Pneumatic rod with limit self-locking function

Abstract

This utility model discloses a pneumatic rod with a limit self-locking function, relating to the field of pneumatic rods. It includes a fixed rod and a pneumatic extension rod telescopically connected to one end of the fixed rod. A fixed sleeve is fixedly connected to the outside of the fixed rod, and an end cap is fixedly connected to one end of the pneumatic extension rod. Fixed blocks are fixedly connected to both sides of the fixed sleeve, and auxiliary slide rods are slidably installed inside the two fixed blocks. When the pneumatic extension rod is adjusted to the required length, an electromagnet is energized, generating magnetism and tightly adsorbing onto the magnetic layer on the auxiliary slide rod, thereby fixing the auxiliary slide rod and locking the position of the pneumatic extension rod. The two auxiliary slide rods also increase the stability of the pneumatic extension rod's extension. Compared to traditional pneumatic rods that rely on air pressure or mechanical latches for limiting, the adsorption and locking by the electromagnet and the magnetic layer is more precise.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic rods, and in particular to a pneumatic rod with a limit self-locking function. Background Technology

[0002] In numerous fields such as industrial production, furniture manufacturing, medical devices, and automated equipment, pneumatic rods, as transmission components that achieve linear reciprocating motion, are widely used in lifting, tilting, and pushing / pulling scenarios due to their simple structure, fast response speed, and smooth power transmission. Examples include height adjustment of lifting tables, patient positioning on operating tables, joint drive of industrial robotic arms, and pneumatic support for cabinet doors. Traditional pneumatic rods mostly rely on air pressure to maintain position or mechanical latches to achieve positioning. Air pressure positioning is easily affected by fluctuations in air source pressure, causing position drift; mechanical latches can only lock at preset fixed positions and cannot be precisely fixed at any extension or retraction position according to actual needs.

[0003] Therefore, it is necessary to propose a pneumatic rod with a limit self-locking function to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic rod with a limit self-locking function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic rod with a limit self-locking function, comprising a fixed rod and a pneumatic extension rod telescopically connected to one end of the fixed rod, a fixed sleeve fixedly connected to the outside of the fixed rod, an end head fixedly connected to one end of the pneumatic extension rod, fixed blocks fixedly connected to both sides of the fixed sleeve, an auxiliary slide rod slidably installed inside the two fixed blocks, a connecting block fixedly connected to both sides of the end head, and one end of the auxiliary slide rod fixedly connected to the corresponding connecting block; The two fixed blocks have grooves for the auxiliary slide rod to slide through. An electromagnet is fixed inside the groove, and a magnetic layer is provided on the outside of the auxiliary slide rod. When the electromagnet is energized, it is attracted and connected to the magnetic layer.

[0006] Preferably, a conical sleeve is fixed to the top of the fixing block, the inside of the conical sleeve is connected to the inside of the sliding groove, the auxiliary slide rod slides out of the conical sleeve, and an annular sponge is fixed to the inner wall of the conical sleeve by adhesive, the inner diameter of the sponge is adapted to the outer diameter of the auxiliary slide rod; The radius of the top end of the conical sleeve is smaller than the radius of the bottom end.

[0007] Preferably, a blocking block is fixedly connected to the bottom end of the auxiliary slide bar, and the blocking block is disposed below the fixed block; An elastic buffer pad is attached to the side of the blocking block closest to the fixing block.

[0008] Preferably, a connecting wire is fixed to the bottom of each of the two fixing blocks, and one end of the connecting wire is connected to the corresponding electromagnet.

[0009] Preferably, the mating part of the fixed rod and the pneumatic extension rod is provided with at least two sealing rings, and the outer wall of the pneumatic extension rod is subjected to hard anodizing treatment.

[0010] Preferably, the other end of the connecting wire is fixed with a standard connector by injection molding.

[0011] The technical advantages of this utility model are as follows: Once the pneumatic extension rod is adjusted to the required length, the electromagnet is energized, generating magnetism that tightly attracts the magnetic layer on the auxiliary slide rod, thus fixing the auxiliary slide rod in place and locking the position of the pneumatic extension rod. The addition of two auxiliary slide rods increases the stability of the pneumatic extension rod's extension. Compared to traditional pneumatic rods that rely on air pressure or mechanical latches for limiting position, the electromagnet's attraction and locking with the magnetic layer is more precise, allowing for stable locking at any extension position according to actual needs. This is particularly suitable for scenarios requiring high positional accuracy.

[0012] The inner wall of the conical sleeve is fixed with an annular sponge by adhesive. The inner diameter of the sponge matches the outer diameter of the auxiliary slide rod. The conical structure of the conical sleeve can effectively prevent external dust, debris and other impurities from entering the slide groove inside the fixing block, avoiding impurities from adhering to the surface of the auxiliary slide rod or entering the slide groove. At the same time, when the auxiliary slide rod extends or retracts, the outer side of the auxiliary slide rod will rub against the inner side of the annular sponge to remove external impurities adhering to the auxiliary slide rod.

[0013] The conical sleeve guides the sliding of the auxiliary slide rod, ensuring that it always slides in a fixed direction and avoids deviation. At the same time, the annular sponge has a certain degree of elasticity, which reduces friction and collision between the auxiliary slide rod and the conical sleeve during the extension and retraction of the auxiliary slide rod, thus playing a buffering role. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the pneumatic rod with limit self-locking function of this utility model.

[0015] Figure 2 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the internal structure of the fixing block of this utility model.

[0017] In the diagram: 1. Fixed rod; 2. Connecting line; 3. Pneumatic extension rod; 4. Auxiliary slide rod; 5. Connecting block; 6. End; 7. Fixed block; 8. Fixed sleeve; 9. Conical sleeve; 10. Electromagnet; 11. Blocking block; 12. Magnetic layer. Detailed Implementation

[0018] like Figure 1 - Figure 3 As shown, this utility model provides a pneumatic rod with a limit self-locking function, including a fixed rod 1 and a pneumatic extension rod 3 that is telescopically connected to one end of the fixed rod 1. The fixed rod 1 provides stable support for the entire pneumatic rod, and the pneumatic extension rod 3 can telescopically move along one end of the fixed rod 1.

[0019] A fixed sleeve 8 is fixedly connected to the outside of the fixed rod 1. An end head 6 is fixedly connected to one end of the pneumatic extension rod 3. Fixed blocks 7 are fixedly connected to both sides of the fixed sleeve 8. An auxiliary slide rod 4 is slidably installed inside the two fixed blocks 7. Connecting blocks 5 are fixed to both sides of the end head 6. One end of the auxiliary slide rod 4 is fixedly connected to the corresponding connecting block 5. Two fixed blocks 7 have grooves for the auxiliary slide rod 4 to slide through. An electromagnet 10 is fixed inside the groove, and a magnetic layer 12 is provided on the outside of the auxiliary slide rod 4. When the electromagnet 10 is energized, it is attracted to the magnetic layer 12. When the pneumatic extension rod 3 is adjusted to the required length, the electromagnet 10 is energized, and the electromagnet 10 generates magnetism, attracting tightly to the magnetic layer 12 on the auxiliary slide rod 4, thereby fixing the auxiliary slide rod 4 and locking the position of the pneumatic extension rod 3. Compared with the traditional pneumatic rod that relies on air pressure or mechanical latches for limiting, the attraction and locking of the electromagnet 10 and the magnetic layer 12 is more precise and can achieve stable locking at any extension position according to actual needs, which is especially suitable for scenarios with high positional accuracy requirements.

[0020] It should be noted that a displacement sensor can be installed on the fixed rod 1 to detect the extension or retraction of the pneumatic extension rod 3. The displacement sensor is connected to the controller signal. When the pneumatic extension rod 3 extends, the controller controls the electromagnet 10 to automatically energize and complete the adsorption and fixation of the auxiliary slide rod 4.

[0021] When energized, the electromagnet 10 and the magnetic layer 12 exhibit strong attraction, effectively resisting external impacts and vibrations. This prevents the pneumatic extension rod 3 from shifting due to accidental force during use, greatly improving the safety of the pneumatic rod. The electromagnet 10's energization and de-energization control is simple and convenient, allowing for rapid switching via an electronic control system. Compared to traditional mechanical locking structures, it eliminates the need for manual operation of latches or knobs, saving operation time and improving efficiency.

[0022] A conical sleeve 9 is fixed to the top of the fixing block 7. The inside of the conical sleeve 9 is connected to the inside of the sliding groove. The auxiliary slide rod 4 slides out of the conical sleeve 9. An annular sponge is fixed to the inner wall of the conical sleeve 9 by adhesive. The inner diameter of the sponge matches the outer diameter of the auxiliary slide rod 4. The conical structure of the conical sleeve 9 can effectively prevent external dust, debris and other impurities from entering the sliding groove inside the fixing block 7, avoiding impurities from adhering to the surface of the auxiliary slide rod 4 or entering the inside of the sliding groove. At the same time, when the auxiliary slide rod 4 extends or retracts, the outer side of the auxiliary slide rod 4 will rub against the inner side of the annular sponge to remove external impurities adhering to the auxiliary slide rod 4. The conical sleeve 9 guides the sliding of the auxiliary slide rod 4, ensuring that the auxiliary slide rod 4 always slides in a fixed direction and avoids deviation. At the same time, the annular sponge has a certain degree of elasticity, which can reduce the friction and collision between the auxiliary slide rod 4 and the conical sleeve 9 during the extension and retraction of the auxiliary slide rod 4, playing a buffering role. The radius of the top of the conical sleeve 9 is smaller than the radius of the bottom.

[0023] A blocking block 11 is fixedly connected to the bottom end of the auxiliary slide bar 4, and the blocking block 11 is located below the fixed block 7; An elastic buffer pad is attached to the side of the blocking block 11 near the fixed block 7. The blocking block 11 can effectively limit the sliding stroke of the auxiliary slide rod 4 and prevent the auxiliary slide rod 4 from falling out of the internal groove of the fixed block 7 due to excessive extension and retraction of the pneumatic extension rod 3.

[0024] At least two sealing rings are provided at the mating part of the fixed rod 1 and the pneumatic extension rod 3. The outer wall of the pneumatic extension rod 3 is subjected to hard anodizing treatment, which forms a hard oxide film on the outer wall of the pneumatic extension rod 3. This oxide film has extremely high hardness and wear resistance, which can effectively resist the friction between the pneumatic extension rod 3 and the fixed rod 1, the conical sleeve 9 and other components during the extension and retraction process, reducing surface wear. The sealing rings can effectively enhance the sealing between the two and prevent the leakage of compressed air inside the pneumatic rod.

[0025] Both fixed blocks 7 have connecting wires 2 fixed at their bottom ends. One end of the connecting wire 2 is connected to the corresponding electromagnet 10, and the other end of the connecting wire 2 is fixed with a standard connector by injection molding.

Claims

1. A pneumatic rod with a limit self-locking function, characterized in that: It includes a fixed rod (1) and a pneumatic extension rod (3) telescopically connected to one end of the fixed rod (1). A fixed sleeve (8) is fixedly connected to the outside of the fixed rod (1). An end head (6) is fixedly connected to one end of the pneumatic extension rod (3). Fixed blocks (7) are fixedly connected to both sides of the fixed sleeve (8). An auxiliary slide rod (4) is slidably installed inside the two fixed blocks (7). A connecting block (5) is fixed to both sides of the end head (6). One end of the auxiliary slide rod (4) is fixedly connected to the corresponding connecting block (5). A sliding groove is provided on the two fixed blocks (7) for the auxiliary slide rod (4) to slide through. An electromagnet (10) is fixed inside the sliding groove. A magnetic layer (12) is provided on the outside of the auxiliary slide rod (4). When the electromagnet (10) is energized, it is attracted and connected to the magnetic layer (12).

2. The pneumatic rod with limit self-locking function according to claim 1, characterized in that: The top of the fixed block (7) is fixed with a conical sleeve (9), the inside of the conical sleeve (9) is connected to the inside of the sliding groove, the auxiliary slide rod (4) slides out of the conical sleeve (9), the inner side wall of the conical sleeve (9) is fixed with an annular sponge by adhesive, the inner diameter of the sponge is adapted to the outer diameter of the auxiliary slide rod (4); the top radius of the conical sleeve (9) is smaller than the bottom radius.

3. The pneumatic rod with limit self-locking function according to claim 1, characterized in that: The bottom end of the auxiliary slide bar (4) is fixedly connected to a blocking block (11), which is located below the fixed block (7); an elastic buffer pad is attached to the side of the blocking block (11) near the fixed block (7).

4. The pneumatic rod with limit self-locking function according to claim 1, characterized in that: Two fixed blocks (7) are each fixed with a connecting line (2) at the bottom. One end of the connecting line (2) is connected to the corresponding electromagnet (10).

5. The pneumatic rod with limit self-locking function according to claim 1, characterized in that: The mating part of the fixed rod (1) and the pneumatic extension rod (3) is provided with at least two sealing rings, and the outer wall of the pneumatic extension rod (3) is treated with hard anodizing.

6. The pneumatic rod with limit self-locking function according to claim 4, characterized in that: The other end of the connecting line (2) is fixed with a standard connector by injection molding.

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