A slider assembly, a telescopic arm and a working machine

Abstract

The present application relates to the technical field of engineering machinery, and discloses a sliding block assembly, a telescopic arm and a working machine. The sliding block assembly comprises a pressing plate, a sliding block, a supporting pad, an adjusting gasket, a first fastener and a second fastener. The end of the sliding block is provided with a flange edge, one side of the flange edge is in abutment with the end face of the arm cylinder, the other side of the flange edge is in abutment with the pressing plate, the outer periphery of the flange edge is provided with a first avoiding groove, and the first avoiding groove and the pressing plate enclose a first accommodating cavity. The supporting pad is arranged on the outer periphery of the flange edge, and a second avoiding groove on the supporting pad and the pressing plate enclose a second accommodating cavity. The first section of the adjusting gasket is accommodated in the two accommodating cavities, and the second section is in abutment with the outer periphery side of the sliding block. The adjusting gasket is accommodated in the accommodating cavity, the pressing plate is directly in abutment with the surface of the flange edge and the supporting pad without being locally raised, the pressing plate is prevented from being inclined and the sliding block is prevented from being deflected, the sliding block is ensured to be closely in abutment with the inner arm cylinder to improve the telescopic stability of the arm cylinder, the hole positions are prevented from being dislocated, and the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a slider assembly, a telescopic boom, and a working machine. Background Technology

[0002] The telescopic boom is a core component of cranes, aerial work platforms, and other equipment, enabling them to operate at a wide range of heights. It typically consists of an inner boom tube and an outer boom tube fitted over it. To ensure smooth movement of the inner boom tube during extension and retraction, reduce friction, and withstand lateral loads, a slider is usually installed between the inner wall of the outer boom tube end and the outer circumference of the inner boom tube. The slider is connected to a connecting plate, which is fixed to the end of the outer boom tube to secure it. Due to manufacturing errors and wear during use, the relative position of the slider and the inner boom tube needs to be adjusted according to actual conditions to ensure a close fit between the inner and outer circumferences of the slider and the inner boom tube. Therefore, existing structures usually also include adjusting shims. By increasing or decreasing the number of adjusting shims between the inner and outer circumferences of the outer boom tube and the outer circumference of the slider, the position of the slider relative to the inner boom tube is adjusted to ensure a proper fit.

[0003] However, the existing slider mounting structure described above has significant technical defects in practical applications. Firstly, a portion of the adjusting shim is pressed between the connecting plate and the outer boom cylinder end face, causing the connecting plate to be locally raised at that point, while other areas of the connecting plate directly contact the outer boom cylinder end face. After the connecting plate is locked, uneven force distribution causes tilting deformation, which is directly transmitted to the slider, causing it to deflect. This prevents the slider from maintaining a uniform fit with the outer periphery of the inner boom cylinder, thus affecting the stability of the inner boom cylinder's telescopic movement, and in severe cases, causing shaking and jamming.

[0004] On the other hand, the tilt of the connecting plate alters the overall installation posture of the slider and the connecting plate, causing misalignment between the pre-set bolt mounting holes on the connecting plate and the corresponding holes on the outer boom end face. This makes it difficult to properly install the second fastener. In cases of severe misalignment, operators often have to enlarge the mounting holes to complete the assembly, significantly reducing assembly efficiency and on-site maintainability. Summary of the Invention

[0005] In view of the problems in the prior art where the connecting plate tilts and deforms due to local shimming, causing slider deflection and bolt hole misalignment, the present invention provides a slider assembly, telescopic arm, and working machine that can effectively prevent the pressure plate from tilting due to the shim setting, ensure uniform contact between the slider and the outer periphery of the inner arm cylinder, improve the stability of the telescopic movement of the inner arm cylinder, and at the same time avoid bolt hole misalignment and hole enlargement operation caused by the tilting of the pressure plate, thereby improving assembly efficiency and structural reliability.

[0006] In a first aspect, the present invention provides a slider assembly, comprising a pressure plate, a slider, a support, an adjusting shim, a first fastener, and a second fastener. The pressure plate has a pressing side; one end of the slider is provided with a flange edge, the flange edge having opposing first and second sides, the first side for abutting against the end face of an external boom, and the second side abutting against the pressing side; the outer periphery of the flange edge is provided with a first clearance groove, the groove wall of the first clearance groove and the pressing side forming a first receiving cavity; the support is located on the outer periphery of the flange edge, having opposing third and fourth sides, the third side being flush with the first side and for abutting against the end face of the external boom, and the fourth side abutting against the pressing side. The fourth side is provided with a second clearance groove, the groove wall of the second clearance groove and the pressure plate together form a second receiving cavity; the adjusting shim includes a first segment and a second segment connected to each other and forming an included angle, the first segment is partially received in the first receiving cavity and partially received in the second receiving cavity, and the second segment abuts against the outer peripheral side of the slider; the first fastener connects the pressure plate or the support member and is used to lock the adjusting shim; the second fastener connects the pressure plate, the support member and / or the flange edge, and is used to connect with the external boom.

[0007] It is understandable that the aforementioned external boom refers to the external boom of the telescopic boom.

[0008] During installation, the slider assembly provided by this invention has the first side of the flange and the third side of the support abutting against the end face of the outer boom cylinder, while the second side of the flange and the fourth side of the support abutting against the pressing side of the pressure plate. The pressure plate, support, and flange are then fixed to the end of the outer boom cylinder using a second fastener, positioning the slider at the inner wall of the outer boom cylinder end. The first section of the adjusting shim is housed within the first and second receiving cavities, and the second section abuts against the outer periphery of the slider.

[0009] When the slider position needs to be adjusted, release the first fastener from locking the adjusting shims, adjust the number of adjusting shims according to the actual needs, and then lock the adjusting shims with the first fastener to complete the adjustment.

[0010] The slider assembly provided by this invention, by housing the first section of the adjusting shim within the first and second receiving cavities, allows the pressure plate to directly adhere to the flange edge and the surface of the support without being locally raised by the adjusting shim. After the pressure plate is locked, the force is evenly distributed, effectively preventing pressure plate tilting and slider deflection. This ensures a tight fit between the slider and the outer periphery of the inner boom cylinder, significantly improving the smoothness of the inner boom cylinder's telescopic movement and eliminating shaking and jamming. Simultaneously, because the pressure plate does not tilt, for installation methods requiring hole alignment (such as threaded connections), the holes on the pressure plate and support for inserting mounting components will not misalign. Assembly can be completed without enlarging the holes, effectively improving assembly efficiency and on-site maintainability, and avoiding weakened connection strength due to hole enlargement.

[0011] Preferably, the support, the pressure plate, and the flange edge extend in the same direction.

[0012] The support, pressure plate, and flange extend in the same direction, which ensures that the clamping force of the pressure plate on the flange is evenly distributed along the length of the flange. The flange will not deform or warp due to uneven force, thus ensuring that the slider maintains the correct posture and does not tilt. The inner circumference of the slider can be evenly fitted with the outer circumference of the inner arm cylinder. At the same time, the fact that the three extend in the same direction also makes the overall structure compact and easy to process and assemble.

[0013] Preferably, the two ends of the flange edge in the length direction protrude from the two ends of the pressure plate in the length direction.

[0014] The flange protrudes beyond the pressure plate at both ends along its length, ensuring that the pressure plate ends do not extend beyond the flange ends but rest on them. This prevents the pressure plate edges from concentrating on the flange edges, allowing the flange ends that extend beyond the pressure plate's coverage area to rest directly on the boom end face. Consequently, the flange as a whole experiences both the pressure plate's clamping force and the boom end face's support force. The support points at both ends and the clamping point in the middle form a stable force-bearing structure, preventing warping and deformation due to concentrated force at the edges, thus enhancing the stability of the slider's posture.

[0015] Preferably, the two ends of the support member in the length direction are flush with the two ends of the pressure plate in the length direction.

[0016] The two ends of the support piece along its length are flush with the two ends of the pressure plate along its length, so that the pressure plate can completely cover the entire surface of the support piece. The clamping force of the pressure plate on the support piece is evenly distributed along the length of the support piece. At the same time, the edge of the pressure plate is supported by the support piece and will not bend or deform due to suspension. This ensures that the pressure plate is well stressed and maintains a flat posture, thereby ensuring the clamping effect of the pressure plate on the flange edge and facilitating the stability of the slider posture.

[0017] Preferably, the outer periphery of the support member is flush with the outer periphery of the pressure plate.

[0018] The outer periphery of the support is flush with the outer periphery of the pressure plate, ensuring that the entire outer edge of the pressure plate is supported by the support. This prevents the pressure plate edge from being suspended and causing localized bending deformation during tightening, ensuring uniform stress on the pressure plate and maintaining a flat posture. This, in turn, ensures the effective clamping of the pressure plate onto the flange edge and the support. Furthermore, the alignment and regular shape of the support with the pressure plate's edges help reduce the space occupied by the entire assembly on the boom end face, and also facilitates rapid alignment during machining and assembly.

[0019] Optionally, the first fastener and the first segment can be coupled in the following ways: the first fastener passes through the adjustment hole and can slide relative to the adjustment hole, and is locked and fixed by pressing against the surface of the first segment; or, the first fastener is an eccentric cam structure, and the eccentric part of the first fastener is pressed against or released by rotating the first fastener; or, the first fastener is a pin structure, and the first segment is provided with a plurality of positioning holes at intervals along its extension direction, and the first fastener is selectively inserted into any of the positioning holes to fix the position of the first segment; or, the first fastener is a set screw, and the set screw is threaded to the pressure plate or the support, and its end extends into the adjustment hole and presses against the hole wall or bottom of the adjustment hole to lock the adjustment shim.

[0020] Preferably, the extension direction of the first segment is perpendicular to the extension direction of the second segment.

[0021] The first and second segments form an L-shaped structure perpendicular to each other. When the adjusting shim is installed, the first segment is housed within the first and second receiving cavities, while the second segment extends perpendicular to the outer periphery of the slider and abuts against the outer periphery. Because the abutting direction of the second segment against the outer periphery of the slider is perpendicular to the extending direction of the first segment, when the first fastener locks the first segment, the locking force acts on the adjusting shim along the extending direction of the first segment, without affecting the abutting posture of the second segment. This ensures the stability and reliability of the adjusting shim's position and the slider's position.

[0022] Preferably, the adjusting shims are provided in multiples, and at least some of the adjusting shims are stacked sequentially. At least a portion of each of the first segments is located within the second receiving cavity. Each of the first segments is provided with an adjusting hole, which extends along the extension direction of the first segment. The first fastener includes a screw portion and a head. The screw portion passes through the adjusting hole and is threadedly connected to the pressure plate and the support member. The diameter of the screw portion is smaller than the extension length of the adjusting hole. The head abuts against the side of the pressure plate opposite to the support member.

[0023] The operator can adjust the total thickness of the first section by selecting and stacking an appropriate number of adjusting shims according to the actual gap between the slider and the inner arm cylinder, thereby achieving precise adjustment of the slider position. The adjustment method is flexible and does not require preparing multiple shims of different thicknesses; multi-level adjustment can be achieved simply by increasing or decreasing the number. Each adjusting shim has an adjusting hole in its first section and is fitted onto the threaded part of the same first fastener. During installation, all adjusting shims are stacked sequentially and locked in one go to complete the fixation, making the assembly process simple and quick. The diameter of the threaded part is smaller than the extension length of the adjusting hole, giving the first fastener a certain amount of tolerance when passing through each adjusting hole. Even if there is a slight relative misalignment between the adjusting shims when stacked, the threaded part can still pass smoothly through each adjusting hole without jamming, eliminating the need for hole enlargement and reducing assembly difficulty. The head of the first fastener abuts against the side of the pressure plate facing away from the support. When locked, the head applies a clamping force to the pressure plate, which then transmits this clamping force to each of the stacked adjusting shims, ensuring that the adjusting shims fit tightly together and between the adjusting shims and the support. This prevents relative movement between the layers and ensures that the adjusted position is stable and reliable.

[0024] Preferably, the outer periphery of the flange edge is provided with at least two first clearance grooves, the two first clearance grooves being located between the two ends of the flange edge along its length and the middle of the flange edge, and closer to the two ends of the flange edge; the fourth side is provided with at least two second clearance grooves, the positions of the second clearance grooves corresponding one-to-one with the positions of the first clearance grooves; the first fasteners are provided with at least two and correspond one-to-one with the first clearance grooves, at least a portion of the adjusting shims cooperate with one of the first clearance grooves and one of the second clearance grooves, and at least a portion of the adjusting shims cooperate with another first clearance groove and another second clearance groove.

[0025] Adjustable shims are installed at both ends of the flange along its length, allowing the slider to be adjusted independently at both ends. Operators can adjust the distance between the flange ends and the support components according to the actual fit between the slider and the inner boom cylinder. This compensates for uneven fit between the slider ends and the outer periphery of the inner boom cylinder caused by machining errors or assembly deviations, ensuring a uniform fit between the slider and the outer periphery of the inner boom cylinder, further improving the smoothness of the inner boom cylinder's telescopic movement. Simultaneously, the two adjusting shims are independently locked, preventing interference and ensuring stable and reliable adjustment.

[0026] Secondly, the present invention also provides a telescopic boom, which includes an inner boom cylinder, an outer boom cylinder, and a plurality of the aforementioned slider assemblies. The outer boom cylinder is slidably sleeved on the outside of the inner boom cylinder. The plurality of slider assemblies are arranged circumferentially at intervals along the end of the outer boom cylinder. The first side of the slider abuts against the end face of the outer boom cylinder, the third side of the support abuts against the end face of the outer boom cylinder, the second fastener is connected to the pressure plate, the support, and the outer boom cylinder, and the inner circumferential side of the slider abuts against the outer circumferential side of the inner boom cylinder.

[0027] The telescopic boom provided by this invention allows the inner boom cylinder to extend and retract relative to the outer boom cylinder. Multiple slider assemblies are arranged circumferentially at intervals along the end of the outer boom cylinder, providing support and guidance to the inner boom cylinder from multiple directions. This ensures balanced force distribution during extension and retraction, preventing radial movement or swaying, thereby further improving the smoothness and precision of the inner boom cylinder's extension and retraction. Each slider assembly is independently adjustable. Operators can adjust the position of each slider according to the actual contact between each slider and the outer periphery of the inner boom cylinder to compensate for uneven contact caused by processing errors or assembly deviations. This achieves uniform contact between each slider and the outer periphery of the inner boom cylinder, ensuring smooth extension and retraction of the inner boom cylinder under various working conditions and effectively preventing problems such as inner boom cylinder swaying, jamming, and abnormal noise.

[0028] Thirdly, the present invention also provides a working machine, which includes a mechanical body and the aforementioned telescopic arm, wherein the telescopic arm is mounted on the mechanical body.

[0029] The working machine provided by this invention has the aforementioned telescopic boom installed on the main body of the working machine, and the working range is changed by the telescopic boom's extension and retraction. During the operation of the telescopic boom, the outer boom cylinder is fixed, and the inner boom cylinder extends and retracts axially inside the outer boom cylinder. Multiple slider assemblies set at the inner wall of the end of the outer boom cylinder provide support and guidance for the inner boom cylinder in various circumferential directions, ensuring that the inner boom cylinder moves smoothly during the extension and retraction process.

[0030] When the telescopic boom has been used for a long time and a gap appears between the slider and the inner boom cylinder due to wear, or when the slider position needs to be adjusted during new assembly, the operator does not need to disassemble the telescopic boom. He only needs to release the first fastener locking the adjusting shim for the slider assembly that needs to be adjusted, adjust the number of adjusting shims, so that the inner circumference of the slider is tightly fitted with the outer circumference of the inner boom cylinder again, and then tighten it to complete the adjustment.

[0031] The aforementioned operating machinery includes, but is not limited to, cranes, aerial work platforms, fire trucks, aerial platform trucks, bridge inspection vehicles, tunnel trolleys, and concrete pump truck booms.

[0032] The beneficial effects of this invention are as follows: By setting a flange at the end of the slider and a support on the outer periphery of the flange, the flange and the support are pressed together against the end face of the boom cylinder by a pressure plate. At the same time, clearance grooves are opened on the flange and the support, so that the clearance grooves and the pressure plate form a receiving cavity. The first section of the adjusting shim is slidably received in the receiving cavity, so that the pressure plate can directly fit against the surface of the flange and the support without being locally raised by the adjusting shim. After the pressure plate is locked, the force is uniform, which can effectively prevent the pressure plate from tilting and the slider from deflecting, ensuring that the slider and the outer periphery of the inner boom cylinder are tightly fitted, significantly improving the stability of the inner boom cylinder's telescopic movement and eliminating shaking and jamming. At the same time, since the pressure plate will not tilt, for installation methods that require hole alignment (such as threaded connection), the holes on the pressure plate and the support for inserting the second fastener will not be misaligned, and assembly can be completed without enlarging the holes, which can effectively improve assembly efficiency and on-site maintainability, and avoid weakening of connection strength due to hole enlargement. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram showing the arrangement of the slider assembly at the end of the outer boom cylinder; Figure 2 This is a schematic diagram of the slider assembly installation. Figure 3 A cross-sectional view of the telescopic arm provided in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the fit between the support and the flange edge; Figure 5 This is a partial cross-sectional view of the telescopic arm provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. Pressure plate; 2. Slider; 3. Flange edge; 301. First clearance groove; 4. Support; 401. Second clearance groove; 5. Adjusting shim; 501. First section; 5011. Adjusting hole; 502. Second section; 6. First fastener; 601. Screw part; 602. Head; 7. Second fastener; 8. First anti-loosening washer; 9. Second anti-loosening washer; 10. Inner arm cylinder; 11. Outer arm cylinder. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, in one aspect, a slider assembly is provided, combined with Figures 1 to 5 As shown, it includes a pressure plate 1, a slider 2, a support 4, an adjusting shim 5, a first fastener 6, and a second fastener 7. The pressure plate 1 has a pressing side; one end of the slider 2 is provided with a flange 3, which is integrally formed with the slider 2. The flange 3 has a first side and a second side, the first side is used to abut against the end face of the external boom, and the second side is fitted against the pressing side. The outer periphery of the flange 3 is provided with a first clearance groove 301, the groove wall of the first clearance groove 301 and the pressing side enclose a first receiving cavity; the support 4 is located on the outer periphery of the flange 3, and has a third side and a fourth side, the third side is flush with the first side and is used to abut against the end face of the external boom, and the fourth side is fitted against the pressing side. The fourth side is provided with a second relief groove 401, and the groove wall of the second relief groove 401 and the pressure plate 1 form a second receiving cavity; the adjusting shim 5 includes a first section 501 and a second section 502 that are connected to each other and form an included angle. The first section 501 is partially housed in the first receiving cavity and partially housed in the second receiving cavity. The second section 502 abuts against the outer periphery of the slider 2; the first fastener 6 connects the pressure plate 1 or the support 4 and is used to lock the adjusting shim 5; the second fastener 7 connects the pressure plate 1, the support 4 and / or the flange edge 3 and is used to connect with the external boom.

[0039] It is understood that the aforementioned external boom refers to the external boom 11 of the telescopic boom.

[0040] In this embodiment, during installation, the first side of the flange 3 and the third side of the support 4 abut against the end face of the outer boom cylinder 11, while the second side of the flange 3 and the fourth side of the support 4 are respectively attached to the pressing side of the pressure plate 1. The pressure plate 1, the support 4, and the flange 3 are jointly fixed to the end of the outer boom cylinder 11 by the second fastener 7, so that the slider 2 is located on the inner wall of the end of the outer boom cylinder 11. The first section 501 of the adjusting shim 5 is accommodated in the first and second receiving cavities, and the second section 502 abuts against the outer periphery of the slider 2.

[0041] When the position of slider 2 needs to be adjusted, release the first fastener 6 from locking the adjusting shim 5, adjust the number of adjusting shims 5 according to actual needs, and then lock the adjusting shims 5 with the first fastener 6 to complete the adjustment.

[0042] The slider assembly provided in this embodiment, by housing the first section 501 of the adjusting shim 5 within the first and second receiving cavities, allows the pressure plate 1 to directly adhere to the surfaces of the flange edge 3 and the support 4 without being locally raised by the adjusting shim 5. After the pressure plate 1 is locked, the force is evenly distributed, effectively preventing the pressure plate 1 from tilting and the slider 2 from deflecting. This ensures a tight fit between the slider 2 and the outer periphery of the inner arm cylinder 10, significantly improving the stability of the telescopic movement of the inner arm cylinder 10 and eliminating shaking and jamming. Simultaneously, since the pressure plate 1 does not tilt, for installation methods requiring hole alignment (such as threaded connections), the holes on the pressure plate 1 and the support 4 used for inserting the mounting components will not be misaligned. Assembly can be completed without enlarging the holes, effectively improving assembly efficiency and on-site maintainability, and avoiding weakening of connection strength due to hole enlargement.

[0043] Specifically, the pressure plate 1 is provided with multiple first threaded holes, and the support 4 is provided with multiple second threaded holes. The positions of the first threaded holes and the second threaded holes correspond one-to-one. Multiple second fasteners 7 are provided and correspond one-to-one with the first threaded holes. The second fasteners 7 are bolts. The bolts are threadedly connected to their corresponding first threaded holes and second threaded holes. The ends of the bolts are used to thread-connect with the threaded holes on the end face of the outer boom, so as to press and fix the pressure plate 1, the support 4 and the flange edge 3 together to the end face of the outer boom.

[0044] Specifically, a first anti-loosening washer 8 is provided between one end of the second fastener 7 and the pressure plate 1. The first anti-loosening washer 8 is sleeved on the outer periphery of the rod of the second fastener 7 to prevent the second fastener 7 from loosening under vibration conditions.

[0045] Furthermore, the support 4, pressure plate 1, and flange edge 3 extend in the same direction, all forming an arc-shaped structure.

[0046] The support 4, pressure plate 1, and flange edge 3 extend in the same direction, so that the clamping force of pressure plate 1 on flange edge 3 is evenly distributed along the length of flange edge 3. Flange edge 3 will not be deformed or warped due to uneven force, thus ensuring that slider 2 maintains the correct posture and does not tilt. The inner circumference of slider 2 can be evenly fitted with the outer circumference of inner arm cylinder 10. At the same time, the fact that the three extend in the same direction also makes the overall structure compact and easy to process and assemble.

[0047] Furthermore, the two ends of the flange edge 3 protrude from the two ends of the pressure plate 1 along its length.

[0048] Both ends of the flange edge 3 protrude beyond the ends of the pressure plate 1 along its length, ensuring that the ends of the pressure plate 1 do not extend beyond the ends of the flange edge 3, but instead rest on the flange edge 3. This prevents the pressure force exerted by the edge of the pressure plate 1 on the flange edge 3 from concentrating at the end edges of the flange edge 3. The portions of the flange edge 3 extending beyond the coverage area of ​​the pressure plate 1 are directly supported on the end face of the boom. Consequently, the flange edge 3 is subjected to both the pressure force from the pressure plate 1 and the supporting force from the end face of the boom. The support points at both ends and the pressure point in the middle form a stable force-bearing structure, preventing the flange edge 3 from warping due to concentrated force at the edges, thus enhancing the stability of the slider 2.

[0049] Furthermore, the two ends of the support member 4 in the length direction are flush with the two ends of the pressure plate 1 in the length direction.

[0050] The two ends of the support 4 along its length are flush with the two ends of the pressure plate 1 along its length, so that the pressure plate 1 can completely cover the entire surface of the support 4. The pressing force of the pressure plate 1 on the support 4 is evenly distributed along the length of the support 4. At the same time, the edge of the pressure plate 1 is supported by the support 4 and will not bend or deform due to suspension, ensuring that the pressure plate 1 is well stressed and maintains a flat posture, thereby ensuring the pressing effect of the pressure plate 1 on the flange edge 3, which is beneficial to the stability of the slider 2.

[0051] Furthermore, the outer periphery of the support 4 is flush with the outer periphery of the pressure plate 1.

[0052] The outer periphery of the support 4 is flush with the outer periphery of the pressure plate 1, ensuring that the entire outer periphery of the pressure plate 1 is supported by the support 4. This prevents the edge of the pressure plate 1 from being suspended and causing local bending deformation during locking, ensuring that the pressure plate 1 is subjected to uniform force and maintains a flat posture. This, in turn, ensures the effective clamping of the pressure plate 1 onto the flange edge 3 and the support 4. At the same time, the alignment of the support 4 with the edge of the pressure plate 1 and its regular shape help reduce the space occupied by the entire assembly on the end face of the boom, and also facilitates quick alignment during processing and assembly.

[0053] Optionally, a positioning structure is provided between the pressure plate 1 and the support member 4 to cooperate with each other. The positioning structure is used for quick alignment when the pressure plate 1 and the support member 4 are assembled. For example, the positioning structure is a positioning protrusion provided on the pressure plate 1 and a positioning groove provided on the support member 4. The positioning protrusion and the positioning groove are positioned correspondingly and matched in shape. Alternatively, the positioning structure is a positioning hole provided on the pressure plate 1 and a positioning pin provided on the support member 4. The positioning pin passes through the positioning hole. Alternatively, the positioning structure is a positioning step surface provided on the edge of the pressure plate 1 and the support member 4 to cooperate with each other.

[0054] Optionally, the first fastener 6 and the first segment 501 are coupled in the following ways: the first fastener 6 passes through the adjustment hole 5011 and can slide relative to the adjustment hole 5011, and is locked and fixed by pressing against the surface of the first segment 501; or, the first fastener 6 is an eccentric cam structure, and the eccentric part of the first fastener 6 is pressed against or released by rotating the first fastener 6; or, the first fastener 6 is a pin structure, and the first segment 501 is provided with a plurality of positioning holes at intervals along its extension direction, and the first fastener 6 is selectively inserted into any positioning hole to fix the position of the first segment 501; or, the first fastener 6 is a set screw, and the set screw is threaded to the pressure plate 1 or the support 4, and its end extends into the adjustment hole 5011 and presses against the hole wall or bottom of the adjustment hole 5011 to lock the adjustment shim 5.

[0055] Furthermore, the extension direction of the first segment 501 is perpendicular to the extension direction of the second segment 502.

[0056] The first segment 501 and the second segment 502 form an L-shaped structure perpendicular to each other. When the adjusting shim 5 is installed, the first segment 501 is housed within the first and second receiving cavities, and the second segment 502 extends perpendicular to the outer periphery of the slider 2 and abuts against the outer periphery of the slider 2. Since the abutting direction of the second segment 502 against the outer periphery of the slider 2 is perpendicular to the extending direction of the first segment 501, when the first fastener 6 locks the first segment 501, the locking force acts on the adjusting shim 5 along the extending direction of the first segment 501, without affecting the abutting posture of the second segment 502. This ensures the stable and reliable position of the adjusting shim 5 and the slider 2.

[0057] Furthermore, the adjusting shims 5 are provided in multiple and at least some of the adjusting shims 5 are stacked in sequence. Each of the first segments 501 is located at least partially in the second receiving cavity. Each of the first segments 501 is provided with an adjusting hole 5011, which extends along the extension direction of the first segment 501. The first fastener 6 includes a screw portion 601 and a head 602. The screw portion 601 passes through the adjusting hole 5011 and is threadedly connected to the pressure plate 1 and the support member 4. The diameter of the screw portion 601 is smaller than the extension length of the adjusting hole 5011. The head 602 abuts against the side of the pressure plate 1 facing away from the support member 4.

[0058] Specifically, the pressure plate 1 is provided with a third threaded hole, the support 4 is provided with a fourth threaded hole corresponding to the position of the third threaded hole, and the screw part 601 is threadedly connected to both the third threaded hole and the fourth threaded hole.

[0059] The operator can adjust the total thickness of the first section 501 by selecting and stacking an appropriate number of adjusting shims 5 according to the actual gap between the slider 2 and the inner arm cylinder 10, thereby achieving precise adjustment of the slider 2 position. The adjustment method is flexible and does not require the preparation of multiple shims of different thicknesses; multi-level adjustment can be achieved simply by increasing or decreasing the number. Each adjusting shim 5 has an adjusting hole 5011 in its first section 501 and is fitted onto the screw part 601 of the same first fastener 6. During installation, all adjusting shims 5 are stacked in sequence and locked at once to complete the fixation, making the assembly process simple and quick. The diameter of the screw part 601 is smaller than the extension length of the adjusting hole 5011, giving the first fastener 6 a certain margin of error when passing through each adjusting hole 5011. Even if there is a slight relative misalignment between the adjusting shims 5 when stacked, the screw part 601 can still pass smoothly through each adjusting hole 5011 without jamming, eliminating the need for hole enlargement and reducing assembly difficulty. The head 602 of the first fastener 6 abuts against the side of the pressure plate 1 facing away from the support 4. When locked, the head 602 applies a clamping force to the pressure plate 1, and the pressure plate 1 transmits the clamping force to each of the stacked adjusting shims 5, so that each adjusting shim 5 and the adjusting shim 5 and the support 4 fit tightly together, and there will be no relative movement between the layers, which can ensure that the position after adjustment is stable and reliable.

[0060] Furthermore, a second anti-loosening washer 9 is provided between the head 602 of the first fastener 6 and the pressure plate 1. The second anti-loosening washer 9 is sleeved on the outer periphery of the screw part 601 to prevent the first fastener 6 from loosening under vibration conditions.

[0061] Optionally, the inner circumferential side of the slider 2 is provided with a friction-reducing structure. The friction-reducing structure can be a solid lubricant layer disposed on the inner circumferential side of the slider 2, or a friction-reducing coating applied to the inner circumferential side of the slider 2, in order to reduce the sliding friction between the slider 2 and the external structure.

[0062] Furthermore, two first clearance grooves 301 are provided on the outer periphery of the flange edge 3. The two first clearance grooves 301 are respectively located between the two ends of the flange edge 3 in the length direction and the middle of the flange edge 3, and closer to the two ends of the flange edge 3. Two second clearance grooves 401 are provided on the fourth side. The positions of the second clearance grooves 401 and the first clearance grooves 301 correspond one-to-one. At least two adjusting shims 5 and first fasteners 6 are provided. The adjusting shims 5 correspond to and cooperate with the first clearance grooves 301 and the second clearance grooves 401.

[0063] Adjustable shims 5 are installed at both ends of the flange edge 3 along its length, allowing the slider 2 to be independently adjusted at both ends of the flange edge 3. Operators can adjust the distance between the flange edge 3 and the support shims 4 according to the actual fit between the slider 2 and the inner arm cylinder 10. This compensates for uneven fit between the slider 2 and the outer periphery of the inner arm cylinder 10 due to machining errors or assembly deviations, ensuring uniform fit between the slider 2 and the outer periphery of the inner arm cylinder 10, further improving the smoothness of the telescopic movement of the inner arm cylinder 10. Simultaneously, the two adjusting shims 5 are independently locked, preventing interference and ensuring stable and reliable adjustment. Of course, the number of the first clearance groove 301 and the second clearance groove 401 is not limited to two; it can also be three, four, etc., depending on actual needs.

[0064] On the other hand, embodiments of the present invention also provide a telescopic arm, which includes an inner arm cylinder 10, an outer arm cylinder 11, and multiple sets of slider assemblies from the previous embodiment. The outer arm cylinder 11 is slidably sleeved on the outside of the inner arm cylinder 10. Multiple sets of slider assemblies are arranged circumferentially at intervals along the end of the outer arm cylinder 11. The first side of the slider 2 abuts against the end face of the outer arm cylinder 11, the third side of the support 4 abuts against the end face of the outer arm cylinder 11, the second fastener 7 is connected to the pressure plate 1, the support 4, and the outer arm cylinder 11, and the inner circumferential side of the slider 2 fits against the outer circumferential side of the inner arm cylinder 10.

[0065] In this embodiment, the telescopic boom has an inner boom cylinder 10 that can extend and retract relative to the outer boom cylinder 11. Multiple slider assemblies are arranged circumferentially at intervals along the end of the outer boom cylinder 11, providing support and guidance to the inner boom cylinder 10 from multiple directions. This ensures balanced force distribution on the inner boom cylinder 10 during extension and retraction, preventing radial movement or swaying, thereby improving the stability and accuracy of the inner boom cylinder 10's extension and retraction. Each slider assembly is independently adjustable. The operator can adjust the position of each slider 2 according to the actual contact between each slider 2 and the outer periphery of the inner boom cylinder 10, compensating for uneven contact caused by processing errors or assembly deviations. This achieves uniform contact between each slider 2 and the outer periphery of the inner boom cylinder 10, ensuring smooth extension and retraction of the inner boom cylinder 10 under various working conditions, effectively preventing problems such as shaking, jamming, and abnormal noise of the inner boom cylinder 10.

[0066] The number of slider assemblies can be determined according to the cross-sectional shape of the inner cavity of the outer boom cylinder 11. When the cross-section of the inner cavity of the outer boom cylinder 11 is rectangular or rhomboid, the slider assemblies are respectively set at each apex corner of the end of the outer boom cylinder 11, and the apex corners are arc-shaped. When the cross-section of the inner cavity of the outer boom cylinder 11 is circular, multiple sets of slider assemblies are evenly spaced along the circumference of the end of the outer boom cylinder 11. For example, four sets of slider assemblies are set, and the four sets of slider assemblies are evenly distributed along the circumference at 90° intervals. When the cross-section of the inner cavity of the outer boom cylinder 11 is U-shaped, the slider assemblies are respectively set at the two inner apex corners of the end of the outer boom cylinder 11, and the inner apex corners are arc-shaped.

[0067] With this configuration, the slider assemblies are respectively arranged at key stress points on the inner wall of the outer boom cylinder 11 end (such as the apex corner of a rectangle or rhombus, the circumferentially evenly distributed points of a circular cross-section, and the inner apex corner of a U-shaped cross-section), providing effective support to the inner boom cylinder 10 from multiple directions. This ensures that the inner boom cylinder 10 is subjected to balanced forces during extension and retraction, preventing excessive local stress from causing uneven wear of the slider 2 or swaying of the inner boom cylinder 10. At the same time, the arc-shaped corner structure can prevent stress concentration between the slider 2 and the inner wall of the outer boom cylinder 11, which helps protect the inner wall of the outer boom cylinder 11 and the slider 2, and extends their service life.

[0068] In this embodiment, the cross-section of the inner cavity of the outer arm cylinder 11 is U-shaped, and the slider assembly is respectively disposed at the two inner apex corners of the end of the outer arm cylinder 11, and the inner apex corners are arc-shaped.

[0069] In another aspect, embodiments of the present invention also provide a working machine, which includes a machine body and a telescopic arm as described in the previous embodiment, the telescopic arm being mounted on the machine body.

[0070] The working machine provided in this embodiment has the aforementioned telescopic boom installed on the main body of the working machine, and the working range is changed by the telescopic boom's extension and retraction. During the operation of the telescopic boom, the outer boom cylinder 11 is fixed, and the inner boom cylinder 10 extends and retracts axially inside the outer boom cylinder 11. Multiple slider assemblies set at the inner wall of the end of the outer boom cylinder 11 provide support and guidance for the inner boom cylinder 10 from all circumferential directions, ensuring that the inner boom cylinder 10 moves smoothly during the extension and retraction process.

[0071] When the telescopic arm has been used for a long time, and a gap appears between the slider 2 and the inner arm cylinder 10 due to wear, or when the position of the slider 2 needs to be adjusted during new assembly, the operator does not need to disassemble the telescopic arm. Instead, for the slider assembly that needs to be adjusted, the operator only needs to release the locking of the first fastener 6 to the adjusting shim 5, adjust the number of adjusting shims 5, so that the inner circumference of the slider 2 is tightly fitted to the outer circumference of the inner arm cylinder 10 again, and then lock it to complete the adjustment.

[0072] The aforementioned operating machinery includes, but is not limited to, cranes, aerial work platforms, fire trucks, aerial platform trucks, bridge inspection vehicles, tunnel trolleys, and concrete pump truck booms.

[0073] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A slider assembly, characterized in that, include: Pressure plate (1) has a pressing side; The slider (2) has a flange edge (3) at one end. The flange edge (3) has a first side and a second side. The first side is used to abut against the end face of the outer arm cylinder, and the second side is in contact with the pressing side. The outer periphery of the flange edge (3) is provided with a first relief groove (301). The groove wall of the first relief groove (301) and the pressing side enclose a first receiving cavity. The support member (4) is located on the outer periphery of the flange edge (3) and has a third side and a fourth side. The third side is flush with the first side and is used to abut against the end face of the outer boom. The fourth side is in close contact with the pressing side. The fourth side is provided with a second relief groove (401). The groove wall of the second relief groove (401) and the pressure plate (1) enclose a second receiving cavity. The adjusting shim (5) includes a first segment (501) and a second segment (502) that are connected to each other and form an angle. The first segment (501) is partially housed in the first receiving cavity and partially housed in the second receiving cavity. The second segment (502) abuts against the outer periphery of the slider (2). The first fastener (6) connects the pressure plate (1) and / or the support (4) and is used to lock the adjusting shim (5); The second fastener (7) connects the pressure plate (1), the support (4) and / or the flange edge (3) and is used for connection with the external boom.

2. The slider assembly according to claim 1, characterized in that, The support (4), the pressure plate (1), and the flange edge (3) extend in the same direction.

3. The slider assembly according to claim 2, characterized in that, The flange edge (3) protrudes from both ends of the pressure plate (1) along its length.

4. The slider assembly according to claim 2, characterized in that, The two ends of the support member (4) in the length direction are flush with the two ends of the pressure plate (1) in the length direction.

5. The slider assembly according to claim 1, characterized in that, The outer periphery of the support member (4) is flush with the outer periphery of the pressure plate (1).

6. The slider assembly according to claim 1, characterized in that, The extension direction of the first segment (501) is perpendicular to the extension direction of the second segment (502).

7. The slider assembly according to claim 6, characterized in that, The adjusting pads (5) are provided in multiple and at least some of the adjusting pads (5) are stacked in sequence. Each of the first segments (501) is located at least partially in the second receiving cavity. Each of the first segments (501) is provided with an adjusting hole (5011), and the adjusting hole (5011) extends along the extending direction of the first segment (501). The first fastener (6) includes a screw portion (601) and a head (602). The screw portion (601) passes through the adjustment hole (5011) and is threadedly connected to the pressure plate (1) and the support member (4). The diameter of the screw portion (601) is smaller than the extension length of the adjustment hole (5011). The head (602) abuts against the side of the pressure plate (1) facing away from the support member (4).

8. The slider assembly according to claim 7, characterized in that, At least two first clearance grooves (301) are provided on the outer periphery of the flange edge (3). The two first clearance grooves (301) are respectively located between the two ends of the flange edge (3) in the length direction and the middle part of the flange edge (3), and closer to the two ends of the flange edge (3). At least two second clearance grooves (401) are provided on the fourth side, and the positions of the second clearance grooves (401) correspond one-to-one with the positions of the first clearance grooves (301); The first fastener (6) is provided with at least two and corresponds one-to-one with the first clearance groove (301). At least a portion of the adjusting shims (5) cooperate with one of the first clearance grooves (301) and one of the second clearance grooves (401), and at least a portion of the adjusting shims (5) cooperate with another first clearance groove (301) and another second clearance groove (401).

9. A telescopic arm, characterized in that, include: Inner arm tube (10); The outer arm tube (11) is slidably sleeved on the outside of the inner arm tube (10); Multiple sets of slider assemblies according to any one of claims 1 to 8, wherein multiple sets of slider assemblies are arranged circumferentially at intervals along the end of the outer arm cylinder (11), the first side of the slider (2) abuts against the end face of the outer arm cylinder (11), the third side of the support member (4) abuts against the end face of the outer arm cylinder (11), the second fastener (7) is connected to the pressure plate (1), the support member (4) and the outer arm cylinder (11), and the inner circumferential side of the slider (2) fits against the outer circumferential side of the inner arm cylinder (10).

10. A type of operating machinery, characterized in that, include: Mechanical body; The telescopic arm as described in claim 9 is mounted on the mechanical body.

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