot 2081 is opened on one side of the limit block 208, and the top and bottom ends of the entrance of the stabilizing slot 2081 are both installed with guide balls 2082, the fixed connecting rod 2033 is inserted and connected in the stabilizing slot 2081, and the top and bottom ends of the fixed connecting rod 2033 are both opened with ball grooves 2039, the guide balls 2082 are arranged in the ball grooves 2039, and the edge of the ball grooves 2039 is set as an arc surface structure, and the output end of the third rotation drive 205 is connected to the center of the polishing rod 3.

[0035] The present invention provides a stabilizing slot 2081 and a guide ball 2082 on the limit block 208, and provides a corresponding ball groove 2039 on the fixed link 2033. When the fixed link 2033 is rotated and inserted into the stabilizing slot 2081, the guide ball 2082 can cooperate with the ball groove 2039, so that the fixed link 2033 can be smoothly inserted into the limit block 208. The present invention provides corresponding structures on the limit block 208 and the fixed link 2033, so that the fixed link 2033 can be inserted into the limit block 208, so that it is not easy to disengage in the subsequent movement, thereby enhancing the stability of the movement.

[0036] In further, Figure 6 , Figure 7 and Fig.14 As shown, the variable polishing assembly 2 involved in the present invention also includes three elastic tightening structures 207, and the elastic tightening structure 207 includes a sliding frame 2071, an elastic member 2072, and a sliding block 2073; the three sliding frames 2071 are respectively connected to a mounting plate 2031 and two mounting rods 2034, the elastic member 2072 is installed in the sliding frame 2071, the sliding block 2073 is slidably connected in the sliding groove of the sliding frame 2071, and the sliding block 2073 is installed on the elastic member 2072, and the sliding block 2073 is connected to a fixed seat 204.

[0037] The present invention uses three elastic tightening structures 207 to correspond to three polishing rods 3 respectively, and the elastic member 2072 built into the sliding frame 2071 provides an adjustable pre-tightening force. The sliding block 2073 slides in the slide groove of the sliding frame 2071, so that the polishing rod 3 connected to the fixed seat 204 can move along the slide groove direction. When the polishing rod 3 is linearly distributed, the polishing rod 3 polishes the end face of the plum blossom moving contact. When the polishing rod 3 contacts the protruding part of the end face, the sliding block 2073 compresses the elastic member 2072 and moves backward to avoid surface scratches caused by rigid collision; when encountering the concave part of the end face, the elastic member 2072 stretches and pushes the polishing rod 3 to stick to the curved surface. The present invention uses the elastic tightening structure 207 to dynamically compensate for the concave-convex distance when processing the end face of the plum blossom moving contact, ensuring full contact polishing of complex surfaces. Furthermore, Figure 16 to Figure 17 As shown, the upper and lower parts of the polishing rod 3 of the present invention are respectively configured as a brush rod portion 301 and a hair rod portion 302, the surface of the brush rod portion 301 is configured as bristles, and the surface of the hair rod portion 302 is configured as a fiber hair layer.

[0038] The bottom end of the polishing rod 3 is set as a polishing head 303, and the surface of the polishing head 303 is set as an arc surface. The surface of the arc surface is provided with a plurality of radially distributed radial grooves 3031 along the center point, and the surface of the arc surface is provided with a plurality of concentrically distributed annular grooves 3032 along the center point, and the annular grooves 3032 are connected with the radial grooves 3031.

[0039] The present invention designs the polishing rod 3 into a brush rod portion 301 and a hair rod portion 302 which are divided into upper and lower sections. The brush rod portion 301 uses nylon bristles or metal wire bristles with high hardness, which are closely arranged to form a rigid polishing surface, which is suitable for polishing the stainless steel bracket of the plum blossom moving contact and can quickly correct the surface roughness. The hair rod portion 302 is covered with a soft fiber hair layer such as ultra-fine polypropylene or wool fiber, and its fluffy structure can store polishing paste and form a flexible polishing surface, which is suitable for fine polishing of the silver-plated contact of the plum blossom moving contact to avoid surface scratches of the silver-plated contact caused by hard contact. The present invention uses a segmented design to enable a single polishing rod 3 to have dual processing effects, and can automatically match the polishing mode for different parts of the plum blossom moving contact without changing tools during the production process.

[0040] The present invention can fit the inner bottom surface of the columnar static contact through the arc surface design of the polishing head 303, and the radially distributed radial grooves 3031, like diversion channels, quickly transport the polishing agent to all parts of the arc surface, so that the contact surface is evenly contacted with the polishing agent, and the polishing efficiency is improved. The concentrically distributed annular grooves 3032 can not only store more polishing agent, but also cooperate with the radial grooves 3031 to form an efficient polishing agent flow network. During the polishing process, the network can take away the grinding chips in time to avoid the accumulation of grinding chips affecting the polishing quality. At the same time, the annular grooves 3032 and the radial grooves 3031 increase the friction between the polishing head 303 and the contact surface. The present invention makes the polishing efficiency higher and effectively improves the polishing quality of the contact through the structural design of the polishing head 303.

[0041] like Figures 1 to 17 As shown, the present invention relates to a processing method of a processing device for vacuum circuit breaker accessories, comprising the following steps; S1. Equipment preparation and commissioning: Check whether the connections between the polishing workbench 1 and the components of the robot arm 101 are firm, ensure that the robot arm 101 moves flexibly without jamming, and conduct power-on ventilation tests on the first rotary drive 201, the second rotary drive 2022, the third rotary drive 205, and the telescopic drive 2036 to check whether they are operating normally and whether the parameter settings meet the preset requirements.

[0042] According to the specifications and dimensions of the columnar static contacts and plum blossom moving contacts of the vacuum circuit breaker to be processed, the position of the screw block 2026 is precisely controlled by adjusting the rotation angle of the second rotary drive 2022 in the telescopic drive structure 202, and then the distribution form of the three polishing rods 3 in the variable polishing assembly 2 in the initial state is preliminarily set.

[0043] Apply an appropriate amount of corresponding polishing paste evenly on the brush rod part 301 and the bristle rod part 302 of the polishing rod 3, and select an appropriate metal polishing paste according to the stainless steel polishing requirements of the brush rod part 301; for fine polishing of the silver-plated contacts of the bristle rod part 302, apply a special silver polishing paste, and inject a sufficient amount of universal polishing agent into the radial groove 3031 and the annular groove 3032 of the polishing head 303 to ensure a continuous and sufficient supply of polishing media during the polishing process.

[0044] S2. Polishing process of cylindrical static contact: The columnar static contact to be polished is accurately placed in a preset positioning fixture on the polishing workbench 1 to ensure that the central axis of the columnar static contact coincides with the rotational central axis of the variable polishing assembly 2 .

[0045] Start the telescopic drive structure 202 and the connecting rod drive structure 203 of the variable polishing component 2, the second rotary drive 2022 drives the transmission wheel 2023 to rotate, and the screw 2025 is rotated through the transmission belt 2024, driving the screw block 2026 to move forward linearly along the guide rod 2028. During this process, the connecting rod drive structure 203 operates, and the telescopic connecting rod 2032 pushes the fixed connecting rod 2033 to rotate around the mounting rod 2034, so that the three polishing rods 3 are gradually expanded from the initial linear arrangement to an equilateral triangle distribution until the preset triangular distribution state is reached.

[0046] The first rotary drive 201 is turned on, and a high-precision servo motor is used to drive the triangularly distributed variable polishing assembly 2 to rotate around the center point. At the same time, the three polishing drive parts composed of the fixed seat 204 and the third rotary drive 205 start working, and the third rotary drive 205 drives the polishing rod 3 to rotate at high speed around its own axis. At this time, the polishing head 303 on the polishing rod 3 performs all-round polishing of the inner and outer walls of the columnar static contact with the composite motion. During the polishing process, the radial grooves 3031 on the arc surface of the polishing head 303 quickly transport the polishing agent to various places on the inner wall of the columnar static contact, and the concentrically distributed annular grooves 3032 store and assist in transporting the polishing agent. The two cooperate to take away the grinding chips in time, ensure the polishing quality, effectively remove the defects at the bottom of the inner wall of the columnar static contact, and improve its finish.

[0047] After polishing is completed, the first rotation drive 201 and the three polishing drive parts are turned off, and the variable polishing assembly 2 is restored to a linear distribution state through the telescopic drive structure 202 and the connecting rod drive structure 203.

[0048] S3, Plum blossom moving contact polishing process: The variable polishing assembly 2 that has completed the polishing process of the columnar static contact is adjusted to above the processing station of the plum blossom movable contact. The posture of the linearly distributed variable polishing assembly 2 is flexibly adjusted by the mechanical arm 101 to make it perpendicular to the horizontal plane.

[0049] To polish the silver-plated contact piece on the side of the plum blossom moving contact, start the three polishing drive parts, and the third rotary drive 205 drives the polishing rod 3 to rotate around its own axis. At this time, the polishing paste carried by the fiber wool layer covering the surface of the wool rod part 302 finely polishes the surface of the silver-plated contact piece. Since the silver-plated contact piece is soft in texture, the flexible polishing surface of the wool rod part 302 can effectively avoid scratching it. During the polishing process, the elastic tightening structure 207 plays a role. When the polishing rod 3 contacts the concave and convex parts of the surface of the silver-plated contact piece, the sliding block 2073 slides in the sliding frame 2071, and dynamic compensation is performed through the compression and extension of the elastic member 2072, ensuring that the polishing rod 3 always fits closely to the surface of the silver-plated contact piece to achieve full contact polishing.

[0050] After the silver-plated contact pieces on the side of the plum blossom moving contact are polished, the variable polishing assembly 2 is adjusted through the mechanical arm 101 to be parallel to the horizontal plane. At this time, the brush rod 301 faces the stainless steel bracket on the end face of the plum blossom moving contact. The three polishing drive parts are started again, and the nylon bristles or metal wire bristles with higher surface hardness of the brush rod 301 polish the surface of the stainless steel bracket, quickly correct the surface roughness, and improve the flatness and finish of the stainless steel bracket. During the polishing process, the elastic tightening structure 207 is also used to achieve full contact polishing.

[0051] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A processing device for vacuum circuit breaker accessories, characterized in that: It includes a polishing workbench provided with a mechanical arm and a variable polishing assembly connected to the mechanical arm through a first rotation drive; The variable polishing assembly has a triangular distribution state and a linear distribution state, and the variable polishing assembly includes three polishing drive parts, the polishing drive parts are connected to polishing rods, and the polishing drive parts are used to drive the polishing rods to rotate along the axis; In the triangular distribution state, the variable polishing assembly distributes the three polishing rods in an equilateral triangle shape on the horizontal plane through the three polishing parts, the first rotation drive causes the three triangularly distributed polishing rods to rotate around the center point, and the polishing drive part works to polish the inner wall and the outer wall of the columnar static contact; In the linear distribution state, the variable polishing assembly uses three polishing parts to make three polishing rods linearly distributed on the horizontal plane, the mechanical arm makes the linearly distributed polishing parts perpendicular or parallel to the horizontal plane, and the polishing drive part works to polish the end face and side face of the plum blossom moving contact.

2. A processing device for vacuum circuit breaker accessories according to claim 1, characterized in that: The variable polishing assembly further comprises a telescopic drive structure, wherein the telescopic drive structure comprises a mounting frame, a second rotary drive, a transmission wheel, a transmission belt, a screw rod, and a screw block; The mounting frame is mounted on the output end of the first rotary drive, the second rotary drive is mounted on the top of the mounting frame, the transmission wheel is mounted on the output end of the second rotary drive, the transmission wheel is connected to another transmission wheel through a transmission belt, the screw is mounted on another transmission wheel, and both ends of the screw are rotatably connected to the mounting frame, and the screw block is threadedly connected to the screw.

3. A processing device for vacuum circuit breaker accessories according to claim 2, characterized in that: The telescopic driving structure also includes a guide block and a guide rod; The guide block is installed on the screw block, the guide block is slidably connected to the guide rod, and the guide rod is installed on the installation frame.

4. A processing device for vacuum circuit breaker accessories according to claim 2, characterized in that: The variable polishing assembly also includes a connecting rod driving structure, and the connecting rod driving structure includes a mounting plate, a telescopic connecting rod, a fixed connecting rod, and a mounting rod; The mounting plate is mounted on the screw block, the two telescopic connecting rods are rotatably connected to the two sides of the mounting plate respectively, the other end of the telescopic connecting rod is rotatably connected to the fixed connecting rod, and the fixed connecting rod is rotatably connected to the mounting rod.

5. A processing device for vacuum circuit breaker accessories according to claim 4, characterized in that: The telescopic connecting rod comprises a mounting seat, a telescopic drive, a connecting rod, and a connecting seat; The mounting seat is rotatably connected to the mounting plate, the telescopic drive is mounted on the mounting seat, the connecting rod is mounted on the output end of the telescopic drive, the connecting seat is mounted on the other end of the connecting rod, and the connecting seat is rotatably connected to the fixed connecting rod.

6. A processing device for vacuum circuit breaker accessories according to claim 5, characterized in that: The variable polishing assembly also includes a fixed seat, a third rotation drive and a limit block; The fixed seat and the third rotary drive constitute a polishing drive unit, the third rotary drive is mounted on the fixed seat, a limit block is mounted on the fixed seat, a stabilizing slot is provided on one side of the limit block, guide balls are installed at the top and bottom ends of the entrance of the stabilizing slot, the fixed connecting rod is inserted and connected in the stabilizing slot, ball grooves are provided at the top and bottom ends of the fixed connecting rod, the guide balls are arranged in the ball grooves, and the edges of the ball grooves are arranged as arc structures, and the output end of the third rotary drive is connected to the center of the polishing rod.

7. A processing device for vacuum circuit breaker accessories according to claim 6, characterized in that: The variable polishing assembly further comprises a limiting structure, which comprises a limiting sleeve rod and a connecting block; The limiting sleeve rod comprises a plurality of sleeves nested in sequence, the limiting sleeve rod is connected with a mounting frame, the connecting block is mounted on the limiting sleeve rod, and the connecting block is connected with a mounting rod, and the moving track of the limiting sleeve rod is perpendicular to the moving track of the screw block in a horizontal plane.

8. A processing device for vacuum circuit breaker accessories according to claim 7, characterized in that: The variable polishing assembly also includes three elastic tightening structures, and the elastic tightening structures include a sliding frame, an elastic member, and a sliding block; The three sliding frames are respectively connected with a mounting plate and two mounting rods, the elastic member is installed in the sliding frame, the sliding block is slidably connected in the sliding groove of the sliding frame, and the sliding block is installed on the elastic member, and the sliding block is connected with a fixing seat.

9. A processing device for vacuum circuit breaker accessories according to claim 8, characterized in that: The upper part and the lower part of the polishing rod are respectively configured as a brush rod part and a hair rod part, the surface of the brush rod part is configured as bristles, and the surface of the hair rod part is configured as a fiber hair layer.

10. A processing device for vacuum circuit breaker accessories according to claim 9, characterized in that: The bottom end of the polishing rod is set as a polishing head, the surface of the polishing head is set as an arc surface, the surface of the arc surface is provided with a plurality of radially distributed radial grooves along the center point, the surface of the arc surface is provided with a plurality of concentrically distributed annular grooves along the center point, and the annular grooves are connected with the radial grooves.

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