A welding cage drilling tool

Abstract

The utility model relates to the field of retainer frock technology, especially a kind of welding retainer drilling frock, specifically includes: detachably set with mandrel on base, mandrel is set with main block, main block is axially sliding on mandrel, mandrel top end is provided with driving assembly, driving assembly is used to drive main block axially sliding on mandrel, the top surface of base is provided with at least four linear slide rails, and multiple linear slide rails are evenly distributed along the axis of mandrel, each linear slide rail is provided with slide base, slide base is provided with loading platform, the end of loading platform close to mandrel and connecting rod one end are hinged, the other end of connecting rod and main block are hinged, limiting component is set on the top surface of loading platform. Solve the current most retainer frock's fixed pressing operation step tedious, positioning relies on artificial alignment, centring accuracy is low, and the thin-walled structure of welding retainer is prone to deformation and produce wobble due to uneven pressing force, seriously affect the problem of hole position accuracy.

Description

Technical Field

[0001] This utility model relates to the field of cage tooling technology, and in particular to a drilling tooling for welding cages. Background Technology

[0002] As the global wind power industry develops towards larger scale, higher load, and longer lifespan, the drilling accuracy of the welding cage, a key component of wind turbine bearings, is crucial to the reliability of the bearings.

[0003] However, most cage fixtures currently use traditional methods such as "multiple pressure plates" or "segmented positioning blocks" to fix welded cages for wind turbine bearings. The fixing and tightening process is cumbersome, and the positioning relies on manual alignment, resulting in low centering accuracy. Furthermore, the thin-walled structure of the welded cage is prone to deformation and shaking due to uneven clamping force, which seriously affects the hole position accuracy.

[0004] Therefore, how to provide a drilling fixture for welding cages that simplifies the fixing and clamping operation, aligns the cage mechanically, applies uniform pressure to the thin-walled structure of the welding cage, reduces shaking, and ensures hole position accuracy is a technical problem that urgently needs to be solved. Utility Model Content

[0005] This utility model provides a drilling fixture for welding cages, which solves the problems of cumbersome operation steps for fixing and clamping most current cage fixtures, reliance on manual alignment for positioning, low centering accuracy, and the thin-walled structure of the welding cage being prone to deformation and shaking due to uneven clamping force, which seriously affects the hole position accuracy.

[0006] This utility model provides a drilling fixture for welding cages, comprising: a base, a mandrel detachably mounted on the base, a main block sleeved on the mandrel, the main block sliding axially on the mandrel, a driving assembly at the top of the mandrel for driving the main block to slide axially on the mandrel, at least four linear slide rails on the top surface of the base, and multiple linear slide rails evenly distributed circumferentially along the axis of the mandrel, each linear slide rail having a slide block, and a platform on the slide block, the end of the platform near the mandrel being hinged to one end of a connecting rod, and the other end of the connecting rod being hinged to the main block; A limiting component is disposed on the top surface of the stage. The limiting component is used to center and fix the welding retainer. The limiting component includes an inner limiting ring and an outer limiting ring. The inner limiting ring is disposed on the top surface of the stage, and the outer limiting ring is detachably connected to the inner limiting ring.

[0007] In one possible implementation, a groove is provided at the bottom of the main block, one end of a spring is placed in the groove, the other end of the spring is connected to the top surface of the base, and the spring is sleeved on the outside of the mandrel.

[0008] In one possible implementation, the drive assembly includes a threaded shaft, a top sleeve, a nut, and a rotating wheel. The bottom end of the threaded shaft is connected to the top end of the spindle, and the threaded shaft and the spindle are integrally formed. The top sleeve is fitted over the threaded shaft. The bottom end of the top sleeve abuts against the top surface of the main body block, and the top end of the top sleeve abuts against the bottom surface of the nut. The threaded shaft is screwed to the nut, and the nut is connected to the rotating wheel.

[0009] In one possible implementation, the outer sidewall of the inner limiting ring is symmetrically provided with limiting blocks, and the inner sidewall of the outer limiting ring is symmetrically provided with limiting grooves. The limiting blocks are slidably fitted into the limiting grooves, and the limiting blocks cooperate with the limiting grooves to restrict the outer limiting ring from rotating relative to the inner limiting ring.

[0010] In one possible implementation, a locking washer is provided between the top end of the top sleeve and the bottom surface of the nut, and the locking washer is sleeved outside the threaded shaft.

[0011] In one possible implementation, a connecting frame is screwed to the end of the platform near the mandrel, and a reinforcing block is circumferentially provided on the main body block, corresponding one-to-one with a plurality of connecting frames. Hinge holes are provided at both ends of the connecting frame, the reinforcing block and the connecting rod. Pins are provided in the hinge holes on the connecting frame and the hinge holes at one end of the connecting rod, as well as in the hinge holes on the reinforcing block and the hinge holes at the other end of the connecting rod.

[0012] In one possible implementation, a self-lubricating bushing is provided between the pin and the wall of the hinge hole.

[0013] In one possible implementation, a stepped mounting hole is provided at the center of the base, and a mounting block is provided at the bottom end of the mandrel. When the mandrel is connected to the base, the mandrel passes through the stop of the stepped mounting hole, and the mounting block abuts against the shoulder inside the stepped mounting hole.

[0014] In one possible implementation, the mounting block is provided with a plurality of first positioning holes evenly distributed circumferentially along the axis of the mandrel, and the shoulder is provided with a second positioning hole corresponding to the first positioning hole. The positioning pin passes through the first positioning hole and the second positioning hole to fix the mandrel on the base.

[0015] The beneficial effects of this invention are as follows: First, the welding retainer is placed on the top surface of multiple platforms on the top surface of the base, so that the center position of the welding retainer is as close as possible to the axis of the mandrel. Then, the drive assembly is controlled to move the main body block downwards along the mandrel. The connecting rod is subjected to a downward force, which is transmitted to the platforms. The platforms slide radially on the linear slide rail via the slide block, moving away from the mandrel, causing the limiting components to expand radially. The limiting components on some of the platforms abut against the inner wall of the welding retainer for centering adjustment. Then, the drive assembly is continuously controlled, and the welding retainer moves under force on the top surface of the multiple platforms until the limiting components on all platforms abut against the inner wall of the welding retainer. Finally, the drive assembly is stopped, completing the centering and fixing of the welding retainer. By controlling the radial movement of the main body block on the mandrel through the drive assembly, and through the transmission of the connecting rod, coupled with the linear slide rail and slide block, the position of the limiting components on the platforms is controlled, simplifying the tedious fixing and clamping steps of the tooling for the welding retainer, and replacing manual centering with a mechanical method. Multiple limiting components apply pressure to the inner wall of the welding cage to prevent deformation and shaking, thus ensuring the accuracy of the hole positions. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a drilling fixture for a welding cage according to the present invention. Figure 2 This is a cross-sectional perspective view of a drilling fixture for a welding cage according to the present invention. Figure 3 This is an enlarged perspective view of region A of a welding cage drilling fixture according to the present invention; Figure 4 This is an enlarged perspective view of region B of a welding cage drilling fixture according to the present invention. Figure 5 This is an enlarged perspective view of region C of a welding cage drilling fixture according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Base; 2. Spindle; 3. Main block; 4. Drive assembly; 401. Threaded shaft; 402. Top sleeve; 403. Nut; 404. Rotary wheel; 5. Linear slide rail; 6. Slide block; 7. Platform; 8. Connecting rod; 9. Limiting assembly; 901. Inner limiting ring; 902. Outer limiting ring; 10. Welded retainer; 11. Groove; 12. Spring; 13. Limiting block; 14. Limiting groove; 15. Locking washer; 16. Connecting frame; 17. Reinforcing block; 18. Hinge hole; 19. Pin; 20. Self-lubricating bushing; 21. Stepped mounting hole; 22. Mounting block; 23. Stop; 24. Shoulder; 25. First positioning hole; 26. Second positioning hole; 27. Positioning pin. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] See Figure 1and Figure 2 This utility model provides a drilling fixture for a welding retainer 10, comprising: a base 1 on which a mandrel 2 is detachably mounted; a main body block 3 is sleeved on the mandrel 2; the main body block 3 slides axially on the mandrel 2; a driving assembly 4 is provided at the top of the mandrel 2; the driving assembly 4 is used to drive the main body block 3 to slide axially on the mandrel 2; at least four linear slide rails 5 are provided on the top surface of the base 1, and the multiple linear slide rails 5 are evenly distributed circumferentially along the axis of the mandrel 2; each linear slide rail 5 is equipped with... There is a slide 6, and a platform 7 is provided on the slide 6. The end of the platform 7 near the spindle 2 is hinged to one end of the connecting rod 8, and the other end of the connecting rod 8 is hinged to the main body block 3. A limiting component 9 is provided on the top surface of the platform 7. The limiting component 9 is used to center and fix the welding retainer 10. The limiting component 9 includes a limiting inner ring 901 and a limiting outer ring 902. The limiting inner ring 901 is provided on the top surface of the platform 7, and the limiting outer ring 902 is detachably connected to the limiting inner ring 901.

[0023] Among them, there are two slide blocks 6 on the linear slide rail 5. The top surface of the two slide blocks 6 is connected to the bottom surface of the platform 7. The platform 7 is slidably connected to the linear slide rail 5 through the slide blocks 6. The linear slide rail 5 is fixed to the base 1 by screw connection.

[0024] Specifically, firstly, the welding retainer 10 is placed on the top surface of multiple platforms 7 on the top surface 7 of the base 1, so that the center position of the welding retainer 10 is as close as possible to the axis of the mandrel 2. Then, the control drive assembly 4 drives the main block 3 to move downwards along the mandrel 2. The connecting rod 8 is subjected to a downward force, which is transmitted to the platforms 7. The platforms 7 slide radially on the linear slide rail 5 via the slide block 6, moving away from the mandrel 2, causing the limiting assembly 9 to expand radially. The limiting assemblies 9 on some of the platforms 7 abut against the inner wall of the welding retainer 10 for centering adjustment. Then, the control drive assembly 4 is continuously maintained, and the welding retainer 10 moves under force on the top surface of the multiple platforms 7 until the limiting assemblies 9 on all platforms 7 abut against the inner wall of the welding retainer 10. Finally, the control drive assembly 4 is stopped, completing the centering and fixing of the welding retainer 10. Different specifications of welding retainers 10 can be adapted by replacing different limiting outer rings 902.

[0025] Through the transmission of the connecting rod 8, coupled with the linear slide rail 5 and the slide block 6, the position of the limiting component 9 on the platform 7 is controlled, forming an axial to radial motion transmission mechanism. This ensures the synchronous movement of four or more limiting components 9, applies uniform pressure to the inner wall of the welding retainer 10, prevents deformation, reduces shaking during drilling, and ensures hole position accuracy.

[0026] By aligning the welded cage 10 mechanically, compared to manual operation, there is no need to consider the fluctuations in the hole position accuracy of the welded cage 10 caused by the operator's work experience, thus ensuring the pass rate of the welded cage 10, facilitating subsequent bearing assembly, and improving the service life of the welded cage 10.

[0027] In some embodiments, a groove 11 is provided at the bottom end of the main body block 3, and one end of the spring 12 is placed in the groove 11. The other end of the spring 12 is connected to the top surface of the base 1, and the spring 12 is sleeved on the outside of the spindle 2. Preferably, a fixing seat is provided at the top end of the base 1. The fixing seat is used to accommodate the lower end of the spring 12. The fixing seat is sleeved on the outside of the spindle 2, and the fixing seat makes the compression and reset of the spring 12 more stable.

[0028] When the drive assembly 4 controls the main block 3 to move downwards along the spindle 2 to center and fix the welding retainer 10, the spring 12 is compressed by the main block 3. After the drive assembly 4 is released, the compressed spring 12 drives the main block 3 to return to its original position along the spindle 2. The upward movement of the main block 3 causes the connecting rod 8 to move upwards, and the platform 7, under the force transmitted from the connecting rod 8, moves radially inwards along the linear slide rail 5. Simultaneously, the limiting assembly 9 moves radially inwards to release the welding retainer 10, facilitating the removal of the processed welding retainer 10.

[0029] See Figure 4 In some embodiments, the drive assembly 4 includes a threaded shaft 401, a top sleeve 402, a nut 403, and a rotating wheel 404. The bottom end of the threaded shaft 401 is connected to the top end of the spindle 2. The threaded shaft 401 and the spindle 2 are integrally formed. The top sleeve 402 is sleeved on the threaded shaft 401. The bottom end of the top sleeve 402 abuts against the top surface of the main body block 3. The top end of the top sleeve 402 abuts against the bottom surface of the nut 403. The threaded shaft 401 and the nut 403 are screwed together. The nut 403 is connected to the rotating wheel 404.

[0030] Rotating the wheel 404 causes the nut 403 to rotate on the threaded shaft 401. The rotation of the nut 403 causes it to move axially along the threaded shaft 401. The downward movement of the nut 403 causes the top sleeve 402 to move downward. The downward movement of the top sleeve 402 causes the main block 3 to slide downward along the spindle 2, thereby clamping the welding retainer 10. The rotational motion is precisely converted into axial displacement through a screw drive. Manual operation is only required to control the rotation of the wheel 404, simplifying the operation steps while improving the efficiency of fixing and clamping the welding retainer 10.

[0031] See Figure 3In some embodiments, the outer sidewall of the inner ring 901 is symmetrically provided with limiting blocks 13, and the inner sidewall of the outer ring 902 is symmetrically provided with limiting grooves 14. The limiting blocks 13 are slidably fitted into the limiting grooves 14. The limiting blocks 13 cooperate with the limiting grooves 14 to restrict the outer ring 902 from rotating relative to the inner ring 901.

[0032] The engagement of the limiting block 13 and the limiting groove 14 increases the ease of replacing different limiting outer rings 902. When drilling, the drilling force acts on the welding retainer 10, and the rotation tendency of the welding retainer 10 causes the limiting outer ring 902 to rotate. The rotation of the limiting outer ring 902 is restricted by the engagement of the limiting groove 14 and the limiting block 13, and the constraint of the limiting block 13 keeps the limiting outer ring 902 circumferentially fixed.

[0033] It saves adjustment time when clamping welding cages of different specifications, and improves the adaptability and clamping efficiency of the tooling.

[0034] In some embodiments, a locking washer 15 is provided between the top end of the top sleeve 402 and the bottom surface of the nut 403, and the locking washer 15 is sleeved on the outside of the threaded shaft 401. The locking washer 15 is used to increase the contact area between the nut 403 and the top sleeve 402, preventing the nut 403 from causing indentations on the surface of the top sleeve 402 when tightened. The locking washer 15 protects the structural integrity of the top sleeve 402 and extends the service life of the tooling.

[0035] In some embodiments, a connecting frame 16 is screwed to the end of the platform 7 near the spindle 2, and a reinforcing block 17 is circumferentially provided on the main body block 3, corresponding one by one to the multiple connecting frames 16. The connecting frame 16, the reinforcing block 17 and the connecting rod 8 are all provided with hinge holes 18 at both ends. Pins 19 are provided in the hinge holes 18 on the connecting frame 16 and the hinge holes 18 at one end of the connecting rod 8, as well as in the hinge holes 18 on the reinforcing block 17 and the hinge holes 18 at the other end of the connecting rod 8.

[0036] The connecting frame 16 is screwed to the platform 7, making the connecting frame 16 detachable. When the connecting frame 16 is worn or malfunctions, it is convenient for workers to disassemble, maintain and replace it, reducing tooling maintenance costs. The cooperation between the hinge hole 18 and the pin 19 makes the process of the reinforcing block 17 transmitting force to the platform 7 through the connecting rod 8 more stable.

[0037] In some embodiments, a self-lubricating bushing 20 is provided between the pin 19 and the wall of the hinge hole 18.

[0038] The self-lubricating bushing 20 is used to reduce the frictional resistance when the connecting rod 8 rotates, ensure the smooth movement of the platform 7 when it is subjected to the force transmitted by the connecting rod 8, and ensure the smoothness of the centering process of the welding cage 10.

[0039] See Figure 5In some embodiments, a stepped mounting hole 21 is provided at the center of the base 1, and a mounting block 22 is provided at the bottom end of the spindle 2. When the spindle 2 is connected to the base 1, the spindle 2 passes through the stop 23 of the stepped mounting hole 21, and the mounting block 22 abuts against the shoulder 24 inside the stepped mounting hole 21.

[0040] The stop 23 of the stepped mounting hole 21 is located on the top surface of the base 1. The spindle 2 is inserted into the stepped mounting hole 21 from bottom to top. The upward movement of the mounting block 22 causes its top surface to contact and be positioned with the shoulder 24. The limiting position of the shoulder 24 keeps the spindle 2 in a vertical position, thereby enabling the main block 3 to obtain a precise guiding reference. The base 1 and the spindle 2 are detachably connected, which facilitates the maintenance and replacement of the main block 3, the drive assembly 4, and the locking washer 15.

[0041] In some embodiments, the mounting block 22 is provided with a plurality of first positioning holes 25 evenly arranged around the axis of the spindle 2, and the shoulder 24 is provided with a second positioning hole 26 corresponding to the first positioning hole 25. The positioning pin 27 passes through the first positioning hole 25 and the second positioning hole 26 to fix the spindle 2 on the base 1.

[0042] The positioning pin 27 is inserted into the first positioning hole 25 and the second positioning hole 26, and the spindle 2 is rigidly connected to the base 1, which increases the spindle 2's ability to withstand processing loads and improves the positional accuracy and stability of the spindle 2.

[0043] Work process Before use, select the appropriate limiting outer ring 902 according to the specifications of the welding retainer 10 to be processed, and slide the limiting groove 14 of the limiting outer ring 902 to the limiting block 13 of the limiting inner ring 901 to complete the rapid assembly of the limiting component 9. The reverse rotating wheel 404 drives the nut 403 to move upward along the threaded shaft 401, and the elastic restoring force of the spring 12 drives the main body block 3 to return to its original position upward along the spindle 2. The locking washer 15 and the top sleeve 402 move upward synchronously. At the same time, the upward movement of the main body block 3 drives the upper end of the connecting rod 8 to move upward through the reinforcing block 17. The upward movement of the connecting rod 8 pulls the connecting frame 16 to drive the platform 7 to move radially inward along the linear slide rail 5 under the guidance of the slide seat 6. The inward movement of the platform 7 causes the limiting inner ring 901 and the limiting outer ring 902 to contract synchronously inward, forming an annular space suitable for placing the welding retainer 10 on the top surface of multiple platforms 7.

[0044] The welding retainer 10 is placed between the limiting components 9 of the multiple platforms 7, so that the center of the welding retainer 10 is approximately aligned with the axis of the mandrel 2. The forward rotating wheel 404 drives the nut 403 to move downward along the threaded shaft 401. The downward movement of the nut 403 drives the top sleeve 402 to move downward through the locking washer 15. The bottom end of the top sleeve 402 presses against the top surface of the main body block 3, causing the main body block 3 to slide downward along the mandrel 2 against the resistance of the spring 12. At the same time, the downward movement of the main body block 3 drives the lower end of the connecting rod 8 to move downward through the reinforcing block 17. The downward movement of the connecting rod 8 pushes the connecting frame 16 to drive the platform 7 to move radially outward along the linear slide rail 5 under the guidance of the slide seat 6. The synchronous outward movement of the platform 7 causes the limiting inner ring 901 and the limiting outer ring 902 to expand radially as a whole.

[0045] In this process, some of the limiting outer rings 902 on the platform 7 first contact the inner wall of the welding retainer 10. The reaction force generated by the contact causes the welding retainer 10 to slide and adjust its position on the top surface of the platform 7, achieving initial centering. The rotating wheel 404 continues to rotate, increasing the downward movement of the nut 403, until all the limiting outer rings 902 are evenly attached to the inner wall of the welding retainer 10. At this point, under the synchronous action of four or more limiting outer rings 902, the welding retainer 10 achieves precise centering.

[0046] After the welding retainer 10 is precisely centered, the nut 403 is continuously tightened to generate a preload on the locking washer 15, thereby ensuring that the nut 403 and the top sleeve 402 maintain a stable clamping state. The main body block 3 remains in a fixed position. With the help of the transmission of the connecting rod 8, the locking of the platform 7 drives the limiting outer ring 902 to continuously apply a uniform radial clamping force to the inner wall of the welding retainer 10. The cooperation between the limiting block 13 and the limiting groove 14 drives the limiting outer ring 902 to be circumferentially fixed to prevent the welding retainer 10 from rotating, and finally achieves stable centering and fixing of the welding retainer 10, providing a reliable positioning reference for subsequent drilling.

[0047] After drilling is completed, the reverse rotating wheel 404 drives the nut 403 to move upward along the threaded shaft 401. The elastic restoring force of the spring 12 drives the main body block 3 to reset upward along the spindle 2. The locking washer 15 and the top sleeve 402 move upward synchronously. At the same time, the upward movement of the main body block 3 drives the upper end of the connecting rod 8 to move upward through the reinforcing block 17. The upward movement of the connecting rod 8 pulls the connecting frame 16, causing the platform 7 to move radially inward along the linear slide rail 5 under the guidance of the slide block 6. The inward movement of the platform 7 causes the limiting inner ring 901 and the limiting outer ring 902 to contract synchronously towards the center, disengaging from the inner wall of the welding retainer 10 and releasing the radial clamping force on the welding retainer 10.

[0048] This application achieves centering and fixing of the welding retainer 10, avoiding rotation and shaking during drilling. It eliminates the need for repeated alignment and multiple pressure plates, significantly improving processing accuracy, product consistency and clamping efficiency. It is especially suitable for high-precision drilling operations of batch welding retainers 10.

[0049] In the above embodiments, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drilling fixture for welding cages, characterized in that, include: A base is provided with a detachable spindle, on which a main body block is sleeved. The main body block slides axially on the spindle. A drive assembly is provided at the top of the spindle for driving the main body block to slide axially on the spindle. At least four linear slide rails are provided on the top surface of the base, and multiple linear slide rails are evenly distributed circumferentially along the axis of the spindle. Each linear slide rail is provided with a slide block, and a platform is provided on the slide block. The end of the platform near the spindle is hinged to one end of a connecting rod, and the other end of the connecting rod is hinged to the main body block. A limiting component is disposed on the top surface of the stage. The limiting component is used to center and fix the welding retainer. The limiting component includes an inner limiting ring and an outer limiting ring. The inner limiting ring is disposed on the top surface of the stage, and the outer limiting ring is detachably connected to the inner limiting ring.

2. The welding cage drilling fixture according to claim 1, characterized in that, The bottom of the main block has a groove, and one end of a spring is placed in the groove. The other end of the spring is connected to the top surface of the base, and the spring is sleeved on the outside of the mandrel.

3. The welding cage drilling fixture according to claim 2, characterized in that, The drive assembly includes a threaded shaft, a top sleeve, a nut, and a rotating wheel. The bottom end of the threaded shaft is connected to the top end of the spindle, and the threaded shaft and the spindle are integrally formed. The top sleeve is fitted over the threaded shaft. The bottom end of the top sleeve abuts against the top surface of the main body block, and the top end of the top sleeve abuts against the bottom surface of the nut. The threaded shaft is screwed to the nut, and the nut is connected to the rotating wheel.

4. The welding cage drilling fixture according to claim 1, characterized in that, The outer side wall of the inner limiting ring is symmetrically provided with limiting blocks, and the inner side wall of the outer limiting ring is symmetrically provided with limiting grooves. The limiting blocks are slidably fitted into the limiting grooves. The limiting blocks and the limiting grooves cooperate to restrict the outer limiting ring from rotating relative to the inner limiting ring.

5. The welding cage drilling fixture according to claim 3, characterized in that, A locking washer is provided between the top end of the top sleeve and the bottom surface of the nut, and the locking washer is sleeved outside the threaded shaft.

6. The welding cage drilling fixture according to claim 1, characterized in that, A connecting frame is screwed to the end of the platform near the mandrel. The main body block is circumferentially provided with reinforcing blocks that correspond one-to-one with the connecting frames. Hinge holes are provided at both ends of the connecting frame, the reinforcing blocks, and the connecting rod. Pins are provided in the hinge holes on the connecting frame and the hinge holes at one end of the connecting rod, as well as in the hinge holes on the reinforcing blocks and the hinge holes at the other end of the connecting rod.

7. The welding cage drilling fixture according to claim 6, characterized in that, A self-lubricating bushing is provided between the pin and the wall of the hinge hole.

8. The welding cage drilling fixture according to claim 1, characterized in that, The base has a stepped mounting hole at its center, and the bottom end of the mandrel is provided with a mounting block. When the mandrel is connected to the base, the mandrel passes through the stop of the stepped mounting hole, and the mounting block abuts against the shoulder inside the stepped mounting hole.

9. The welding cage drilling fixture according to claim 8, characterized in that, The mounting block is provided with a plurality of first positioning holes evenly distributed around the axis of the mandrel. The shoulder is provided with a second positioning hole corresponding to the first positioning hole. The positioning pin passes through the first positioning hole and the second positioning hole to fix the mandrel on the base.

Images