Pin pulling-out mechanical device

Abstract

A pin pulling-out mechanical device comprises a driving structure, the driving structure comprises a fixing base, a motor and a connecting frame are arranged on the fixing base, a rotating shaft is arranged at the output end of the motor, a limiting base is arranged on the rotating shaft, multiple sets of limiting balls are arranged on the limiting base, the rotating shaft is sleeved with a rotating sleeve, and multiple sets of limiting grooves matched with the limiting balls are formed in the rotating sleeve. The rotating sleeve is connected with a pendulum bob through a connecting rod, the pendulum bob is connected with a pin through a connecting chain, and the rotating sleeve is connected with a positioning plate arranged on the connecting frame through an elastic piece. By the adoption of the structure, installation and use are convenient, the field adaptability is high, and the working efficiency is greatly improved; potential safety hazards easily caused when a pin is pulled out by a conventional chain block are avoided, and safety risks are essentially avoided; the device is stable in structure, convenient to operate and use, convenient to assemble and disassemble flexibly and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower maintenance, in particular to a mechanical device for pulling out pins. Background Art

[0002] When the hydropower station is under Class A maintenance and Class B maintenance, it is necessary to disassemble the upper frame or the lower frame. When disassembling the upper and lower frames, it is necessary to remove the positioning pins of the frames first. After the unit has been running for a long time, the upper and lower frames are often stuck in the pin holes due to the action of the unit weight, water thrust, etc., and cannot be disassembled normally. Usually, a lifting lug is installed in the threaded hole of the pin, and then a manual hoist is hung on the lifting lug to forcibly pull out the pin. However, when the pin is stuck tightly, the pulling force of the manual hoist is insufficient, not only the pin cannot be pulled out, but also the iron chain of the hoist may break and eject to cause injury. In this regard, on-site construction often uses lubrication or extremely cold methods such as pouring kerosene and liquid nitrogen at the gap, but the effect is difficult to guarantee. Therefore, it is necessary to design a set of fast, efficient and safe pin pulling device to solve the on-site problems. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a mechanical device for pulling out pins, which is convenient to install and use, has a high degree of on-site cooperation, and greatly improves the work efficiency; it avoids the potential safety hazards easily brought by the conventional manual hoist for pulling out pins, and essentially avoids safety risks; the device has a stable structure, is convenient to operate and use, is convenient for flexible loading and unloading, and has strong practicability.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a mechanical device for pulling out pins, including a driving structure, the driving structure includes a fixed seat, a motor and a connecting frame are arranged on the fixed seat, a rotating shaft is arranged on the output end of the motor, a limiting seat is arranged on the rotating shaft, a plurality of limiting balls are arranged on the limiting seat, a rotating sleeve is sleeved on the rotating shaft, a plurality of limiting grooves matched with the limiting balls are arranged on the rotating sleeve, the rotating sleeve is connected with a pendulum through a connecting rod, the pendulum is connected with the pin through a connecting chain, and the rotating sleeve is connected with a positioning plate arranged on the connecting frame through an elastic member.

[0005] In a preferred scheme, the limiting ball is of a hemispherical structure.

[0006] In a preferred scheme, a limiting plate matched with the rotating sleeve is arranged on the rotating shaft.

[0007] In a preferred scheme, the motor is a servo motor.

[0008] The mechanical device for pulling out pins provided by the utility model has the following beneficial effects by adopting the above structure:

[0009] (1) It is convenient to install and use, has a high degree of on-site cooperation, and greatly improves the work efficiency;

[0010] (2)Avoid the potential safety hazards easily brought by pulling out the pin of a conventional chain block, and essentially avoid safety risks.

[0011] (3)The structure of this device is stable, easy to operate and use, convenient for flexible loading and unloading, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is a schematic diagram of the driving structure of the present utility model.

[0015] Figure 3 It is a schematic diagram of the swinging part and the reset structure of the present utility model.

[0016] Figure 4 It is a schematic diagram of the swinging part structure of the present utility model.

[0017] In the figure: fixed seat 1, motor 2, connecting frame 3, rotating shaft 4, limit seat 5, limit plate 6, limit ball 7, rotating sleeve 8, limit groove 9, connecting rod 10, pendulum 11, connecting chain 12, pin 13, positioning plate 14, elastic member 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] As Figures 1-4 shown in, a pin pulling mechanical device includes a driving structure. The driving structure includes a fixed seat 1, on which a motor 2 and a connecting frame 3 are provided. The output end of the motor 2 is provided with a rotating shaft 4, on which a limit seat 5 is provided. Multiple groups of limit balls 7 are provided on the limit seat 5. A rotating sleeve 8 is sleeved on the rotating shaft 4, and multiple groups of limit grooves 9 that cooperate with the limit balls 7 are provided on the rotating sleeve 8. The rotating sleeve 8 is connected to a pendulum 11 through a connecting rod 10, and the pendulum 11 is connected to a pin 13 through a connecting chain 12. The rotating sleeve 8 is connected to a positioning plate 14 provided on the connecting frame 3 through an elastic member 15.

[0019] In a preferred solution, the limit ball 7 is a hemispherical structure. It can not only be limited and cooperate under the elastic pressing force, but also slide and disengage when the force exceeds the range.

[0020] In a preferred solution, a limit plate 6 that cooperates with the rotating sleeve 8 is provided on the rotating shaft 4. Limiting the position interval of the rotating sleeve 8 facilitates its disengagement or being pressed tightly against the limit seat 5 by the elastic force of the elastic member 15, making it more stable and reliable.

[0021] In a preferred solution, the motor 2 is a servo motor. It is convenient to control the rotation amplitude and intermittent forward and reverse rotation of the motor 2, and avoid the collision between the connecting rod 10 and the connecting frame 3 caused by the unidirectional rotation of the motor after pulling out the pin.

[0022] The usage method of the utility model is as follows: Before working, connect the connecting chain 12 with the pin 13 to be pulled out, and then place the fixed seat 1 at a suitable position. The motor 2 controls the amplitude of each rotation through the servo system and then rotates intermittently forward and backward. During the rotation process, with the cooperation of the elastic member 15, the rotating sleeve 8 fits with the limit seat 5, and the limit groove 9 and the limit ball 7 are completely fitted. After rotating until the connecting chain 12 is in a tightened state, due to the force requirement for pulling out the pin 13, the mating relationship between the hemispherical structures of the limit groove 9 and the limit ball 7 slides and disengages, causing the rotating sleeve 8 to separate from the limit seat 5. Under the action of the pendulum 11, the rotating sleeve 8 rotates in the reverse direction, and the rotational force generated by gravity drives the connecting chain 12 to tighten again to pull the pin 13. After the secondary pulling, the rotation amplitude of the rotating sleeve 8 driven by the pendulum 11 decreases, and with the cooperation of the elastic member 15, it presses against and fits with the limit seat 5 again, and the limit groove 9 and the limit ball 7 are completely fitted again. Under the elastic force suppression of the elastic member 15, it rotates again with the output of the motor 2 until the connecting chain 12 is tightened again and then extruded and separated. Repeat the operation of pulling the pin 13 twice, and cycle repeatedly until the pin is pulled out.

[0023] The beneficial effects of the utility model are as follows: It is convenient for installation and use, has a high on-site cooperation degree, and greatly improves the work efficiency; it avoids the potential safety hazards easily brought by the conventional hand chain hoist when pulling out the pin, and essentially avoids safety risks; the device has a stable structure, is convenient for operation and use, is easy to load and unload flexibly, and has strong practicability.

Claims

1. A pin extraction mechanism, comprising a driving structure, characterized in that: The driving structure comprises a fixed seat (1), the fixed seat (1) is provided with a motor (2) and a connecting frame (3), a rotating shaft (4) is provided on the output end of the motor (2), a limiting seat (5) is provided on the rotating shaft (4), a plurality of groups of limiting balls (7) are provided on the limiting seat (5), a rotating sleeve (8) is sleeved on the rotating shaft (4), a plurality of groups of limiting grooves (9) cooperating with the limiting balls (7) are provided on the rotating sleeve (8), the rotating sleeve (8) is connected to a pendulum (11) via a connecting rod (10), the pendulum (11) is connected to a pin (13) via a connecting chain (12), and the rotating sleeve (8) is connected to a positioning plate (14) provided on the connecting frame (3) via an elastic member (15).

2. A pin extraction mechanical device according to claim 1, characterized in that: The limiting ball (7) is a hemispherical structure.

3. A pin extraction mechanical device according to claim 1, characterized in that: The rotating shaft (4) is provided with a limiting plate (6) which cooperates with the rotating sleeve (8).

4. A pin extraction mechanical device according to claim 1, characterized in that: The motor (2) is a servo motor.

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