A telescopic mechanism for picking up items in a narrow space and its usage method

Abstract

The present invention relates to the technical field of telescopic mechanisms for taking out items, and in particular to a telescopic mechanism for taking out items in a narrow space and a method for using the same. The technical solution includes two steel wires and a thin rod body fixed to the steel wires, the thin rod body being provided with a mounting hole, an inflating device being fixed to the bottom inner wall of the mounting hole; the inflating device being connected to a transverse tube, a piston block being slidably mounted in the transverse tube, a force storage spring extending out of the transverse tube being connected to one side of the piston block, a rubber plate being hinged to the bottom inner wall of the mounting hole, one end of the force storage spring being against the rubber plate; friction devices for generating friction with the inner wall of the mounting hole are arranged on both sides of the rubber plate. The present invention enables objects to be taken out in a narrow space, objects of different shapes to be taken out, has good compatibility, is easy to operate, and is suitable for popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopic mechanisms for taking out items, and in particular to a telescopic mechanism for taking out items in a narrow space and a use method thereof. Background Art

[0002] With the rapid development of modern mechanical equipment, the technology of more and more large-scale mechanical equipment is becoming more and more mature. There are certain problems with the parts that cooperate with each other in the mechanical equipment. Whenever some parts of these mechanical equipment have problems during the operation of the equipment, resulting in the equipment cannot proceed smoothly, key parts need to be replaced. At this time, it is not easy to perform manual operation in a small space, especially when these key components are in the pipeline and the pipelines are relatively small. At this time, specific mechanical mechanism tools are needed to take them out. Therefore, the present application proposes a telescopic mechanism for taking out parts in a narrow space and a method of using the same. Summary of the invention

[0003] The purpose of the present invention is to address the problem in the background technology that existing mechanical parts tools are difficult to meet the needs of taking out and replacing parts from tiny pipes, and to propose a telescopic mechanism for taking out parts in a narrow space and a method for using the same.

[0004] On the one hand, the present invention provides a narrow space retractable mechanism, comprising two steel wires and a thin rod body fixed to the steel wires, the thin rod body is provided with a mounting hole, and an inflatable device is fixed to the bottom inner wall of the mounting hole;

[0005] The inflatable device is connected to a transverse tube, a piston block is slidably installed in the transverse tube, one side of the piston block is connected to a force storage spring extending out of the transverse tube, a rubber plate is hinged to the bottom inner wall of the mounting hole, and one end of the force storage spring abuts against the rubber plate;

[0006] Both sides of the rubber plate are provided with friction devices for generating friction with the inner wall of the mounting hole.

[0007] Optionally, the inflation device includes a box body fixedly mounted on the inner wall of the bottom of the mounting hole, a cross tube fixed to the top side of the box body, a piston column slidably mounted in the box body, a pressing rod fixed to the bottom of the piston column, the bottom of the pressing rod slides through the bottom of the box body and the bottom of the thin rod body, a cross plate located below the thin rod body is fixed on the pressing rod, a return spring is fixed between the cross plate and the bottom of the thin rod body, an air intake pipe is fixed to the top of the box body, a one-way valve 1 is installed on the air intake pipe, and a one-way valve 2 is installed in one end of the cross tube close to the box body.

[0008] Optionally, the friction device includes compression springs fixedly installed on both sides of the rubber plate. One end of each compression spring is fixed with a friction pad, which abuts against the inner wall of the mounting hole. On both sides of the inner wall of the mounting hole, there are protrusions located on one side of the friction pad.

[0009] Optionally, the cross-section of the protrusion is arranged in an isosceles trapezoid structure.

[0010] Optionally, it further includes a lifting assembly. The lifting assembly includes an annular disc and a special disc located below the annular disc. The annular disc is fixedly penetrated by a support rod. At the top of the support rod, there is a handle. The support rod is threadedly connected to the special disc. At the top of the annular disc, there are two fixed columns. On the special disc, there are two circular holes. The top ends of the two steel wire ropes respectively penetrate through the two circular holes and are fixedly connected to the fixed columns.

[0011] Optionally, the inner diameter of the circular hole is larger than the cross-sectional diameter of the steel wire rope.

[0012] Optionally, the rubber plate is provided with anti-slip patterns.

[0013] Optionally, at the end of the cross-tube away from the box body, there is a stop block fixed to the inner wall.

[0014] Optionally, at the top of the thin rod body, there is a thin column body. Above the thin column body, there is a lifting rod. At the top of the thin column body, there is a slider, which is slidably installed at the bottom of the lifting rod.

[0015] On the other hand, the present invention provides a method for using a picking telescopic mechanism in a narrow space, which is applied to the picking telescopic mechanism in a narrow space described above, and includes the following steps:

[0016] Step 1. Insert the steel wire rope into the narrow space. At the same time, the two thin rod bodies descend to both sides of the object. Inflate the inside of the cross-tube through the inflation device to drive the piston block to move and compress the energy storage spring. The energy storage spring exerts a thrust on the rubber plate.

[0017] Step 2. The compression springs are in a compressed state. Friction is generated between the friction pads and the inner wall of the mounting holes. With the cooperation of the protrusions to prevent the friction pads from sliding easily in the mounting holes, through the connection of the compression springs, the rubber plate is limited, and the energy storage spring is compressed.

[0018] Step 3. With the continuous inflation of the cross-tube, the thrust exerted by the energy storage spring on the rubber plate, driven by the compression springs, causes the friction pads to move and break through the resistance of the friction device to the friction pads. The two rubber plates instantaneously clamp on both sides of the object.

[0019] Step 4. Lift the steel wire rope to drive the thin rod bodies to rise, and the object clamped by the two rubber plates can be taken out in the narrow space.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] By inflating the horizontal pipe, the piston block is pushed to move the energy storage spring, which in turn pushes the rubber plate to generate a movement tendency. With the setting of the friction device, the two rubber plates are instantly and firmly clamped on both sides of the object, realizing the clamping of both sides of the object and can be used for clamping objects of different shapes;

[0022] By manually rotating the handle to drive the annular disc up and down, the fixed strut rises, pulling the steel wire rope up. The lifting steel wire rope drives the thin rod body to rise, and the object clamped by the two rubber plates can be taken out in a narrow space, realizing the ability to take out objects in a narrow space, with good convenience and good compatibility for taking out objects of different shapes.

[0023] The present invention realizes the ability to take out objects in a narrow space, has good compatibility for taking out objects of different shapes, is easy to operate, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of a telescopic mechanism for taking objects in a narrow space according to the present invention is given;

[0025] Figure 2 It is a structural schematic diagram of the thin rod body;

[0026] Figure 3 It is a partial structural schematic diagram inside the mounting hole Figure 1 ;

[0027] Figure 4 It is Figure 3 a partial enlarged structural schematic diagram at A in

[0028] Figure 5 It is a partial structural schematic diagram inside the mounting hole Figure 2 ;

[0029] Figure 6 It is a structural schematic diagram of the connection between the box body and the horizontal pipe;

[0030] Figure 7 It is a schematic diagram of the internal structure of the body and the horizontal pipe;

[0031] Figure 8 It is a cross-sectional structural schematic diagram of the protrusion;

[0032] Figure 9 It is a structural schematic diagram of a telescopic mechanism for taking objects in a narrow space given in Embodiment 2.

[0033] Reference numerals: 1, steel wire rope; 2, thin rod body; 3, mounting hole; 4, rubber plate; 5, compression spring; 6, friction pad; 7, protrusion; 8, box body; 9, pressing rod; 10, cross plate; 11, return spring; 12, piston column; 13, intake pipe; 14, check valve one; 15, cross pipe; 16, check valve two; 17, piston block; 18, energy storage spring; 19, stop block; 20, annular disc; 21, special disc; 22, round hole; 23, support rod; 24, handle; 25, thin column body; 26, lifting rod; 27, slider; 28, fixed support column. Detailed implementation mode

[0034] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Embodiment

[0035] As Figures 1-8 shown, a retractable mechanism for picking up objects in a narrow space proposed by the present invention includes two steel wire ropes 1 and a thin rod body 2 fixed to the steel wire rope 1. The cross-sectional diameter of the thin rod body 2 is the same as the cross-sectional diameter of the steel wire rope 1. The thin rod body 2 can be inserted into a narrow gap. An installation hole 3 is provided on the thin rod body 2. An air inflation device is fixed to the inner wall of the bottom of the installation hole 3. The air inflation device is connected to a cross pipe 15. The air inflation device includes a box body 8 fixedly installed on the inner wall of the bottom of the installation hole 3. The cross pipe 15 is fixed to one side of the top of the box body 8. A piston column 12 is slidably installed in the box body 8. A pressing rod 9 is fixed to the bottom of the piston column 12. The bottom of the pressing rod 9 slidably penetrates the bottom of the box body 8 and the bottom of the thin rod body 2. Through holes with an inner diameter larger than the cross-sectional diameter of the pressing rod 9 are provided at the bottom of the box body 8 and the bottom of the thin rod body 2. A cross plate 10 located below the thin rod body 2 is fixed to the pressing rod 9. A return spring 11 is fixed between the cross plate 10 and the bottom of the thin rod body 2. An intake pipe 13 is fixed to the top of the box body 8. A check valve one 14 is installed on the intake pipe 13. The check valve one 14 restricts the air flow to only enter the intake pipe 13 from the outside. A check valve two 16 is installed in the cross pipe 15 near the box body 8. The check valve two 16 restricts the air flow to only enter the cross pipe 15 from the box body 8. Manually push the steel wire rope 1 downward to drive the thin rod body 2 to continue to descend, so that the pressing rod 9 receives a reaction force from the bottom of the narrow space, driving the pressing rod 9 into the box body 8, pushing the gas above the piston column 12 to enter the cross pipe 15 through the check valve two 16, and then release the steel wire rope 1. Under the action of the restoring force of the return spring 11, drive the cross plate 10 to descend, causing the piston column 12 to descend, so that the outside air enters the box body 8 through the check valve one 14 and the intake pipe 13 to supplement the gas, causing the return spring 11 to be compressed. Inflate the inside of the cross pipe 15 through the air inflation device. Press and lift the steel wire rope 1 up and down in this way to realize the up and down movement of the thin rod body 2, and the inflation of the cross pipe 15 can be realized.

[0036] As Figures 2-7As shown, a piston block 17 is slidably installed in the transverse tube 15, and one side of the piston block 17 is connected to a force storage spring 18 extending from the transverse tube 15. A rubber plate 4 is hinged on the bottom inner wall of the mounting hole 3, and the rubber plate 4 is provided with anti-skid patterns to play a good anti-skid role. One end of the force storage spring 18 rests on the rubber plate 4; the transverse tube 15 is inflated, so that the piston block 17 pushes the force storage spring 18 to move and push the rubber plate 4 to generate a movement trend. If the rubber plate 4 moves and moves out of the mounting hole 3, it can contact the object and is used to clamp the object.

[0037] A stopper 19 is fixed to the inner wall of one end of the transverse tube 15 away from the box body 8 , and the stopper 19 is used to prevent the piston block 17 from moving out of the transverse tube 15 .

[0038] It is worth noting that, in the present embodiment, friction devices for generating friction with the inner wall of the mounting hole 3 are arranged on both sides of the rubber plate 4, and the friction devices include compression springs 5 ​​fixedly mounted on both sides of the rubber plate 4, and a friction pad 6 is fixed at one end of the compression spring 5, and the friction pad 6 is against the inner wall of the mounting hole 3, and protrusions 7 located on one side of the friction pad 6 are fixed on the inner walls of both sides of the mounting hole 3, and the cross-section of the protrusion 7 is an isosceles trapezoidal structure, and beveled edges are arranged on both sides of the cross-section of the protrusion, and the beveled edges facilitate the friction pad 6 to slide over. The up and down movement of the thin rod body 2 can realize continuous inflation in the cross tube 15, so that the piston block 17 pushes the storage spring 18 to move and push the rubber plate 4 to generate a movement trend. Since the rubber plate 4 is connected to the friction pad 6 through the compression spring 5, and the friction pad 6 is blocked by the protrusion 7, the friction pad 6 is made of rubber and can be deformed. When the thrust received by the friction pad 6 is large enough, the contact position between the friction pad 6 and the protrusion 7 will be deformed, and the compression spring 5 will be further squeezed, so that the friction pad 6 slides over the protrusion 7. The function of the protrusion 7 is to increase the friction resistance. At the same time, the compression spring 5 is in a compressed state to apply pressure to the friction pad 6, and friction is generated between the friction pad 6 and the inner wall of the mounting hole 3. The protrusion 7 blocks the friction pad 6 so that the friction pad 6 cannot slide easily in the mounting hole 3. With the continuous inflation in the cross tube 15, the thrust applied by the force storage spring 18 to the rubber plate 4 becomes greater and greater. The thrust transmitted to the friction pad 6 breaks through the friction resistance of the friction pad 6 and the friction resistance given by the protrusion 7. The friction pad 6 and the rubber plate 4 are moved out of the mounting hole 3. The rubber plate 4 is instantly tilted and ejected and rests on the object to the maximum extent. One end of the force storage spring 18 rests on the rubber plate 4, so that the two rubber plates 4 are instantly and firmly clamped on both sides of the object. The other side of the thin rod body 2 rests on the inner wall of the narrow space. Through the cooperation of the two thin rod bodies 2, the two sides of the object are clamped.

[0039] The function of the friction device is to prevent the rubber plate 4 from immediately tilting out of the mounting hole 3 after being pushed by the energy storage spring 18. Without the friction device, when the rubber plate 4 is pushed, it will immediately tilt and contact the object. At this time, the clamping force on the object is still very small, and continuous inflation is required to increase the thrust of the energy storage spring on the rubber plate 4. However, since the rubber plate 4 generates friction on the object at this time, the fine rod body 2 is hindered when moving up and down, and at the same time, the steel wire rope 1 will bend, resulting in the inability to apply pressure to the fine rod body 2, so there is no need for continuous inflation. Therefore, a friction device is set up to achieve the energy storage of the energy storage spring 18, so that the rubber plate 4 is ejected with a relatively large force instantaneously when clamping the object, realizing the instantaneous and stable clamping of the object. After clamping, there is no need to lift and press the steel wire rope 1 up and down, and there will be no problem of the steel wire rope 1 bending during the pressing and inflation process, ensuring stable and continuous inflation.

[0040] In this embodiment, a lifting assembly is further included. The lifting assembly includes an annular disc 20 and a special disc 21 located below the annular disc 20. A support rod 23 is fixedly penetrated through the annular disc 20. A handle 24 is fixed to the top of the support rod 23. The support rod 23 is threadedly connected to the special disc 21. The curved surface of the support rod 23 is provided with an external thread, and a cylindrical hole is opened on the special disc 21. An internal thread adapted to the external thread is provided in the cylindrical hole. Two fixed struts 28 are fixed to the top of the annular disc 20. Two circular holes 22 are opened on the special disc 21. The inner diameter of the circular holes 22 is larger than the cross-sectional diameter of the steel wire rope 1. The top ends of the two steel wire ropes 1 respectively penetrate through the two circular holes 22 and are fixedly connected to the fixed struts 28. Press the special disc 21 against the top of the narrow space, manually rotate the handle 24 to drive the support rod 23 to rotate, drive the annular disc 20 to rotate. During the rotation of the support rod 23, it moves upward, driving the annular disc 20 to rise, causing the fixed struts 28 to rise and pulling the steel wire rope 1 to rise. The lifting steel wire rope 1 drives the fine rod body 2 to rise, and the object clamped by the two rubber plates 4 can be taken out in the narrow space, and at the same time, the object is also prevented from being worn by the up and down friction.

[0041] In this embodiment, the handle 24 is made of 316L stainless steel, and the support rod 23 adopts a semi-threaded cylindrical structure and is also made of 316L stainless steel. Considering the force-bearing situation of the support rod 23, Q235 steel with better force-bearing performance can also be used. To ensure the stability of the overall structure, the handle 24 and the support rod 23 are welded together, ensuring the stability of the force-bearing of the support rod 23.

[0042] As Figure 1 shown, the special disc 21 adopts a disc structure, which is convenient for debugging the force direction during the later force-bearing process of the steel wire rope 1 to make its force more uniform, and the material used is 316L stainless steel. The annular disc 20 and the support rod 23 are welded together, improving the stability of the overall structure and facilitating the later fixation of the steel wire rope 1.

[0043] As Figure 1 , the material of the fixed support column 28 is selected as 316L stainless steel. A port is left at the bottom of the fixed support column 28 to facilitate the welding and fixing of the fixed support column 28 and the special disc 21. After the steel wire rope 1 is fixed to the object to be taken out, the front end of the steel wire rope 1 passes through the annular disc 20 and then is connected to the fixed support column 28. The fixed support column 28 bears most of the force for driving the object.

[0044] As Figure 1 , the round hole 22 on the special disc 21 facilitates the steel wire rope to pass through the special disc. By rotating the support rod 23 to drive the annular disc 20 to rotate, the steel wire rope 1 has a buffering and pressure-reducing effect on the force, and at the same time, the force direction of the steel wire rope 1 can also be changed, making it more convenient to take out the object.

[0045] Working principle: Insert the wire rope 1 into the narrow space and lower the wire rope 1 until the bottom of the pressing rod 9 touches the bottom. At the same time, the two thin rod bodies 2 descend to both sides of the object. Since the wire rope 1 has a certain hardness, manually push the wire rope 1 downward to drive the thin rod body 2 to continue descending, so that the pressing rod 9 receives the reaction force from the bottom of the narrow space, driving the pressing rod 9 into the box body 8, and pushing the gas on the piston column 12 through the check valve II 16 into the horizontal pipe 15. Then release the wire rope 1. Under the action of the restoring force of the restoring spring 11, drive the cross plate 10 to descend, causing the piston column 12 to descend, so that the external gas enters the box body 8 through the check valve I 14 and the air inlet pipe 13 to supplement the gas, compressing the restoring spring 11. Inflate the inside of the horizontal pipe 15 through the inflation device. Press and lift the wire rope 1 up and down in this way to realize the up and down movement of the thin rod body 2, and thus realize continuous inflation of the horizontal pipe 15, so that the piston block 17 pushes the energy storage spring 18 to move and push the rubber plate 4 to generate a movement trend. Since the rubber plate 4 is connected to the friction pad 6 through the compression spring 5, and the friction pad 6 is blocked by the protrusion 7. The friction pad 6 is made of rubber and can deform. When the thrust received by the friction pad 6 is large enough, the contact position between the friction pad 6 and the protrusion 7 deforms, and at the same time the compression spring 5 will be further squeezed, so that the friction pad 6 slides over the protrusion 7. The function of the protrusion 7 is to increase the frictional resistance. At the same time, the compression spring 5 is in a compressed state and applies a pressure to the friction pad 6, generating friction between the friction pad 6 and the inner wall of the mounting hole 3. Cooperating with the protrusion 7 to block the friction pad 6 makes the friction pad 6 unable to slide easily in the mounting hole 3. As the horizontal pipe 15 is continuously inflated, the thrust applied by the energy storage spring 18 to the rubber plate 4 becomes larger and larger. The thrust transmitted to the friction pad 6 breaks through the frictional resistance received by the friction pad 6 and the frictional resistance given by the protrusion 7. The friction pad 6 and the rubber plate 4 move out of the mounting hole 3, and the rubber plate 4 is instantly tilted and ejected against the object. One end of the energy storage spring 18 abuts against the rubber plate 4, realizing that the two rubber plates 4 are instantly and firmly clamped on both sides of the object. The other side of the thin rod body 2 abuts against the inner wall of the narrow space. Through the cooperation of the two thin rod bodies 2, clamping on both sides of the object is realized;

[0046] Press the special disc 21 against the top of the narrow space, manually rotate the handle 24 to drive the support rod 23 to rotate, drive the annular disc 20 to rotate. During the rotation of the support rod 23, it moves upward, driving the annular disc 20 to rise, causing the fixed support column 28 to rise and pull the wire rope 1 to rise. Lifting the wire rope 1 drives the thin rod body 2 to rise, and the object clamped by the two rubber plates 4 can be taken out in the narrow space.

[0047] The present invention provides a method for using a pick-up telescopic mechanism in a narrow space, which is applied to a pick-up telescopic mechanism in a narrow space as described above, and includes the following steps:

[0048] Step 1. Insert the wire rope 1 into the narrow space. At the same time, lower the two thin rod bodies 2 to both sides of the object. Inflate the inside of the cross tube 15 through the inflation device to drive the piston block 17 to move and compress the energy storage spring 18, and the energy storage spring 18 exerts a thrust on the rubber plate 4;

[0049] Step 2. The compression spring 5 is in a compressed state. Friction is generated between the friction pad 6 and the inner wall of the mounting hole 3. The matching protrusion 7 blocks the friction pad 6 from sliding easily in the mounting hole 3. Through the connection of the compression spring 5, the rubber plate 4 is limited, and the energy storage spring 18 is compressed;

[0050] Step 3. As the inside of the cross tube 15 continues to be inflated, the thrust exerted by the energy storage spring 18 on the rubber plate 4 becomes greater and greater; when the friction force between the friction pad 6 and the inner wall of the mounting hole 3 and the resistance of the protrusion 7 to the friction pad 6 are less than the driving force transmitted by the rubber plate 4 to the friction pad 6, the friction pad 6 slides and presses on the protrusion 7 and continues to slide, the compression spring 5 is compressed, and finally the friction pad 6 slides out of the mounting hole 3. At the same time, the rubber plate 4 moves out of the mounting hole 3, and the rubber plate 4 instantly pops out and abuts against the object. One end of the energy storage spring 18 abuts against the rubber plate 4, realizing that the two rubber plates 4 are instantly clamped on both sides of the object;

[0051] Step 4. Lift the wire rope 1 to drive the thin rod body 2 to rise, and the object clamped by the two rubber plates 4 can be taken out in the narrow space. Embodiment

[0052] As Figures 2-9 shown, the difference between this embodiment and Embodiment 1 is only that the wire rope 1 is replaced with a thin column body 25 fixed at the top of the thin rod body 2. The cross-sectional diameter of the thin column body 25 is the same as the diameter of the thin rod body 2. A lifting rod 26 is fixed above the thin column body 25. A slider 27 is fixed at the top of the thin column body 25. The slider 27 is slidably installed at the bottom of the lifting rod 26. A chute is opened at the bottom of the lifting rod 26, and the slider 27 is slidably installed in the chute. Adjusting the position of the slider 27 can adjust the distance between the two thin column bodies 25. By pulling up and pressing the lifting rod 26 up and down, the up and down movement of the thin rod body 2 is realized for inflation. The thin rod body 2 has high hardness, which is convenient for inflation operation, improves convenience, and adapts to picking parts in different sizes of spaces.

[0053] The above specific embodiments are only several alternative embodiments of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A telescopic mechanism for taking out items in a narrow space, characterized by: It comprises two steel wire ropes (1) and a thin rod body (2) fixed to the steel wire ropes (1); a mounting hole (3) is provided on the thin rod body (2); an inflatable device is fixed to the inner wall of the bottom of the mounting hole (3); The inflating device is connected to a transverse tube (15), a piston block (17) is slidably mounted in the transverse tube (15), one side of the piston block (17) is connected to a force storage spring (18) extending out of the transverse tube (15), a rubber plate (4) is hingedly connected to the inner wall of the bottom of the mounting hole (3), and one end of the force storage spring (18) abuts against the rubber plate (4); Friction devices for generating friction with the inner wall of the mounting hole (3) are arranged on both sides of the rubber plate (4); The inflation device comprises a box body (8) fixedly mounted on the inner wall of the bottom of the mounting hole (3), a transverse tube (15) fixed on one side of the top of the box body (8), a piston column (12) slidably mounted in the box body (8), a pressing rod (9) fixed at the bottom of the piston column (12), the bottom of the pressing rod (9) slidingly passes through the bottom of the box body (8) and the bottom of the thin rod body (2), a transverse plate (10) located below the thin rod body (2) is fixed on the pressing rod (9), a return spring (11) is fixed between the transverse plate (10) and the bottom of the thin rod body (2), an air intake pipe (13) is fixed on the top of the box body (8), a one-way valve (14) is mounted on the air intake pipe (13), and a one-way valve (16) is mounted in one end of the transverse tube (15) close to the box body (8); The friction device comprises a compression spring (5) fixedly mounted on both sides of the rubber plate (4), a friction pad (6) being fixed at one end of the compression spring (5), the friction pad (6) being pressed against the inner wall of the mounting hole (3), and a protrusion (7) located on one side of the friction pad (6) being fixed to the inner walls of both sides of the mounting hole (3).

2. The narrow space picking telescopic mechanism according to claim 1, characterized in that: The cross section of the protrusion (7) is arranged in an isosceles trapezoidal structure.

3. The narrow space picking telescopic mechanism according to claim 1, characterized in that: The invention also comprises a lifting assembly, which comprises an annular disc (20) and a special disc (21) located below the annular disc (20); a support rod (23) is fixedly passed through the annular disc (20); a handle (24) is fixed to the top of the support rod (23); the support rod (23) is threadedly connected to the special disc (21); two fixed pillars (28) are fixed to the top of the annular disc (20); two circular holes (22) are provided on the special disc (21); the top ends of the two steel ropes (1) respectively pass through the two circular holes (22) and are fixedly connected to the fixed pillars (28).

4. The narrow space picking telescopic mechanism according to claim 3, characterized in that: The inner diameter of the circular hole (22) is greater than the cross-sectional diameter of the steel wire rope (1).

5. The narrow space picking telescopic mechanism according to claim 1, characterized in that: The rubber plate (4) is provided with anti-slip grooves.

6. The narrow space picking telescopic mechanism according to claim 1, characterized in that: A stopper (19) is fixed on the inner wall of one end of the transverse tube (15) away from the box body (8).

7. The narrow space picking telescopic mechanism according to claim 1, characterized in that: A thin column (25) is fixed on the top of the thin rod body (2), a lifting rod (26) is fixed above the thin column (25), a slider (27) is fixed on the top of the thin column (25), and the slider (27) is slidably mounted on the bottom of the lifting rod (26).

8. A method for using a telescopic mechanism for taking out items in a narrow space, characterized in that: A narrow space picking telescopic mechanism applied to any one of claims 1 to 6 comprises the following steps: Step 1. Extend the steel wire rope (1) into the narrow space, and at the same time, two thin rods (2) are lowered to the two sides of the object, and the interior of the cross tube (15) is inflated by the inflating device, driving the piston block (17) to move and compress the force storage spring (18), and the force storage spring (18) applies thrust to the rubber plate (4); Step 2. The compression spring (5) is in a compressed state, friction is generated between the friction pad (6) and the inner wall of the mounting hole (3), and the mating protrusion (7) blocks the friction pad (6) from sliding easily in the mounting hole (3). The rubber plate (4) is limited by the connection of the compression spring (5), and the force storage spring (18) is compressed; Step 3. As the air in the transverse tube (15) is continuously inflated, the thrust exerted by the force storage spring (18) on the rubber plate (4) is driven by the compression spring (5) to move the friction pad to break through the resistance of the friction device to the friction pad (6), and the two rubber plates (4) are instantly clamped on both sides of the object; Step 4: The lifting wire rope (1) drives the thin rod (2) to rise, and the object clamped by the two rubber plates (4) can be taken out in the narrow space.

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