A quick coupler polishing device for excavators

Abstract

The application discloses a quick connector polishing device of excavator, which comprises a base, a fixing part arranged on the base and used for fixing the connector, a driving part arranged on the base and used for driving the sand belt to move back and forth, a clamping part arranged on the driving part and used for fixing the sand belt, a bending part arranged on the driving part and used for bending the cross section of the sand belt, and a fitting part arranged on the driving part and used for making the sand belt fit the outer cylindrical surface of the connector. In the application, the sand belt is clamped by the semi-annular clamping block, so that the sand belt is stably fixed in the C-shaped mode, the loosening of the sand belt is avoided, the foundation for the mode switching is laid, the folding block and the unfolding block of the bending part are guided by the inclined surface, the C-shaped sand belt can be smoothly switched into the H-shaped mode, the C-shaped sand belt is convenient to wind and initially install, the H-shaped sand belt can be closely fitted to the outer cylindrical surface of the cylinder, the whole polishing of the welding seam is ensured without dead angle, the sand belt is not wrinkled and deviated when switched, the polishing precision is ensured, and the downtime adjustment time is reduced.

Description

Technical Field

[0001] This invention relates to the field of excavator parts production equipment technology, specifically an excavator quick connector grinding device. Background Technology

[0002] The excavator quick connector is a core functional accessory installed on excavators. By quickly switching between different attachments such as buckets, breakers, and log grapples, it can significantly shorten attachment change time and greatly improve the overall operating efficiency of the machine. Welding is one of the key processes in its manufacturing: two steel plates, multiple cylinders, and other irregularly shaped components must be precisely spliced ​​and welded together, and the welded parts must meet strict geometric accuracy requirements. Multiple cylinders must remain parallel to each other and perpendicular to the plane of the two steel plates. However, due to the characteristics of the welding process, defects such as weld beads, bubbles, and slag inclusions are easily generated during welding, resulting in a rough and uneven weld surface at the weld joint, and even weld excess height exceeding the standard. To solve this problem, the weld excess height needs to be specifically ground. This improves the surface forming quality of the weld, meeting subsequent assembly or appearance requirements, and effectively reduces local stress concentration in the weld area, preventing the quick connector from cracking due to stress concentration under high-frequency operating loads, thus ensuring its structural strength and service life.

[0003] Chinese Patent CN115847253B discloses a welding and grinding fixture for quick-change casting connectors in excavators. The fixture includes a table with a clamping assembly. Two symmetrically arranged mounting rods are fixedly mounted on the table. One mounting rod has a drive shaft rotatably mounted coaxially, with a drive wheel extending from the top of the drive shaft and fixedly mounted on it. A guide wheel is rotatably mounted on the other mounting rod. A sanding belt is fitted between the drive wheel and the guide wheel. An adjusting rod for controlling the tension of the sanding belt is slidably mounted on the table, with a guide wheel rotatably mounted on the adjusting rod. This invention, by using mounting rods, a drive shaft, a drive wheel, adjusting rod, and sanding belt, enables linear or full-surface grinding of the quick-connect connector's cylindrical surface and the connection between the quick-connect connector's cylinder and the steel plate, solving the problem in existing technologies where only one point can be ground at a time.

[0004] However, the above-mentioned existing technology has the following shortcomings: the tooling only relies on the drive wheel, guide wheel and adjusting rod to adjust the angle and tension of the sanding belt, and lacks a special shape guidance structure. When grinding the circumferential weld at the connection between the cylinder and the steel plate, the sanding belt is prone to local missed grinding due to poor fit. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding device for excavator quick connectors, which addresses the problem that the tooling relies solely on the drive wheel, guide wheel, and adjusting rod to adjust the angle and tension of the sanding belt, lacks a dedicated shape guidance structure, and is prone to localized missed grinding when grinding the annular weld seam at the connection between the cylinder and the steel plate due to poor fit of the sanding belt.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quick connector grinding device for excavators, comprising: a base, a fixing member for fixing the connector on the base, a driving member for reciprocating movement of a sanding belt on the base, a clamping member for fixing the sanding belt on the driving member, a bending member for bending the cross section of the sanding belt on the driving member, and a fitting member for fitting the sanding belt to fit the outer cylindrical surface of the connector.

[0007] The bending component includes a support component that is slidably connected to the driving component. A connecting rod is threadedly connected to the side end of the support component. A support rod is slidably inserted into the outer circular surface of the connecting rod. A limiting block is fixedly connected to the outer circular surface of the support rod, and the limiting block is located above the connecting rod. A mounting plate is fixedly connected to the top end of the support rod. A folding block and an unfolding block are symmetrically fixedly connected to one side of the mounting plate.

[0008] When the drive unit moves the clamping unit to rewind the sanding belt, the folding block on the mounting plate will exert lateral pressure on the sanding belt, so that the sanding belt will naturally wrap around in a C-shape and be fixed on the clamping unit during the winding process. When the drive unit moves the clamping unit to reverse, the unfolding block will expand the sanding belt from the C-shape to the C-shape along with the clamping unit, and make the sanding belt move closely against the outer cylindrical surface of the connector, so as to achieve the grinding of the weld seam on the outer cylindrical surface.

[0009] As a further embodiment of the present invention: the fixing member includes a mounting plate embedded in the top of the base, and the mounting plate penetrates through the top of the base. An adjustment groove is provided through the top of the mounting plate, and a fixing frame is inserted into the adjustment groove. An upper pressure rod is connected through the top of the fixing frame, and the upper pressure rod is threadedly connected to the fixing frame. A handle is slidably inserted into the top of the upper pressure rod.

[0010] As a further embodiment of the present invention: the driving component includes a guide rail formed on the base, a fixed seat inserted into the side end of the base, a ball embedded in the inner side of the fixed seat, the ball being rotatably connected to the fixed seat, the ball being located inside the guide rail and slidably connected to the guide rail.

[0011] As a further embodiment of the present invention: a support frame is fixedly connected to the top of the fixed base, an adjusting rod is rotatably connected to the top of the fixed base, and the adjusting rod is located inside the support frame. The top of the adjusting rod passes through the support frame. A gear is fixedly connected to the outside of the adjusting rod, and the gear is located inside the support frame. The clamping member is sleeved on the outside of the adjusting rod and slidably connected to the adjusting rod, and the clamping member is located below the gear.

[0012] As a further embodiment of the present invention: two sets of adjusting rods, gears and clamping members are provided, symmetrically distributed inside the support frame, and the two sets of gears are meshed and connected. A motor is fixedly connected to the top of the support frame, and the output end of the motor is fixedly connected to one set of adjusting rods.

[0013] As a further embodiment of the present invention: the clamping member includes a sleeve sleeved on the outside of the adjusting rod, and the sleeve is slidably connected to the adjusting rod. A clamping block one is fixedly connected to the outside of the sleeve. A connecting groove is opened on the outside of the clamping block one. A connecting block is inserted into the connecting groove. A clamping block two is fixedly connected to one end of the connecting block. A screw one is threadedly connected to the outside of the connecting block. One end of the screw one passes through the connecting groove and the clamping block one, and is threadedly connected to the clamping block one.

[0014] As a further embodiment of the present invention: a moving groove is provided through the side end of the support frame, a locking groove is provided through the side end of the support frame, and the locking groove is located on the side of the moving groove. The support member includes a support plate, a sliding block is fixedly connected to one side of the support plate, the sliding block passes through the moving groove and is slidably connected to the moving groove, a screw is connected through the locking groove, and one end of the screw is threadedly connected to the support plate. A slot is provided on the other side of the support plate, and a connecting rod is threadedly connected to the side end of the support plate.

[0015] As a further embodiment of the present invention: the fitting component includes an extension component that inserts into a slot 1. A connecting rod 2 is threadedly connected to the side end of the extension component. A stud is threaded through the outer circular surface of the connecting rod 2. A limiting block 2 is fixedly connected to the top of the stud. A nut is threadedly connected to the outer side of the stud, and the nut is located below the connecting rod 2. The limiting block 2 is located above the connecting rod 2. A support rod 2 is fixedly connected to the top of the limiting block 2. A cutting plate is fixedly connected to the top of the support rod 2. The cutting plate is tangent to the outer circular surface of the cylinder in the connector.

[0016] As a further embodiment of the present invention: the extension component includes an insert plate that is inserted into a slot one, an extension plate is fixedly connected to one end of the insert plate, a slot two is provided on one side of the extension plate, and the connecting rod two is threadedly connected to the side end of the extension plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the combination of multiple sets of radial adjustment grooves of the fixing component and the annular guide rail of the driving component allows the fixing component to flexibly adjust the installation position of the fixing frame according to connectors with different outer diameters. The driving component can move 360 ​​degrees in annular motion along the guide rail. The combination of the two not only expands the adaptability range of the device to connectors of different specifications, but also allows the grinding of multiple cylinders of the same connector to be completed without frequent disassembly and assembly of the connector, greatly improving the operational flexibility. The uniform clamping force formed by the multiple sets of fixing frames of the fixing component and the synchronous movement of the clamping component driven by the meshing of two sets of gears of the driving component ensure that the connector is always centered and the driving component ensures that the tension at both ends of the sanding belt is uniform. The combination of the two can effectively prevent the connector from shifting and the sanding belt from running off-center during the grinding process, significantly improving the accuracy and consistency of weld grinding.

[0019] 2. In this invention, the sanding belt is clamped by a semi-circular clamping block, which makes the sanding belt firmly fixed in a C-shape, preventing the sanding belt from loosening and laying the foundation for shape switching. The folding block and unfolding block of the bent part are guided by the inclined surface, which allows the C-shaped sanding belt to be smoothly switched to the C-shape. The C-shape is convenient for the sanding belt to be rolled up and initially installed, while the C-shape can closely fit the outer circle of the cylinder, ensuring that the weld seam is ground without dead corners. The two work together to ensure that the sanding belt is wrinkle-free and does not shift when switching, ensuring grinding accuracy, reducing downtime for adjustment, and also preventing the sanding belt from being damaged due to sudden shape change, extending its service life and improving work efficiency.

[0020] 3. In this invention, the V-shaped cutting plates distributed in a figure-eight pattern in the bonding component can precisely limit and guide the sanding belt from both sides of the outer circular surface of the cylinder. When the sanding belt reciprocates, it will naturally adhere to the outer circular surface of the cylinder along the V-shaped inclined surface of the cutting plate. This contact method can fully cover the annular weld seam on the outer circular surface of the cylinder. Especially for areas that are easily missed by traditional grinding, such as the arc transition between the weld seam and the steel plate and the top edge of the cylinder, the V-shaped cutting plate can guide the sanding belt to fit precisely, completely eliminating grinding dead corners. At the same time, the circumferential contact makes the contact pressure between the sanding belt and the weld seam uniform, ensuring that the amount of weld seam excess removal is consistent, effectively improving the integrity and accuracy of weld seam grinding, and avoiding the impact on the structural strength of the connector due to local missed grinding or excessive grinding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the fastener structure in this invention;

[0023] Figure 3 This is a schematic diagram of the drive component in this invention;

[0024] Figure 4 This is a schematic diagram of the clamping component in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the bent component in this invention;

[0026] Figure 6 This is a schematic diagram of the bonding component in this invention;

[0027] Figure 7 This is a schematic diagram of the support structure in this invention;

[0028] Figure 8 In this invention Figure 5 A schematic diagram of the structure at point A;

[0029] Figure 9 This is a schematic diagram of the folding block in this invention;

[0030] Figure 10 In this invention Figure 5 A schematic diagram of the structure at point B.

[0031] In the diagram: 1. Base; 2. Fixing component; 21. Mounting plate; 22. Adjustment groove; 23. Fixing frame; 24. Upper pressure rod; 25. Handle; 3. Driving component; 31. Guide rail; 32. Fixing seat; 33. Ball bearing; 34. Support frame; 35. Adjustment rod; 36. Gear; 37. Motor; 4. Clamping component; 41. Sleeve; 42. Clamping block one; 43. Connecting groove; 44. Clamping block two; 45. Connecting block; 46. Screw one; 5. Bending component; 51. Moving groove; 52. Lock 53. Fixed slot; 531. Support plate; 532. Sliding block; 533. Slot 1; 54. Screw 2; 55. Connecting rod 1; 56. Support rod 1; 57. Limiting block 1; 58. Mounting plate; 59. Folding block; 510. Unfolding block; 6. Fitting part; 61. Extension part; 611. Extension plate; 612. Insert plate; 613. Slot 2; 62. Connecting rod 2; 63. Stud; 64. Limiting block 2; 65. Nut; 66. Support rod 2; 67. Cutting plate. Detailed Implementation

[0032] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0034] Reference Figure 1 In this embodiment of the invention, a quick connector grinding device for excavators includes: a base 1, which is composed of a set of frustums and multiple sets of support legs fixedly connected to the bottom of the frustums; a fixing member 2 for fixing the connector is provided on the base 1; a driving member 3 for driving the sanding belt to move back and forth is provided on the base 1; a clamping member 4 for fixing the sanding belt is provided on the driving member 3; a bending member 5 for bending the cross section of the sanding belt is provided on the driving member 3; and a fitting member 6 for fitting the sanding belt to fit the outer cylindrical surface of the connector.

[0035] Reference Figure 2The fixing component 2 includes a mounting plate 21 embedded in the top of the base 1, and the mounting plate 21 extends through the top of the base 1. An adjustment groove 22 is formed through the top of the mounting plate 21. Multiple sets of adjustment grooves 22 are radially and evenly distributed at the top of the mounting plate 21. A fixing bracket 23 is inserted into the adjustment groove 22. The fixing bracket 23 has a U-shaped structure, and its opening width can be adapted to the connector height. A nitrile rubber pad is pasted on the inner side wall of the bracket to increase friction with the connector and prevent damage to the connector surface. The width of the fixing bracket 23 is the same as the width of the adjustment groove 22. An upper pressure rod 24 is threadedly connected to the top of the fixing bracket 23. A circular pressure block is welded to the bottom of the upper pressure rod 24, and a felt pad is pasted on the bottom of the pressure block to prevent damage to the connector. A handle 25 is slidably inserted into the top of the upper pressure rod 24. The handle 25 has a T-shaped structure and can rotate 360 ​​degrees after being inserted into the insertion hole at the top of the upper pressure rod 24. When fixing the excavator connector with the fixing component 2, first hoist the connector to be ground to the center of the mounting plate 21, so that the outer cylindrical surface of the connector is facing the subsequent grinding mechanism. Then, according to the outer diameter of the connector, select several sets of adjustment slots 22 at the top of the mounting plate 21 to form adjustment slots 22. Insert the multiple sets of U-shaped fixing brackets 23 into the selected adjustment slots 22 respectively, and push the fixing brackets 23 until the nitrile rubber pad on its inner side is in contact with the outer cylindrical surface of the connector. Then, hold the T-shaped handle 25 at the top of the upper pressure rod 24 and rotate the handle 25 clockwise. Using the threaded engagement between the upper pressure rod 24 and the fixing bracket 23, the upper pressure rod 24 moves vertically downward along the fixing bracket 23 until the felt pressure block at the bottom of the upper pressure rod 24 contacts the top surface of the connector. Finally, continue to slowly rotate the handle 25 to gradually increase the pressure of the upper pressure rod 24 on the connector through the threaded transmission until the connector can be pushed by hand without any displacement, thus completing the fixing operation of the connector.

[0036] The above solution employs the following: By setting multiple sets of radially distributed adjustment grooves 22 at the top of the mounting plate 21, the installation position of the fixing bracket 23 can be flexibly adjusted according to excavator connectors of different outer diameters, significantly expanding the compatibility range of the fixing component 2. By designing the fixing bracket 23 in a U-shape and attaching a nitrile rubber pad to the inside, the clamping stability of the fixing bracket 23 on the connector can be ensured, and direct friction between the metal frame and the connector surface can be effectively avoided, protecting the connector's appearance from damage. The upper pressure rod 24, combined with the felt pressure block at the bottom and the rotatable soft rubber handle 25 at the top, facilitates precise control of the clamping pressure by the operator, prevents damage to the connector's top surface, and improves hand comfort during operation. By setting multiple sets of fixing brackets 23 and upper pressure rods 24, a uniform clamping force can be formed, ensuring that the connector remains centered during the grinding process, avoiding connector displacement due to uneven force, and improving grinding accuracy.

[0037] Reference Figure 3The driving component 3 includes a guide rail 31 formed on the base 1. The guide rail 31 has an annular groove structure. Multiple sets of guide rails 31 are evenly distributed on the upper and lower surfaces and sides of the outer edge of the truncated cone in the base 1. The inner surfaces of all guide rails 31 are precision ground and coated with high-temperature grease to ensure smooth sliding. A fixing seat 32 is inserted into the side of the base 1. The fixing seat 32 is U-shaped. Multiple sets of balls 33 are embedded in the inner side of the opening of the fixing seat 32. Each set of balls 33 is embedded in a set of guide rails 31 to form a rolling friction pair. The top of the fixing seat 32... A support frame 34 is fixedly connected. The support frame 34 is F-shaped. An adjusting rod 35 is rotatably connected to the top of the fixed base 32, and the adjusting rod 35 is located inside the support frame 34. The bottom end of the adjusting rod 35 has a T-shaped structure and is rotatably connected to the top of the fixed base 32 through a thrust ball bearing. Its top end passes through the through hole of the cross arm of the support frame 34. A gear 36 is fixedly connected to the outside of the adjusting rod 35, and the gear 36 is located inside the support frame 34. A clamping member 4 is sleeved on the outside of the adjusting rod 35 and slidably connected to the adjusting rod 35. Located below gear 36, two sets of adjusting rods 35, gears 36, and clamping members 4 are symmetrically distributed inside the support frame 34, with the two sets of gears 36 meshing together. A motor 37 is fixedly connected to the top of the support frame 34, and the output end of the motor 37 is fixedly connected to one set of adjusting rods 35. When it is necessary to start the drive unit 3 for grinding, first push the fixed seat 32 to move along the annular guide rail 31 so that the drive unit 3 is aligned with the cylinder in the connector to be ground. Then, one end of the sanding belt is passed through the cylinder in the connector to be ground. The sanding belt is positioned so that its grinding surface faces the outer surface of the cylinder. Then, the two ends of the sanding belt are fixed to the two sets of clamping parts 4, making the sanding belt V-shaped. Then, the two sides of the V-shaped sanding belt are squeezed by the fitting parts 6, so that the sanding belt completely wraps around the outer surface of the cylinder, thus making the sanding belt T-shaped. Then, after the motor 37 is started, the motor 37 drives a set of adjusting rods 35 to rotate. Through the meshing transmission of gear 36, the other set of adjusting rods 35 rotates synchronously in the opposite direction. The two sets of clamping parts 4 move in opposite directions along the adjusting rods 35 to achieve the tensioning and winding of the sanding belt.

[0038] The above solution is adopted as follows: By designing the guide rail 31 as multiple sets of annular grooves and distributing them on the upper and lower surfaces and sides of the outer edge of the frustum, and cooperating with the U-shaped fixing seat 32 and multiple sets of rolling balls 33, the drive component 3 can achieve 360-degree annular movement, thereby grinding different cylinders in the same connector. By using the U-shaped fixing seat 32 and setting multiple sets of rolling balls 33 on the inner side of the opening, it can not only ensure the stable connection between the fixing seat 32 and the frustum of the base 1, but also convert sliding friction into rolling friction, reduce movement resistance, and improve adjustment flexibility. By designing the bottom end of the adjusting rod 35 as a T-shape and cooperating with the thrust ball bearing, it can effectively withstand the axial force brought by the clamping component 4 and avoid the adjusting rod 35 from axial movement when under force. By setting two sets of symmetrical adjusting rods 35, gears 36 and clamping components 4 and using meshing transmission, the synchronous movement of the two sets of clamping components 4 is ensured, the tension at both ends of the sanding belt is uniform, and the sanding belt is prevented from running off-center or breaking.

[0039] Reference Figure 4The clamping component 4 includes a sleeve 41 fitted onto the outside of the adjusting rod 35, and the sleeve 41 is slidably connected to the adjusting rod 35. The sleeve 41 has an overall I-shaped structure. A clamping block 42 is fixedly connected to the outside of the sleeve 41. The clamping block 42 is semi-circular in shape, and a connecting groove 43 is provided on the outside of the clamping block 42. The connecting groove 43 is an L-shaped through groove. Two sets of connecting blocks 45 are symmetrically provided at both ends of the outside of the clamping block 42. A set of connecting blocks 45 is inserted into each set of connecting grooves 43. The connecting blocks 45 have a cuboid structure. The two sets of connecting blocks 45 One end is fixedly connected to a clamping block 44, which is semi-circular. Each set of connecting blocks 45 has a screw 46 threadedly connected to its outer side. One end of the screw 46 passes through the connecting groove 43 and the clamping block 42 and is threadedly connected to the clamping block 42. When it is necessary to install the sanding belt onto the clamping part 4, first insert an Allen wrench into the groove of the screw 46 on the outer side of the connecting block 45, and slowly loosen the screw 46 counterclockwise until the screw 46 is completely disengaged from the threaded hole of the clamping block 42. At this time, the connecting block 45 can move along the connecting groove 43. 3. Slide freely, then hold clamping block 2 44 and pull it outwards, so that connecting block 45 slides along the horizontal section of the L-shaped connecting groove 43 of clamping block 1 42 until clamping block 2 44 and clamping block 1 42 are completely separated, forming an open clamping space. Then, wrap one end of the sanding belt to be used with clamping block 2 44 in a C-shape, with the C-shaped opening facing outwards. Next, align the connecting block 45 of clamping block 2 44 with the entrance of the connecting groove 43 of clamping block 1 42 and insert it. Push clamping block 2 44 so that connecting block 45 slides along the connecting groove 43 to the bottom, until... The inner arc of clamping block 2 44 is fully in contact with the surface of the sanding belt, and the sanding belt is clamped between clamping block 1 42 and clamping block 2 44. Since the sanding belt is continuous, the other end needs to be fixed to another set of clamping parts 4. Therefore, one end of the sanding belt is moved out from the gap between a set of connecting grooves 43 and connecting block 45, and the other side is fixed to the connecting block 45 in the connecting groove 43 by screw 1 46, thus completing the fixing of the sanding belt on the clamping parts 4. If the sanding belt needs to be replaced, repeat the above steps of loosening the screw, separating the clamping blocks, removing the old sanding belt, and installing the new sanding belt.

[0040] The above solution is adopted: by designing the connecting groove 43 as an L-shape and setting two sets of symmetrical distribution, the clamping block 44 can be quickly assembled and disassembled along the groove. Compared with the traditional fully enclosed clamping structure, the sanding belt replacement time is shortened and the work efficiency is improved.

[0041] Reference Figures 5 to 9The bending component 5 includes a support component 53 that is slidably connected to the driving component 3. The support component 53 includes a support plate 531. A sliding block 532 is fixedly connected to one side of the support plate 531, and a slot 533 is opened on the other side of the support plate 531. Two sets of locking grooves 52 are opened through the side end of the support frame 34. The two sets of locking grooves 52 are symmetrically distributed on both sides of the moving groove 51. A screw 54 is connected through the groove. The screw end of the screw 54 passes through the locking groove 52 and is threadedly connected to the threaded hole pre-set on the side end of the support plate 531. By tightening the screw 54, the support plate 531 can be fixed at any position in the moving groove 51. The support plate 531 is made of high-strength alloy steel plate, and its own rigidity forms a stable support for the clamping component 4, ensuring... The sanding belt maintains a preset height throughout the grinding process. The sliding block 532 has a T-shaped structure, and its horizontal section width and vertical section thickness can form a clearance fit with the moving groove 51 that runs through the side of the support frame 34. A slot 533 is centrally located on the other side of the support plate 531. The inner wall of the slot 533 has anti-slip texture. A connecting rod 55 is threaded to the side of the support plate 531. There are two sets of connecting rods 55, symmetrically distributed on both sides of the support plate 531. A set of support rods 56 is slidably inserted into the outer surface of each set of connecting rods 55. A limit block 57 is welded to the outer surface of the support rod 56. The limit block 57 is a circular steel plate with a diameter larger than the top diameter of the connecting rod 55 and is horizontally positioned above the connecting rod 55. Above, to prevent support rod 56 from completely detaching from connecting rod 55, a mounting plate 58 is welded to the top of support rod 56. The mounting plate 58 is a rectangular steel plate, with a folding block 59 and an unfolding block 510 symmetrically welded to one side. Both have right-angled triangular cross sections, and the two inclined surfaces are arranged opposite each other. The edges of the inclined surfaces are rounded to avoid scratching the sanding belt. When it is necessary to adjust the grinding height, first loosen screw 54, push support plate 531 to make sliding block 532 slide up and down along moving groove 51. After the height of clamping part 4 is adapted to the outer circle of connector cylinder, tighten screws 54 on both sides to fix support plate 531. Then insert support rod 56 into the preset hole of connecting rod 55 until limit block 57 and connecting rod 55 are aligned. When the folding block 59 and unfolding block 510 are in contact with each other, they are positioned horizontally at the opening of the C-shaped folded sanding belt. The direction of the folding block 59 and unfolding block 510 is adjusted by rotating the support rod 56, so that the folding block 59 fits into the opening of the C-shaped folded sanding belt, and the unfolding block 510 is inserted into the opening of the C-shaped folded sanding belt. During sanding, the drive unit 3 drives the clamping unit 4 to roll up the sanding belt. The inclined surface of the folding block 59 will squeeze the edge of the sanding belt, so that the sanding belt gradually bends into a C-shape and wraps around the clamping unit 4. If it is necessary to unfold the sanding belt, the drive unit 3 drives the clamping unit 4 to reverse, and the inclined surface of the unfolding block 510 will push outward from the inside of the C-shaped sanding belt, so that the sanding belt gradually unfolds into a U-shape and finally fits into the outer cylindrical surface of the connector for sanding.

[0042] The above solution ensures that the support plate 531 does not shift laterally during lifting by the T-shaped sliding block 532 and the moving groove 51, thus improving the overall structural stability. The combination of two sets of locking grooves 52 and screws 54 allows for stable fixing of the support plate 531 at any height, adapting to the grinding requirements of connectors of different specifications. The sliding insertion structure of connecting rod 55 and support rod 56 allows for flexible adjustment of the mounting plate 58, ensuring that the folding block 59 and unfolding block 510 always maintain the optimal working position with the sanding belt. The setting of the limiting block 57 effectively prevents the support rod 56 from accidentally falling off, improving the operational safety of the device. The folding block 59 and unfolding block 510, with their right-angled triangular cross-sections and opposing inclined surfaces, precisely control the bending and unfolding shape of the sanding belt using the guiding effect of the inclined surfaces, ensuring the stability of the C-shaped winding and the C-shaped fitting, and improving the grinding accuracy of the weld.

[0043] Reference Figures 5 to 10The fitting component 6 includes an extension component 61 that mates with slot 533. The extension component 61 includes an extension plate 611, an insertion plate 612, and a second slot 613. The insertion plate 612 is a rectangular steel plate with a diamond-shaped anti-slip texture on its outer surface, which increases the static friction between the insertion plate 612 and the inner wall of slot 533, effectively preventing loosening due to vibration after insertion. The extension plate 611 is welded to one end of the insertion plate 612 at a 90-degree angle. A second slot 613 is centrally located on the side away from the insertion plate 612. The second slot 613 has the same dimensions and depth as slot 533, and its inner wall is also roughened to ensure compatibility. The extension component 61 can be flexibly configured according to the axial length of the connector cylinder, with multiple sets... The extended pieces 61 are connected to the previous set of slots 613 and the next set of insert plates 612 through insertion, meeting the grinding requirements of cylinders of different specifications. In the set of extended pieces 61 away from the support 53, two sets of threaded holes are symmetrically opened on the side end of the extended plate 611. A set of connecting rods 62 are threaded into each set of threaded holes. The connecting rods 62 have through holes opened axially upward. The inner wall of the through holes is polished to allow the studs 63 to pass through. The top of the studs 63 is welded with a limit block 64. The limit block 64 is a circular steel plate that can be tightly locked above the connecting rods 62 to form a mechanical limit and prevent the studs 63 from accidentally falling out of the through holes. The lower end of the studs 63 is threaded with a nut 65. The nut 65 is made of nitrile butadiene. The hexagonal nut of the rubber anti-slip washer, after tightening, can lock the height of the stud 63 through the friction between the washer and the lower surface of the connecting rod 62. The stud 63 is welded to the top of the support rod 66, and the support rod 66 is welded to the top of the cutting plate 67. The cutting plate 67 is a straight steel plate with a V-shaped tip on the side facing the cylinder. The two sets of cutting plates 67 are distributed in a figure-eight pattern. When it is necessary to install the fitting part 6, first align the insert plate 612 of the first set of extension parts 61 with the slot 533 of the support part 53, and slowly push it in horizontally until the end of the insert plate 612 is in contact with the bottom of the slot 533. Then take the second set of extension parts 61 and insert its insert plate 612 into the slot 613 of the first set of extension parts 61. This process is repeated. The extension piece 61 is connected to cover the cylindrical grinding area. Then, the two sets of connecting rods 62 are screwed into the threaded holes of the last extension plate 611. Next, the stud 63 is inserted from the upper end of the through hole of the connecting rod 62, so that the limiting block 64 fits against the upper surface of the connecting rod 62. Then, the nut 65 is put into the lower end of the stud 63 and pre-tightened to a semi-tight state. Then, the position of the two sets of cutting plates 67 is manually adjusted so that the V-shaped tips fit against the two sides of the outer surface of the cylinder. At the same time, the nut 65 is rotated to adjust the height of the stud 63 until the cutting plate 67 is in close contact with the outer surface of the cylinder without obvious gap. At this time, the sanding belt moves in the surrounding area formed by the two sets of cutting plates 67 and the outer surface of the cylinder, realizing the close grinding around the cylinder.

[0044] The above solution, through the diamond-shaped anti-slip texture on the surface of the insert plate 612 and the rough surface of slot 1 533 and slot 2 613, significantly improves the connection stability after splicing multiple sets of extension parts 61, preventing loosening due to vibration during grinding. The modular insertion design of multiple sets of extension parts 61 allows for flexible adjustment of the overall length to accommodate cylinders with different axial dimensions, reducing the equipment's versatility cost. The engagement of studs 63 with nuts 65 equipped with anti-slip washers enables micro-precision cutting of the plate 67 height. The adjustment ensures a tight fit between the V-shaped tip and the outer surface of cylinders of different diameters, improving the fit accuracy of the sanding belt. The mechanical limiting action of the limiting block 64 effectively prevents the stud 63 from falling out of the through hole of the connecting rod 62 during the adjustment process, reducing the risk of component loss and improving operational safety. The cutting plate 67 of the V-shaped tip and the figure-eight distribution design can guide the sanding belt from both sides, allowing the sanding belt to naturally fit the outer surface of the cylinder and form a circumferential contact, ensuring that the weld is ground without dead angles.

[0045] The working principle of this invention is as follows: In use, first, the excavator quick connector to be ground is hoisted to the center of the mounting plate 21 on the base 1. Based on the outer diameter of the connector, several symmetrically distributed adjustment slots 22 are selected from the multiple radial adjustment slots 22 at the top of the mounting plate 21. The fixing bracket 23 is inserted into the selected adjustment slots 22 respectively. The fixing bracket 23 is pushed until its inner nitrile rubber pad is tightly fitted to the outer surface of the connector. The handle 25 at the top of the upper pressure rod 24 is held and rotated clockwise. The upper pressure rod 24 is moved vertically downwards using the threaded engagement. After the bottom felt pressure block contacts the top surface of the connector, the handle 25 is slowly rotated until the connector can be pushed without displacement, thus completing the fixing process. Push the fixed seat 32 so that the ball bearing 33 inside its opening rolls along the annular guide rail 31 of the base 1, driving the support frame 34 to move until the clamping part 4 and the bent part 5 are aligned with the cylinder to be ground. Then, use an Allen wrench to loosen the screw 46 of the clamping part 4, pull the connecting block 45 out along the L-shaped connecting groove 43, so that the clamping block 44 is separated from the clamping block 42. Wrap one end of the sanding belt around the clamping block 44 in a C-shape, then insert the connecting block 45 into the connecting groove 43 and push it to the bottom. Tighten the screw 46 to lock it. Fix the other end of the sanding belt to another set of clamping parts 4 in the same steps. At this time, the sanding belt is V-shaped. Then, loosen the screw 54 on the side of the support frame 34 and push the support plate 53. The T-shaped sliding block 532 of component 1 slides up and down along the moving groove 51. After the height of the clamping component 4 is adapted to the outer surface of the cylinder, tighten the screw 2 54 to fix the support plate 531. Insert the support rod 1 56 into the connecting rod 1 55 until the limiting block 1 57 abuts against the connecting rod 1 55. Rotate the support rod 1 56 to make the folding block 59 fit against the opening of the V-shaped sanding belt. Insert the unfolding block 510 into the inside of the sanding belt opening. Finally, insert the insert plate 612 of the first set of extension components 61 into the slot 1 533 of the support plate 531. If the cylinder is long, the subsequent extension components 61 can be inserted into the previous set through the slot 2 613 until the grinding area is covered. Screw the connecting rod 2 62 into the threaded hole of the last extension plate 611. The column 63 is inserted through the upper end of the through hole of the connecting rod 62, and the nut 65 is put on and pre-tightened. The cutting plate 67 is manually adjusted so that the V-shaped tip fits against both sides of the outer surface of the cylinder. The nut 65 is tightened to lock it. The motor 37 is started. The motor 37 drives a set of adjusting rods 35 to rotate. Through the meshing of the gear 36, the other set of adjusting rods 35 rotates synchronously in the opposite direction. The two sets of clamping parts 4 move towards or in opposite directions along the adjusting rods 35. The sanding belt is rolled up in a C-shape or unfolded in a C-shape under the action of the folding block 59 and the unfolding block 510. At the same time, under the guidance of the cutting plate 67, it fits against the outer surface of the cylinder and grinds back and forth. If other cylinders of the same connector need to be ground, the fixed seat 32 can be pushed to move along the guide rail 31 and the above alignment and grinding steps can be repeated.Through the cooperation of multiple radial adjustment grooves 22 of the fixing component 2 and the annular guide rail 31 of the driving component 3, the fixing component 2 can flexibly adjust the installation position of the fixing frame 23 according to connectors with different outer diameters. The driving component 3 can move 360 ​​degrees in annular motion along the guide rail 31. The combination of the two not only expands the adaptability range of the device to connectors of different specifications, but also allows for the grinding of multiple cylinders of the same connector without frequent disassembly and assembly of the connector, greatly improving operational flexibility. Through the uniform clamping force formed by the multiple fixing frames 23 of the fixing component 2 and the synchronous movement of the clamping component 4 driven by the meshing of the two sets of gears 36 of the driving component 3, the fixing component 2 ensures that the connector is always centered, and the driving component 3 ensures that the tension at both ends of the sanding belt is uniform. The cooperation of the two can effectively prevent the connector from shifting and the sanding belt from running off-center during the grinding process, significantly improving the accuracy and consistency of weld grinding. The sanding belt is clamped by the semi-annular clamping block, so that the sanding belt is firmly fixed in a C-shape, avoiding the sanding belt from loosening, laying the foundation for shape switching. The folding block 59 and unfolding block 510 of the bending component 5, guided by the inclined surface, can make the C-shaped sanding belt flat. The sliding mechanism switches to a C-shape. The C-shape facilitates belt winding and initial installation, while the C-shape tightly conforms to the outer surface of the cylinder, ensuring thorough grinding of the weld without any blind spots. The combination of these two shapes prevents wrinkles and misalignment during belt switching, guaranteeing grinding accuracy, reducing downtime for adjustments, and preventing damage to the belt due to sudden shape changes, thus extending its lifespan and improving work efficiency. The V-shaped cutting plates 67, arranged in a figure-eight pattern within the fitting component 6, precisely limit and guide the belt from both sides of the outer surface of the cylinder. During reciprocating grinding, the belt follows the cutting plates 67... The V-shaped bevel naturally conforms to the outer surface of the cylinder. This contact method can fully cover the circumferential weld seam on the outer surface of the cylinder, especially for areas that are easily missed by traditional grinding, such as the arc transition between the weld seam and the steel plate, and the top edge of the cylinder. The V-shaped cutter 67 can guide the abrasive belt to fit precisely, completely eliminating grinding dead corners. At the same time, the circumferential contact ensures uniform contact pressure between the abrasive belt and the weld seam, ensuring consistent removal of weld excess height, effectively improving the integrity and precision of weld grinding, and avoiding the impact on the structural strength of the connector due to localized missed grinding or over-grinding.

[0046] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for excavator quick connectors, comprising: The base (1) is characterized in that a fixing member (2) for fixing the connector is provided on the base (1), a driving member (3) for driving the sanding belt to move back and forth is provided on the base (1), a clamping member (4) for fixing the sanding belt is provided on the driving member (3), a bending member (5) for bending the cross section of the sanding belt is provided on the driving member (3), and a fitting member (6) for fitting the sanding belt to fit the outer cylindrical surface of the connector is provided on the driving member (3). The bending component (5) includes a support component (53) that is slidably connected to the driving component (3). A connecting rod (55) is threadedly connected to the side end of the support component (53). A support rod (56) is slidably inserted into the outer surface of the connecting rod (55). A limiting block (57) is fixedly connected to the outer surface of the support rod (56), and the limiting block (57) is located above the connecting rod (55). An installation plate (58) is fixedly connected to the top of the support rod (56). A folding block (59) and an unfolding block (510) are symmetrically fixedly connected to one side of the installation plate (58). When the driving component (3) drives the clamping component (4) to rewind the sanding belt, the folding block (59) on the mounting plate (58) will exert lateral pressure on the sanding belt, so that the sanding belt will naturally wrap in a C-shape and be fixed on the clamping component (4) during the winding process. When the driving component (3) drives the clamping component (4) to reverse, the unfolding block (510) will expand the sanding belt from the C-shape to the C-shape along with the clamping component (4), and make the sanding belt closely fit the outer cylindrical surface of the connector to move, thereby achieving the grinding of the weld seam on the outer cylindrical surface.

2. The excavator quick connector grinding device according to claim 1, characterized in that, The fastener (2) includes a mounting plate (21) embedded in the top of the base (1), and the mounting plate (21) penetrates the top of the base (1). An adjustment groove (22) is provided through the top of the mounting plate (21). A fixing frame (23) is inserted into the adjustment groove (22). An upper pressure rod (24) is connected through the top of the fixing frame (23), and the upper pressure rod (24) is threadedly connected to the fixing frame (23). A handle (25) is slidably inserted into the top of the upper pressure rod (24).

3. The excavator quick connector grinding device according to claim 2, characterized in that, The driving component (3) includes a guide rail (31) opened on the base (1), a fixed seat (32) is inserted into the side end of the base (1), a ball (33) is embedded in the inner side of the fixed seat (32), and the ball (33) is rotatably connected to the fixed seat (32). The ball (33) is located in the guide rail (31) and is slidably connected to the guide rail (31).

4. The excavator quick connector grinding device according to claim 3, characterized in that, The top of the fixed base (32) is fixedly connected to a support frame (34), and the top of the fixed base (32) is rotatably connected to an adjusting rod (35). The adjusting rod (35) is located inside the support frame (34), and the top of the adjusting rod (35) passes through the support frame (34). The outside of the adjusting rod (35) is fixedly connected to a gear (36), and the gear (36) is located inside the support frame (34). The clamping member (4) is sleeved on the outside of the adjusting rod (35) and slidably connected to the adjusting rod (35). The clamping member (4) is located below the gear (36).

5. The excavator quick connector grinding device according to claim 4, characterized in that, The adjusting rod (35), gear (36) and clamping member (4) are provided in two sets, symmetrically distributed inside the support frame (34), and the two sets of gears (36) are meshed and connected. The top of the support frame (34) is fixedly connected to a motor (37), and the output end of the motor (37) is fixedly connected to a set of adjusting rods (35).

6. The excavator quick connector grinding device according to claim 5, characterized in that, The clamping component (4) includes a sleeve (41) sleeved on the outside of the adjusting rod (35), and the sleeve (41) is slidably connected to the adjusting rod (35). A clamping block one (42) is fixedly connected to the outside of the sleeve (41). A connecting groove (43) is opened on the outside of the clamping block one (42). A connecting block (45) is inserted into the connecting groove (43). A clamping block two (44) is fixedly connected to one end of the connecting block (45). A screw one (46) is threadedly connected to the outside of the connecting block (45). One end of the screw one (46) passes through the connecting groove (43) and the clamping block one (42) and is threadedly connected to the clamping block one (42).

7. The excavator quick connector grinding device according to claim 6, characterized in that, The support frame (34) has a through-hole moving groove (51) on its side end and a through-hole locking groove (52) on its side end. The locking groove (52) is located on the side of the moving groove (51). The support member (53) includes a support plate (531). A sliding block (532) is fixedly connected to one side of the support plate (531). The sliding block (532) passes through the moving groove (51) and is slidably connected to the moving groove (51). A screw (54) passes through the locking groove (52). One end of the screw (54) is threadedly connected to the support plate (531). A slot (533) is opened on the other side of the support plate (531). A connecting rod (55) is threadedly connected to the side end of the support plate (531).

8. The excavator quick connector grinding device according to claim 7, characterized in that, The fitting component (6) includes an extension component (61) that is inserted into slot one (533). The extension component (61) has a connecting rod two (62) threaded to its side end. A stud (63) is threaded through the outer surface of the connecting rod two (62). A limiting block two (64) is fixedly connected to the top of the stud (63). A nut (65) is threaded to the outside of the stud (63), and the nut (65) is located below the connecting rod two (62). The limiting block two (64) is located above the connecting rod two (62). A support rod two (66) is fixedly connected to the top of the limiting block two (64). A cutting plate (67) is fixedly connected to the top of the support rod two (66). The cutting plate (67) is tangent to the outer surface of the cylinder in the connector.

9. A grinding device for excavator quick connectors according to claim 8, characterized in that, The extension piece (61) includes a plug plate (612) that is inserted into slot one (533). One end of the plug plate (612) is fixedly connected to an extension plate (611). A slot two (613) is provided on one side of the extension plate (611). The connecting rod two (62) is threadedly connected to the side end of the extension plate (611).

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