A type of transfer lifting tool

Abstract

This application discloses a transfer lifting device, relating to the field of lifting device technology. The transfer lifting device is used to lift a stator core with at least two dovetail keys. The device includes a fixing member and at least two clamps. The fixing member is arranged parallel to the stator core. The at least two clamps are fixed to the fixing member at intervals along its axial direction, and are used to clamp the dovetail keys on the stator core one-to-one. Each clamp is used to clamp the two side walls of the dovetail key along its width direction. Each clamp is equipped with an adjusting member for adjusting the clamping force. This transfer lifting device solves the problem of relative displacement and torsion between the dovetail keys and the stator core during lifting.

Description

Technical Field

[0001] This application relates to the field of lifting equipment technology, and in particular to a transfer lifting equipment. Background Technology

[0002] Currently, the long stator is a core component in rail vehicles that provides the levitation magnetic field. Lay on the track, its lower surface serves as the reference surface for the levitation gap, and its sides serve as the reference surface for the guide gap. In the long stator assembly process, silicon steel sheets are first stacked together using a stacking fixture, which also positions the dovetail key. After positioning, the dovetail key is temporarily fixed by bonding or welding. Subsequently, the long stator core is transported to the casting system for surface casting using a lifting device. However, the currently used lifting devices have the following problems:

[0003] Firstly, relative displacement occurs between the dovetail key and the iron core: due to unreasonable design of the hoisting tool, the dovetail key or iron core is subjected to uneven force during hoisting, causing the glue joint or weld between the dovetail key and the silicon steel laminate to crack, thus causing relative movement between the two (the iron core and dovetail key have been positioned and temporarily fixed by the long stator stacking tool before hoisting, and then transferred to the casting system for surface casting by hoisting).

[0004] Secondly, the dovetail key twisted: because the lifting equipment was not lifted vertically during the lifting process, the dovetail key twisted to a certain extent, affecting the subsequent installation of the long stator on the track. Utility Model Content

[0005] The purpose of this application is to provide a transfer lifting device that solves the problem of relative displacement and torsion between the dovetail key and the iron core during the lifting process.

[0006] To achieve the above objectives, this application provides a transfer lifting device for lifting stator cores with at least two dovetail keys. The transfer lifting device includes:

[0007] Fasteners are used to set parallel to the stator core;

[0008] At least two clamps are fixed to the fixing member at intervals along the axial direction of the fixing member, and are used to clamp the dovetail key on the stator core one by one. Each clamp is used to clamp the two side walls of the dovetail key along the width direction. Each clamp is provided with an adjustment element, which is used to adjust the clamping force of the clamp.

[0009] In some embodiments, any clamp has a clamping surface for contacting and abutting against the dovetail key, the length of which is at least more than half the length of the dovetail key.

[0010] In some embodiments, any clamp is connected to a clamp seat, the clamp seat having a clamping surface, and the length of the clamp seat being greater than half the length of the dovetail key and less than the length of the dovetail key.

[0011] In some embodiments, the inner surface of the clamp is provided with a flexible protective layer, which is used to abut against the sidewall of the dovetail key.

[0012] In some embodiments, the clamps include:

[0013] The left and right clamps are arranged symmetrically along the width of the dovetail key, respectively.

[0014] The pivot passes through both the left and right clamps, allowing the left and right clamps to rotate relative to each other.

[0015] The adjusting component is a threaded pull rod. One end of the threaded pull rod is hinged to the left clamp body, and the other end passes through the right clamp body and engages with the adjusting nut on the outside of the right clamp body. The clamping force between the left and right clamp bodies can be changed by turning the adjusting nut.

[0016] In some embodiments, the fastener is a horizontal tube beam with a square cross-section, and the clamp is detachably locked to the lower flange of the horizontal tube beam by a bolt pair.

[0017] In some embodiments, the horizontal tube beam is provided with two flexible slings on the side away from the clamp, and the two flexible slings are connected by a lifting ring, which is used to connect the cantilever crane.

[0018] In some embodiments, the number of clamps is three, with one clamp located in the middle of the fixing member and the other two clamps symmetrically distributed on both sides of the middle clamp of the fixing member.

[0019] In some embodiments, the fixing member is provided with an inclination sensor for detecting the levelness of the stator core. The inclination sensor is electrically connected to a controller, which is used to issue an alarm signal when the levelness exceeds a preset threshold.

[0020] In some embodiments, the controller is also connected to an audible and visual alarm, which is mounted in the middle of the fixture.

[0021] Compared to the aforementioned background technology, the transfer lifting device provided in this application embodiment is used to lift a stator core with at least two dovetail keys. The transfer lifting device includes a fixing member and at least two clamps. The fixing member is arranged parallel to the stator core; the at least two clamps are fixed to the fixing member at intervals along its axial direction, and are used to clamp the dovetail keys on the stator core one-to-one. Each clamp is used to clamp the two side walls of the dovetail key along its width direction, and each clamp is provided with an adjusting member for adjusting the clamping force.

[0022] The main benefits of this type of transfer lifting device include:

[0023] Firstly, compared to existing lifting devices that suffer from uneven stress leading to cracking of the adhesive / weld and slippage of the dovetail key, this application utilizes a structure of a fixing component and at least two clamps to ensure that all dovetail keys are clamped synchronously. The clamping force can be precisely set and kept consistent via an adjusting component, thereby maintaining the dovetail key and the silicon steel stack as a rigid whole throughout the entire lifting process. This eliminates local overload and micro-slippage, significantly reducing the risk of adhesive / weld cracking.

[0024] Secondly, compared to traditional single-point or asymmetrical lifting, which easily generates torque in the horizontal plane, causing excessive torsion of the dovetail key, the clamps in this application are arranged at intervals along the axial direction of the fixing member, and the clamping surfaces are in close contact with the two side walls in the width direction of the dovetail key, forming a symmetrical clamping torque; the fixing member is parallel to the iron core and maintains a horizontal posture, ensuring that the lifting force is always vertically upward, the dovetail key has no additional torsional torque, and the torsion is controlled within the accuracy requirements. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the transfer lifting device in the embodiments of this application.

[0027] Figure 2 for Figure 1 The front view of the transfer lifting device shown.

[0028] Figure 3 for Figure 1 Top view of the transfer lifting device shown.

[0029] in:

[0030] 10-Factors;

[0031] 20-Clamping clamp, 21-Left clamp body, 22-Right clamp body, 23-Spindle;

[0032] 30 - Adjustment component;

[0033] 40-Clamping seat;

[0034] 50-Flexible sling;

[0035] 60 - Rings. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0039] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the transfer lifting device in the embodiments of this application. Figure 2 for Figure 1 The front view of the transfer lifting device shown. Figure 3 for Figure 1 Top view of the transfer lifting device shown.

[0040] The transfer lifting device provided in this application embodiment is used to lift stator cores with at least two dovetail keys. The transfer lifting device includes a fixing member 10 and at least two clamps 20.

[0041] The fastener 10 is used to be arranged parallel to the stator core. The fastener 10 can be a tube beam structure, and the lower flange of the tube beam structure is provided with at least two clamps 20 at intervals.

[0042] At least two clamps 20 are fixed at intervals along the axial direction of the fixing member 10 to the lower flange of the fixing member 10, and each clamp 20 is used to clamp the dovetail key on the stator core in a one-to-one correspondence.

[0043] Each clamp 20 is used to clamp the two side walls of the dovetail key along the width direction. Each clamp 20 is provided with an adjusting element 30, which is used to adjust the clamping force of the clamp 20. When the clamp 20 clamps the corresponding dovetail key, the adjusting element 30 is adjusted to increase the clamping force of the clamp 20 and prevent the stator core from falling off during hoisting.

[0044] Compared to existing lifting devices that suffer from uneven stress leading to adhesive / weld cracking and dovetail key slippage, this application utilizes a structure of fixing element 10 + at least two clamps 20 to simultaneously clamp all dovetail keys. The clamping force can be precisely set and maintained consistently via adjusting element 30, thereby keeping the dovetail keys and silicon steel stack as a rigid whole throughout the lifting process. This eliminates local overload and micro-slippage, significantly reducing the risk of adhesive / weld cracking.

[0045] Compared to traditional single-point or asymmetrical lifting methods that easily generate torque in the horizontal plane, causing excessive torsion of the dovetail key, the clamps 20 in this application are arranged at intervals along the axial direction of the fixing member 10, and the clamping surfaces are in close contact with the two side walls in the width direction of the dovetail key, forming a symmetrical clamping torque; the fixing member 10 is parallel to the iron core and maintains a horizontal posture, ensuring that the lifting force is always vertically upward, the dovetail key has no additional torsional torque, and the torsion is controlled within the accuracy requirements.

[0046] In some embodiments, any clamp 20 has a clamping surface for contacting and abutting against the dovetail key, the length of which is at least more than half the length of the dovetail key.

[0047] It can be seen that by setting the length of the clamping surface of the clamp 20 to be at least more than half the length of the dovetail key, the force-bearing section of the dovetail key is significantly lengthened, and the clamping force is more evenly distributed along the length of the dovetail key. This avoids stress concentration and micro-deformation caused by traditional point contact or short contact, thereby ensuring high repeatability positioning accuracy between the dovetail key and the clamp 20.

[0048] In this embodiment, any clamp 20 is connected to a clamping seat 40, which has a clamping surface. The length of the clamping seat 40 is greater than half the length of the dovetail key but less than the length of the dovetail key. The clamping seat 40 can smoothly pass laterally through the upper plane of the dovetail key's "I" shape.

[0049] In this way, the longer clamp 40 covers more than half of the length of the dovetail key, which can provide greater anti-overturning moment and anti-torque under impact load during the lifting process, significantly reduce the lateral sway and micro-rotation of the dovetail key, and improve the stability of the lifting device.

[0050] In addition, the inner surface of the clamp 40 is provided with a flexible protective layer, which is used to abut against the side wall of the dovetail key.

[0051] By adding a flexible protective layer (such as polyurethane, rubber or composite fiber pad) to the inner surface of the clamp 40, it can absorb impact and reduce micro-scratches and indentations generated during clamping. On the other hand, it can generate a small deformation under the action of clamping force, increase the effective contact area, and further homogenize the stress distribution, thereby protecting the dovetail key surface plating, hardening layer or paint layer, and extending the service life of the dovetail key and clamping mechanism.

[0052] Of course, depending on actual needs, the flexible protective layer can also be felt. The felt is bonded to the inner surface of the clamp 40. By setting the felt, the paint layer on the surface of the dovetail key can be avoided during the lifting process.

[0053] In some embodiments, the clamp 20 includes a left clamp body 21, a right clamp body 22, and a pivot 23.

[0054] The left clamp 21 and the right clamp 22 are arranged symmetrically along the width direction of the dovetail key, respectively; the rotating shaft 23 passes through both the left clamp 21 and the right clamp 22, so that the left clamp 21 and the right clamp 22 can rotate relative to each other.

[0055] Furthermore, the adjusting member 30 is a threaded pull rod, one end of which is hinged to the left clamp body 21, and the other end passes through the right clamp body 22 and engages with the adjusting nut on the outside of the right clamp body 22, so as to change the clamping force between the left clamp body 21 and the right clamp body 22 by turning the adjusting nut.

[0056] In this way, the left clamp body 21 and the right clamp body 22 are symmetrically arranged along the width direction of the dovetail key and share a common rotating shaft 23, forming a natural "scissor" symmetrical clamping mechanism. Regardless of dimensional deviations or form errors in the width direction of the dovetail key, the left clamp body 21 and the right clamp body 22 can rotate synchronously around the rotating shaft 23, ensuring that the clamping forces on both sides are equal in magnitude and opposite in direction, fundamentally eliminating the phenomenon of unilateral overpressure or uneven load, and further improving the positioning accuracy and clamping reliability. At the same time, one end of the threaded tie rod is hinged to the left clamp body 21, and the other end acts on the right clamp body 22 through the adjusting nut, forming a lever arm amplification effect. The operator only needs to turn the adjusting nut on the outside to achieve stepless and linear adjustment of the clamping force, and the self-locking characteristic of the threaded pair ensures that the clamping force will not loosen on its own under vibration or impact conditions, taking into account the triple requirements of labor saving, fine adjustment and anti-loosening.

[0057] It is important to emphasize that the aforementioned "long clamping surface / clamp seat 40 + flexible protective layer" provides a large-area, flexible clamping force in the longitudinal direction (the length of the dovetail key); the "scissor-type symmetrical clamping + threaded tie rod" in this embodiment provides an adjustable clamping force in the transverse direction (the width of the dovetail key). When these two elements are orthogonally superimposed, they form a composite constraint system for the dovetail key: "large-area flexible longitudinal containment + symmetrical adjustable transverse clamping." This reliably restricts the dovetail key in all six degrees of freedom, preventing micro-slippage and surface damage. The overall performance is superior to clamping in a single direction or single-point clamping schemes.

[0058] In some embodiments, the fixing member 10 is a horizontal pipe beam with a square cross-section, and the clamp 20 is detachably locked to the lower flange of the horizontal pipe beam by bolt pairs. The clamp 20 is detachably connected to the lower flange of the beam by bolt pairs, which allows for quick adjustment of the position or number of clamps 20 using only a wrench without disassembling the lifting device.

[0059] For example, the length of the square tube beam is 730mm. Taking three clamps 20 as an example, the distance between the clamps 20 is 344mm. The bottom of the clamps 20 can pass horizontally through the upper plane of the dovetail key "I". The dovetail key is effectively clamped during the lifting process.

[0060] In some embodiments, two flexible slings 50 are provided on the side of the horizontal pipe beam away from the clamp 20. The two flexible slings 50 are connected by a lifting ring 60, which is used to connect the cantilever crane. The flexible slings 50 can withstand a weight of 2T, and the long lifting ring 60 is made of 35CrMo material and can withstand a weight of 2T.

[0061] In other words, the cantilever crane is connected to the upper part of the horizontal pipe beam by two flexible slings 50 and lifting rings 60. The slings can provide a certain degree of elastic buffering in the X, Y, and Z directions, effectively absorbing the impact when the cantilever crane starts and stops, and reducing the micro-vibration of the dovetail key and clamping mechanism; at the same time, the slings prevent the rigid lifting chain from bumping and scratching the beam, thus extending the service life of the equipment.

[0062] In some embodiments, the number of clamps 20 is three, with one clamp 20 located in the middle of the fixing member 10, and the other two clamps 20 symmetrically distributed on both sides of the middle clamp 20 of the fixing member 10.

[0063] With this configuration, the middle clamp 20 is located at the mid-span of the beam, and the two side clamps 20 are symmetrically arranged, forming a three-point collinear support system. The weight of the dovetail key and the cutting force are uniformly transmitted to the horizontal tube beam through these three points, theoretically generating zero additional bending moment in the beam and greatly reducing secondary deformation of the beam. At the same time, the three clamps 20 act on the three dovetail keys respectively. The dovetail keys are lifted vertically, and during lifting, the dovetail keys and the iron core only bear vertical forces, and the force is uniform, so the dovetail keys will not twist, and the positioning reference can be maintained for a long time.

[0064] As shown above, the force chain of the entire system is: dovetail key → triple clamp 20 → square tube beam → sling → lifting ring 60 → cantilever crane, a short and direct path. The sling has visible wear inspection features, facilitating daily inspections; any abnormalities can be quickly replaced to avoid potential hazards.

[0065] In some embodiments, the fixing member 10 is provided with an inclination sensor for detecting the levelness of the stator core. The inclination sensor is electrically connected to a controller, which is used to issue an alarm signal when the levelness exceeds a preset threshold.

[0066] The tilt sensor is directly installed on the fixing part 10 (square tube beam) to detect the levelness of the stator core in real time. Once the angle deviation exceeds the set threshold, the controller will immediately issue an alarm signal, so that the operator can make fine adjustments before the core is fully in place or tightened, thus avoiding coaxiality, air gap unevenness or excessive vibration caused by the level deviation.

[0067] In some embodiments, the controller is also connected to an audible and visual alarm, which is mounted in the middle of the fixture 10.

[0068] The audible and visual alarm is positioned in the middle of the fixture 10 (the position most easily observed by the operator), and emits both a buzzer and a flashing signal when the levelness is abnormal; even if there is a lot of noise on site and the line of sight is obstructed, it can ensure that the alarm information is captured in time, significantly reducing the risk of human negligence.

[0069] Furthermore, the controller can record the time, angle value, and processing result of each level deviation event, forming a data log. Combined with the MES system, it enables traceability and analysis of assembly quality, providing data support for subsequent process optimization. During hoisting, it can also be linked with the travel / lifting system of the cantilever crane to achieve a closed loop of "detection-alarm-automatic correction".

[0070] Compared to the traditional method of relying on manual leveling instruments for random checks, which is prone to delays and missed inspections, this application uses real-time online monitoring to complete the levelness confirmation in one go during the hoisting stage. This reduces the rework steps such as disassembly, reassembly, and retesting caused by unqualified levelness, and directly reduces labor and equipment downtime costs.

[0071] In summary, the transfer lifting device provided in this application embodiment has the upper part of the clamp 20 fixed on the same square tube, and the lower part of the clamp 20 can pass laterally through the upper plane of the dovetail key "I". When lifting, the dovetail key is clamped, and it can be lifted vertically, ensuring that there is no relative movement between the dovetail key and the silicon steel core. At the same time, it ensures that the dovetail key and the iron core only bear the force in the vertical direction, and the dovetail key will not be twisted during the lifting process, thus avoiding physical dimensional changes in the long stator iron core due to lifting.

[0072] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0073] The foregoing has provided a detailed description of the transfer lifting device provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A transfer lifting device for lifting stator cores with at least two dovetail keys, characterized in that, The transfer lifting equipment includes: Fasteners are used to set parallel to the stator core; At least two clamps are fixed to the fixing member at intervals along the axial direction of the fixing member, and are used to clamp the dovetail keys on the stator core one by one. Each clamp is used to clamp the two side walls of the dovetail key along the width direction. Each clamp is provided with an adjustment member, which is used to adjust the clamping force of the clamp.

2. The transfer lifting device as described in claim 1, characterized in that, Each of the clamps has a clamping surface for contacting and abutting against the dovetail key, the length of which is at least more than half the length of the dovetail key.

3. The transfer lifting device as described in claim 2, characterized in that, Each of the clamps is connected to a clamping seat, the clamping seat having the clamping surface, the length of the clamping seat being greater than half the length of the dovetail key and less than the length of the dovetail key.

4. The transfer lifting device as described in claim 3, characterized in that, The inner surface of the clamp is provided with a flexible protective layer, which is used to abut against the side wall of the dovetail key.

5. The transfer lifting device as described in claim 1, characterized in that, The clamps include: The left and right clamps are arranged symmetrically along the width of the dovetail key, respectively. A pivot shaft passes through both the left and right clamps, allowing the left and right clamps to rotate relative to each other. The adjusting component is a threaded pull rod. One end of the threaded pull rod is hinged to the left clamp body, and the other end passes through the right clamp body and engages with the adjusting nut on the outside of the right clamp body, so as to change the clamping force between the left and right clamp bodies by turning the adjusting nut.

6. The transfer lifting device as described in claim 1, characterized in that, The fastener is a horizontal tube beam with a square cross-section, and the clamp is detachably locked to the lower flange of the horizontal tube beam by a bolt pair.

7. The transfer lifting device as described in claim 6, characterized in that, The horizontal pipe beam is provided with two flexible slings on the side away from the clamp. The two flexible slings are connected by a lifting ring, which is used to connect the cantilever crane.

8. The transfer lifting device as described in claim 1, characterized in that, The number of clamps is three, with one clamp located in the middle of the fixing member and the other two clamps symmetrically distributed on both sides of the clamp in the middle of the fixing member.

9. The transfer lifting device as described in any one of claims 1-8, characterized in that, The fixing component is equipped with an inclination sensor for detecting the levelness of the stator core. The inclination sensor is electrically connected to a controller, which issues an alarm signal when the levelness exceeds a preset threshold.

10. The transfer lifting device as described in claim 9, characterized in that, The controller is also connected to an audible and visual alarm, which is installed in the middle of the fixing component.

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