A secondary positioning mechanism for rear cover of wind wheel

Abstract

A secondary positioning mechanism for a rear cover of a wind wheel, comprising a bracket, a positioning fixture and a clamping claw assembly arranged on the top of the bracket, and a driving device arranged in the bracket; wherein the driving device is drivingly connected to the positioning fixture, the clamping claw assembly is used to clamp the workpiece when the workpiece is placed on the positioning fixture, and the driving device drives the positioning fixture to rotate so that the positioning fixture and the workpiece rotate relative to each other to achieve clamping positioning. The secondary positioning mechanism for the rear cover of a wind wheel involved in the present invention, through the cooperation between the positioning fixture, the clamping claw assembly and the driving device, after the workpiece is placed on the positioning fixture, performs accurate secondary positioning, which helps to improve the product quality of the next process.

Description

Technical Field

[0001] The present invention belongs to the technical field of production line equipment, and more specifically, relates to a secondary positioning mechanism for a rear cover of a wind wheel and a reactor. Background Art

[0002] At present, in the production process of wind turbine products, Figure 1 The rear cover product shown is usually positioned manually, which results in inaccurate positioning and affects the quality of the next step of production. Therefore, it is necessary to use a robot to automatically position it to achieve the purpose of automated production. In the production line process, when the rear cover of the wind wheel product is moved to the next stamping process step by the robot, the positioning problem is often not accurate enough, which leads to deviations in the stamping process or other process. Therefore, a secondary positioning mechanism for the rear cover of the wind wheel is needed to solve the above problem. Summary of the invention

[0003] The purpose of the present invention is to provide a secondary positioning mechanism for a wind wheel rear cover, which can accurately position the wind wheel rear cover.

[0004] In order to achieve the above-mentioned object, the present invention provides a secondary positioning mechanism for a rear cover of a wind wheel, comprising a bracket, a positioning fixture and a clamping claw assembly arranged on the top of the bracket, and a driving device arranged in the bracket; wherein,

[0005] The driving device is connected to the positioning fixture in a driving manner. The clamping jaw assembly is used to clamp the workpiece when the workpiece is placed on the positioning fixture. The driving device drives the positioning fixture to rotate so that the positioning fixture and the workpiece rotate relative to each other to achieve clamping and positioning.

[0006] Preferably, the positioning fixture includes a mounting plate, a plurality of guide posts arranged on the mounting plate and a pair of positioning blocks connected to the top ends of the plurality of guide posts, at least one of the positioning blocks is provided with a positioning pin on the top, and at least one positioning hole is provided on the top of the workpiece, and the positioning fixture and the workpiece can rotate relative to each other so that the positioning pin is engaged with the positioning hole.

[0007] Preferably, the positioning fixture further comprises a positioning center, which is arranged at the center of the mounting plate and is rotatably connected to the mounting plate. When the workpiece is placed on the positioning fixture, the center of the workpiece is positioned by the positioning center.

[0008] The positioning center is conformally adapted to the bottom of the workpiece.

[0009] Preferably, the positioning center includes a connecting shaft and a positioning ring, the connecting shaft is inserted into the mounting plate and is rotatably connected to the mounting plate through a bearing, the bottom of the positioning ring is fixedly connected to the top of the connecting shaft, the top of the positioning ring is provided with a positioning shaft and a positioning groove surrounding the positioning shaft, the bottom of the workpiece sits in the positioning groove and is inserted into the positioning shaft.

[0010] Preferably, the positioning center comprises a central axis, the central axis is rotatably connected to the mounting plate, and a positioning through hole adapted to the central axis is provided at the bottom of the workpiece.

[0011] Preferably, there are four guide columns, which are arranged in pairs at both ends of the mounting plate along the vertical direction, and the positioning blocks are annular. Each positioning block is connected to the top of a pair of guide columns, and the pair of positioning blocks are arranged opposite to each other.

[0012] Preferably, the positioning pins are a pair, the positioning holes on the workpiece are a pair, a groove is provided in the middle of each positioning block, each positioning pin is connected to one of the grooves and protrudes from the top surface of the positioning block, when the workpiece is positioned at the positioning center, the workpiece contacts the positioning pin, and the positioning fixture can rotate under the drive of the driving device to enable the positioning pin to be engaged with the positioning hole.

[0013] Preferably, the clamp assembly comprises a clamp cylinder and a pair of clamp bodies, wherein the clamp cylinder is drivingly connected to the pair of clamp bodies to drive the pair of clamp bodies to move toward or away from each other to clamp or release the workpiece;

[0014] The opposing surfaces of a pair of the clamping jaw bodies are arc-shaped, and a pair of upright posts are arranged on the top surface of each of the clamping jaw bodies. The upright posts protrude from the positioning block so as to clamp the outer edge of the workpiece.

[0015] Preferably, the driving device is a rotary stepper motor, the bracket includes a bottom plate, a top plate and a plurality of support columns connected between the bottom plate and the top plate, the rotary stepper motor is connected to the bottom of the top plate through a motor bracket, and the output shaft of the rotary stepper motor passes through the top plate and is fixedly connected to the mounting plate.

[0016] Preferably, the secondary positioning mechanism of the wind wheel rear cover also includes a sensor and a controller, the sensor is arranged on the motor bracket, a notch is provided on the top plate, the sensor is used to detect the workpiece, and the controller controls the start and stop of the rotary stepping motor and the clamping cylinder according to the signal of the sensor.

[0017] The invention relates to a secondary positioning mechanism for a rear cover of a wind wheel, which has the beneficial effect that, through the cooperation between a positioning fixture, a clamping jaw assembly and a driving device, accurate secondary positioning is performed after the workpiece is placed on the positioning fixture, which helps to improve the product quality of the next process.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0020] Figure 1 The schematic diagram of the structure of the rear cover of the wind wheel is shown;

[0021] Figure 2 A schematic diagram of the structure at a first angle of a secondary positioning mechanism for a rear cover of a wind wheel according to an exemplary embodiment of the present invention is shown;

[0022] Figure 3 A second angle structural schematic diagram of a wind wheel rear cover secondary positioning mechanism according to an exemplary embodiment of the present invention is shown;

[0023] Figure 4 A schematic structural diagram of a positioning fixture in a secondary positioning mechanism for a rear cover of a wind wheel according to an exemplary embodiment of the present invention is shown;

[0024] Figure 5 A top view of a positioning fixture in a secondary positioning mechanism for a rear cover of a wind wheel according to an exemplary embodiment of the present invention is shown;

[0025] Figure 6 Shows Figure 5 A-direction sectional view;

[0026] Figure 7 A schematic structural diagram of a secondary positioning mechanism for a rear cover of a wind wheel according to another exemplary embodiment of the present invention is shown.

[0027] Description of reference numerals:

[0028] 1. Bracket; 11. Bottom plate; 12. Top plate; 121. Notch; 13. Support column; 2. Positioning fixture; 21. Mounting plate; 22. Guide column; 23. Positioning block; 231. Groove; 24. Positioning pin; 25. Positioning center; 251. Connecting shaft; 252. Positioning ring; 253. Positioning shaft; 254. Positioning groove; 255. Center shaft; 26. Bearing; 3. Gripper assembly; 31. Gripper cylinder; 32. Gripper body; 33. Column; 34. Cylinder fixing plate; 4. Workpiece; 41. Positioning hole; 5. Driving device; 51. Motor bracket. DETAILED DESCRIPTION

[0029] 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 to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In order to solve the problems existing in the prior art, the present invention provides a secondary positioning mechanism for the rear cover of a wind wheel, such as Figures 1 to 7 As shown, it includes a bracket 1, a positioning fixture 2 and a clamping jaw assembly 3 arranged on the top of the bracket 1, and a driving device 5 arranged in the bracket 1; wherein,

[0032] The driving device 5 is connected to the positioning fixture 2. The clamping jaw assembly 3 is used to clamp the workpiece 4 when the workpiece 4 is placed on the positioning fixture 2. The driving device 5 drives the positioning fixture 2 to rotate so that the positioning fixture 2 and the workpiece 4 rotate relative to each other to achieve clamping and positioning.

[0033] The wind wheel rear cover secondary positioning mechanism involved in the present invention cooperates with the positioning fixture, the clamping jaw assembly and the driving device to perform accurate secondary positioning after the workpiece is placed on the positioning fixture, which helps to improve the product quality of the next process.

[0034] The driving device 5 can drive the positioning fixture 2 to realize 360° automatic rotation and positioning, so as to quickly and accurately position the workpiece 4 such as the back cover type, and the positioning fixture 2 of different specifications can be replaced to achieve universality and strong versatility.

[0035] The present application is described in detail below by taking the rear cover of the wind wheel as the workpiece 4 as an example.

[0036] The positioning fixture 2 includes a mounting plate 21, a plurality of guide posts 22 arranged on the mounting plate 21, and a pair of positioning blocks 23 connected to the top ends of the plurality of guide posts 22. A positioning pin 24 is provided on the top of at least one positioning block 23, and at least one positioning hole 41 is provided on the top of the workpiece 4. The positioning fixture 2 and the workpiece 4 can rotate relative to each other so that the positioning pin 24 is engaged with the positioning hole 41.

[0037] The guide column 22 is used to axially guide the workpiece 4. In one embodiment of the present application, there are four guide columns 22, and they are arranged in pairs at both ends of the mounting plate 21 along the vertical direction. The positioning blocks 23 are annular, and each positioning block 23 is connected to the top of a pair of guide columns 22. The pair of positioning blocks 23 are arranged opposite to each other so that the workpiece 4 can be lowered along the guide columns 22 and the positioning blocks 23.

[0038] In one embodiment of the present application, there is a pair of positioning pins 24, and there is a pair of positioning holes 41 on the workpiece 4. A groove 231 is provided in the middle of each positioning block 23. Each positioning pin 24 is connected to a groove 231 and protrudes from the top surface of the positioning block 23. When the workpiece 4 is positioned at the positioning center 25, the workpiece 4 contacts the positioning pin 24. The positioning fixture 2 rotates under the drive of the driving device 5 to enable the positioning pin 24 to be engaged with the positioning hole 41.

[0039] like Figure 5 and Figure 6 As shown, the positioning pin 24 penetrates the positioning block 23 from bottom to top, and passes through the top of the positioning block 23 and is fixed by a nut. Preferably, the positioning pin 24 is a spring positioning pin.

[0040] The driving device 5 drives the positioning fixture 2 to rotate. The workpiece 4 is placed on the positioning fixture 2 and is clamped by the clamping jaw assembly 3 and subjected to the friction force, thereby forming a relative rotation with the positioning fixture 2 until each positioning pin 24 is engaged in a positioning hole 41 to complete the secondary positioning.

[0041] The positioning fixture 2 also includes a positioning center 25, which is disposed at the center of the mounting plate 21 and is rotatably connected to the mounting plate 21. When the workpiece 4 is placed on the positioning fixture 2, the center of the workpiece 4 is positioned by the positioning center 25.

[0042] The positioning center 25 is adapted to the bottom of the workpiece 4 in a form-fitting manner.

[0043] For example, a rotating workpiece 4 such as a back cover usually has a flange on the top, a positioning hole 41 is set on the flange, and a through hole is set on the bottom. The workpiece 4 is directly positioned for the first time when it is transported and placed by the robot through the positioning center 25, and the workpiece 4 is positioned for the second time through the positioning mechanism, so that the workpiece 4 can be accurately positioned. A positioning center mounting hole can be set in the middle of the mounting plate 21, and the positioning center 25 is fixed in the mounting hole. By replacing positioning fixtures 2 of different specifications, different types of workpieces 4 can be positioned.

[0044] In one embodiment of the present application, Figures 2 to 6 As shown, the positioning center 25 includes a connecting shaft 251 and a positioning ring 252. The connecting shaft 251 is plugged into the mounting plate 21 and is rotatably connected to the mounting plate 21 through a bearing 26. The bottom of the positioning ring 252 is fixedly connected to the top of the connecting shaft 251.

[0045] A positioning shaft 253 and a positioning groove 254 surrounding the positioning shaft 253 are provided on the top of the positioning ring 252 . The bottom of the workpiece 4 is seated in the positioning groove 254 and plugged into the positioning shaft 253 .

[0046] In another embodiment of the present application, Figure 7 As shown, the positioning center 25 includes a central axis 255 , which is rotatably connected to the center of the mounting plate 21 through a bearing, and a positioning through hole adapted to the spring central axis 255 is provided at the bottom of the workpiece 4 .

[0047] The clamp assembly 3 includes a clamp cylinder 31 and a pair of clamp bodies 32. The clamp cylinder 31 is driven and connected to the pair of clamp bodies 32 to drive the pair of clamp bodies 32 to move toward or away from each other to clamp or release the workpiece 4.

[0048] The opposing surfaces of the pair of clamp bodies 32 are arc-shaped. A pair of upright posts 33 are disposed on the top surface of each clamp body 32 . The upright posts 33 protrude from the positioning block 23 to clamp the outer edge of the workpiece 4 .

[0049] The driving device 5 is a rotary stepper motor, and the bracket 1 includes a bottom plate 11, a top plate 12 and a plurality of support columns 13 connected between the bottom plate 11 and the top plate 12. The rotary stepper motor is connected to the bottom of the top plate 12 through a motor bracket 51, and the output shaft of the rotary stepper motor passes through the top plate 12 and is fixedly connected to the mounting plate 21.

[0050] The secondary positioning mechanism of the rear cover of the wind wheel also includes a sensor and a controller. The sensor is arranged on the motor bracket 51. A notch 121 is arranged on the top plate 12. The sensor is used to detect the workpiece 4. The controller controls the start and stop of the rotary stepping motor and the clamping cylinder 31 according to the signal of the sensor. The sensor can detect whether the workpiece 4 has been placed on the positioning fixture 2 through the light transmitted by the notch 121. The sensor can be a reflective photoelectric sensor, which is an existing product, and the specific structure and working principle are not repeated here.

[0051] The working process of the secondary positioning mechanism of the wind wheel rear cover of the present invention is as follows:

[0052] The manipulator transports the workpiece 4 to the top of the positioning mechanism and drops it along the guide column 22 of the positioning fixture 2 until the workpiece 4 is positioned on the positioning center 25. At this time, the flange of the workpiece 4 presses on the positioning pin 24, the sensor detects the workpiece 4 and transmits the detection signal to the controller, and the controller controls the clamping cylinder 31 to move toward each other so that the column 33 is clamped on the outer edge of the workpiece 4; at the same time, the controller controls the rotary stepping motor to drive the positioning fixture 2 to rotate until the positioning pin 24 is aligned with the positioning hole 41 and automatically pops out and is engaged in the positioning hole 41, completing the secondary positioning.

[0053] This application has a compact and small structure, saves space, has high rear cover positioning accuracy and efficiency, is easy to operate and maintain, has a low failure rate after debugging, is very stable, is easy to replace models, and has strong versatility.

[0054] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A secondary positioning mechanism for a rear cover of a wind wheel, characterized in that: It comprises a support (1), a positioning fixture (2) and a clamping jaw assembly (3) arranged on the top of the support (1), and a driving device (5) arranged in the support (1); wherein: The driving device (5) is drivingly connected to the positioning fixture (2); the clamping jaw assembly (3) is used to clamp the workpiece (4) when the workpiece (4) is placed on the positioning fixture (2); the driving device (5) drives the positioning fixture (2) to rotate, so that the positioning fixture (2) and the workpiece (4) rotate relative to each other to achieve clamping and positioning; The positioning fixture (2) comprises a mounting plate (21), a plurality of guide posts (22) arranged on the mounting plate (21), and a pair of positioning blocks (23) connected to the top ends of the plurality of guide posts (22), a positioning pin (24) being provided at the top of at least one of the positioning blocks (23), and at least one positioning hole (41) being provided at the top of the workpiece (4), and the positioning fixture (2) and the workpiece (4) being capable of relative rotation so that the positioning pin (24) is engaged with the positioning hole (41); The positioning fixture (2) further comprises a positioning center (25), wherein the positioning center (25) is arranged at the center of the mounting plate (21) and is rotatably connected to the mounting plate (21); when the workpiece (4) is placed on the positioning fixture (2), the center of the workpiece (4) is positioned by the positioning center (25); The positioning center (25) is conformally adapted to the bottom of the workpiece (4); The positioning center (25) comprises a connecting shaft (251) and a positioning ring (252); the connecting shaft (251) is plugged into the mounting plate (21) and is rotatably connected to the mounting plate (21) via a bearing (26); the bottom of the positioning ring (252) is fixedly connected to the top of the connecting shaft (251); The top of the positioning ring (252) is provided with a positioning shaft (253) and a positioning groove (254) surrounding the positioning shaft (253); the bottom of the workpiece (4) is seated in the positioning groove (254) and plugged into the positioning shaft (253); The positioning center (25) comprises a central axis (255), the central axis (255) is rotatably connected to the mounting plate (21), and a positioning through hole adapted to the central axis (255) is provided at the bottom of the workpiece (4); There are four guide columns (22), which are arranged in pairs at both ends of the mounting plate (21) in a vertical direction, and the positioning blocks (23) are annular, each of which is connected to the top of a pair of guide columns (22), and the pair of positioning blocks (23) are arranged opposite to each other; The positioning pins (24) are a pair, and the positioning holes (41) on the workpiece (4) are a pair. A groove (231) is provided in the middle of each positioning block (23). Each positioning pin (24) is connected to one of the grooves (231) and protrudes from the top surface of the positioning block (23). When the workpiece (4) is positioned at the positioning center (25), the workpiece (4) contacts the positioning pins (24). The positioning fixture (2) is driven by the driving device (5) to rotate so that the positioning pins (24) are engaged with the positioning holes (41). The clamping jaw assembly (3) comprises a clamping jaw cylinder (31) and a pair of clamping jaw bodies (32), wherein the clamping jaw cylinder (31) is drivingly connected to the pair of clamping jaw bodies (32) to drive the pair of clamping jaw bodies (32) to move toward or away from each other to clamp or release the workpiece (4); The opposing surfaces of a pair of the clamping jaw bodies (32) are arc-shaped, and a pair of upright posts (33) are provided on the top surface of each of the clamping jaw bodies (32). The upright posts (33) protrude from the positioning block (23) so as to clamp the outer edge of the workpiece (4).

2. The secondary positioning mechanism for the rear cover of the wind wheel according to claim 1, characterized in that: The driving device (5) is a rotary stepping motor, the bracket (1) comprises a bottom plate (11), a top plate (12) and a plurality of support columns (13) connected between the bottom plate (11) and the top plate (12), the rotary stepping motor is connected to the bottom of the top plate (12) via a motor bracket (51), and the output shaft of the rotary stepping motor passes through the top plate (12) and is fixedly connected to the mounting plate (21).

3. The secondary positioning mechanism for the rear cover of the wind wheel according to claim 2, characterized in that: It also includes a sensor and a controller, wherein the sensor is arranged on the motor bracket (51), a notch (121) is arranged on the top plate (12), the sensor is used to detect the workpiece (4), and the controller controls the start and stop of the rotary stepping motor and the clamping cylinder (31) according to the signal of the sensor.

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