A secondary positioning device for the front ring of a wind wheel assembly before assembly

Abstract

The present invention discloses a secondary positioning device for the front ring of a wind wheel assembly, which relates to the field of automation equipment and is used to adjust and position the position of the front ring of the wind wheel and the shaft sleeve. The device includes: a positioning base; a front ring fixing frame, which is arranged on the positioning base and has an annular structure; a material clamping structure, which is arranged on the outer periphery of the front ring fixing frame, the material clamping structure can reciprocate along the radial direction of the front ring fixing frame, and the material clamping structure can limit the separation of the front ring from the front ring fixing frame; a turntable, which is rotatably arranged at the bottom of the front ring fixing frame; a linkage structure, which is arranged on the turntable, the linkage structure includes a fitting block and a plug pin, the fitting block is arranged on the turntable, the fitting block can reciprocate along the radial direction of the front ring fixing frame, the plug pin is elastically arranged on the top of the fitting block and can protrude upward under the elastic action, and the plug pin can be inserted into the positioning groove of the front ring; a shaft sleeve fixing frame, which is arranged on the axis of the turntable, and the top of the shaft sleeve fixing frame is used to place the shaft sleeve.

Description

Technical Field

[0001] The present invention belongs to the field of automation equipment, and more specifically, relates to a secondary positioning device for the front ring of a wind wheel assembly. Background Art

[0002] Before assembling the wind wheel, it is necessary to first place the front ring and the shaft sleeve in place. After ensuring that both the relative position and the rotational angle position are correctly adjusted, the wind wheel assembly work can be carried out. However, since the positions of the positioning groove of the front ring and the protrusion of the shaft sleeve are not very obvious, the operator can only determine whether the angle of the front ring and the shaft sleeve is rotated in place through minor differences. Such a loading process requires the operator to be very meticulous, thus prolonging the loading time and increasing the work intensity. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a secondary positioning device for the front ring of a wind wheel assembly. During the 360° rotation of the turntable, the pin of the linkage structure is inserted into the front ring and rotates together with it. After rotating 360°, precise positioning of the front ring and the shaft sleeve is achieved. The operation is simple, fast, and does not require manual operation, reducing the work intensity.

[0004] To achieve the above purpose, the present invention provides a secondary positioning device for the front ring of a wind wheel assembly, which is used to adjust and position the positions of the front ring of the wind wheel and the shaft sleeve. The device includes:

[0005] A positioning base;

[0006] A front ring fixing frame, which is arranged on the positioning base. The front ring fixing frame has an annular structure, and the top of the front ring fixing frame is used to place the front ring;

[0007] A clamping structure, which is arranged on the outer periphery of the front ring fixing frame. The clamping structure can reciprocate along the radial direction of the front ring fixing frame. When the clamping structure approaches the front ring fixing frame, the clamping structure can restrict the separation of the front ring from the front ring fixing frame;

[0008] A turntable, which is rotatably arranged at the bottom of the front ring fixing frame. The center of the turntable is collinear with the axis of the front ring fixing frame;

[0009] A linkage structure, which is arranged on the turntable. The linkage structure includes a fitting block and a pin. The fitting block is arranged on the turntable. The fitting block can reciprocate along the radial direction of the front ring fixing frame. The pin is elastically arranged at the top of the fitting block and can extend upward under the elastic action. The pin can be inserted into the positioning groove of the front ring;

[0010] A shaft sleeve fixing frame, which is arranged on the axis of the turntable. The top of the shaft sleeve fixing frame is used to place the shaft sleeve.

[0011] Optionally, the positioning base is a rectangular plate-like structure, and limiting blocks are respectively arranged at the four corners of the positioning base, and a first groove and a second groove intersecting horizontally and vertically are formed in the middle of the four limiting blocks.

[0012] Optionally, the material clamping structure includes:

[0013] Two material clamping blocks are respectively arranged at both ends of the first groove, and the two material clamping blocks are respectively arranged on both sides of the front ring fixing frame, and the material clamping blocks can reciprocate horizontally along the positioning base;

[0014] A material clamping cylinder is arranged at the end of the positioning base, and the output end of the material clamping cylinder is connected to the material clamping block.

[0015] Optionally, a groove is arranged on one side of the material clamping block close to the front ring fixing frame, and a plurality of trapezoidal bearings are rotatably arranged on the groove, and the trapezoidal bearings are rotationally matched with the outer peripheral contour of the front ring.

[0016] Optionally, a limiting flange is arranged on the outer periphery of the top of the trapezoidal bearing, and the limiting flange can limit the upward movement of the front ring on the front ring fixing frame.

[0017] Optionally, the linkage structure includes:

[0018] A first slide rail is arranged on the turntable, the first slide rail is arranged on the inner side of the front ring fixing frame along the radial direction of the front ring fixing frame, there are two fitting blocks, and the fitting blocks are respectively slidably arranged at both ends of the first slide rail;

[0019] A second slide rail is arranged on the turntable, the second slide rail is perpendicular to the position of the first slide rail, driving blocks are respectively slidably arranged at both ends of the second slide rail, a tension spring is arranged between the two driving blocks, and the driving blocks are connected to the fitting blocks one by one;

[0020] Two single-rod cylinders are respectively arranged at both ends of the positioning base, and the output ends of the single-rod cylinders can drive the fitting blocks to move towards each other on the first slide rail.

[0021] Optionally, a receiving hole is formed in the front ring fixing frame close to the second groove, and the output end of the single-rod cylinder is arranged in the second groove and penetrates through the receiving hole to be in contact and cooperation with the fitting block.

[0022] Optionally, the driving block and the fitting block are connected by a connecting rod, and the connecting rod is arc-shaped.

[0023] Optionally, the bottom of the bushing fixing bracket is a cylinder, the top of the bushing fixing bracket is provided with a bushing positioning groove, a limiting groove is formed on the outer periphery of the bushing positioning groove, and the limiting groove is matched with the bottom of the bushing.

[0024] Optionally, a base bracket is provided at the bottom of the positioning base, a stepping motor is arranged on the base bracket, and the output end of the stepping motor is connected to the turntable.

[0025] The present invention provides a secondary positioning device for the front ring of a wind wheel assembly, and its beneficial effects are as follows:

[0026] 1. Only one stepping motor, one clamping cylinder, two single-rod cylinders and one inductor are used in the positioning device, so that the positioning device has a compact and small structure and does not occupy much space;

[0027] 2. The positioning device can complete the one-time positioning of the front ring and the bushing during the 360° rotation of the turntable, can simultaneously position the relative position relationship between the front ring and the bushing, is convenient for the grasping of the material taking mechanism in the subsequent working station, and has a very high repeat accuracy, thereby improving the positioning accuracy and positioning efficiency of the front ring and the bushing;

[0028] 3. The positioning device is easy to operate and maintain, has a low failure rate after debugging, and runs very stably;

[0029] 4. The positioning device can be used for positioning and loading of different products by replacing the corresponding front ring fixing clamp and bushing fixing clamp according to the change of the product model, and the positioning device has strong versatility.

[0030] Other features and advantages of the present invention will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present invention will become more obvious, wherein, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0032] Figure 1 The structural schematic diagram of a secondary positioning device for the front ring of a wind wheel assembly according to an embodiment of the present invention is shown.

[0033] Figure 2 Shows Figure 1 The top view of

[0034] Figure 3 Shows Figure 1 The front view of

[0035] Figure 4 Shows Figure 1Enlarged view of part A

[0036] Figure 5 The structural schematic diagram of the front ring of a secondary positioning device for the front ring of a wind turbine assembly before assembly according to an embodiment of the present invention is shown.

[0037] Figure 6 The structural schematic diagram of the bushing of a secondary positioning device for the front ring of a wind turbine assembly before assembly according to an embodiment of the present invention is shown.

[0038] Figure 7 Shown is Figure 6 Bottom view of

[0039] Explanation of reference numerals:

[0040] 1, positioning base; 2, front ring fixing frame; 3, turntable; 4, fitting block; 5, pin; 6, bushing fixing frame; 7, limiting block; 8, material clamping block; 9, first groove; 10, trapezoidal bearing; 11, limiting flange; 12, first slide rail; 13, second slide rail; 14, driving block; 15, single rod cylinder; 16, second groove; 17, accommodating hole; 18, connecting rod; 19, limiting groove; 20, base bracket; 21, stepper motor; 22, bushing. Detailed implementation manners

[0041] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be more thorough and complete, and can fully convey the scope of the present invention to those skilled in the art.

[0042] The present invention provides a secondary positioning device for the front ring of a wind turbine assembly, which is used to adjust and position the positions of the front ring of the wind turbine and the bushing. The device includes:

[0043] Positioning base;

[0044] Front ring fixing frame, which is arranged on the positioning base. The front ring fixing frame has an annular structure, and the top of the front ring fixing frame is used to place the front ring;

[0045] Material clamping structure, which is arranged on the outer periphery of the front ring fixing frame. The material clamping structure can reciprocate along the radial direction of the front ring fixing frame. When the material clamping structure approaches the front ring fixing frame, the material clamping structure can limit the separation of the front ring from the front ring fixing frame;

[0046] Turntable, which is rotatably arranged at the bottom of the front ring fixing frame. The center of the turntable is collinear with the axis of the front ring fixing frame;

[0047] The linkage structure is arranged on the turntable. The linkage structure includes a fitting block and a pin. The fitting block is arranged on the turntable and can reciprocate in the radial direction of the front ring fixing frame. The pin is elastically arranged on the top of the fitting block and can protrude upward under the elastic action. The pin can be inserted into the positioning groove of the front ring;

[0048] The bushing fixing frame is arranged on the axis line of the turntable, and the top of the bushing fixing frame is used to place the bushing.

[0049] Specifically, the positioning device is provided with a front ring fixing frame and a turntable on the positioning base. The turntable is rotatably arranged inside the front ring fixing frame. The material clamping structure is arranged outside the front ring fixing frame. A bushing fixing frame is arranged at the axial center position of the turntable, and a linkage structure is arranged on the outer periphery of the bushing fixing frame. When the bushing is placed on the bushing fixing frame, the bushing is clamped and matched with the bushing fixing frame according to its own shape. In this way, the installation position and angle of the bushing can be determined. When the front ring is placed on the front ring fixing frame, only the relative distance position between the front ring and the bushing can be ensured to be accurate, but the installation angle between the front ring and the bushing cannot be guaranteed to be correct. After the material clamping structure clamps inward, the front ring can be firmly attached to the front ring fixing frame. Next, the pin of the linkage structure is used to find the positioning groove of the front ring by rotating the turntable. When the pin is aligned with the positioning groove of the front ring, the pin can extend upward into the positioning groove under the elastic action, realizing the clamping connection between the linkage structure and the front ring. After the turntable rotates 360°, the linkage structure will drive the front ring to rotate to the correct angular position, ensuring that the distance position and angular position between the front ring and the bushing are completely correct. In this way, the positioning work can be completed. The positioning process is simple and fast, without the operator consuming a lot of energy, reducing the labor intensity.

[0050] The front ring of the fan is a sheet-like structure, the front ring is annular, and two positioning grooves are arranged on the inner circumference of the front ring. The positioning grooves are in the shape of a notch, and the two positioning grooves are at the ends of the front ring in the same radial direction.

[0051] Optionally, the positioning base is a rectangular plate-like structure, and limiting blocks are respectively arranged at the four corners of the positioning base. A first groove and a second groove intersecting horizontally and vertically are formed in the middle of the four limiting blocks.

[0052] Specifically, the positioning base is a rectangular plate-like structure, and the limiting blocks are arranged at the four corners. In this way, a cross-shaped groove is formed in the middle of the positioning base, and the front ring fixing frame, the material clamping structure, the turntable, the linkage structure and the bushing fixing frame are all placed in the groove, thereby reducing the occupied space of the positioning device.

[0053] Optionally, the material clamping structure includes:

[0054] Two material clamping blocks are respectively arranged at both ends of the first groove. The two material clamping blocks are respectively arranged on both sides of the front ring fixing frame, and the material clamping blocks can reciprocate in the horizontal direction of the positioning base;

[0055] The material clamping cylinder is arranged at the end of the positioning base, and the output end of the material clamping cylinder is connected to the material clamping block.

[0056] Specifically, the two feeding blocks of the material clamping structure are respectively arranged at both ends of the first groove. After the front ring is placed on the front ring fixing frame, the two material clamping blocks move towards the middle front ring fixing frame at the same time under the drive of a material clamping cylinder, so that the front ring is exactly fixed directly above the front ring fixing frame, thus ensuring the positional relationship between the front ring and the shaft sleeve.

[0057] Optionally, a groove is arranged on one side of the material clamping block close to the front ring fixing frame, and a plurality of trapezoidal bearings are rotatably arranged on the groove, and the trapezoidal bearings are rotationally matched with the outer peripheral contour of the front ring.

[0058] Specifically, a groove is arranged on one side of the material clamping block close to the front ring fixing frame, and the groove is in conformity with the outer peripheral surface of the front ring. In this way, when the material clamping blocks move closer together, the deformation of the outer peripheral surface of the front ring will not be caused during the limiting process of the front ring by the material clamping blocks; in addition, a plurality of trapezoidal bearings are arranged on the upper part of the edge of the groove. In this way, when the outer periphery of the front ring is clamped by the material clamping blocks, only the trapezoidal bearings are in contact with the outer periphery of the front ring. In this way, after the pin of the linkage structure is engaged with the front ring, it can be ensured that the front ring can still rotate freely under the clamped state of the material clamping blocks, without affecting the adjustment of the installation angle of the front ring.

[0059] Optionally, a limiting flange is arranged on the outer periphery of the top of the trapezoidal bearing, and the limiting flange can limit the upward movement of the front ring on the front ring fixing frame.

[0060] Specifically, in order to improve the operation efficiency of the positioning device, the rotation speed of the turntable will be very fast, so as to ensure that the pin can quickly find the positioning groove of the front ring and drive the front ring to rotate to the correct angular position. In order to prevent the front ring from detaching from the front ring fixing frame when the linkage structure drives the front ring to rotate too fast, a limiting flange is arranged on the trapezoidal bearing, and the limiting flange can limit the upward movement of the front ring to ensure the safety and reliability of the positioning process.

[0061] Optionally, the linkage structure includes:

[0062] The first slide rail is arranged on the turntable. The first slide rail is arranged inside the front ring fixing frame along the radial direction of the front ring fixing frame. There are two fitting blocks, and the fitting blocks are respectively slidably arranged at both ends of the first slide rail;

[0063] The second slide rail is arranged on the turntable. The position of the second slide rail is perpendicular to that of the first slide rail. Driving blocks are respectively slidably arranged at both ends of the second slide rail. A tension spring is arranged between the two driving blocks, and the driving blocks are connected to the fitting blocks one by one;

[0064] Two single-rod cylinders are respectively arranged at two ends of the positioning base, and the output ends of the single-rod cylinders can drive the fitting blocks to move toward each other on the first slide rail.

[0065] Specifically, the linkage structure includes a first slide rail and a second slide rail, and the two slide rails are in a cross structure. A bonding block is slidably arranged on the first slide rail, and a driving block is arranged on the second slide rail. A tension spring is arranged between the two driving blocks. In the natural state of the tension spring, the two driving blocks move toward the center of the turntable. In this way, the two bonding blocks are subject to the linkage effect, and the bonding blocks move toward the outer periphery of the turntable respectively, so that the bonding blocks are bonded to the outer periphery of the front ring fixing frame. Since single-rod cylinders are respectively provided at the ends of the positioning base, when the front ring is to be placed on the front ring fixing frame, the single-rod cylinder will extend to make the two fitting blocks move closer to the center of the turntable, so that the front ring can be laid flat on the front ring fixing frame, and the front ring and the front ring fixing frame will not be misfitted due to the lifting of the pin. Then, after the clamping structure clamps the outer periphery of the front ring, the output end of the single-rod cylinder retracts, and the fitting block fits with the front ring fixing frame under the action of the tension spring, so that the pin can extend into the positioning groove of the front ring when the turntable rotates later.

[0066] Optionally, a receiving hole is provided at a position of the front ring fixing frame close to the second groove, and the output end of the single-rod cylinder is arranged in the second groove and passes through the receiving hole to contact and cooperate with the fitting block.

[0067] Specifically, the single-rod cylinder is arranged at the end of the positioning base, and the output end of the single-rod cylinder is arranged in the second groove. When the turntable stops rotating, the position of the bonding block is exactly at the corresponding position of the second groove, and the output end of the single-rod cylinder can enter the inner side of the front ring fixing frame through the accommodating hole on the side of the front ring fixing frame and abut against the bonding block, so that when the single-rod cylinder is extended, the bonding block is pushed toward the center of the turntable and separated from the inner surface of the front ring fixing frame; when the single-rod cylinder is retracted, the single-rod cylinder is pushed out from the accommodating hole without affecting the normal rotation of the front ring fixing frame.

[0068] Optionally, the driving block and the fitting block are connected via a connecting rod, and the connecting rod is arc-shaped.

[0069] Specifically, a connecting rod is arranged between the driving block and the bonding block. The connecting rod is hinged to the driving block and the bonding block. The connecting rod adopts an arc-shaped structure. In this way, during the force transmission process between the driving block and the bonding block, the uneven force on the connecting rod is reduced, thereby extending the service life of the linkage structure.

[0070] Optionally, the bottom of the shaft sleeve fixing frame is a cylinder, the top of the shaft sleeve fixing frame is provided with a shaft sleeve positioning groove, the outer periphery of the shaft sleeve positioning groove is provided with a limiting groove, and the limiting groove matches the bottom of the shaft sleeve.

[0071] Specifically, the top of the bushing fixing bracket is matched with the bottom shape of the bushing. The bushing positioning groove can position the center position of the bushing and can also position the protruding parts on the outer periphery of the bushing. In this way, the position and rotation angle of the bushing are restricted by the bushing fixing bracket, ensuring that after the turntable rotates 360°, the installation position of the bushing and the front ring is correctly positioned.

[0072] The bushing of the fan is a cylindrical structure. The bushing includes a first cylinder and a second cylinder. The two cylinders are integrally formed, and the axis lines of the two cylinders are collinear. The first cylinder is located at the top of the bushing and has a diameter larger than that of the second cylinder. Two protruding parts are provided on the outer periphery of the second cylinder near one end of the first cylinder. The two protruding parts are arranged in the same radial direction of the second cylinder. When the bushing is installed on the bushing fixing bracket, the bottom surface of the first cylinder is clamped with the upper surface of the groove wall of the bushing positioning groove, the second cylinder extends into the bushing positioning groove, and the two protruding parts are just inserted into the limiting groove, so that the bushing fixing bracket can position the position and rotation angle of the bushing.

[0073] Optionally, a base bracket is provided at the bottom of the positioning base, and a stepper motor is provided on the base bracket. The output end of the stepper motor is connected to the turntable.

[0074] Specifically, the positioning device rotates the turntable through the stepper motor. In order to control the occupied space of the positioning device, a base bracket is provided at the lower part of the positioning base. In this way, the stepper motor is arranged inside the base bracket, which can not only protect the stepper motor to a certain extent, but also reduce the occupied space of the positioning device; in addition, through one stepper motor, the turntable, the linkage structure on the turntable and the bushing fixing bracket can be controlled to rotate synchronously, so as to facilitate the accurate positioning of the front ring and the bushing, making the positioning device compact and small, and convenient for future maintenance.

[0075] Embodiment

[0076] As Figures 1 to 7 shown, the present invention provides a secondary positioning device for the front ring of a wind wheel assembly, which is used to adjust and position the position of the front ring of the wind wheel and the bushing. The device includes:

[0077] A positioning base 1;

[0078] A front ring fixing bracket 2, which is arranged on the positioning base 1. The front ring fixing bracket 2 is in a ring structure, and the top of the front ring fixing bracket 2 is used to place the front ring;

[0079] A material clamping structure, which is arranged on the outer periphery of the front ring fixing bracket 2. The material clamping structure can reciprocate along the radial direction of the front ring fixing bracket 2. When the material clamping structure approaches the front ring fixing bracket 2, the material clamping structure can restrict the separation of the front ring and the front ring fixing bracket 2;

[0080] The turntable 3 is rotatably arranged at the bottom of the front ring fixing bracket 2, and the center of the turntable 3 is collinear with the axis of the front ring fixing bracket 2;

[0081] The linkage structure is arranged on the turntable 3. The linkage structure includes a fitting block 4 and a plug pin 5. The fitting block 4 is arranged on the turntable 3. The fitting block 4 can reciprocate in the radial direction of the front ring fixing bracket 2. The plug pin 5 is elastically arranged on the top of the fitting block 4 and can protrude upward under the elastic action. The plug pin 5 can be inserted into the positioning groove of the front ring;

[0082] The bushing fixing bracket 6 is arranged on the axis of the turntable 3, and the top of the bushing fixing bracket 6 is used for placing the bushing.

[0083] In this embodiment, the positioning base 1 is a rectangular plate-like structure. Limiting blocks 7 are respectively arranged at the four corners of the positioning base 1, and a first groove 9 and a second groove that intersect horizontally and vertically are formed in the middle of the four limiting blocks 7.

[0084] In this embodiment, the clamping structure includes:

[0085] Two clamping blocks 8 are respectively arranged at both ends of the first groove 9. The two clamping blocks 8 are respectively arranged on both sides of the front ring fixing bracket 2. The clamping blocks 8 can reciprocate horizontally along the positioning base 1;

[0086] The clamping cylinder is arranged at the end of the positioning base 1, and the output end of the clamping cylinder is connected to the clamping block 8.

[0087] In this embodiment, a groove is arranged on the side of the clamping block 8 close to the front ring fixing bracket 2. A plurality of trapezoidal bearings 10 are rotatably arranged on the groove, and the trapezoidal bearings 10 are rotationally matched with the outer peripheral contour of the front ring.

[0088] In this embodiment, a limiting flange 11 is arranged on the outer periphery of the top of the trapezoidal bearing 10, and the limiting flange 11 can limit the upward movement of the front ring on the front ring fixing bracket 2.

[0089] In this embodiment, the linkage structure includes:

[0090] The first slide rail 12 is arranged on the turntable 3. The first slide rail 12 is arranged inside the front ring fixing bracket 2 along the radial direction of the front ring fixing bracket 2. There are two fitting blocks 4, and the fitting blocks 4 are respectively slidably arranged at both ends of the first slide rail 12;

[0091] The second slide rail 13 is arranged on the turntable 3. The second slide rail 13 is perpendicular to the position of the first slide rail 12. Driving blocks 14 are respectively slidably arranged at both ends of the second slide rail 13. A tension spring is arranged between the two driving blocks 14, and the driving blocks 14 are connected to the fitting blocks 4 one by one;

[0092] Two single-rod cylinders 15 are respectively arranged at both ends of the positioning base 1, and the output ends of the single-rod cylinders 15 can drive the fitting blocks 4 to move towards each other on the first slide rail 12.

[0093] In this embodiment, a receiving hole 17 is provided at a position of the front ring fixing frame 2 close to the second groove 16, and the output end of the single-rod cylinder 15 is arranged in the second groove 16 and penetrates through the receiving hole 17 to be in contact and cooperation with the fitting block 4.

[0094] In this embodiment, the driving block 14 and the fitting block 4 are connected by a connecting rod 18, and the connecting rod 18 is arc-shaped.

[0095] In this embodiment, the bottom of the bushing fixing frame 6 is a cylinder, the top of the bushing fixing frame 6 is provided with a bushing positioning groove, and a limiting groove 19 is provided on the outer periphery of the bushing positioning groove, and the limiting groove is matched with the bottom of the bushing.

[0096] In this embodiment, a base bracket 20 is provided at the bottom of the positioning base 1, a stepping motor 21 is provided on the base bracket 20, and the output end of the stepping motor 21 is connected to the turntable 3.

[0097] In summary, when the positioning device is in use, taking the application of the device on a production line as an example, the production line is equipped with a feeding device for the front ring and the bushing 22. The feeding device can place the front ring on the top of the front ring fixing bracket 2 and can place the bushing 22 on the top of the bushing fixing bracket 6. First, the output ends of the single-rod cylinders 15 at both ends extend outwards, so that the output ends of the single-rod cylinders 15 abut against the fitting blocks 4, causing the two fitting blocks 4 to move towards each other. In this way, the front ring and the bushing 22 can be placed on the front ring fixing bracket 2 and the bushing fixing bracket 6 respectively by the robot gripper. Then, the clamping cylinder is used to make the two clamping blocks 8 move towards each other, so that the clamping blocks 8 can constrain and position the outer circumference of the front ring. Since the trapezoidal bearing 10 is provided on the groove of the clamping block 8, the front ring can still rotate freely, and the limiting flange 11 can prevent the front ring from leaving above the front ring fixing bracket when rotating. Next, the output ends of the single-rod cylinders 15 are retracted, so that the fitting blocks 4 are no longer subjected to the force towards the center of the turntable 3. Under the action of the tension springs between the driving blocks 14, the two driving blocks 14 move towards each other. Then, driven by the connecting rod 18, the two fitting blocks 4 move in opposite directions, so that the fitting blocks 4 can constrain and position the inner side of the front ring. Finally, driven by the stepping motor 21, the turntable drives the linkage structure and the bushing fixing bracket 6 to rotate 360°. When the fitting block 4 rotates to below the positioning groove of the front ring, the pin 5 extends into the positioning groove to achieve clamping, so that the fitting block 4 can drive the front ring to rotate synchronously. In addition, when the bushing positioning groove on the bushing fixing bracket 6 corresponds to the positioning protrusion on the bushing, the bushing fixing bracket 6 can drive the bushing 22 to rotate synchronously. When the turntable rotates one circle, the accurate positioning of the front ring and the bushing can be achieved. Subsequently, the picking device is used to pick up the front ring and the bushing. After the picking device finishes picking up the materials, the single-rod cylinder makes the two fitting blocks 4 move towards each other again, facilitating the next loading operation of the front ring and the bushing.

[0098] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A secondary positioning device for the front ring of a wind wheel assembly, which is used to adjust and position the front ring of the wind wheel and the position of the shaft sleeve, and is characterized in that The device includes: A positioning base; A front ring fixing frame, which is arranged on the positioning base. The front ring fixing frame is of an annular structure, and the top of the front ring fixing frame is used to place the front ring; A material clamping structure, which is arranged on the outer periphery of the front ring fixing frame. The material clamping structure can reciprocate along the radial direction of the front ring fixing frame. When the material clamping structure approaches the front ring fixing frame, the material clamping structure can limit the separation of the front ring from the front ring fixing frame; A turntable, which is rotatably arranged at the bottom of the front ring fixing frame, and the center of the turntable is collinear with the axis of the front ring fixing frame; A linkage structure, which is arranged on the turntable. The linkage structure includes a fitting block and a plug pin. The fitting block is arranged on the turntable, and the fitting block can reciprocate along the radial direction of the front ring fixing frame. The plug pin is elastically arranged on the top of the fitting block and can protrude upward under the elastic action. The plug pin can be inserted into the positioning groove of the front ring; A bushing fixing frame, which is arranged on the axis of the turntable, and the top of the bushing fixing frame is used to place the bushing; The positioning base is of a rectangular plate-like structure, and limiting blocks are respectively arranged at the four corners of the positioning base. A first groove and a second groove that intersect horizontally and vertically are formed in the middle of the four limiting blocks; The linkage structure includes: A first slide rail, which is arranged on the turntable. The first slide rail is arranged on the inner side of the front ring fixing frame along the radial direction of the front ring fixing frame. There are two fitting blocks, and the fitting blocks are respectively slidably arranged at both ends of the first slide rail; A second slide rail, which is arranged on the turntable. The second slide rail is perpendicular to the position of the first slide rail. Driving blocks are respectively slidably arranged at both ends of the second slide rail. A tension spring is arranged between the two driving blocks, and the driving blocks are connected to the fitting blocks one by one; Two single-rod cylinders, which are respectively arranged at both ends of the positioning base. The output end of the single-rod cylinder can drive the fitting block to move towards each other on the first slide rail; A receiving hole is formed at a position of the front ring fixing frame close to the second groove. The output end of the single-rod cylinder is arranged in the second groove and penetrates through the receiving hole to be in contact and cooperation with the fitting block; The driving block and the fitting block are connected by a connecting rod, and the connecting rod is arc-shaped.

2. The secondary positioning device for the front ring of the wind wheel assembly according to claim 1, wherein The material clamping structure includes: Two material clamping blocks, which are respectively arranged at both ends of the first groove. The two material clamping blocks are respectively arranged on both sides of the front ring fixing frame, and the material clamping blocks can reciprocate horizontally along the positioning base; A material clamping cylinder, which is arranged at the end of the positioning base. The output end of the material clamping cylinder is connected to the material clamping block.

3. The secondary positioning device for the front ring of the wind turbine assembly according to claim 2, characterized in that, A groove is formed on one side of the material clamping block close to the front ring fixing frame, and a plurality of trapezoidal bearings are rotatably arranged on the groove. The trapezoidal bearings are rotationally matched with the outer peripheral contour of the front ring.

4. The secondary positioning device for the front ring of the wind wheel assembly according to claim 3, characterized in that, A limiting flange is arranged on the outer periphery of the top of the trapezoidal bearing, and the limiting flange can limit the upward movement of the front ring on the front ring fixing frame.

5. The secondary positioning device for the front ring of the wind wheel assembly according to claim 1, characterized in that, The bottom of the bushing fixing bracket is a cylinder. A bushing positioning groove is provided at the top of the bushing fixing bracket. A limiting groove is opened on the outer periphery of the bushing positioning groove, and the limiting groove is matched with the bottom of the bushing.

6. The secondary positioning device for the front ring of the wind wheel assembly according to claim 1, characterized in that A base bracket is provided at the bottom of the positioning base. A stepping motor is provided on the base bracket, and the output end of the stepping motor is connected to the turntable.

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