Special correction equipment for telescopic boom straightness

Abstract

This invention discloses a dedicated flatness correction device for telescopic booms, comprising: a base, on which a rack extending along its length, a first slide rail, and a second slide rail are disposed; a first support mechanism and a second support mechanism, both slidably disposed on the first slide rail for supporting the telescopic boom; and a correction mechanism, slidably disposed on the second slide rail and located between the first and second support mechanisms; the first support mechanism includes a first drive mechanism, the second support mechanism includes a second drive mechanism, and the correction mechanism includes a third drive mechanism; the first, second, and third drive mechanisms are all connected to the rack and pinion for transmission. This invention has a compact structure, can replace the traditional manual hammering correction method, effectively reduces hammer marks on the workpiece surface, improves surface quality, increases correction efficiency and accuracy, and reduces labor intensity.

Description

Technical Field

[0001] This invention relates to the field of telescopic boom alignment technology, and particularly to a dedicated alignment device for telescopic boom flatness. Background Technology

[0002] As a key component of construction machinery, the flatness of the telescopic boom directly affects the smoothness of its extension and retraction and the overall reliability of the machine. Currently, the industry commonly uses manual correction: operators place the boom on a simple support, judge the location of deformation by sight or a ruler, and then repeatedly tap it with a hammer to level it. This method has obvious defects: first, it relies entirely on manual operation, resulting in low correction efficiency and long time consumption per component; second, the tapping force and position are difficult to control precisely, easily leading to over-correction or under-correction, poor flatness consistency, and a high rework rate. Therefore, a dedicated flatness correction device for telescopic booms is needed to replace the traditional manual hammering method. Summary of the Invention

[0003] The main purpose of this invention is to provide a dedicated device for correcting the flatness of telescopic booms, aiming to solve the problem of time-consuming and labor-intensive manual correction.

[0004] To achieve the above objectives, the technical solution proposed by this invention is: a special correction device for the flatness of a telescopic boom, comprising: A base, wherein a rack, a first slide rail and a second slide rail are provided on the base extending along its length; Both the first support mechanism and the second support mechanism are slidably disposed on the first slide rail for supporting the telescopic boom. The correction mechanism is slidably disposed on the second slide rail and located between the first support mechanism and the second support mechanism; The first support mechanism includes a first drive mechanism, the second support mechanism includes a second drive mechanism, and the correction mechanism includes a third drive mechanism; the first drive mechanism, the second drive mechanism, and the third drive mechanism are all connected to the rack and pinion drive. The calibration mechanism also includes: The upright plate is fixedly mounted on the third base of the correction mechanism; A crossbeam is erected on top of the vertical plate; A transverse guide rail is provided on the lower surface of the crossbeam; The sliding seat is slidably engaged with the transverse guide rail; A lateral drive assembly, disposed on the vertical plate or crossbeam, is used to drive the sliding seat to move along the crossbeam; A hydraulic cylinder is installed below the sliding seat, and its output end is provided with a pressure head for leveling.

[0005] Preferably, the first drive mechanism, the second drive mechanism, and the third drive mechanism have the same structure, and each includes: Connecting plate; The drive motor is mounted on the connecting plate; A gearbox is mounted on the connecting plate, and the input shaft of the gearbox is connected to the output shaft of the drive motor; A gear is connected to the output shaft of the gearbox and below the connecting plate, and the gear meshes with the rack.

[0006] Preferably, the lateral drive component includes: The transverse transmission lead screw is threadedly engaged with the threaded hole on the sliding seat, and its two ends are rotatably connected to the vertical plate; A horizontal motor is fixed to the outside of the vertical plate, and its output shaft is connected to the horizontal transmission lead screw.

[0007] Preferably, the base is rectangular, and a long groove is formed in the middle of the base along the length direction, and the rack is fixedly installed on the side wall of the long groove.

[0008] Preferably, there are two first slide rails, which are arranged parallel to each other on the upper surface of the base; there are also two second slide rails, which are arranged parallel to each other on the upper surface of the base; both the first and second slide rails extend along the length of the base.

[0009] Preferably, the first support mechanism further includes a first base, and the first drive mechanism is mounted on the first base; the second support mechanism further includes a second base, and the second drive mechanism is mounted on the second base.

[0010] Preferably, the first support mechanism, the correction mechanism, and the second support mechanism are arranged in a straight line along the length of the base.

[0011] Preferably, it also includes a control unit, which is electrically connected to the first drive mechanism, the second drive mechanism and the third drive mechanism respectively.

[0012] Preferably, both ends of the transverse transmission screw are mounted on the vertical plate via rolling bearings, the output shaft of the transverse motor is connected to the transverse transmission screw via a coupling, and the vertical plate is also provided with bearing seats for mounting the rolling bearings.

[0013] Preferably, both the first base and the second base are equipped with scissor lifts.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention, through the rack and pinion mounted on the base and the independently configured drive mechanisms of the first support mechanism, the second support mechanism, and the correction mechanism, achieves independent movement of the three mechanisms along the length of the base. This allows for flexible adjustment of the support and correction positions according to the actual length of the telescopic boom, meeting the continuous correction requirements of ultra-long booms. The cooperation of the crossbeam, transverse guide rail, sliding seat, and transverse drive assembly in the correction mechanism enables the pressure-correcting actuator to move precisely in the crossbeam direction, adapting to booms of different widths or cross-sections without manual repositioning. Simultaneously, the first and second support mechanisms are located on either side of the correction mechanism, forming a layout of double-sided support and central pressure application. The stress state conforms to a simply supported beam model, effectively avoiding secondary deformation during the correction process. Furthermore, the precise adjustment of the support spacing and the accurate positioning of the hydraulic cylinder make the pressure position and force controllable each time, effectively avoiding over-correction and under-correction problems associated with manual tapping, improving the flatness correction accuracy and the consistency of mass production. Meanwhile, this invention uses hydraulic cylinder pressure calibration instead of traditional hammering calibration, reducing hammer marks and significantly improving the surface appearance quality of the telescopic boom while ensuring flatness. By replacing impact calibration with static pressure calibration, localized dents and metal surface damage caused by hammering are avoided, resulting in a smoother and more aesthetically pleasing boom after calibration. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a side view of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Base; 2. First support mechanism; 21. First base; 22. First drive mechanism; 3. Second support mechanism; 31. Second base; 32. Second drive mechanism; 4. First slide rail; 5. Second slide rail; 6. Correction mechanism; 61. Third base; 62. Third drive mechanism; 7. Vertical plate; 8. Horizontal motor; 9. Crossbeam; 10. Horizontal guide rail; 11. Horizontal transmission screw; 12. Sliding seat; 13. Hydraulic cylinder; 14. Pressure head; 16. Rack; 17. Long slot.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0024] Example 1 This invention proposes a dedicated device for correcting the flatness of telescopic booms.

[0025] As attached Figure 1 -Appendix Figure 3 As shown, the telescopic boom flatness correction device proposed in this invention includes: The base 1 is provided with a rack 16 extending along its length, a first slide rail 4 and a second slide rail 5; The first support mechanism 2 and the second support mechanism 3 are both slidably disposed on the first slide rail 4 to support the telescopic boom. The correction mechanism 6 is slidably disposed on the second slide rail 5 and located between the first support mechanism 2 and the second support mechanism 3; The first support mechanism 2 includes a first drive mechanism 22, the second support mechanism 3 includes a second drive mechanism 32, and the correction mechanism 6 includes a third drive mechanism 62; the first drive mechanism 22, the second drive mechanism 32, and the third drive mechanism 62 are all connected to the rack 16 in a transmission manner. The calibration mechanism 6 also includes: The upright plate 7 is fixedly mounted on the third base 61 of the correction mechanism 6; The crossbeam 9 is mounted on top of the vertical plate 7; A transverse guide rail 10 is disposed on the lower surface of the crossbeam 9; The sliding seat 12 is slidably engaged with the transverse guide rail 10; A transverse drive assembly is disposed on the vertical plate 7 or the crossbeam 9, for driving the sliding seat 12 to move along the crossbeam 9; Hydraulic cylinder 13 is installed below the sliding seat 12, and its output end is provided with a pressure head for leveling.

[0026] Specifically, rack 16 is fixedly installed along the length of base 1. First slide rail 4 and second slide rail 5 are both linear guides, used to support the support mechanism and correction mechanism respectively. First support mechanism 2 and second support mechanism 3 are used to lift the telescopic boom from below. V-blocks or flat pads can be installed on their upper surfaces to accommodate booms with different cross-sectional shapes. Correction mechanism 6 is located between the two, with its upright plate 7 vertically fixed to the third base 61. Crossbeam 9 can be bolted or welded to the top of upright plate 7. The transverse guide rail 10 is preferably two parallel linear guide rail pairs, with sliding seat 12 straddling them. The transverse drive assembly can be a servo motor-driven screw mechanism, or a synchronous belt or rack and pinion mechanism. In use, the boom is first leveled using the first and second support mechanisms, then the correction mechanism is moved to the deformed position. The pressure head is adjusted to align with the deformed point using the transverse drive assembly, and finally, the hydraulic cylinder 13 applies downward pressure to complete the correction.

[0027] This invention utilizes a rack mounted on the base and independently configured drive mechanisms for the first, second, and correction mechanisms. This enables independent movement of the three mechanisms along the base's length, allowing for flexible adjustment of support and correction positions based on the actual length of the telescopic boom, meeting the continuous correction requirements of ultra-long booms. The coordination of the crossbeam, lateral guide rail, sliding seat, and lateral drive assembly in the correction mechanism allows the pressure-correcting actuator to move precisely in the crossbeam direction, adapting to booms of different widths or cross-sections without manual repositioning. Simultaneously, the first and second support mechanisms are located on either side of the correction mechanism, forming a layout of double-sided support and central pressure application. This force distribution conforms to a simply supported beam model, effectively preventing secondary deformation during the correction process. Furthermore, precise adjustment of the support spacing and accurate positioning of the hydraulic cylinders ensure controllable pressure position and force for each application, effectively avoiding over- and under-correction issues associated with manual tapping, thus improving the flatness correction accuracy and consistency in mass production.

[0028] Preferably, the first drive mechanism 22, the second drive mechanism 32, and the third drive mechanism 62 have the same structure, and each includes: Connecting plate; The drive motor is mounted on the connecting plate; A gearbox is mounted on the connecting plate, and the input shaft of the gearbox is connected to the output shaft of the drive motor; A gear is connected to the output shaft of the gearbox and below the connecting plate, and the gear meshes with the rack 16.

[0029] Specifically, the connecting plate can be made of welded or cast steel plate, and the drive motor is preferably a servo motor, whose output shaft is connected to the input shaft of the gearbox via a key or coupling. The gearbox is a planetary gearbox or a worm gear gearbox to obtain a large reduction ratio and self-locking capability. The gear is mounted on the output shaft of the gearbox and located below the connecting plate, meshing with the rack 16 on the base 1. For ease of installation, an elongated hole can be provided on the connecting plate to adjust the meshing clearance between the gear and the rack. Each drive mechanism works independently; when one drive motor rotates, the corresponding mechanism moves along the rack 16, while the other mechanisms remain stationary. This method allows the positions of the three mechanisms to be controlled independently, thereby adapting to booms of different lengths and different correction points.

[0030] Preferably, the lateral drive component includes: The transverse transmission lead screw 11 is threadedly engaged with the threaded hole on the sliding seat 12, and its two ends are rotatably connected to the vertical plate 7; A horizontal motor 8 is fixed to the outside of the vertical plate 7, and its output shaft is connected to the horizontal transmission screw 11.

[0031] Preferably, the base 1 is rectangular, and a long groove 17 is formed in the middle of the base 1 along the length direction. The rack 16 is fixedly installed on the side wall of the long groove 17.

[0032] Specifically, a long groove 17 is centrally located along the length of the upper surface of the base 1. The groove has a rectangular or trapezoidal cross-section. A rack 16 is fixedly mounted to one side wall of the long groove 17 using screws or locating pins, with the toothed surfaces facing the centerline of the groove. This built-in mounting method effectively prevents external debris such as welding slag, iron filings, and dust from falling directly onto the rack 16, while also reducing accidental contact by operators, improving safety and service life. A chip removal hole can be provided at the bottom of the long groove 17 for easy cleaning.

[0033] Preferably, there are two first slide rails 4, which are arranged parallel to each other on the upper surface of the base 1; there are two second slide rails 5, which are arranged parallel to each other on the upper surface of the base 1; both the first slide rails 4 and the second slide rails 5 extend along the length direction of the base 1.

[0034] Specifically, there are two first slide rails 4, which are fixed parallel to each other on both sides of the upper surface of the base 1, forming the moving tracks of the first support mechanism 2 and the second support mechanism 3. There are also two second slide rails 5, which are also arranged parallel to each other, but are located outside the first slide rails 4, depending on the structural space. All slide rails extend along the entire length of the base 1 and are made of high-strength bronze or rolling linear guide pairs. The bottom of the first support mechanism 2 and the second support mechanism 3 are equipped with sliders that cooperate with the first slide rails 4, and the bottom of the correction mechanism 6 is equipped with sliders that cooperate with the second slide rails 5. This double-rail structure can withstand the weight of the boom and the off-center load torque during correction, ensuring smooth movement and centering.

[0035] Preferably, the first support mechanism 2 further includes a first base 21, and the first drive mechanism 22 is mounted on the first base 21; the second support mechanism 3 further includes a second base 31, and the second drive mechanism 32 is mounted on the second base 31.

[0036] Preferably, the first support mechanism 2, the correction mechanism 6, and the second support mechanism 3 are arranged in a straight line along the length of the base 1.

[0037] Preferably, it also includes a control unit, which is electrically connected to the first drive mechanism 22, the second drive mechanism 32 and the third drive mechanism 62 respectively.

[0038] Specifically, the control unit can be a control cabinet used to control the movement of the three mechanisms, thereby adjusting them to the appropriate positions.

[0039] Preferably, both ends of the transverse transmission screw 11 are respectively mounted on the vertical plate 7 via rolling bearings, the output shaft of the transverse motor 8 is connected to the transverse transmission screw 11 via a coupling, and the vertical plate 7 is also provided with a bearing seat for mounting the rolling bearings.

[0040] Preferably, both the first base 21 and the second base 31 are equipped with scissor lifts.

[0041] Specifically, the scissor lift consists of multiple sets of cross linkages, which are driven to open and close via lead screws or hydraulic cylinders, thereby adjusting the height of the pallet. When using this equipment, the scissor lifts on the two support mechanisms can be adjusted separately to ensure that each segment of the boom is supported in a horizontal state, preventing additional bending moments or torsional deformation of the boom due to inconsistent support surface heights. The scissor lift can also be locked at any position within its lifting stroke to ensure stability during the alignment process.

[0042] Working principle: In use, firstly, based on the length of the telescopic boom to be corrected, manually activate the first drive mechanism 22 and the second drive mechanism 32, respectively driving the corresponding gears to rotate along the rack 16, so that the first support mechanism 2 and the second support mechanism 3 independently move along the first slide rail 4 to a suitable support spacing. Then, adjust the support height of the two support mechanisms separately using a scissor lift to ensure the boom is smoothly lifted and kept horizontal. The operator observes and determines the position of the protrusions or depressions on the boom surface with the naked eye or with the help of simple tools such as a ruler or feeler gauge. Based on this position, manually control the third drive mechanism 62 to drive the correction mechanism 6 to move longitudinally along the second slide rail 5, so that the hydraulic cylinder 13 moves to the approximate longitudinal position of the deformed part; at the same time, manually activate the lateral motor 8 to drive the lateral transmission screw 11 to rotate, so that the sliding seat 12 moves laterally along the lateral guide rail 10, precisely aligning the pressure head of the hydraulic cylinder 13 directly above the deformed point.

[0043] After alignment, the hydraulic cylinder 13 is manually activated, its pressure head extending downwards to apply pressure to the protruding parts of the boom or to press down on the recessed parts from the back, using the principle of metal plastic deformation to level the deformed area. After one press, the pressure head retracts, and the operator checks the flatness of the area again. If it still does not meet the requirements, the above movement, alignment, and pressing steps can be repeated until the area is satisfactory. Subsequently, the operator continues to find the next deformed location and repeats the above process until the entire telescopic boom meets the required flatness standard.

[0044] Example 2 The calibration device also includes an internal calibration device that can extend into the internal cavity of the telescopic boom to push the concave part of the boom from the inside out.

[0045] The internal correction device includes a fork-shaped moving mechanism, a small hydraulic cylinder, and a miniature pressure head. The fork-shaped moving mechanism has a long rod-shaped fork handle and a fork head located at the front end of the fork handle.

[0046] The miniature hydraulic cylinder is positioned in front of the fork head. By pushing the fork handle, the miniature hydraulic cylinder is moved to the location requiring correction. The micro pressure head is located at the movable end of the miniature hydraulic cylinder. After the fork head pushes the device to the designated position, the miniature hydraulic cylinder is activated, causing the micro pressure head to press the recessed area from the inside out, restoring the recessed area to a flat state.

[0047] This internal correction device works in conjunction with the aforementioned gantry-type correction mechanism. For internal depressions that are difficult to access from the outside or that remain after external correction, this device can be used for secondary correction from the inside, further improving the overall flatness of the telescopic boom. Preferably, the fork head can be designed with an adjustable width to accommodate different boom cross-sectional dimensions.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A special device for correcting the flatness of a telescopic boom, characterized in that, include: The base (1) is provided with a rack (16) extending along its length, a first slide rail (4) and a second slide rail (5); The first support mechanism (2) and the second support mechanism (3) are both slidably arranged on the first slide rail (4) to support the telescopic boom; The correction mechanism (6) is slidably disposed on the second slide rail (5) and located between the first support mechanism (2) and the second support mechanism (3); The first support mechanism (2) includes a first drive mechanism (22), the second support mechanism (3) includes a second drive mechanism (32), and the correction mechanism (6) includes a third drive mechanism (62); the first drive mechanism (22), the second drive mechanism (32), and the third drive mechanism (62) are all connected to the rack (16) in a transmission manner; The calibration mechanism (6) further includes: The upright plate (7) is fixedly mounted on the third base (61) of the correction mechanism (6); A crossbeam (9) is mounted on top of the vertical plate (7); A transverse guide rail (10) is provided on the lower surface of the crossbeam (9); The sliding seat (12) is slidably engaged with the transverse guide rail (10); A transverse drive assembly is disposed on the vertical plate (7) or the crossbeam (9) for driving the sliding seat (12) to move along the crossbeam (9); A hydraulic cylinder (13) is installed below the sliding seat (12), and its output end is provided with a pressure head for leveling.

2. The telescopic boom flatness correction device according to claim 1, characterized in that, The first drive mechanism (22), the second drive mechanism (32), and the third drive mechanism (62) have the same structure and each includes: Connecting plate; The drive motor is mounted on the connecting plate; A gearbox is mounted on the connecting plate, and the input shaft of the gearbox is connected to the output shaft of the drive motor; A gear is connected to the output shaft of the gearbox and below the connecting plate, and the gear meshes with the rack (16).

3. The telescopic boom flatness correction device according to claim 1, characterized in that, The lateral drive component includes: The transverse transmission screw (11) is threadedly engaged with the threaded hole on the sliding seat (12), and its two ends are rotatably connected to the vertical plate (7); A horizontal motor (8) is fixed to the outside of the vertical plate (7), and its output shaft is connected to the horizontal transmission screw (11).

4. The telescopic boom flatness correction device according to claim 1, characterized in that, The base (1) is rectangular in shape, and a long groove (17) is provided in the middle of the base (1) along the length direction. The rack (16) is fixedly installed on the side wall of the long groove (17).

5. The telescopic boom flatness correction device according to claim 1, characterized in that, There are two first slide rails (4), which are arranged in parallel on the upper surface of the base (1); there are two second slide rails (5), which are arranged in parallel on the upper surface of the base (1); both the first slide rail (4) and the second slide rail (5) extend along the length direction of the base (1).

6. The special flatness correction device for telescopic booms according to claim 1, characterized in that, The first support mechanism (2) further includes a first base (21), and the first drive mechanism (22) is mounted on the first base (21); the second support mechanism (3) further includes a second base (31), and the second drive mechanism (32) is mounted on the second base (31).

7. The telescopic boom flatness correction device according to claim 1, characterized in that, The first support mechanism (2), the correction mechanism (6) and the second support mechanism (3) are arranged in a straight line along the length of the base (1).

8. The special flatness correction device for telescopic booms according to claim 1, characterized in that, It also includes a control unit, which is electrically connected to the first drive mechanism (22), the second drive mechanism (32) and the third drive mechanism (62) respectively.

9. The telescopic boom flatness correction device according to claim 3, characterized in that, The two ends of the transverse transmission screw (11) are respectively mounted on the vertical plate (7) through rolling bearings. The output shaft of the transverse motor (8) is connected to the transverse transmission screw (11) through a coupling. The vertical plate (7) is also provided with a bearing seat for mounting the rolling bearing.

10. The telescopic boom flatness correction device according to claim 6, characterized in that, Both the first base (21) and the second base (31) are equipped with scissor lifts.

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