CN219263015U

CN219263015U - Flat key installation mechanism

Info

Publication number: CN219263015U
Application number: CN202320063892.4U
Authority: CN
Inventors: 刘祝斌; 段小军
Original assignee: Irico Hefei LCD Glass Co Ltd
Current assignee: Irico Hefei LCD Glass Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-06-27
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a flat key installation mechanism, which comprises a rotating shaft, a transmission shaft, a flat key, a positioning pin and a jackscrew, wherein the rotating shaft is provided with a shaft hole, the inner wall of the shaft hole is provided with a guide groove, one end of the transmission shaft is connected with the shaft hole in a sliding way along the axial direction, the plug-in end of the transmission shaft is provided with a key groove, a flat key is partially embedded into the key groove and is partially embedded into the guide groove, the groove wall of the key groove is radially provided with the positioning hole along the transmission shaft, the flat key is provided with the positioning pin, the positioning pin is connected with the positioning hole in an adapting way, the flat key is also provided with a notch, the rotating shaft is provided with a threaded hole which is arranged in a radial way, one end of the jackscrew is in threaded connection with the threaded hole, and the axial limit of the flat key is increased through the positioning pin.

Description

Flat key installation mechanism

Technical Field

The utility model relates to the technical field of mechanical connection transmission, in particular to a flat key installation mechanism.

Background

The flat key is a key which uses two side surfaces as working surfaces and transmits torque by extrusion of the key and the side surfaces of the key groove, for example, in a connecting mechanism of a rotating shaft and a transmission shaft, the flat key plays a role in limiting the rotating and slipping of the rotating shaft and the transmission shaft. At present, flat keys are widely used in shaft torque and speed transmission mechanisms.

However, due to the self structure and the assembly characteristics, the flat key can well prevent rotation and slip, but is especially similar to a B-shaped flat key applied to a through key groove and a C-shaped (single round head) flat key applied to a shaft end, lacks of axial limit on the flat key, and when the transmission shaft receives a force in the axial direction of a corresponding rotating shaft, the transmission shaft is easy to slip and fall out of the rotating shaft.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a flat key installation mechanism.

The utility model provides a flat key installation mechanism which comprises a rotating shaft, a transmission shaft, a flat key, a positioning pin and a jackscrew, wherein the rotating shaft is provided with a shaft hole, the inner wall of the shaft hole is provided with a guide groove, one end of the transmission shaft is connected with the shaft hole in a sliding mode along the axial direction, the plug-in end of the transmission shaft is provided with a key groove, the flat key is partially embedded into the key groove and partially embedded into the guide groove, the groove wall of the key groove is radially provided with the positioning hole along the transmission shaft, the flat key is provided with the positioning pin, the positioning pin is connected with the positioning hole in an adapting mode, the flat key is also provided with a notch, the rotating shaft is provided with a threaded hole which is arranged in a radial mode, the jackscrew is in threaded connection with the threaded hole, and one end of the jackscrew can be screwed into the notch.

Preferably, the flat key is also provided with a through hole, and the positioning pin is in fit connection with the through hole.

Preferably, the slot is coaxially arranged and communicates with the through hole.

Preferably, the diameter of the slot is greater than or equal to the diameter of the through hole.

Preferably, the jackscrew is integrally formed with the locating pin.

According to the flat key installation mechanism provided by the utility model, the axial limit of the flat key is increased through the arranged locating pin, and in addition, the axial limit between the rotating shaft and the transmission shaft is increased through the arranged jackscrew, so that the transmission shaft is prevented from being separated from the rotating shaft under the action of external force, and the integrally formed jackscrew and locating pin enable the flat key installation process to be simpler, more convenient and quicker.

Drawings

FIG. 1 is a schematic view of a flat key mounting mechanism according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an assembled positioning pin according to another embodiment of a flat key installation mechanism according to the present utility model;

fig. 3 is a schematic structural diagram of a flat key installation mechanism according to another embodiment of the present utility model before assembling a positioning pin.

Detailed Description

Referring to fig. 1, the flat key installation mechanism provided by the utility model comprises a rotating shaft 1, a transmission shaft 2, a flat key 3, a positioning pin 4 and a jackscrew 5, wherein a shaft hole is formed in the rotating shaft 1, a guide groove is formed in the inner wall of the shaft hole, one end of the transmission shaft 2 is in sliding connection with the shaft hole along the axial direction, a key groove 7 is formed in the connection end of the transmission shaft 2, and the flat key 3 is partially embedded into the key groove 7 and partially embedded into the guide groove.

In this embodiment, the flat key 3 is installed between the key groove 7 and the guide groove, so that the rotating shaft 1 and the transmission shaft 2 are relatively fixed through the flat key 3 in the circumferential direction, and the transmission shaft 2 can be driven to rotate through the flat key 3 when the rotating shaft 1 rotates.

However, in the above embodiment, the rotating shaft 1 and the driving shaft 2 are fixed relatively only in the circumferential direction, and in the process that the driving shaft 2 rotates along with the rotating shaft 1, the flat key 3 may move axially along the driving shaft 2, so that the flat key 3 is separated from the driving shaft 2, in order to avoid the separation of the flat key 3 from the driving shaft 2, the utility model further provides a positioning hole 6 on the groove wall of the key slot 7 along the radial direction of the driving shaft 2, the flat key 3 is provided with a positioning pin 4, and the positioning pin 4 is in fit connection with the positioning hole 6.

In the above embodiment, the rotating shaft 1 and the driving shaft 2 are fixed relatively only in the circumferential direction, and the driving shaft 2 may move axially along the shaft hole during the rotation of the driving shaft 2 along with the rotating shaft 1, so that the driving shaft 2 is separated from the rotating shaft 1.

The flat key 3 is installed by firstly assembling the flat key 3 into a key groove 7 on the transmission shaft 2, inserting the positioning pin 4 into the positioning hole 6, aligning the flat key 3 and the guide groove to plug the transmission shaft 2 into the shaft hole, and then inserting the jackscrew 5 into the threaded hole 10 in a spiral manner until the screwed end of the jackscrew 5 enters a notch 8 on the flat key 3, so that the rotating shaft 1 and the transmission shaft 2 are relatively fixed.

In the above embodiment, in order to facilitate the positioning pin 4 to be directly assembled on the existing flat key 3, processing may be performed on the basis of the existing flat key 3, and the flat key 3 is processed with the through hole 9, and the positioning pin 4 is inserted and connected with the through hole 9 in an adapting manner.

Referring to fig. 2 and 3, the notch 8 and the through hole 9 are coaxially arranged and communicated, the diameter of the notch 8 is larger than or equal to that of the through hole 9, the jackscrew 5 and the positioning pin 4 are integrally formed, and the strength of the jackscrew 5 and the positioning pin 4 can be improved while the installation is convenient.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a flat key installation mechanism, a serial communication port, including pivot (1), transmission shaft (2), flat key (3), locating pin (4), jackscrew (5), the shaft hole has been seted up on pivot (1), the guide way has been seted up on the shaft hole inner wall, transmission shaft (2) one end is along axial and shaft hole slip grafting, keyway (7) have been seted up on the grafting end of transmission shaft (2), in flat key (3) part embedding keyway (7), part embedding guide way, locating hole (6) have been radially seted up along transmission shaft (2) on the cell wall of keyway (7), be equipped with locating pin (4) on flat key (3), and locating pin (4) are pegged graft with locating hole (6) adaptation, notch (8) have still been seted up on flat key (3), threaded hole (10) of radial arrangement have been seted up on pivot (1), jackscrew (5) and threaded hole (10) screwed connection, the one end of jackscrew (5) can screw in to notch (8).

2. The flat key installation mechanism according to claim 1, wherein the flat key (3) is further provided with a through hole (9), and the positioning pin (4) is in fit connection with the through hole (9).

3. A flat key mounting mechanism according to claim 2, characterized in that the slot (8) is arranged coaxially and in communication with the through hole (9).

4. A flat key mounting mechanism according to claim 3, characterized in that the diameter of the slot (8) is greater than or equal to the diameter of the through hole (9).

5. A flat key mounting mechanism according to claim 4, characterized in that the jackscrew (5) is integrally formed with the locating pin (4).