A folding crane arm telescopic oil cylinder assembly connection structure
Patent Information
- Application Number
- CN202610946863.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-29
- Publication Date
- 2026-09-25
AI Technical Summary
[0003]现有折叠式伸缩臂的伸臂油缸均布置于臂体上方，部件相互间隙小，容易在运动过程中发生干涉，对装配精度要求高；油缸安装点位于缸筒后部区域，油缸全伸后压杆稳定性差，更易失稳弯曲；基本臂偏心座材料利用率不高
1、本发明提供的伸缩油缸装配连接结构，将伸缩油缸的缸筒一端安装在偏心座的工艺孔内，提高空间利用率，缸筒靠近缸杆的一端安装在箱型臂体上，安装点靠近缸杆，在缸杆伸出时，更加稳定，提高装置稳定性。偏心座的工艺孔同时作为减重孔，减少装置整体重量。
Smart Images
Figure CN122809349A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of telescopic booms, and more particularly to an assembly and connection structure for the telescopic cylinder of a folding crane boom. Background Technology
[0002] Folding cranes have a compact boom structure, especially multi-section telescopic boom products. Multiple hydraulic cylinders and piping need to be arranged on the boom, resulting in small gaps between components within the limited space, making them prone to interference during movement. Therefore, making efficient use of the external boom space is a pressing issue. Simultaneously, as lifting equipment, structural weight is a key factor balancing production cost and load-bearing capacity; therefore, reducing weight through reasonable structural design is also crucial. Furthermore, while optimizing space utilization and weight reduction, the reliability of structural components must also be guaranteed.
[0003] The existing folding telescopic booms have their extension cylinders all located on the top of the boom body. The small gaps between the components make them prone to interference during movement, requiring high assembly precision. The cylinder mounting point is located in the rear area of the cylinder barrel, resulting in poor stability of the pressure rod after the cylinder is fully extended, making it more prone to instability and bending. The material utilization rate of the basic boom eccentric seat is also low. Summary of the Invention
[0004] The purpose of this invention is to provide an assembly and connection structure for the telescopic hydraulic cylinder of a folding crane boom, in which one end of the cylinder is installed in a process hole, thereby improving the structural compactness.
[0005] To solve the above technical problems, the following technical solution is adopted: This invention provides an assembly and connection structure for a telescopic hydraulic cylinder of a folding crane boom, including a telescopic hydraulic cylinder, wherein the cylinder barrel of the telescopic hydraulic cylinder is mounted on the basic boom, and the cylinder rod is connected to the telescopic boom; The basic arm includes a box-shaped arm body and an eccentric seat. The eccentric seat has a process hole, which is arranged along the length direction of the basic arm. The end of the cylinder barrel furthest from the cylinder rod extends into the process hole, while the end of the cylinder barrel closest to the cylinder rod is mounted on the box-shaped arm.
[0006] Optionally, a mounting seat for mounting a cylinder is provided at one end of the box-shaped boom near the telescopic boom, and the mounting seat is provided with a mounting slot, which is aligned with the process hole; The cylinder is provided with a support block, and the mounting slot has a mounting hole, which is engaged with the support block. The mounting slot is also provided with a limiting block for limiting the position of the support block.
[0007] Optionally, the mounting base is provided with a first baffle and a second baffle, and the first baffle, the second baffle and the mounting base form the U-shaped mounting slot; The mounting holes include a first mounting hole provided on the first baffle and a second mounting hole provided on the second baffle; The support blocks on both sides of the cylinder barrel are respectively fitted with the first mounting hole and the second mounting hole.
[0008] Optionally, the limiting block includes a first limiting block mounted on a first baffle and a second limiting block mounted on a second baffle. The first limiting block is mounted on the end face of the first baffle away from the mounting seat by countersunk bolts, and the second limiting block is mounted on the inner side of the second baffle by hexagonal head bolts.
[0009] Optionally, the first mounting hole is an open structure extending to the end face of the first baffle, and the second mounting hole is a closed structure.
[0010] Optionally, the first limiting block is a T-shaped structure, with one end of the first limiting block extending into the first mounting hole from the end face opening of the first mounting hole to limit the support block inside the first mounting hole.
[0011] Optionally, the second limiting block is provided with a stop structure that protrudes to the side, the stop structure extending into the second mounting hole to limit the support block in the second mounting hole.
[0012] Optionally, the cylinder rod is hinged to the telescopic arm via a connecting pin. The connecting pin includes a light shaft and a retaining plate. The retaining plate is disposed at one end of the light shaft and has mounting holes. The mounting holes cooperate with the telescopic arm via fasteners.
[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The telescopic cylinder assembly and connection structure provided by this invention installs one end of the telescopic cylinder barrel in the process hole of the eccentric seat, improving space utilization. The end of the cylinder barrel near the cylinder rod is installed on the box-shaped arm, with the installation point close to the cylinder rod, making it more stable when the cylinder rod extends, thus improving the stability of the device. The process hole of the eccentric seat also serves as a weight-reduction hole, reducing the overall weight of the device.
[0014] 2. The telescopic cylinder assembly and connection structure provided by the present invention uses the upper support block of the cylinder, the mounting slot on the box-type boom, the first limiting block and the second limiting block to limit the cylinder installation. The second limiting block is provided with a stop structure that extends into the second mounting hole. When the upper support block of the cylinder applies pressure to the second limiting block, the pressure is transmitted to the second baffle through the stop structure, thereby reducing the shear force on the hexagonal head bolt and improving the service life of the device. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall assembly and connection structure of the telescopic hydraulic cylinder in an embodiment of the present invention; Figure 2This is a schematic diagram showing the disassembled assembly and connection structure of the telescopic hydraulic cylinder in an embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting slot and cylinder cross-section in an embodiment of the present invention; Figure 4 This is a schematic diagram of the mounting slot structure on the mounting base in an embodiment of the present invention; Figure 5 This is a schematic diagram of the first limiting block structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the second limiting block structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connecting pin structure in an embodiment of the present invention.
[0016] Explanation of reference numerals in the attached figures: 1. Basic boom; 2. Telescopic boom; 3. Telescopic cylinder; 31. Cylinder barrel; 32. Cylinder rod; 33. Support block; 4. Eccentric seat; 41. Process hole; 5. Box-type boom body; 6. Mounting seat; 61. First baffle; 62. Second baffle; 63. First mounting hole; 64. Second mounting hole; 7. Mounting slot; 71. First limit block; 72. Second limit block; 73. Countersunk bolt; 74. Hexagonal head bolt; 8. Connecting pin; 81. Optical shaft; 82. Clamping plate; 83. Mounting hole. Detailed Implementation
[0017] 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, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.
[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0019] Example 1
[0020] This embodiment provides an assembly and connection structure for a telescopic hydraulic cylinder 3 of a folding crane boom, including a telescopic hydraulic cylinder 3. The telescopic hydraulic cylinder 3 includes a cylinder barrel 31 and a cylinder rod 32. The cylinder barrel 31 is mounted on a basic boom 1, and the cylinder rod 32 is connected to the telescopic boom 2. The basic boom 1 includes a box-shaped boom body 5 and an eccentric seat 4. The eccentric seat 4 has a process hole 41, which is arranged along the length direction of the basic boom 1. One end of the cylinder barrel 31 extends into the process hole 41, and the other end is mounted on the end of the box-shaped boom body 5.
[0021] The eccentric seat 4 is set along the length of the box-shaped arm 5. The process hole 41 on the eccentric seat 4 serves as a structural weight reduction hole to reduce the overall weight of the basic arm 1.
[0022] A mounting base 6 is provided at the end of the box-shaped arm 5. The mounting base 6 is provided with a mounting slot 7, which is aligned with the process hole 41. The cylinder 31 is engaged with the mounting slot 7.
[0023] A support block 33 is provided on the cylinder barrel 31. The support block 33 is located on the side wall of the cylinder barrel 31 near the end. There are two support blocks 33, which are arranged at a 180° angle. The mounting slot 7 is provided with mounting holes that mate with the support blocks 33. The two mounting holes mate with the two support blocks 33 respectively, so that the cylinder barrel 31 can be mounted on the basic arm 1.
[0024] Limiting blocks are also provided on the mounting slot 7. The two limiting blocks cooperate with the two mounting holes respectively to limit the support block 33 in the mounting hole. This enables the installation of the cylinder 31.
[0025] In this embodiment, the telescopic cylinder 3 is set in the process hole 41 of the eccentric seat 4, which improves the structural compactness and the utilization rate of structural space. The setting of the process hole 41 reduces the structural weight. A support block 33 is set at the end of the cylinder barrel 31 near the cylinder rod 32 and installed in the mounting slot 7. The mounting point of the cylinder barrel 31 is located at the end near the cylinder rod 32, which can improve the stability when the cylinder rod 32 is extended, and realize the stability of the cylinder barrel 31 installation.
[0026] Example 2
[0027] This embodiment provides an assembly and connection structure for the telescopic cylinder 3 of a folding crane boom, based on Embodiment 1.
[0028] like Figure 1 , Figure 2 As shown, the mounting base 6 is located at the end of the box-shaped boom 5 near the telescopic boom 2, and the cylinder 31 is provided with a support block 33. The cylinder 31 is installed in the mounting slot 7 of the mounting base 6 through the support block 33.
[0029] like Figure 4 As shown, the mounting base 6 is provided with a first baffle 61 and a second baffle 62. The first baffle 61, the second baffle 62, and the mounting base 6 form a U-shaped mounting groove 7. The cylinder 31 is disposed through the front and rear ends of the mounting groove 7. Arc-shaped structures adapted to the cylinder 31 are provided on the front and rear sides of the mounting groove 7. The first baffle 61 and the second baffle 62 are respectively on the left and right sides of the mounting groove 7. The lower end of the mounting groove 7 is the mounting base 6, and the upper end is an open structure. The telescopic cylinder 3 is inserted into the upper open structure of the mounting groove 7.
[0030] Two support blocks 33 are provided at one end of the cylinder 31 near the cylinder rod 32. The support blocks 33 are cuboid in shape and their size is adapted to the mounting holes.
[0031] like Figure 4 As shown, the mounting holes include a first mounting hole 63 and a second mounting hole 64. The first mounting hole 63 is disposed on the first baffle 61, and the second mounting hole 64 is disposed on the second baffle 62. The limiting block includes a first limiting block 71 and a second limiting block 72. The first limiting block 71 is mounted on the first baffle 61 and cooperates with the first mounting hole 63, and the second limiting block 72 is mounted on the second baffle 62 and cooperates with the second mounting hole 64.
[0032] like Figure 4As shown, the first baffle 61 and the second baffle 62 are located on two opposite sides of the mounting base 6, and the cylinder 31 is disposed between the first baffle 61 and the second baffle 62.
[0033] like Figure 4 As shown, the first mounting hole 63 is an open structure extending to the end face of the first baffle 61, and the second mounting hole 64 is a closed structure. Both the first mounting hole 63 and the second mounting hole 64 are square structures, which are adapted to the support block 33 on the cylinder 31.
[0034] like Figure 2 , Figure 5 As shown, the first limiting block 71 is installed on the end face of the first baffle 61. The first limiting block 71 has a T-shaped structure, including a horizontal end and a vertical end. The vertical end of the first limiting block 71 extends into the first mounting hole 63 from the opening on the end face of the first baffle 61. The width of the vertical end of the first limiting block 71 is smaller than the width of the opening, and the thickness is smaller than the thickness of the first baffle 61, to avoid interference or jamming after the first limiting block 71 is installed.
[0035] like Figure 2 , Figure 5 As shown, the first limiting block 71 is mounted on the end face of the first baffle 61 by countersunk bolts 73. Two spaced mounting holes are provided on the transverse end of the first limiting block 71, and two threaded holes corresponding to the mounting holes are opened on the end face of the first baffle 61. The countersunk bolts 73 pass through the mounting holes on the first limiting block 71 and are inserted into the threaded holes to realize the installation of the first limiting block 71.
[0036] like Figure 2 , Figure 3 , Figure 6 As shown, the second limiting block 72 is installed on the inner side of the second baffle 62. The second limiting block 72 has a T-shaped structure, including a horizontal end and a vertical end. The vertical end is a stop structure that protrudes to the side. The stop structure extends from the inner side of the second baffle 62 into the second mounting hole 64. The lower end face of the stop structure contacts and engages with the inner surface of the second mounting hole 64, and the upper end face contacts and engages with the support block 33 in the second mounting hole 64. The surface of the horizontal end contacts the inner surface of the second baffle 62.
[0037] The second limiting block 72 is installed on the inner side of the second baffle 62 by a hexagonal head bolt 74. Two mounting holes are opened on the transverse end of the second limiting block 72, and bolt holes are opened on the inner side of the second baffle 62. The hexagonal head bolt 74 passes through the mounting holes and is inserted into the bolt holes to realize the installation of the second limiting block 72.
[0038] like Figure 3 , Figure 6As shown, the second limiting block 72 is installed on the inner side of the second baffle 62 by hexagonal bolts. The lower end face of the stop structure on the second limiting block 72 contacts the inner surface of the second mounting hole 64, and the upper end face contacts and engages with the support block 33 in the second mounting hole 64. When the support block 33 applies pressure to the second limiting block 72, the stop structure bears part of the pressure and can transmit the pressure to the second baffle 62, thereby reducing the shear force on the hexagonal head bolt 74 on the second limiting block 72 and improving its service life.
[0039] like Figure 1 , Figure 2 As shown, the end of the cylinder rod 32 is hinged to the telescopic arm 2 via a connecting pin 8. A pin mounting hole is provided at the end of the cylinder rod 32, and a mounting hole aligned with the pin mounting hole is provided on the telescopic arm 2. When the cylinder rod 32 is not extended, the support block 33 on the cylinder barrel 31 engages with the mounting hole on the baffle, aligning the pin mounting hole on the cylinder rod 32 with the mounting hole on the telescopic arm 2. The connecting pin 8 is inserted through the mounting hole on the outside of the telescopic arm 2, passes through the through hole in the cylinder rod 32, and extends out through the mounting hole on the inside of the telescopic arm 2, thus achieving the assembly connection between the cylinder rod 32 and the telescopic arm 2.
[0040] like Figure 7 As shown, the connecting pin 8 provided in this embodiment includes an optical shaft 81 and a retaining plate 82. The retaining plate 82 is welded to one end of the optical shaft 81. A mounting hole 83 is provided on one end of the retaining plate 82, which is used to mate with the fixing hole on the telescopic arm 2. When assembling the connecting pin 8, the end of the optical shaft 81 without the retaining plate 82 is inserted into the mounting hole of the telescopic arm 2 and the pin mounting hole of the cylinder rod 32. Then, the optical shaft 81 is rotated so that the mounting hole 83 on the retaining plate 82 is aligned with the fixing hole on the telescopic arm 2. Then, bolts or pins or other fasteners are installed to fix the position of the retaining plate 82, preventing the connecting pin 8 from rotating and loosening, thus achieving an anti-loosening effect.
[0041] The specific installation steps are as follows: Insert one end of the telescopic cylinder 3 into the process hole 41 of the eccentric seat 4, rotate the telescopic cylinder 3 to make the support block 33 on the cylinder 31 properly positioned so that the cylinder 31 can be installed into the mounting slot 7. After the support block 33 is installed into the mounting hole, install the first limiting block 71 on the end face of the first baffle 61 with countersunk bolts 73, and install the second limiting block 72 on the inner side of the second baffle 62 with hexagonal head bolts 74 to limit the two support blocks 33, thereby realizing the installation of the cylinder 31. After the cylinder 31 is assembled, align the pin mounting hole at the end of the cylinder rod 32 with the mounting hole on the telescopic arm 2, insert the connecting pin 8 into the mounting hole of the telescopic arm 2 and the pin mounting hole of the cylinder rod 32, adjust the connecting pin 8 so that the mounting hole on the clamping plate 82 is aligned with the fixing hole on the telescopic arm 2, install the bolts to fix the position of the clamping plate 82, thereby fixing the position of the connecting pin 8.
[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A folding crane boom telescopic cylinder assembly and connection structure, characterized in that, Includes a telescopic hydraulic cylinder, the cylinder barrel of which is mounted on the basic boom, and the cylinder rod connected to the telescopic boom; The basic arm includes a box-shaped arm body and an eccentric seat. The eccentric seat has a process hole, which is arranged along the length direction of the basic arm. The end of the cylinder barrel furthest from the cylinder rod extends into the process hole, while the end of the cylinder barrel closest to the cylinder rod is mounted on the box-shaped arm.
2. The folding crane boom telescopic cylinder assembly and connection structure according to claim 1, characterized in that, The box-shaped boom is provided with a mounting seat for mounting the cylinder at one end near the telescopic boom. The mounting seat is provided with a mounting slot, which is aligned with the process hole. The cylinder is provided with a support block, and the mounting slot has a mounting hole, which is engaged with the support block. The mounting slot is also provided with a limiting block for limiting the position of the support block.
3. The folding crane boom telescopic cylinder assembly and connection structure according to claim 2, characterized in that, The mounting base is provided with a first baffle and a second baffle, and the first baffle, the second baffle and the mounting base form the U-shaped mounting slot; The mounting holes include a first mounting hole provided on the first baffle and a second mounting hole provided on the second baffle; The support blocks on both sides of the cylinder barrel are respectively fitted with the first mounting hole and the second mounting hole.
4. The folding crane boom telescopic cylinder assembly and connection structure according to claim 3, characterized in that, The limiting block includes a first limiting block mounted on a first baffle and a second limiting block mounted on a second baffle. The first limiting block is mounted on the end face of the first baffle away from the mounting seat by countersunk bolts, and the second limiting block is mounted on the inner side of the second baffle by hexagonal head bolts.
5. The folding crane boom telescopic cylinder assembly and connection structure according to claim 4, characterized in that, The first mounting hole is an open structure extending to the end face of the first baffle, and the second mounting hole is a closed structure.
6. The folding crane boom telescopic cylinder assembly and connection structure according to claim 5, characterized in that, The first limiting block has a T-shaped structure. One end of the first limiting block extends into the first mounting hole from the end face opening of the first mounting hole to limit the support block inside the first mounting hole.
7. The folding crane boom telescopic cylinder assembly and connection structure according to claim 5, characterized in that, The second limiting block is provided with a stop structure that protrudes to the side, and the stop structure extends into the second mounting hole to limit the support block in the second mounting hole.
8. The folding crane boom telescopic cylinder assembly and connection structure according to claim 1, characterized in that, The cylinder rod is hinged to the telescopic arm via a connecting pin. The connecting pin includes a light shaft and a retaining plate. The retaining plate is located at one end of the light shaft and has mounting holes. The mounting holes cooperate with the telescopic arm through fasteners.