CN-115875373-B - Replacement-free square key and implementation method

CN115875373BCN 115875373 BCN115875373 BCN 115875373BCN-115875373-B

Abstract

A replacement-free square key and an implementation method thereof are provided, the square key is a cuboid, a pit is arranged in the middle of the upper side surface, a through notch is arranged between the upper side surface and the lower side surface, an upper through groove and a lower through groove are arranged at the corresponding positions on the outer end of the through notch, a transverse hole is horizontally arranged in the middle of the upper through groove and communicated with the pit along the direction of the transverse hole, the square nut is matched and matched with the upper through groove and the lower through groove, the position of the square nut opposite to the transverse hole is horizontally communicated with the square nut, and the adjusting screw is matched and screwed with the square nut to abut against the end face of the wedge. The disassembly and replacement are avoided, the technical requirement for assembly is reduced, and the working quality and efficiency are improved.

Inventors

GE WENJUN
JIN YIFU
XIONG XUANMING

Assignees

扬州大学

Dates

Publication Date: 20260508
Application Date: 20221101

Claims (4)

1. A replacement-free square key consists of a square key, a wedge block, an adjusting screw, a square nut and a decompression alarm assembly, and is characterized in that: The square key is a cuboid, a pit is arranged in the middle of the upper side surface, a through notch is arranged between the upper side surface and the lower side surface, an upper through groove and a lower through groove are arranged at the positions corresponding to the upper end and the lower end of the through notch, a transverse hole is horizontally arranged at the middle of the upper through groove, and a through hole is processed along the transverse hole direction and communicated with the pit; the pressure loss alarm assembly is composed of a pressure sensor and a pressure display, the pressure sensor is arranged in the pit, the pressure display is fixedly arranged in a transverse hole of the upper through groove, and a wire is connected with the pressure sensor and the pressure display through holes.
2. The replacement-free square key according to claim 1, wherein the through notch is wedge-shaped with a small inside and a large outside, and is matched with the wedge-shaped.
3. The replacement-free square key according to claim 1, wherein the square nut is square in shape, a threaded hole is formed in the middle of the square nut to be matched with the adjusting screw, and the distance between the upper through groove and the lower through groove is equal to the height of the square nut.
4. A method for realizing a replacement-free square key according to claims 1-3, characterized in that: under normal conditions, the upper side face and the lower side face of the replacement-free square key are in a tight fit state with two sides of the key groove, when the replacement-free square key is used for a period of time, the upper side face, the lower side face and two sides of the key groove cannot reach the tight fit state, the pressure display displays that the pressure load is insufficient and alarms, the pressure load born by the pressure sensor cannot reach the requirement of a specified value, and the pressure sensor needs to be adjusted, and the adjustment steps are as follows: (1) When the square key and the key groove do not reach a tight fit state without replacement, the adjusting screw matched with the square nut is rotated, the adjusting screw props against the end face of the wedge block, so that the wedge block moves into the through notch, the upper side face and the lower side face are outwards expanded, the upper side face and the lower side face are tightly matched with the two sides of the key groove, meanwhile, the pressure loss alarm assembly works, the pressure sensor bears pressure to react on the pressure display, and the square nut is stopped rotating when the pressure load requirement is met; (2) When the square nut is rotated, the pressure display shows no change in pressure load: A. Reversely rotating the adjusting bolt to leave the square nut, enabling one end of the round bar to penetrate through the screw hole of the square nut until the end face of the wedge block is propped against, applying external force on the other end of the round bar, enabling the wedge block to displace inwards of the penetrating notch, enabling the upper side face and the lower side face of the square key to expand outwards, and when the pressure load requirement is met, indicating that the upper side face, the lower side face and two sides of the key groove of the square key are in a tight fit state again; B. and taking out the round bar, and matching and screwing the adjusting screw and the square nut against the end face of the wedge block to lock.

Description

Replacement-free square key and implementation method Technical Field The invention relates to the technical field of torque transmission by adopting the cooperation of square keys and key grooves, in particular to a replacement-free square key which can adjust the cooperation interval of the square keys and the key grooves to enable the square keys and the key grooves to be in a tight fit state. Background When the mechanical movement adopts a mode of matching the square key with the key groove to transmit torque, the square key is required to be tightly matched with the key groove. Once intermittent looseness occurs, the effect of transmitting torque between the square key and the key groove is affected, mechanical movement is dithered, mechanical damage is caused for a long time, the square key needs to be replaced, and the state of tight fit between the square key and the key groove is restored. The square keys are replaced and assembled, so that the time is consumed, the assembly technical requirement is high, and common operators cannot be qualified. Therefore, the technical scheme that the square key can be replaced without replacing the square key and the key groove are in a tight fit state again is needed. Disclosure of Invention The invention provides a replacement-free square key and an implementation method thereof, which can enable the square key to be matched with a key groove to reach a tight fit state again without replacing the square key, so that the torque transmission effect is not affected. The replacement-free square key can be outwards expanded along two face directions matched with the key groove, and tight fit with the key groove is ensured again. The method can avoid the situation that the square key is not matched with the key slot in use and cannot be matched with the key slot in tight fit, and can also avoid the situation that the square key cannot be matched with the key slot in tight fit in assembly. The invention is realized by the following technical scheme: a replacement-free square key consists of a square key, a wedge block, an adjusting screw, a square nut and a decompression alarm assembly; The square key is a cuboid, a pit is arranged in the middle of the upper side surface, a through notch is arranged between the upper side surface and the lower side surface, an upper through groove and a lower through groove are arranged at the positions corresponding to the upper end and the lower end of the through notch, a transverse hole is horizontally arranged at the middle of the upper through groove, and a through hole is processed along the transverse hole direction and communicated with the pit; the pressure loss alarm assembly is composed of a pressure sensor and a pressure display, the pressure sensor is arranged in the pit, the pressure display is fixedly arranged in a transverse hole of the upper through groove, and a wire is connected with the pressure sensor and the pressure display through holes. The through notch is wedge-shaped with small inside and large outside and is matched with the wedge block in shape, The square nut is square in shape, a threaded hole is formed in the middle of the square nut and matched with the adjusting screw, and the distance between the upper penetrating groove and the lower penetrating groove is equal to the height of the square nut. The implementation method of the replacement-free square key comprises the following steps: under normal conditions, the upper side face and the lower side face of the replacement-free square key are in a tight fit state with two sides of the key groove, when the replacement-free square key is used for a period of time, the upper side face, the lower side face and two sides of the key groove cannot reach the tight fit state, the pressure display displays that the pressure load is insufficient and alarms, and the pressure load applied to the pressure sensor cannot meet the requirement of a specified value and needs to be adjusted. The adjusting steps are as follows: (1) When the square key and the key groove do not reach a tight fit state without replacement, the adjusting screw matched with the square nut is rotated, the adjusting screw props against the end face of the wedge block, the wedge block moves into the through notch, the upper side face and the lower side face are outwards expanded, the upper side face and the lower side face are tightly matched with two sides of the key groove, meanwhile, the pressure loss alarm assembly works, the pressure sensor bears pressure to react on the pressure display, and when the pressure load requirement is met, the square nut is stopped rotating. At this time, the liquid crystal display device, the square key and the key groove are in a tight fit state. (2) When the square nut is rotated, the pressure display shows no change in pressure load: A. The adjusting bolt is reversely rotated to leave the square nut, one end of the round bar penetrates through the screw h