A new type of wedge type air inflation shaft for transfer arm

Abstract

A new type wedge type air inflation shaft for transfer arm belongs to material handling equipment field; The device takes double air path air cylinder as core actuator, can accurately drive piston rod to complete left and right bidirectional linear motion, wedge type inflation block bidirectional initiative control, can not only actively push out key strip, but also can actively withdraw it, fundamentally eliminates the problems of incomplete reset, response delay and jam caused by spring fatigue, significantly improves the action reliability and service life, the mechanism adopts the cooperation design of multiple groups of wedge type sliding blocks and inflation blocks, through the precise machining T type groove and T type boss guide meshing, the axial movement of piston rod is efficiently and synchronously converted into the radial movement of inflation block, when pushing the sliding block to left, the huge radial thrust is generated by using lower wedge surface extrusion, the rubber key strip is strongly inflated, the high stiffness, self locking heavy load clamping is formed; When pulling to right, the upper wedge surface contact forces the inflation block to withdraw radially, drives the key strip to retract quickly, realizes quick and complete release.

Description

Technical Field

[0001] This utility model belongs to the field of material handling equipment, specifically relating to a novel wedge-type air shaft for a transfer arm. Background Technology

[0002] In carbon fiber production, transfer arm robots need to work with air shafts to achieve efficient and stable gripping and transport of heavy spools. Existing air shaft technology has significant shortcomings and cannot fully meet the reliability requirements under high-cycle, heavy-load (e.g., 600kg) conditions.

[0003] Existing pneumatic shafts use air-filled shafts to drive the expansion and contraction of the keybars through inflation and deflation. While this method is simple to operate, it has several drawbacks: the airbags are prone to fatigue and aging due to frequent inflation and deflation, leading to reduced clamping force or even rupture, resulting in low reliability under heavy loads; the airbags are consumable parts and need to be replaced regularly, making maintenance and disassembly complex and causing long downtime; continuous air supply is required to maintain pressure, resulting in high energy consumption, and residual pressure after deflation can cause delayed keybar retraction, affecting release efficiency; the keybar retraction relies on spring reset, and after long-term use, spring fatigue can easily cause incomplete reset, resulting in release jamming or inaccurate release.

[0004] Another type of wedge-shaped air shaft uses an actuator to push out the key bar. Although the structure is simple, it still has a defect in reset capability: it can only push out the key bar in one direction and cannot actively retract it. It relies entirely on an external spring to achieve reset. It also has the risk of response delay, ineffective reset and jamming due to spring fatigue, which affects the accuracy and consistency of the release action.

[0005] In summary, existing air shaft technology has general shortcomings in terms of reliability, dynamic response, maintenance costs, and energy efficiency. There is an urgent need to develop a new type of tensioning mechanism to improve the stability, efficiency, and economy of handling heavy-duty carbon fiber spindles. Summary of the Invention

[0006] The present invention aims to solve the technical problems existing in the prior art and provide a novel wedge-type air shaft for transfer arms.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a novel wedge-type air shaft for a transfer arm, comprising a cylinder and an air shaft body, wherein a cylinder adapter plate is provided between the cylinder and the air shaft body, the air shaft body includes a sleeve, the sleeve having multiple long slots arranged in a ring array, the sleeve having a wedge-shaped slider and a U-shaped fixing seat inside, both arranged coaxially, the U-shaped fixing seat being connected to the right end of the wedge-shaped slider, the cylinder including a piston rod, the piston... The rod extends deep into the sleeve, and a floating shaft is connected to the end of the piston rod. The floating shaft is connected to the U-shaped fixed seat. A T-slot is opened on the wedge-shaped slider at the position corresponding to each long slot. A wedge-shaped expansion block is provided in each T-slot. The wedge-shaped expansion block includes a T-shaped boss that mates with the T-slot. A keyed slider is provided on each wedge-shaped expansion block. A rubber key is connected to each keyed slider. The wedge-shaped expansion block, the keyed slider, and the rubber key can be radially guided and slid in the long slot of the sleeve.

[0008] Preferably, the T-groove includes two lifting ramps, which are arranged with the left side lower than the right side.

[0009] Preferably, the T-shaped boss on the wedge-shaped expansion block that mates with the T-shaped groove consists of two parts, left and right, which mate with two lifting inclined surfaces respectively.

[0010] Preferably, the cylinder is provided with connector one and connector two.

[0011] Preferably, connector one is fixed to the right side of the cylinder, and connector two is fixed to the left side of the cylinder.

[0012] The beneficial effects of this utility model are:

[0013] Employing a dual-air-path cylinder as the core actuator, the piston rod is driven to complete precise linear motion in both left and right directions by selectively filling either connector one or connector two with air. This design achieves bidirectional active control of the wedge mechanism: it can actively extend or retract the key bar, completely eliminating the reliance on tension springs in existing technologies. This fundamentally solves the risks of incomplete reset, delayed response, and jamming caused by spring fatigue, significantly improving the reliability and service life of the operation.

[0014] The design employs a combination of multiple sets of wedge-shaped sliders and wedge-shaped expansion blocks. Through the precise machining of T-grooves and T-shaped bosses, the axial movement of the piston rod is efficiently and synchronously converted into the radial movement of the wedge-shaped expansion blocks. When the wedge-shaped slider is pushed to the left, the lower wedge face contacts and squeezes against the lower wedge platform face, generating a huge radial thrust using the principle of inclined planes. This causes the rubber key strip to expand forcefully, achieving high rigidity and self-locking clamping of the inner hole of the wire spindle, which is sufficient to stably withstand a heavy load of 600kg. When the wedge-shaped slider is pulled to the right, the upper wedge face contacts the upper wedge platform face, forcing the wedge-shaped expansion blocks to retract radially, driving the key strip to retract smoothly, achieving rapid and complete release.

[0015] A floating shaft is installed between the piston rod and the wedge-shaped slider, which can float radially to a certain extent within the hole of the U-shaped fixed seat. This design effectively compensates for coaxiality deviations caused by manufacturing or installation errors or frame deformation, avoids additional radial stress on the piston rod and cylinder, and ensures the service life of the cylinder and the smooth operation of the entire system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance of the air shaft in this embodiment;

[0017] Figure 2 This is a schematic cross-sectional view of the air shaft in this embodiment;

[0018] Figure 3 for Figure 2 AA section view of the "T" shaped groove and "T" shaped boss;

[0019] Figure 4 This is a schematic diagram of the air shaft retracting in this embodiment;

[0020] Figure 5 This is a schematic diagram of the air shaft tightening in this embodiment.

[0021] In the diagram: 1. Cylinder; 11. Connector 1; 12. Connector 2; 13. Piston rod; 2. Air shaft body; 21. Cylinder adapter plate; 22. Sleeve; 221. Long slot; 23. Wedge slider; 231. T-slot; 2311. Upper wedge face; 2312. Lower wedge face; 24. Wedge expansion block; 241. T-shaped boss; 2411. Upper wedge platform face; 2412. Lower wedge platform face; 25. Key bar slider; 26. Rubber key bar; 27. U-shaped fixing seat; 28. Floating shaft; 29. ​​Lifting ramp. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] Example: A novel wedge-type air shaft for a transfer arm, such as Figures 1-3As shown, the device includes a cylinder 1 and an air shaft body 2. Its features include: a cylinder 1 adapter plate between the cylinder 1 and the air shaft body 2; the air shaft body 2 includes a sleeve 22 with multiple long slots 221 arranged in a circular array on the sleeve 22; a wedge-shaped slider 23 and a U-shaped fixing seat 27 are provided inside the sleeve 22, both coaxially arranged; the U-shaped fixing seat 27 is connected to the right end of the wedge-shaped slider 23; the cylinder 1 includes a piston rod 13 that extends into the sleeve 22; and a floating shaft 28 is connected to the end of the piston rod 13. The floating shaft 28 is connected to the U-shaped fixed seat 27. A T-slot 231 is provided on the wedge slider 23 at a position corresponding to each long slot 221. A wedge expansion block 24 is provided in each T-slot 231. The wedge expansion block 24 includes a T-shaped boss 241 that mates with the T-slot 231. A keyed slider 25 is provided on each wedge expansion block 24. A rubber key 26 is connected to each keyed slider 25. The wedge expansion block 24, the keyed slider 25 and the rubber key 26 can be radially guided and slid in the long slot 221 of the sleeve 22.

[0024] The T-groove 231 includes two lifting ramps 29, which are arranged with the left side lower than the right side.

[0025] The T-shaped boss 241 on the wedge-shaped expansion block 24 that mates with the T-shaped groove 231 consists of two parts, left and right, which mate with the two lifting inclined surfaces 29 respectively.

[0026] The cylinder 1 is provided with a connector 11 and a connector 12. The connector 11 is fixed to the right side of the cylinder 1, and the connector 12 is fixed to the left side of the cylinder 1.

[0027] The principle of this utility model:

[0028] Key bar bulges out (clamping action):

[0029] When compressed air is injected into the left side of cylinder 1 from connector 2 12, it pushes piston rod 13 to move to the right. Piston rod 13 drives U-shaped fixed seat 27 through floating shaft 28, which in turn drives wedge slider 23 to slide to the right in sleeve 22. At this time, the lower wedge face 2312 of T-groove 231 on wedge slider contacts and squeezes the lower wedge face 2412 of T-protrusion 241 on wedge expansion block 24. Using the mechanical principle of inclined plane, the axial movement of piston rod 13 is converted into radial outward movement of wedge expansion block 24. Wedge expansion block 24 pushes key strip slider 25 to extend radially outward along the long groove 221 of sleeve, and forces rubber key strip 26 to expand outward, thereby tightly pressing the inner hole of material and achieving reliable clamping.

[0030] Key bar retracts (release action):

[0031] When compressed air is injected into the right side of cylinder 1 from connector 11, it pushes piston rod 13 to move to the left. Piston rod 13 drives wedge slider 23 to slide to the left in the sleeve through floating shaft 28 and U-shaped fixed seat 27. At this time, the upper wedge surface 2311 of T-groove 231 on wedge slider 23 contacts the upper wedge platform surface 2411 of T-protrusion 241 on wedge expansion block 24 and produces relative sliding. Due to the guiding effect of inclined surface cooperation, wedge expansion block 24 is subjected to a centripetal radial force, causing it to slide inward along T-groove. Wedge expansion block 24 drives key strip slider 25 to move radially inward along long groove, finally causing rubber key strip 26 to retract completely and release the tension on the material.

[0032] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A novel wedge-type air shaft for a transfer arm, comprising a cylinder (1) and an air shaft body (2), characterized in that: A cylinder (1) adapter plate is provided between the cylinder (1) and the air shaft body (2). The air shaft body (2) includes a sleeve (22). Multiple long slots (221) are arranged in a ring array on the sleeve (22). A wedge slider (23) and a U-shaped fixing seat (27) are provided inside the sleeve (22). The two are arranged on the same axis. The U-shaped fixing seat (27) is connected to the right end of the wedge slider (23). The cylinder (1) includes a piston rod (13). The piston rod (13) extends into the sleeve (22). A floating shaft (28) is connected to the end of the piston rod (13). The floating shaft (28) is connected to the U-shaped fixing seat (27). A T-slot (231) is opened at the position corresponding to each long slot (221) on the wedge slider (23). A wedge expansion block (24) is provided in each T-slot (231).

2. A novel wedge-type air shaft for a transfer arm according to claim 1, characterized in that: The wedge-shaped expansion block (24) includes a T-shaped boss (241) that mates with the T-shaped groove (231). Each wedge-shaped expansion block (24) is provided with a keyed slider (25), and each keyed slider (25) is connected with a rubber key (26). The wedge-shaped expansion block (24), the keyed slider (25), and the rubber key (26) can be radially guided and slid in the long slot (221) of the sleeve (22).

3. A novel wedge-type air shaft for a transfer arm according to claim 1, characterized in that: The T-groove (231) includes two lifting ramps (29), which are arranged with the left side lower than the right side.

4. A novel wedge-type air shaft for a transfer arm according to claim 1, characterized in that: The T-shaped boss (241) on the wedge-shaped expansion block (24) that mates with the T-shaped groove (231) consists of two parts, left and right, which mate with the two lifting inclined surfaces (29) respectively.

5. A novel wedge-type air shaft for a transfer arm according to claim 1, characterized in that: The cylinder (1) is provided with connector one (11) and connector two (12).

6. A novel wedge-type air shaft for a transfer arm according to claim 4, characterized in that: The first connector (11) is fixed to the right side of the cylinder (1), and the second connector (12) is fixed to the left side of the cylinder (1).

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