Portable protective shaft lifting device

Abstract

The utility model discloses a portable protective shaft lifting device which comprises a main body support which comprises vertical supporting frames arranged on the two sides of a shaft to be lifted in a crossing mode, a transverse supporting plate connected to the top ends of the vertical supporting frames on the two sides, and a middle supporting plate horizontally extending inwards from the inner sides of the vertical supporting frames on the two sides at the same height. The rope belt supporting plate stretches across the middle supporting plates on the two sides in a lap joint mode and can move up and down in the vertical direction through a lifting mechanism, and a buffering mechanism is arranged between the rope belt supporting plate and the transverse supporting plate; and the flexible rope belt is used for surrounding the to-be-lifted shaft, the upper end of the flexible rope belt is connected with the rope belt supporting plate through a rope belt aligning assembly, and the rope belt aligning assembly is used for ensuring that the to-be-lifted shaft is located on the lifting vertical line. The shaft neck and the bearing bush are protectively blended, the blending precision of shaft lifting operation is improved, and in the descending process, the bearing surface of the bearing bush is protected to a certain degree; and the overall operation is safe, convenient and efficient.

Description

Technical Field

[0001] This utility model relates to the field of spindle lifting technology, specifically to a convenient protective spindle lifting device. Background Technology

[0002] In the lifting and bearing installation of medium and large-scale precision equipment, the lifting of the spindle usually relies on tools such as chain hoists, jacks, and electric hoists. However, these tools have significant defects in practical applications, which have many adverse effects on the related operations: First, most of the tools used for lifting the spindle have low adjustment precision and excessive lifting range, which can easily damage the journal and bearing; Second, due to space constraints, some tools are difficult to use properly, posing safety hazards; Third, existing spindle lifting tools are mostly for rough adjustment, lacking protection measures for the radial force on the journal and the bearing bearing surface, and the lifting itself carries the risk of journal deformation, making it impossible to guarantee the accuracy of the installation operation and failing to meet the high-precision installation and maintenance requirements of modern precision equipment.

[0003] Therefore, there is an urgent need to design a new type of convenient and protective shaft lifting device to solve the above-mentioned technical problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a convenient protective shaft lifting device.

[0005] This utility model discloses a convenient protective shaft lifting device, comprising:

[0006] The main support frame includes a vertical support frame spanning both sides of the shaft to be lifted, a horizontal support plate connected to the top of the two vertical support frames, and an intermediate support plate extending horizontally inward from the same height inside the two vertical support frames.

[0007] A cable support plate is laid across the top of the middle support plates on both sides, and can be moved up and down vertically by a lifting mechanism. A buffer mechanism is provided between the cable support plate and the transverse support plate.

[0008] A flexible lifting cable is used to surround the shaft to be lifted. Its upper end is connected to the cable support plate through a cable adjustment assembly, which is used to ensure that the shaft to be lifted is located on the lifting vertical line.

[0009] As a further improvement of this utility model, the lifting mechanism includes: a lifting screw, an upper locking nut, an upper adjusting nut, and a lower locking nut;

[0010] The lifting screw is vertically and flexibly sleeved inside the transverse support plate. The upper adjusting nut and the upper locking nut are sequentially arranged above the horizontal support plate corresponding to the lifting screw. The lower end of the lifting screw passes through the cable support plate and is fixed with the lower locking nut. Rotating the upper adjusting nut can drive the lifting screw to move up and down.

[0011] As a further improvement of this utility model, the upper surface of the transverse support plate is provided with a scale in a ring shape corresponding to the outer side of the upper adjusting nut, and the scale is marked with 0-360 degree scale lines; an indicator arrow that cooperates with the scale is provided on the outer circumference of the upper adjusting nut.

[0012] As a further improvement of this utility model, the pitch of the lifting screw is 1-1.5mm, and the nominal diameter of the lifting screw is M12-M24.

[0013] As a further improvement of this utility model, the transverse support plate is provided with a self-lubricating guide sleeve corresponding to the through direction of the lifting screw, and the self-lubricating guide sleeve and the lifting screw are fitted with an H10 clearance.

[0014] As a further improvement of this utility model, at least one horizontal operating hole is provided on the outer circumferential side of the upper adjusting nut, and the operating hole is used to insert a pull pin to drive the upper adjusting nut to rotate.

[0015] As a further improvement of this utility model, the buffer mechanism is a buffer spring, which is placed between the cable support plate and the transverse support plate and sleeved on the outside of the lifting screw.

[0016] As a further improvement of this utility model, the distance between the intermediate support plate on both sides and the transverse support plate is 50-80mm.

[0017] As a further improvement of this utility model, the vertical lifting range of the cable support plate is 0-10mm.

[0018] As a further improvement of this utility model, the cable adjustment assembly includes adjustment nuts; the two ends of the flexible lifting cable are provided with external thread sections, the two ends of the flexible lifting cable pass through the cable support plate respectively, and the two adjustment nuts are respectively screwed onto the corresponding external thread sections.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model, by setting up a main support frame, a liftable cable support plate and a buffer mechanism, and the vertical support frame, horizontal support plate and intermediate support plate of the main support frame forming a stable frame, effectively disperses the lifting stress and avoids deformation of the device; the cable support plate, together with the buffer mechanism, absorbs impact and buffers stress during the lifting and lowering of the main shaft, prevents vibration damage to the journal and bearing, protects the bearing surface of the bearing, solves the problem of difficult protective adjustment in traditional methods, and ensures safe and efficient operation.

[0021] This utility model features a flexible lifting cable, a cable adjustment component, and a liftable cable support plate. The flexible lifting cable replaces rigid clamping with a wrap-around contact, avoiding scratches on the journal surface. The cable adjustment component finely adjusts the lateral position of the cable in real time, and together with the cable support plate, effectively eliminates the deviation between the main shaft centerline and the lifting centerline, eliminates radial force, ensures that the shaft to be lifted is on the lifting vertical line, prevents tilting or falling caused by eccentric loads, and significantly improves the adjustment accuracy of the lifting operation.

[0022] This utility model features an upper adjusting nut with a horizontal operating hole, a modular main support, and a floating lifting and lowering intermediate support. The upper adjusting nut, combined with a needle-pulling tool, enables convenient operation in confined spaces. The modular main support and floating lifting and lowering structure can flexibly adapt to different on-site working conditions, breaking through space limitations and making the device suitable for various spatial environments. Compared with the traditional shaft lifting method, the operation is more convenient and efficient.

[0023] This invention features a fine-pitch threaded lifting screw with a pitch of 1-1.5mm and a dial-based quantitative adjustment mechanism. The fine-pitch threaded lifting screw, in conjunction with the dial, achieves millimeter-level high-precision quantitative adjustment, avoiding component collision and wear caused by over-adjustment, further improving the accuracy of shaft lifting operations, and meeting the high-precision installation and maintenance needs of modern precision equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a convenient protective shaft lifting device disclosed in one embodiment of the present utility model;

[0025] Figure 2 This is a top view of the structure of a convenient protective shaft lifting device disclosed in one embodiment of the present invention.

[0026] In the picture:

[0027] 1. Main support frame; 1.1. Vertical support frame; 1.2. Horizontal support plate; 1.3. Intermediate support plate; 2. Flexible lifting cable; 2.1. External thread section; 3. Lifting mechanism; 3.1. Lifting screw; 3.2. Upper locking nut; 3.3. Upper adjusting nut; 3.4. Lower locking nut; 4. Cable support plate; 4.1. Internal threaded guide hole; 5. Buffer spring; 6. Self-lubricating guide sleeve; 7. Adjusting nut; 8. Dial; 9. Needle puller. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings:

[0032] like Figure 1As shown, a convenient protective shaft lifting device according to this utility model includes a main support 1, a flexible shaft lifting cable 2, a lifting mechanism 3, and a cable support plate 4. The main support 1 includes a vertical support frame 1.1 spanning both sides of the shaft to be lifted, a transverse support plate 1.2 connected to the top of the two vertical support frames 1.1, and an intermediate support plate 1.3 extending horizontally inward from the same height inside the two vertical support frames 1.1. The cable support plate 4 spans and overlaps the two intermediate support plates 1.3, and can be moved up and down vertically by the lifting mechanism 3. A buffer mechanism is provided between the cable support plate 4 and the transverse support plate 1.2. The flexible shaft lifting cable 2 is used to surround the shaft to be lifted. The upper end of the flexible shaft lifting cable 2 is connected to the cable support plate 4 through a cable adjustment component, which is used to ensure that the shaft to be lifted is located on the lifting vertical line.

[0033] In this embodiment, by setting up a main support 1, a liftable cable support plate 4, and a buffer mechanism, the vertical support frame 1.1, the horizontal support plate 1.2, and the intermediate support plate 1.3 of the main support 1 form a stable frame, effectively dispersing lifting stress and preventing device deformation. The cable support plate 4, in conjunction with the buffer mechanism, absorbs impact and buffers stress during the lifting and lowering of the main shaft, preventing vibration damage to the journal and bearing, protecting the bearing bearing surface, solving the problem of difficult protective adjustment in traditional methods, and ensuring safe and efficient operation. By setting up a flexible lifting cable 2, a cable adjustment component, and a liftable cable support plate 4, the flexible lifting cable 2 replaces rigid clamping with a wrap-around contact, avoiding scratches on the journal surface. The cable adjustment component finely adjusts the lateral position of the cable in real time, and in conjunction with the cable support plate 4, effectively eliminates the deviation between the main shaft centerline and the lifting centerline, eliminates radial force, ensures that the shaft to be lifted is on the lifting vertical line, prevents tilting or falling caused by eccentric load, and greatly improves the adjustment accuracy of the shaft lifting operation.

[0034] Specifically:

[0035] like Figure 1-2 As shown, in the above embodiment, preferably, the bottom of the vertical support frames 1.1 on both sides of the main support 1 extends horizontally outward with support feet. The support surface of these support feet can effectively contact the on-site bearing seat or platform, ensuring stable and reliable operation during shaft lifting. In this embodiment, the two vertical support frames 1.1, the horizontal support plate 1.2, and the middle support plate 1.3 are connected by welding.

[0036] In the above embodiment, preferably, the lifting mechanism 3 includes: a lifting screw 3.1, an upper locking nut 3.2, an upper adjusting nut 3.3, and a lower locking nut 3.4; wherein, the lifting screw 3.1 is vertically and flexibly sleeved within the transverse support plate 1.2, and the upper adjusting nut 3.3 and the upper locking nut 3.2 are sequentially arranged above the transverse support plate 1.2 corresponding to the lifting screw 3.1; the lower end of the lifting screw 3.1 passes through the cable support plate 4 and is fixed with the lower locking nut 3.4; rotating the upper adjusting nut 3.3 can drive the lifting screw 3.1 to move up and down, thereby driving the cable support plate 4 at the lower end of the lifting screw 3.1 to move up and down, realizing the lifting or lowering of the flexible lifting cable 2 surrounding the shaft to be lifted. In this embodiment, the cable support plate 4 is provided with an internal threaded guide hole 4.1 corresponding to the passage position of the lifting screw 3.1, and the lower end of the lifting screw 3.1 passes through the internal threaded guide hole 4.1 and is fixed with the lower locking nut 3.4.

[0037] In the above embodiments, preferably, the pitch of the lifting screw 3.1 is 1-1.5mm, and the nominal diameter of the lifting screw 3.1 is M12-M24.

[0038] In the above embodiment, preferably, a scale 8 distributed in a ring shape is provided on the upper surface of the transverse support plate 1.2 corresponding to the outer side of the upper adjusting nut 3.3, and the scale 8 is marked with 0-360 degree scale lines; an indicator arrow that cooperates with the scale 8 is provided on the outer circumference of the upper adjusting nut 3.3. In this embodiment, by setting a fine-pitch thread lifting screw 3.1 with a pitch of 1-1.5mm and a quantitative adjustment mechanism of scale 8, the lifting screw 3.1 cooperates with the scale 8 to achieve millimeter-level high-precision quantitative adjustment, avoiding component collision and wear caused by over-adjustment, further improving the accuracy of shaft lifting operation, and meeting the high-precision installation and maintenance requirements of modern precision equipment.

[0039] In the above embodiment, preferably, a self-lubricating guide sleeve 6 is provided on the transverse support plate 1.2 corresponding to the through direction of the lifting screw 3.1. The self-lubricating guide sleeve 6 and the lifting screw 3.1 are fitted with an H10 clearance. In this embodiment, the self-lubricating guide sleeve 6 is a self-lubricating bearing. The self-lubricating bearing can, on the one hand, constrain the inner hole size through which the lifting screw 3.1 passes, reducing the clearance, and on the other hand, effectively protect the transverse support plate 1.2 and the lifting screw 3.1, avoiding thread wear accidents caused by the lifting screw 3.1 during multiple ascents or descents, and ensuring the lifting and adjustment accuracy to a certain extent.

[0040] In the above embodiments, preferably, the outer circumferential side of the upper adjusting nut 3.3 is provided with at least one horizontal operating hole, which is used to insert the pull pin 9 to drive the upper adjusting nut 3.3 to rotate. In this embodiment, four operating holes are evenly distributed around the outer circumferential side of the upper adjusting nut 3.3. In this embodiment, the upper adjusting nut 3.3 can adjust the lifting screw 3.1, and when the shaft to be lifted is in place, the upper adjusting nut 3.3 can cooperate with the locking nut 3.2 to achieve double nut locking protection, ensure locking safety, and effectively avoid the problem of the main shaft sagging during the operation after lifting.

[0041] In the above embodiment, preferably, the buffer mechanism is a buffer spring 5, which is placed between the cable support plate 4 and the transverse support plate 1.2, and sleeved on the outside of the lifting screw 3.1. The buffer spring 5 can effectively avoid hard contact between the main shaft and the bearing during the main shaft lifting process, avoid sudden increase in lifting amplitude, buffer stress release, and ensure the safety and accuracy of the lifting operation.

[0042] In the above embodiment, preferably, the distance between the two side middle support plates 1.3 and the transverse support plate 1.2 is 50-80mm. In this embodiment, the vertical lifting range of the cable support plate 4 is 0-10mm, which can effectively meet the lifting requirements of shaft diameters within 350mm.

[0043] In the above embodiment, preferably, the cable adjustment assembly includes an adjustment nut 7; the flexible lifting cable 2 has external threaded sections 2.1 at both ends. During actual installation, the external threaded sections 2.1 at both ends of the flexible lifting cable 2 pass through the cable support plate 4 and are screwed onto the corresponding external threaded sections 2.1 by the adjustment nut 7. During actual adjustment, by adjusting the length of the external threaded sections 2.1 at both ends of the flexible lifting cable 2 passing through the cable support plate 4 using the adjustment nut 7, the center of the flexible lifting cable 2 can be adjusted, thereby adjusting the center of the shaft to be lifted around which the flexible lifting cable 2 surrounds. This ensures that during the lifting process, the shaft to be lifted remains on the lifting vertical line during vertical lifting. That is, in this embodiment, the design of the flexible lifting cable 2 effectively avoids radial load on the main shaft to be lifted, has a free alignment function, and ensures that the main shaft is lifted vertically without other radial forces.

[0044] In the above embodiments, preferably, the convenient protective shaft lifting device provided by this utility model is applicable to facilities such as fans, speed reducers, large pumps, and sliding bearing equipment.

[0045] How to use this embodiment:

[0046] 1) The main support 1 is set across both sides of the main shaft to be lifted, so that the bottom support surface of the vertical support frame 1.1 is in stable contact with the bearing seat or platform on site; the cable support plate 4 is installed above the middle support plate 1.3, and a buffer spring 5 is installed between the cable support plate 4 and the horizontal lifting plate 1.2; the flexible lifting cable 2 is arranged around the main shaft, and the position of the flexible lifting cable 2 is initially adjusted by the adjusting bolts 7 of the cable adjustment component, so that the main shaft is positioned at the center of the device;

[0047] 2) Use a dial indicator to detect and record the initial axial and radial displacement of the main shaft; if a deviation is detected, make a slight lateral adjustment to the flexible lifting cable 2 by adjusting the adjusting bolt 7 to correct the position of the main shaft to the lifting vertical line; at the same time, use the upper adjusting nut 3.3 and the lifting screw 3.1 to make millimeter-level height pre-adjustment to the cable support plate 4 to ensure that the tension of the flexible lifting cable 2 is appropriate.

[0048] 3) Loosen the upper locking nut 3.2, insert the pull pin 9 to rotate the upper adjusting nut 3.3 through the pull pin 9, drive the lifting screw 3.1 to rise, and drive the cable support plate 4 and the flexible lifting cable 2 to lift the main shaft; during the lifting process, the buffer spring 5 absorbs vibration and impact to prevent the main shaft from shaking; when the lifting force and the weight of the main shaft tend to be balanced, the buffer spring 5 balances the force through its elasticity to prevent the main shaft from rising or falling instantaneously; continuously monitor the axial and radial displacement of the main shaft with a dial indicator, and adjust the cable position and lifting height in real time to maintain the vertical state of the main shaft;

[0049] In this step, the rotation angle of the upper adjusting nut 3.3 can be determined by observing the scale line on the dial 8 corresponding to the indicator arrow on the side of the upper adjusting nut 3.3.

[0050] 4) When the spindle is raised to the predetermined height, tighten it by using the upper locking nut 3.2 and the upper adjusting nut 3.3 to achieve a double nut locking effect and prevent the spindle from sagging due to loose nuts; with the spindle fixed, perform maintenance and disassembly operations on the bearing bush;

[0051] 5) Loosen the upper locking nut 3.2 and rotate the upper adjusting nut 3.3 in the opposite direction to make the lifting screw 3.1 drive the main shaft to descend. During the descent, the buffer spring 5 continues to play a buffering role to prevent the main shaft from impacting the bearing. Monitor the displacement with a dial indicator to ensure that the main shaft falls vertically. After the main shaft returns to the initial position, remove the flexible shaft lifting cable 2 to complete the shaft lifting operation.

[0052] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A convenient protective shaft lifting device, characterized in that, include: The main support frame includes a vertical support frame spanning both sides of the shaft to be lifted, a horizontal support plate connected to the top of the two vertical support frames, and an intermediate support plate extending horizontally inward from the same height inside the two vertical support frames. A cable support plate is laid across the top of the middle support plates on both sides, and can be moved up and down vertically by a lifting mechanism. A buffer mechanism is provided between the cable support plate and the transverse support plate. A flexible lifting cable is used to surround the shaft to be lifted. Its upper end is connected to the cable support plate through a cable adjustment assembly, which is used to ensure that the shaft to be lifted is located on the lifting vertical line.

2. The convenient protective shaft lifting device according to claim 1, characterized in that, The lifting mechanism includes: a lifting screw, an upper locking nut, an upper adjusting nut, and a lower locking nut; The lifting screw is vertically and flexibly sleeved inside the transverse support plate. The upper adjusting nut and the upper locking nut are sequentially arranged above the horizontal support plate corresponding to the lifting screw. The lower end of the lifting screw passes through the cable support plate and is fixed with the lower locking nut. Rotating the upper adjusting nut can drive the lifting screw to move up and down.

3. The convenient protective shaft lifting device according to claim 2, characterized in that, The upper surface of the transverse support plate is provided with a ring-shaped scale corresponding to the outer side of the upper adjusting nut, and the scale is marked with 0-360 degree scale lines; an indicator arrow that cooperates with the scale is provided on the outer circumference of the upper adjusting nut.

4. The convenient protective shaft lifting device according to claim 2, characterized in that, The pitch of the lifting screw is 1-1.5mm, and the nominal diameter of the lifting screw is M12-M24.

5. The convenient protective shaft lifting device according to claim 2, characterized in that, The transverse support plate is provided with a self-lubricating guide sleeve corresponding to the through direction of the lifting screw, and the self-lubricating guide sleeve and the lifting screw are fitted with an H10 clearance.

6. The convenient protective shaft lifting device according to claim 2, characterized in that, The upper adjusting nut has at least one horizontal operating hole on its outer circumferential side, which is used to insert a pull pin to drive the upper adjusting nut to rotate.

7. The convenient protective shaft lifting device according to claim 2, characterized in that, The buffer mechanism is a buffer spring, which is placed between the cable support plate and the transverse support plate and sleeved on the outside of the lifting screw.

8. The convenient protective shaft lifting device according to claim 1, characterized in that, The distance between the intermediate support plate on both sides and the transverse support plate is 50-80mm.

9. The convenient protective shaft lifting device according to claim 8, characterized in that, The vertical lifting range of the cable support plate is 0-10mm.

10. The convenient protective shaft lifting device according to claim 1, characterized in that, The cable adjustment assembly includes adjustment nuts; both ends of the flexible lifting cable are provided with external thread sections, and the external thread sections at both ends of the flexible lifting cable pass through the cable support plate respectively, and the two adjustment nuts are respectively screwed onto the corresponding external thread sections.

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