A precision belt load expansion mechanism

Abstract

The utility model discloses a kind of precision belt load telescopic mechanisms, including one section arm, two section arms and telescopic drive components, two section arms are telescopic in one section arm sliding;One section arm is fixed with a group of front end main sliding block and a group of tail end main sliding block.Two groups of main sliding block are all arranged around two section arms outer periphery in positive "eight" and inverted "eight" character;Two section arms outer periphery and main sliding block corresponding position are fixed with wear plate track.One section arm front end and tail end two sides are each provided with two groups of side sliding block.The friction surface of main sliding block and side sliding block is all equipped with oil groove, is gathered together by pipeline, realizes concentrated grease lubrication.The utility model controls the form tolerance and roughness of the friction surface of main sliding block and wear plate track, plus concentrated grease lubrication system, ensure that frictional resistance is smaller.And by the distance of front end main sliding block and tail end main sliding block unchanged when two section arms stretch out, main sliding block contact stress is kept stable, ensure transmission accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a precision load-bearing telescopic mechanism. Background Technology

[0002] Existing telescopic robotic arms typically mount sliders on unmachined surfaces, with sliders located at the rear end of the second-section arm and the front end of the first-section arm. The cylinder wall that rubs against the sliders is also unmachined. During the extension of the second-section arm, the slider at the rear end gradually approaches the slider at the front end of the first-section arm. This causes the support distance of the second-section arm to shorten as it extends. This design suffers from problems such as excessive telescopic resistance, changes in slider contact stress, and variations in overall deformation, potentially affecting the load-bearing capacity and reducing the accuracy of telescopic extension. Utility Model Content

[0003] This utility model provides a precision load-bearing telescopic mechanism to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A precision load-bearing telescopic mechanism includes: a first arm, a second arm, and a telescopic drive component. The first arm is sleeved outside the second arm, and the telescopic drive component drives the second arm to slide and telescopically extend and retract inside the first arm. A set of main sliders is fixedly installed at the front and rear ends inside the first arm, and the two sets of main sliders are arranged around the outer periphery of the second arm. Wear-resistant plate tracks are fixedly installed on the outer periphery of the second arm at positions corresponding to the main sliders. The main sliders, the mounting surfaces of the main sliders, and the friction surfaces of the wear-resistant plate tracks are all precision machined. The friction surfaces of the main sliders are provided with lubricating oil grooves, which are filled with grease.

[0005] Preferably, multiple wear-resistant plate tracks are fixed on the outer periphery of the two-section arm. The wear-resistant plate tracks are arranged parallel to the central axis of the two-section arm, and the main slider abuts against the friction surface of the wear-resistant plate tracks.

[0006] Preferably, the cross-section of the two-section arm is octagonal, and there are four main sliders in each of the two sets. The four wear-resistant plate tracks are fixed on four mutually spaced planes among the eight planes of the two-section arm. The four front-end main sliders abut against the four wear-resistant plate tracks respectively, and the four tail-end main sliders abut against the four wear-resistant plate tracks respectively.

[0007] Preferably, a lubricating oil groove is provided on the side of the main slider facing the wear-resistant plate track, and an oil cup mounting hole communicating with the lubricating oil groove is also provided on the main slider, and an oil cup for supplying grease to the lubricating oil groove is installed in the oil cup mounting hole.

[0008] Preferably, the main slider at the front end is provided with a positioning boss on the side away from the second arm, and the main slider pressure plate is fixed at the front end of the first arm, and the main slider pressure plate presses the positioning boss onto the positioning step of the first arm.

[0009] Preferably, one arm is provided with two sets of side sliders, each set of side sliders corresponds to the plane of the non-wear-resistant plate track in the eight planes of the two arm, and the planes corresponding to the two sets of side sliders are arranged opposite to each other; each set of side sliders includes multiple side sliders, which are arranged in a matrix and abut against the front and rear sides of the two arm.

[0010] Preferably, one arm section is provided with a threaded sleeve, and the side slider is provided with an external thread. The side slider is screwed into the threaded sleeve and passes into the one arm section.

[0011] Preferably, the telescopic drive component includes a telescopic cylinder and a displacement sensor. The telescopic cylinder is located inside the first and second arm sections. One end of the telescopic cylinder is hinged to the tail end of the first arm section, and the other end is hinged to the front end of the second arm section. Part of the displacement sensor is located on the cylinder body of the telescopic cylinder, and the other part is located on the cylinder rod of the telescopic cylinder. The displacement sensor is used to detect the telescopic amount of extension and retraction of the telescopic cylinder.

[0012] Preferably, a first arm includes a tail section and a head section. The tail section is provided with a tail flange, and the head section is provided with a head flange. The tail section and the head section are connected by the tail flange and the head flange. The tail end of the second arm is inserted into the tail section of the first arm, and the main slider of the tail end is located at the end of the head section facing the tail section.

[0013] Preferably, the inner side of the front end of the two-section arm is provided with a two-section arm hinge seat, the tail end of the first section arm is provided with a tail connecting ear, and the cylinder body of the telescopic drive component is hinged to the tail connecting ear, and the cylinder rod is hinged to the two-section arm hinge seat.

[0014] Beneficial effects: This utility model discloses a precision load-bearing telescopic mechanism. By controlling the form and position tolerances and roughness of the friction surfaces of the main slider and the wear-resistant plate track, and using a centralized grease lubrication system, it ensures low frictional resistance. A set of main sliders is fixed at both the front and rear ends inside the first arm section. These main sliders abut against the outer periphery of the second arm section, ensuring that the distance between the front and rear main sliders remains constant when the second arm section extends outward. This maintains the consistent support length of the first arm for the second arm section, stabilizes the contact stress of the main sliders, and guarantees load-bearing capacity and telescopic transmission accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a precision load-bearing telescopic mechanism disclosed in this utility model; Figure 2 This is a half-sectional view of a precision load-bearing telescopic mechanism disclosed in this utility model; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 Sectional view of BB; Figure 5 This is a structural schematic diagram of one arm of a precision load-bearing telescopic mechanism disclosed in this utility model from a first-view perspective. Figure 6 This is a structural schematic diagram of one arm of a precision load-bearing telescopic mechanism disclosed in this utility model from a second perspective. Figure 7 This is a side view of a precision load-bearing telescopic mechanism disclosed in this utility model, comprising a section arm head, main slider, side slider, front slider mounting plate, rear slider mounting plate, and main slider pressure plate assembly. Figure 8 This is a front view of a precision load-bearing telescopic mechanism disclosed in this utility model, comprising a section arm head, main slider, side slider, front slider mounting plate, rear slider mounting plate, and main slider pressure plate assembly. Figure 9 for Figure 8 Sectional view of CC; Figure 10 for Figure 9 A magnified view of a section of section I; Figure 11 for Figure 9 Enlarged view of a section of section II; Figure 12 This is a schematic diagram of the main slider of a precision load-bearing telescopic mechanism disclosed in this utility model from a first-view perspective; Figure 13 This is a schematic diagram of the main slider of a precision load-bearing telescopic mechanism disclosed in this utility model from a second perspective.

[0017] In the diagram: 1. First-section arm; 11. Main slider; 111. Lubricating oil groove; 112. Oil cup; 113. Positioning boss; 13. Side slider; 131. Locking nut; 14. Threaded sleeve; 151. Telescopic cylinder; 152. Displacement sensor; 161. Tail end of first-section arm; 1611. Tail flange; 1612. Tail connecting lug; 162. Head of first-section arm; 1621. Head flange; 1622. Front slider mounting plate; 1623. Rear slider mounting plate; 17. Main slider pressure plate; 2. Second-section arm; 24. Wear-resistant plate track; 25. Second-section arm hinge seat. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Combination Figures 1-13 As shown, Figure 9 The curved arrows indicate the cross-sectional view after being rotated in that direction for easier reading. A precision load-bearing telescopic mechanism includes: a first arm 1, a second arm 2, and a telescopic drive component. The first arm 1 is sleeved outside the second arm 2, and the telescopic drive component drives the second arm 2 to slide and extend within the first arm 1. A set of main sliders 11 is fixed at both the front and rear ends inside the first arm 1, and the two sets of main sliders 11 are arranged around the outer periphery of the second arm 2. Wear-resistant plate tracks 24 are fixed at positions corresponding to the main sliders 11 on the outer periphery of the second arm 2. The main sliders 11, their mounting surfaces, and the friction surfaces of the wear-resistant plate tracks 24 are all precision machined. The friction surfaces of the main sliders 11 are provided with lubricating oil grooves 111, which are filled with grease. The front and rear main sliders 11 are sandwiched in the gap between the cylinder walls of the first arm 1 and the second arm 2, forming a sliding friction pair. This application controls the form and position tolerances and surface roughness by precision machining the main slider 11, its mounting surface, and the friction surface of the wear-resistant plate track 24, and by using concentrated grease lubrication to ensure low frictional resistance. Furthermore, by fixing a set of front-end main sliders 11 and a set of rear-end main sliders 11 inside the first arm section 1, and by having the front-end main sliders 11 abut against the outer periphery of the second arm section 2 and the rear-end main sliders 11 abut against the outer periphery of the second arm section 2, the distance between the front-end and rear-end main sliders 11 remains constant when the second arm section 2 extends outward, thus ensuring that the support length of the first arm section 1 on the second arm section 2 remains constant. Figure 2 As shown, Figure 2 The original position before extension is indicated by a dashed line. The distance Δ3 between the front and rear main sliders 11 remains unchanged, meaning the effective length Δ3 of the two-section arm 2 including the one-section arm 1 remains unchanged. This ensures that the stroke S2 ​​= S1 at the front and rear ends of the two-section arm 2, thus designing the telescopic structure as a fixed-content telescopic motion. Consequently, the support reaction force and contact stress of the front and rear main sliders 11 are almost constant. Therefore, the contact stress of the sliders can be stabilized, ensuring load-bearing capacity and telescopic transmission accuracy.

[0020] Preferably, multiple wear-resistant plate tracks 24 are fixedly provided on the outer periphery of the two-section arm 2. The wear-resistant plate tracks 24 are arranged parallel to the central axis of the two-section arm 2, and the main slider 11 abuts against the friction surface of the wear-resistant plate tracks 24. The front and rear main sliders 11 abut against the wear-resistant plate tracks 24 to ensure sliding connection and support and guide the two-section arm 2, allowing the two-section arm 2 to slide and extend relative to the one-section arm 1. The front and rear main sliders 11 are distributed at the front and rear positions of the wear-resistant plate tracks 24, restricting the two main force positions when the one-section arm 1 extends and retracts. The front and rear main sliders 11 and the wear-resistant plate tracks 24 are machined to ensure precise dimensions, flatness, and surface roughness. At the same time, the front and rear main sliders 11 are made of polytetrafluoroethylene (PTFE), which results in a low coefficient of sliding friction and high dimensional accuracy between the two-section arm 2 and the one-section arm 1, achieving smooth sliding and excellent load-bearing capacity.

[0021] Preferably, the cross-section of the two-section arm 2 is octagonal, and there are four main sliders 11 in each of the two sets. The four wear-resistant plate tracks 24 are fixed on four mutually spaced planes among the eight planes of the two-section arm 2. The four front-end main sliders 11 abut against the four wear-resistant plate tracks 24 respectively, and the four tail-end main sliders 11 abut against the four wear-resistant plate tracks 24 respectively. That is, the two sets of main sliders 11 are arranged in the shape of a regular "eight" and an inverted "eight" around the outer periphery of the two-section arm 2.

[0022] Specifically, both section 1 and section 2 have octagonal cross-sections with narrower planes at their four corners. The wear-resistant track 24 is made of long strips of wear-resistant steel plate, and four wear-resistant tracks 24 are fixed on the planes at the four corners. The main slider 11 at the front and rear ends abuts against the wear-resistant track 24 at an angle, automatically centering after bearing load, which can better limit lateral and vertical sway. At the same time, it can also work with three types of sliders to limit the relative rotation between section 1 and section 2.

[0023] Preferably, the main slider 11 has a lubricating oil groove 111 on the side facing the wear-resistant plate track 24, and the main slider 11 also has an oil cup mounting hole communicating with the lubricating oil groove 111. An oil cup 112 for supplying grease to the lubricating oil groove 111 is installed in the oil cup mounting hole; or, further, the oil cups 112 are gathered together by pipelines for centralized lubrication, that is, copper pipes are connected to the tail end of the oil cups 112, and the copper pipes are connected to a lubricating oil distributor after wiring. The lubricating oil distributor quantitatively and evenly distributes the grease delivered by the pump to each oil cup 112. By introducing grease into the oil cup mounting hole, the grease enters the lubricating oil groove 111, thereby allowing the grease to enter between the main slider 11 and the wear-resistant plate track 24 for lubrication.

[0024] Preferably, the front main slider 11 is provided with a positioning boss 113 on the side away from the second arm 2, and the front end of the first arm 1 is fixed with a main slider pressure plate 17. The main slider pressure plate 17 presses the positioning boss 113 on the positioning step of the first arm 1, thereby realizing the position limitation of the front main slider 11 in the extension direction.

[0025] Preferably, the first arm 1 includes a tail section 161 and a head section 162. The tail section 161 is provided with a tail flange 1611, and the head section 162 is provided with a head flange 1621. The tail section 161 and the head section 162 are connected by the tail flange 1611 and the head flange 1621. The tail end of the second arm 2 is inserted into the tail section 161, and the main slider 11 at the tail end is located at the end of the head section 162 facing the tail section 161. The space in the tail section 161 allows the length of the first arm 1 to increase, and the tail end of the second arm 2 can be inserted into the tail section 161, so that the second arm 2 can be retracted into the first arm 1. At the same time, it ensures that when the second arm 2 is extended, the main slider 11 at the front end and the main slider 11 at the tail end always abut against the wear-resistant plate track 24. The tail section 161 and head section 162 of the first arm are machined independently. The main slider 11 at the front and tail ends are both located at the opening of the head section 162 (i.e., the main slider 11 at the front end is located at the front port of the head section 162 facing the second arm 2, and the main slider 11 at the tail end is located at the rear port of the head section 162 away from the second arm 2). These are easily accessible to machining tools, ensuring precise installation. The machining features of the second arm 2 are all on its outer surface, facilitating easy fixing and machining. The machining difficulty of the first arm 1 and the second arm 2 is reduced, making it easier to guarantee accuracy.

[0026] Specifically, the head section 162 of the boom includes: an octagonal cylinder, a front reinforcing rib at the front end of the cylinder, and a rear reinforcing rib at the rear end of the cylinder, which strengthen the two main stress points at the front and rear. Rectangular openings are provided at the four corners of the front end of the cylinder, with the front reinforcing ribs avoiding these rectangular openings. A front slider mounting plate 1622 is welded and fixed to the rectangular openings. A U-shaped mounting groove is provided on the lower surface of the front slider mounting plate 1622, into which the front main slider 11 is inserted. A positioning boss 113 abuts against the side of the front slider mounting plate 1622. The front main slider 11 is fixed to the front slider mounting plate 1622 by screws, and the front slider mounting plate 1622 has clearance holes to expose the oil cup 112. A main slider pressure plate 17 is fixed on the front reinforcing rib at the front end of the cylinder by bolts and pads. The main slider pressure plate 17 presses the outer side of the positioning boss 113 so that the inner side of the positioning boss 113 is pressed against the side of the front slider mounting plate 1622.

[0027] Rectangular openings are provided at the four corners of the rear end of the boom head 162, with the rear reinforcing ribs avoiding these openings. A rear slider mounting plate 1623 is welded and fixed to each rectangular opening. A U-shaped mounting groove is provided on the lower surface of the rear slider mounting plate 1623. The main slider 11 at the tail end is inserted into the U-shaped mounting groove. A positioning boss is also provided on the main slider 11 at the tail end, with its inner side abutting against the side of the rear slider mounting plate 1623. The main slider 11 at the tail end is fixed to the rear slider mounting plate 1623 by screws. A lubricating oil groove 111 is also machined on the surface of the main slider 11 at the tail end, and an oil cup 112 is provided. The rear slider mounting plate 1623 has clearance holes to expose the oil cup 112. The tail section 161 and the head section 162 of the boom are connected by bolts, tail flange 1611 and head flange 1621. The tail flange 1611 presses against the outer side of the boss of the main slider 11 at the tail end, thereby pressing and fixing the main slider 11 at the tail end.

[0028] Preferably, the first arm 1 is provided with two sets of side sliders, each set of side sliders corresponding to the plane of the non-installed wear-resistant plate track 24 among the eight planes of the second arm 2, and the planes corresponding to the two sets of side sliders are arranged opposite each other; in this embodiment, two horizontally opposite vertical planes corresponding to the second arm 2 are selected. Each set of side sliders includes multiple side sliders 13, which are arranged in a matrix and abut against the front and rear sides of the second arm 2, and the second arm 2 is supported by the two sets of side sliders. In this embodiment, each set of side sliders includes four side sliders 13, two of which correspond to the front end of the cylinder and two of which correspond to the rear end of the cylinder.

[0029] Preferably, one arm section 1 is provided with a threaded sleeve 14, and the side slider 13 is provided with external threads. The side slider 13 is screwed into the threaded sleeve 14 and passes into the one arm section 1. The threads facilitate the disassembly and assembly of the side slider 13, and the side slider 13 is also provided with a lubricating oil groove 111 and an oil cup 112 for lubrication.

[0030] Specifically, the four front-end main sliders 11, the four tail-end main sliders 11, and the eight side sliders 13 are connected together via independent copper pipes. Regular lubrication is achieved by manually adding oil to each slider via oil cups 112 or by automatic oiling via a distributor, which helps reduce frictional resistance and extend slider life.

[0031] Specifically, the side slider 13 includes a threaded section that mates with the internal thread of the threaded sleeve 14 and a hexagonal tightening part. A locking nut 131 is also provided outside the threaded section. By tightening the locking nut 131, the position of the side slider 13 can be locked to prevent loosening. At the same time, the length of the side slider 13 inserted into the arm section 1 can be easily adjusted, thereby adjusting the clamping force.

[0032] Preferably, the telescopic drive component includes a telescopic cylinder 151 and a displacement sensor 152. The telescopic cylinder 151 is located inside the first arm 1 and the second arm 2. One end of the telescopic cylinder 151 is hinged to the tail end of the first arm 1, and the other end is hinged to the front end of the second arm 2. Part of the displacement sensor 152 is located on the cylinder body of the telescopic cylinder 151, and another part is located on the cylinder rod of the telescopic cylinder 151. The displacement sensor 152 is used to detect the telescopic amount of the telescopic cylinder 151. By controlling the telescopic amount of the telescopic cylinder 151, the length of the second arm 2 extending out and retracting into the first arm 1 is controlled, thereby achieving precise control of the telescopic movement of the second arm 2.

[0033] Preferably, the inner side of the front end of the second-section arm 2 is provided with a second-section arm hinge seat 25, and the tail end 161 of the first-section arm is provided with a tail end connecting ear 1612. The cylinder body of the telescopic cylinder 151 is hinged to the tail end connecting ear 1612 through a rotating shaft and a spherical bearing, and the cylinder rod is hinged to the second-section arm hinge seat 25 through a rotating shaft and a spherical bearing. This allows the telescopic cylinder 151 to swing within a small range inside the first-section arm 1 and the second-section arm 2, thereby adapting to machining errors and dimensional changes after the wear of the three types of sliders. This ensures that the telescopic cylinder 151 can extend and retract freely without being constricted; it is convenient for installation and can also extend the service life of the telescopic cylinder 151.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A precision load-bearing telescopic mechanism, characterized in that, include: The arm consists of a first arm (1), a second arm (2), and a telescopic drive component. The first arm (1) is fitted over the second arm (2). The telescopic drive component drives the second arm (2) to slide and extend inside the first arm (1). A set of main sliders (11) is fixed at the front and rear ends of the first arm (1). The two sets of main sliders (11) are arranged around the outer periphery of the second arm (2). Wear-resistant plate rails (24) are fixed at the corresponding positions of the main sliders (11) on the outer periphery of the second arm (2). The mounting surfaces of the main sliders (11) and the friction surfaces of the wear-resistant plate rails (24) are precision machined. The friction surfaces of the main sliders (11) are provided with lubricating oil grooves (111), which are filled with grease.

2. The precision load-bearing telescopic mechanism according to claim 1, characterized in that, Multiple wear-resistant plate tracks (24) are fixed on the outer periphery of the two-section arm (2). The wear-resistant plate tracks (24) are arranged parallel to the central axis of the two-section arm (2). The main slider (11) abuts against the friction surface of the wear-resistant plate tracks (24).

3. The precision load-bearing telescopic mechanism according to claim 2, characterized in that, The cross-section of the two-section arm (2) is octagonal. There are four main sliders (11) in each of the two sets. The four wear-resistant plate tracks (24) are fixed on four mutually spaced planes in the eight planes of the two-section arm (2). The four main sliders (11) at the front end abut against the four wear-resistant plate tracks (24) respectively. The four main sliders (11) at the tail end abut against the four wear-resistant plate tracks (24) respectively.

4. The precision load-bearing telescopic mechanism according to claim 3, characterized in that, The main slider (11) has a lubricating oil groove (111) on the side facing the wear-resistant plate track (24). The main slider (11) also has an oil cup mounting hole that connects to the lubricating oil groove (111). An oil cup (112) for supplying grease to the lubricating oil groove (111) is installed in the oil cup mounting hole.

5. A precision load-bearing telescopic mechanism according to claim 4, characterized in that, The main slider (11) at the front end is provided with a positioning boss (113) on the side away from the second arm (2). The main slider pressure plate (17) is fixed at the front end of the first arm (1). The main slider pressure plate (17) presses the positioning boss (113) onto the positioning step of the first arm (1).

6. A precision load-bearing telescopic mechanism according to claim 5, characterized in that, The first arm (1) is provided with two sets of side sliders. Each set of side sliders corresponds to the plane of the non-installed wear-resistant plate track (24) in the eight planes of the second arm (2), and the planes corresponding to the two sets of side sliders are arranged opposite to each other. Each set of side sliders includes multiple side sliders (13), and the multiple side sliders (13) are arranged in a matrix and abut against the front and rear sides of the second arm (2).

7. A precision load-bearing telescopic mechanism according to claim 6, characterized in that, The first arm (1) is provided with a threaded sleeve (14), and the side slider (13) is provided with an external thread. The side slider (13) is screwed into the threaded sleeve (14) and passes into the first arm (1).

8. A precision load-bearing telescopic mechanism according to claim 7, characterized in that, The telescopic drive component includes a telescopic cylinder (151) and a displacement sensor (152). The telescopic cylinder (151) is located inside the first arm (1) and the second arm (2). One end of the telescopic cylinder (151) is hinged to the tail end of the first arm (1), and the other end is hinged to the front end of the second arm (2). Part of the displacement sensor (152) is located on the cylinder body of the telescopic cylinder (151), and the other part is located on the cylinder rod of the telescopic cylinder (151). The displacement sensor (152) is used to detect the telescopic amount of the telescopic cylinder (151).

9. A precision load-bearing telescopic mechanism according to any one of claims 1-8, characterized in that, The first arm (1) includes a tail section (161) and a head section (162). The tail section (161) is provided with a tail flange (1611), and the head section (162) is provided with a head flange (1621). The tail section (161) and the head section (162) are connected by the tail flange (1611) and the head flange (1621). The tail end of the second arm (2) is inserted into the tail section (161), and the main slider (11) at the tail end is located at the end of the head section (162) facing the tail section (161).

10. A precision load-bearing telescopic mechanism according to claim 9, characterized in that, The front end of the two-section arm (2) is provided with a two-section arm hinge seat (25), and the tail end (161) of the one-section arm (1) is provided with a tail end connecting ear (1612). The telescopic drive component's telescopic cylinder (151) is hinged to the tail end connecting ear (1612), and the cylinder rod is hinged to the two-section arm hinge seat (25).

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