Multifunctional sand box for producing wind power gear box casting

Abstract

The invention relates to the technical field of wind power generation, and particularly discloses a multifunctional sand box for wind power gear box casting production, the multifunctional sand box comprises a bottom plate, an upper sand box, a lower sand box and an electric sliding table, the electric sliding table is mounted on the upper surface of the bottom plate, guide columns are mounted at four corners of the bottom of the upper sand box, and the upper sand box and the lower sand box are accurately closed through the guide columns; a shaking mechanism is installed at the top of the electric sliding table, the top of the shaking mechanism is connected with the bottom of the lower sand box through bolts, a support is fixedly connected to the upper surface of the bottom plate, a lifter and a second hydraulic oil cylinder are installed on the left side and the right side of the upper surface of the support correspondingly, and the upper sand box ascends and descends through the output end of the lifter; a grabbing mechanism is installed at the output end of the second hydraulic oil cylinder. The lower sand box shakes for pouring, the liquidity of molten metal is improved, exhausting is smooth, incomplete castings caused by bubbles are prevented, automatic demolding can be achieved, a lower sand box mold cavity is prevented from being damaged, the labor intensity of workers is reduced, and the quality of the castings can be judged.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a multi-functional sand box for the production of wind power gearbox castings. Background Art

[0002] Wind power generation refers to converting the kinetic energy of the wind into mechanical kinetic energy and then into electric kinetic energy. That is, the wind turbine rotates under the action of the wind, converting the kinetic energy of the wind into the mechanical energy of the wind turbine shaft, and the generator rotates to generate electricity driven by the wind turbine shaft. It is an important form of wind energy utilization. The gearbox in a wind power generation unit is an important mechanical component, and its main function is to transmit the power generated by the wind turbine under the action of the wind to the generator and make it obtain the corresponding rotational speed.

[0003] For the casting of the wind power gearbox housing, the upper and lower sand boxes are combined for molding, and the molten metal is poured in. After cooling, the blank of the wind power gearbox housing is taken out of the sand box, and then the wind power gearbox housing is obtained through finish machining.

[0004] Due to the thin wall and long size of the wind power gearbox housing, at the initial stage of pouring, the temperature of the molten metal drops rapidly, and the exhaust space is limited, so bubbles are likely to be generated during the casting process, which will cause casting defects. Moreover, when demolding, if the casting cannot be taken out vertically, the casting will damage the sand box and the sand box needs to be repaired, which is time-consuming and laborious. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-functional sand box for the production of wind power gearbox castings to solve the problems that bubbles are easily generated in the existing casting and the sand box cavity is damaged when taking out the casting.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A multi-functional sand box for the production of wind power gearbox castings, including a bottom plate, an upper sand box, a lower sand box and an electric slide table. The electric slide table is installed on the upper surface of the bottom plate. Guide columns are installed at the four corners of the bottom of the upper sand box, and the upper sand box and the lower sand box are accurately closed through the guide columns. A shaking mechanism is installed on the top of the electric slide table, and the top of the shaking mechanism is connected to the bottom of the lower sand box through bolts. A support is fixedly connected to the upper surface of the bottom plate. An elevator and a second hydraulic cylinder are respectively installed on the left and right sides of the upper surface of the support. The upper sand box is lifted and lowered through the output end of the elevator. A grasping mechanism is installed at the output end of the second hydraulic cylinder, and the casting is vertically taken out of the lower sand box through the grasping mechanism. A display is installed on the right side of the support, and the weight of the workpiece is displayed through the display. The shaking mechanism includes a sliding component, a mounting plate and a driving component. The sliding component is installed at the output end of the electric slide table. The moving end of the sliding component is installed with the lower sand box through the mounting plate. The driving component is installed in the inner cavity of the sliding component, and the driving component is used to drive the moving end of the sliding component to drive the lower sand box to shake.

[0007] Preferably, the driving assembly includes a first motor installed on the right side wall of the sliding assembly. A turntable is installed at the output end of the first motor. A slideway is formed on the side wall of the turntable. One end of a traction rod is installed at the moving end of the sliding assembly, and the other end of the traction rod is installed with a roller slidably connected to the slideway; When the turntable rotates, its horizontal position changes repeatedly, thereby causing the slideway to squeeze the roller left and right, and enabling the traction rod to pull the lower sand box to vibrate left and right.

[0008] Preferably, the turntable is circular in shape and is inclinedly installed at the output end of the first motor.

[0009] Preferably, the grasping mechanism includes a weighing assembly, a clamping assembly, and a second motor. The weighing assembly is installed at the output end of the second hydraulic cylinder. The clamping assembly is installed at the bottom of the weighing assembly. The second motor is installed on the top of the clamping assembly, and the second motor provides operating power to the clamping assembly to enable the clamping assembly to clamp the workpiece.

[0010] Preferably, the weighing assembly includes a substrate. A weighing sensor electrically connected to a display is installed at the center position of the upper surface of the substrate. At least three slide rods are inserted equidistantly along the circumferential direction on the outer edge of the top of the substrate. A pressing plate is installed at the top of the slide rod. Under the condition that the slide rod limits the pressing plate, the pressing plate presses down the weighing sensor, and the weight of the workpiece is measured by the weighing sensor. A dust-proof cover connected to the output end of the second hydraulic cylinder is installed on the outer edge of the upper surface of the substrate; The clamping assembly can pull down the slide rod to make the pressing plate press on the weighing sensor, and calculate the weight of the casting through the change of pressure.

[0011] Preferably, the clamping assembly includes a sleeve installed at the bottom end of the slide rod, and the second motor is installed on the top of the sleeve. Three chutes are formed equidistantly along the circumferential direction on the outer wall of the sleeve. A lead screw is installed at the center line position of the inner cavity of the sleeve through a bearing. The second motor drives the lead screw to rotate clockwise or counterclockwise. Threaded nuts are screwed on the upper and lower ends of the outer wall of the lead screw. One end of a connecting rod is connected to the threaded nut through a pin along the circumferential direction, and the other end of the connecting rod is connected to a clamping plate through a pin. The connecting rod is limited by the chute; By driving the lead screw to rotate clockwise or counterclockwise by the second motor, under the drive of the lead screw, the two threaded nuts move inward or outward simultaneously, and the connecting rod pulls the clamping plate to move outward or inward, realizing gradual clamping and release.

[0012] Preferably, the threads on the upper and lower sides of the lead screw are left-handed and right-handed threads.

[0013] Preferably, the connecting rods on the two threaded nuts are symmetric up and down and have the same length.

[0014] A multifunctional sand box for the production of wind power gearbox castings proposed by the present invention has the beneficial effects that: 1. Improve the quality of castings: By setting up a jitter mechanism in the present invention, the lower sand box generates jitter during the pouring process. When the first motor drives the turntable to rotate, due to the inclined installation of the turntable, the lateral position of its outer edge constantly changes, thereby pulling the sliding seat to drive the left - right jitter of the lower sand box. This kind of jitter effectively improves the fluidity of the molten metal, enables the molten metal to fill the sand box cavity more evenly, reduces the defects caused by poor flow of the molten metal. At the same time, the jitter promotes exhaust, enables the gas in the cavity to be discharged in time, greatly reduces the probability of bubbles in the casting, effectively avoids the incomplete casting caused by bubbles, significantly improves the quality of the castings for wind power gearboxes, and provides high - quality blanks for subsequent finishing.

[0015] 2. Protect the sand box and reduce labor intensity: The grasping mechanism of the present invention can realize the automatic demoulding of the casting. The second motor drives the lead screw to rotate clockwise or counterclockwise. Using the positive and negative threads on both sides of the lead screw, the two lead screw nuts move inward or outward simultaneously, and the clamping plate is pulled by the connecting rod to realize the clamping and release of the casting. During demoulding, it can ensure that the casting is vertically taken out from the lower sand box, avoiding damage to the cavity of the lower sand box caused by improper taking - out method, reducing the workload and cost of sand box repair. Moreover, the automatic demoulding process does not require manual operation, greatly reduces the labor intensity of the staff, improves production efficiency, and makes the production process safer and more efficient.

[0016] 3. Real - time monitor the quality of castings: The present invention is equipped with a weighing component and a display. During the process of the casting being clamped and lifted by the grasping mechanism, the gravity of the casting will pull down the sliding rod, causing the pressing plate to press the weighing sensor. The weighing sensor converts the pressure change into an electrical signal and transmits it to the display to show the weight of the casting. By comparing the standard weight of the casting with the actual measured weight, the operator can quickly judge whether the casting is complete, whether there are internal defects or weight deviations. This function helps to detect unqualified products in time during the production process, avoid waste in subsequent processing, and improve the qualified rate of products and the overall production efficiency. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the lifter; Figure 3 is the structural schematic diagram of the jitter mechanism; Figure 4 is Figure 3 the enlarged view of part A in Figure 5 is the structural schematic diagram of the turntable; Figure 6 is the structural schematic diagram of the grasping mechanism; Figure 7 is the exploded view of the weighing component; Figure 8 It is a schematic structural diagram of a clamping assembly.

[0018] In the figure: 1, bottom plate; 2, upper sand box; 3, lower sand box; 4, electric slide table; 5, shaking mechanism; 6, bracket; 7, lifter; 8, second hydraulic cylinder; 9, grasping mechanism; 10, display; 51, sliding assembly; 52, mounting plate; 53, driving assembly; 511, box body; 512, guide rod; 513, sliding seat; 531, first motor; 532, turntable; 533, slideway; 534, traction rod; 535, roller; 71, first hydraulic cylinder; 72, slider guide rail mechanism; 91, weighing assembly; 92, clamping assembly; 93, second motor; 911, base plate; 912, weighing sensor; 913, slide rod; 914, pressing plate; 915, dust cover; 921, sleeve; 922, chute; 923, lead screw; 924, lead screw nut; 925, connecting rod; 926, clamping plate. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-8 , the present invention provides a technical solution: a multi-functional sand box for the production of wind power gearbox castings, including a bottom plate 1, an upper sand box 2, a lower sand box 3 and an electric slide table 4. The electric slide table 4 is installed on the upper surface of the bottom plate 1. Guide columns are installed at the four corners of the bottom of the upper sand box 2, and the upper sand box 2 and the lower sand box 3 are accurately closed through the guide columns. A shaking mechanism 5 is installed on the top of the electric slide table 4, and the top of the shaking mechanism 5 is connected to the bottom of the lower sand box 3 by bolts. A bracket 6 is fixedly connected to the upper surface of the bottom plate 1. An elevator 7 and a second hydraulic cylinder 8 are respectively installed on the left and right sides of the upper surface of the bracket 6. The upper sand box 2 is lifted and lowered through the output end of the elevator 7. The output end of the second hydraulic cylinder 8 is installed with a grasping mechanism 9, and the casting is vertically taken out of the lower sand box 3 through the grasping mechanism 9. A display 10 is installed on the right side of the bracket 6, and the weight of the workpiece is displayed through the display 10.

[0021] The elevator 7 includes two first hydraulic cylinders 71 installed on the left side of the upper surface of the bracket 6. The output end of the first hydraulic cylinder 71 is installed with a slider guide rail mechanism 72, and the bottom of the slider guide rail mechanism 72 is bolted to the upper sand box 2. The upper sand box 2 and the lower sand box 3 are synchronously moved through the slider guide rail mechanism 72.

[0022] The shaking mechanism 5 includes a sliding component 51, a mounting plate 52, and a driving component 53. The sliding component 51 is installed at the output end of the electric slide 4. The moving end of the sliding component 51 is installed with the lower sand box 3 through the mounting plate 52. The driving component 53 is installed in the inner cavity of the sliding component 51, and the driving component 53 is used to drive the moving end of the sliding component 51 to drive the lower sand box 3 to shake.

[0023] The sliding component 51 includes a box body 511 installed at the output end of the electric slide 4. Two guide rods 512 are horizontally installed on the front and rear sides of the inner cavity of the box body 511. A sliding seat 513 connected to the lower sand box 3 is sleeved on the outer wall of the guide rod 512. Under the support of the guide rod 512, the lower sand box 3 can shake left and right.

[0024] As a preferred solution, further, the driving component 53 includes a first motor 531 installed on the right side wall of the box body 511. A turntable 532 is installed at the output end of the first motor 531. A slideway 533 is opened on the side wall of the turntable 532. One end of a traction rod 534 is installed on the right side wall of the sliding seat 513, and the other end of the traction rod 534 is installed with a roller 535 slidably connected to the slideway 533. By rolling the roller 535, the friction with the slideway 533 is reduced.

[0025] As a preferred solution, further, the turntable 532 is circular in shape and is obliquely installed at the output end of the first motor 531. When the turntable 532 rotates, the lateral position of the intersection of the outer edge of the turntable 532 and the extension line of the traction rod 534 changes. Therefore, the rotation of the turntable 532 can drive the traction rod 534 to shake left and right.

[0026] As a preferred solution, further, the grasping mechanism 9 includes a weighing component 91, a clamping component 92, and a second motor 93. The weighing component 91 is installed at the output end of the second hydraulic cylinder 8. The clamping component 92 is installed at the bottom of the weighing component 91. The second motor 93 is installed on the top of the clamping component 92. The second motor 93 provides operating power to the clamping component 92 to clamp the workpiece by the clamping component 92.

[0027] As a preferred solution, further, the weighing component 91 includes a substrate 911. A weighing sensor 912 electrically connected to the display 10 is installed at the center position of the upper surface of the substrate 911. At least three sliding rods 913 are inserted equidistantly along the circumference at the outer edge of the top of the substrate 911. A pressing plate 914 is installed at the top of the sliding rod 913. Under the condition that the sliding rod 913 limits the pressing plate 914, the pressing plate 914 presses down the weighing sensor 912, and the weight of the workpiece is measured by the weighing sensor 912. A dust cover 915 connected to the output end of the second hydraulic cylinder 8 is installed at the outer edge of the upper surface of the substrate 911.

[0028] As a preferred solution, further, the clamping assembly 92 includes a sleeve 921 installed at the bottom end of the slide bar 913, and the second motor 93 is installed on the top of the sleeve 921. Three chutes 922 are equidistantly arranged along the circumferential direction on the outer wall of the sleeve 921. A lead screw 923 is installed in the middle position of the inner cavity of the sleeve 921 through a bearing. The lead screw 923 is driven by the second motor 93 to rotate clockwise or counterclockwise. Threaded nuts 924 are screwed on both the upper and lower ends of the outer wall of the lead screw 923. One end of a connecting rod 925 is connected to the outer wall of the threaded nut 924 along the circumferential direction through a pin shaft, and the other end of the connecting rod 925 is connected to a clamping plate 926 through a pin shaft. The connecting rod 925 is limited by the chute 922, and anti-slip ridges are arranged on the outer wall of the clamping plate 926 to improve the stability of the clamping plate 926 for clamping the casting.

[0029] As a preferred solution, further, the threads on both the upper and lower sides of the lead screw 923 are reverse threads. When the lead screw 923 rotates clockwise or counterclockwise, the rotational force of the threads of the lead screw 923 drives the two threaded nuts 924 to move inward or outward simultaneously.

[0030] As a preferred solution, further, the connecting rods 925 on the two threaded nuts 924 are symmetrically arranged up and down and have the same length. When the connecting rods 925 move, the clamping plate 926 is always kept vertical.

[0031] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and the specific work is as follows.

[0032] Step 1, the upper sand box 2 is driven to move up and down by the first hydraulic cylinder 71, so that the upper sand box 2 and the lower sand box 3 are closed and opened. Step 2, the turntable 532 is driven to rotate by the first motor 531. Since the turntable itself is inclined, the intersection point of the turntable 532 and the extension line direction of the traction rod 534 changes left and right during rotation. Therefore, as the roller 535 rolls in the slideway 533, the traction rod 534 pulls the slide block 513 to vibrate left and right along the guide rod 512. At this time, the molten metal is injected into the upper sand box 2, and the vibration of the mold cavity can enhance the fluidity of the molten metal and prevent air bubbles from generating in the casting. Step 3, after cooling, the lower sand box 3 is moved to the right below the clamping assembly 92 by the electric slide table 4. The second hydraulic cylinder 8 drives the clamping assembly 92 to extend into the casting from the inside. The second motor 93 drives the lead screw 923 to rotate clockwise. Under the drive of the rotational force of the threads of the lead screw 923, the two threaded nuts 924 move inward simultaneously. The upper and lower connecting rods 925 gradually approach each other, and the connecting rods 925 push the clamping plate 926 outward. The clamping plate 926 supports the casting from the inside, and the casting is vertically lifted from the lower sand box 3 to prevent damage to the mold cavity of the lower sand box 3. Step 4: Pull down the sliding rod 913 under the gravity of the casting, so that the pressing plate 914 presses down the weighing sensor 912. The weighing sensor 912 weighs the casting through the internal pressure change and is displayed on the display 10, and the integrity of the casting is judged by the weight of the casting. Step 5: When putting down the casting, drive the lead screw 923 to rotate counterclockwise through the second motor 93, so that the two lead screw nuts 924 move outward at the same time, and the connecting rod 925 pulls the clamping plate 926 away from the casting to complete the blanking of the casting.

[0033] In summary, the lower sand box 3 of the present invention shakes during pouring, improves the fluidity of the molten metal, has smooth exhaust, prevents bubbles from appearing and causing incomplete castings, can automatically demold, prevents damage to the mold cavity of the lower sand box 3, reduces the labor intensity of workers, and can also judge the quality of the castings.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional sand box for producing wind turbine gearbox castings, comprising a bottom plate (1), an upper sand box (2), a lower sand box (3) and an electric slide (4), wherein the electric slide (4) is mounted on the upper surface of the bottom plate (1), and guide columns are mounted at the four corners of the bottom of the upper sand box (2), so that the upper sand box (2) and the lower sand box (3) can be accurately closed by the guide columns, characterized in that: A shaking mechanism (5) is installed on the top of the electric slide (4), and the top of the shaking mechanism (5) is connected to the bottom of the lower sand box (3) by bolts. A bracket (6) is fixedly connected to the upper surface of the bottom plate (1). A lifter (7) and a second hydraulic cylinder (8) are installed on the left and right sides of the upper surface of the bracket (6), respectively. The upper sand box (2) is raised and lowered through the output end of the lifter (7). A grabbing mechanism (9) is installed on the output end of the second hydraulic cylinder (8). The casting is vertically taken out of the lower sand box (3) through the grabbing mechanism (9). A display (10) is installed on the right side of the bracket (6), and the weight of the workpiece is displayed through the display (10); The shaking mechanism (5) comprises a sliding component (51), a mounting plate (52) and a driving component (53); the sliding component (51) is mounted on the output end of the electric slide (4); the moving end of the sliding component (51) is mounted on the lower sand box (3) via the mounting plate (52); the driving component (53) is mounted in the inner cavity of the sliding component (51); the driving component (53) drives the moving end of the sliding component (51) to cause the lower sand box (3) to shake.

2. The multifunctional sand box for producing wind power gearbox castings according to claim 1, characterized in that: The driving assembly (53) comprises a first motor (531) mounted on the right side wall of the sliding assembly (51); a rotating disk (532) is mounted on the output end of the first motor (531); a slideway (533) is provided on the side wall of the rotating disk (532); one end of a traction rod (534) is mounted on the moving end of the sliding assembly (51); and a roller (535) slidably connected to the slideway (533) is mounted on the other end of the traction rod (534).

3. The multifunctional sand box for producing wind power gearbox castings according to claim 2 is characterized in that: The rotating disk (532) is circular in shape and is installed obliquely at the output end of the first motor (531).

4. The multifunctional sand box for producing wind power gearbox castings according to claim 3 is characterized in that: The gripping mechanism (9) comprises a weighing component (91), a clamping component (92) and a second motor (93); the weighing component (91) is mounted at the output end of the second hydraulic cylinder (8); the clamping component (92) is mounted at the bottom of the weighing component (91); the second motor (93) is mounted at the top of the clamping component (92); the second motor (93) provides operating power to the clamping component (92), so that the clamping component (92) clamps the workpiece.

5. The multifunctional sand box for producing wind power gearbox castings according to claim 4, characterized in that: The weighing assembly (91) comprises a base plate (911), a weighing sensor (912) electrically connected to the display (10) is installed at the center position of the upper surface of the base plate (911), at least three slide bars (913) are inserted at equal intervals along the circumferential direction on the top outer edge of the base plate (911), a pressing plate (914) is installed on the top of the slide bar (913), and when the slide bar (913) limits the pressing plate (914), the pressing plate (914) presses down the weighing sensor (912), and the weight of the workpiece is measured by the weighing sensor (912), and a dust cover (915) connected to the output end of the second hydraulic cylinder (8) is installed on the outer edge of the upper surface of the base plate (911).

6. The multifunctional sand box for producing wind power gearbox castings according to claim 5, characterized in that: The clamping assembly (92) includes a sleeve (921) installed at the bottom end of the slide rod (913), and the second motor (93) is installed on the top of the sleeve (921). The outer wall of the sleeve (921) is provided with three slide grooves (922) equidistantly along the circumferential direction. A lead screw (923) is installed at the center line of the inner cavity of the sleeve (921) through a bearing. The lead screw (923) is driven by the second motor (93) to rotate clockwise or counterclockwise. Lead screw nuts (924) are screwed at both the upper and lower ends of the outer wall of the lead screw (923). The outer wall of the lead screw nut (924) is connected to one end of a connecting rod (925) through a pin shaft along the circumferential direction. The other end of the connecting rod (925) is connected to a clamping plate (926) through a pin shaft. The connecting rod (925) is limited by the slide groove (922).

7. The multifunctional sand box for producing wind power gearbox castings according to claim 6, characterized in that: The threads on the upper and lower sides of the lead screw (923) are positive and negative threads.

8. The multifunctional sand box for producing wind power gearbox castings according to claim 7, characterized in that: The connecting rods (925) located on the two lead screw nuts (924) are symmetrical in vertical direction and have the same length.

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