CN212928574U

CN212928574U - Ball coupling

Info

Publication number: CN212928574U
Application number: CN202021563689.6U
Authority: CN
Inventors: 邱楚锋
Original assignee: Guangzhou Xinhao Precision Technology Co ltd
Current assignee: Guangzhou Xinhao Precision Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-04-09
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a ball coupling, which comprises a first half coupling, a second half coupling, a middle half coupling and a plurality of balls; one side of the first half coupling is provided with a first keycap used for being connected with a shaft, and the other side of the first half coupling is provided with a first groove; one surface of the second half coupling is provided with a second keycap used for being connected with a shaft, and the other surface of the second half coupling is provided with a second groove; the second groove is perpendicular to the first groove; one surface of the middle half coupling is provided with a third groove corresponding to the first groove, and the other surface of the middle half coupling is provided with a fourth groove corresponding to the second groove; the ball bearings are respectively arranged in the first groove and the second groove; the diameters of the first half coupling, the second half coupling and the middle half coupling are the same. The utility model discloses a shaft coupling can reduce the clearance, and very effectual reduction frictional force increases bearing capacity, and the wearability is good, compact structure, long service life.

Description

Ball coupling

Technical Field

The utility model relates to a shaft coupling technical field especially relates to a ball coupling.

Background

The coupling is a device for connecting two shafts or a shaft and a rotating part, rotating together in the process of transmitting motion and power and not separating under normal conditions. Sometimes it is used as a safety device to prevent the coupled machine parts from bearing excessive load, and it plays the role of overload protection.

The coupling is also called coupling. Mechanical parts for firmly coupling the driving shaft and the driven shaft in different mechanisms to rotate together and transmitting motion and torque. Sometimes also to couple the shaft with other parts (e.g. gears, pulleys, etc.). Usually, the two halves are combined and fastened to the two shaft ends by a key or a tight fit, and then the two halves are connected in a certain way. The coupler can compensate the offset between the two shafts due to inaccurate manufacture and installation, deformation or thermal expansion in work and the like; and shock mitigation and absorption. However, when the existing coupler on the market slides relatively, the friction force is very large due to the influence of the contact area and the pressure, the coupler is damaged after long-term friction, and cracks are easily generated to influence the operation precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ball shaft coupling can very effectual reduction frictional force, increases bearing capacity, and the wearability is good, and compact structure guarantees the long service life of shaft coupling.

In order to solve the technical problem, the utility model provides a ball coupling, which comprises a first half coupling, a second half coupling, a middle half coupling and a plurality of balls;

the first half-coupling is of a cylindrical structure, one surface of the first half-coupling is provided with a first keycap for connecting with a shaft, and the other surface of the first half-coupling is provided with a first groove;

the second half coupling is of a cylindrical structure, one surface of the second half coupling is provided with a second keycap for connecting with a shaft, and the other surface of the second half coupling is provided with a second groove; the second groove is perpendicular to the first groove;

the middle half coupling is of a cylindrical structure, one surface of the middle half coupling is provided with a third groove corresponding to the first groove, and the other surface of the middle half coupling is provided with a fourth groove corresponding to the second groove;

the ball bearings are respectively arranged in the first groove and the second groove;

the diameters of the first half coupling, the second half coupling and the middle half coupling are the same.

Preferably, the gear box further comprises a limiting casing for limiting the sliding distance between the first half coupling and the second half coupling; the limiting casing is sleeved on the first half coupling, the second half coupling and the middle half coupling simultaneously.

Preferably, the depth, the length and the width of the first groove, the second groove, the third groove and the fourth groove are consistent.

Preferably, the diameter of the ball is smaller than the width of the first groove, the second groove, the third groove and the fourth groove and larger than the depth of the first groove, the second groove, the third groove and the fourth groove.

Preferably, the first groove, the second groove, the third groove and the fourth groove are in a V-shaped structure.

As a preferred scheme, the first groove passes through the circle center of one surface of the first half coupling; the second groove penetrates through the circle center of one surface of the second half coupling.

The utility model discloses following beneficial effect has:

the utility model discloses a ball shaft coupling sets up the recess respectively at the three of shaft coupling to add the ball in first recess and second recess, when first half-coupling and second half-coupling in gliding, the ball can play the effect that reduces contact surface frictional force, can reduce the clearance, very effectual reduction frictional force, increase bearing capacity, and the wearability is good, compact structure, long service life.

Drawings

Fig. 1 is a schematic structural diagram of a ball coupling provided in an embodiment of the present invention.

Reference numerals: 1. a first half coupling; 2. a second coupling half; 3. a middle half coupling; 4. a ball bearing; 5. a first groove; 6. a second groove; 7. a third groove; 8. a fourth groove; 9. a first keycap; 10. a second keycap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a ball coupling in a preferred embodiment of the present invention includes a first coupling half 1, a second coupling half 2, an intermediate coupling half 3, and a plurality of balls 4;

the first half-coupling 1 is of a cylindrical structure, one surface of the first half-coupling 1 is provided with a first keycap 9 used for being connected with a shaft, and the other surface of the first half-coupling 1 is provided with a first groove 5;

the second half coupling 2 is of a cylindrical structure, one surface of the second half coupling 2 is provided with a second keycap 10 connected with a shaft, and the other surface of the second half coupling 2 is provided with a second groove 6; the second groove 6 is perpendicular to the first groove 5;

the middle half coupling 3 is of a cylindrical structure, one surface of the middle half coupling 3 is provided with a third groove 7 parallel to the first groove 5, and the other surface of the middle half coupling is provided with a fourth groove 8 parallel to the second groove 6;

the balls 4 are respectively arranged in the first groove 5 and the second groove 6;

the diameters of the first coupling half 1, the second coupling half 2 and the intermediate coupling half 3 are the same.

Specifically, the utility model discloses preferred embodiment's ball coupling sets up the recess respectively at the three of shaft coupling to add ball 4 in first recess 5 and second recess 6, when first half-coupling 1 and second half-coupling 2 in gliding, ball 4 can play the effect that reduces contact surface friction power, can reduce the clearance, very effectual reduction frictional force, increase bearing capacity, the wearability is good, compact structure, long service life.

In the preferred embodiment of the utility model, the device also comprises a limit casing used for limiting the sliding distance between the first half coupling 1 and the second half coupling 2; the limiting casing is simultaneously sleeved on the first half-coupling 1, the second half-coupling 2 and the middle half-coupling 3.

Specifically, establish outside through spacing cover shell cover, can restrict sliding position, play the guard action.

In the preferred embodiment of the present invention, the depth, length and width of the first groove 5, the second groove 6, the third groove 7 and the fourth groove 8 are the same.

In the preferred embodiment of the present invention, the diameter of the ball 4 is smaller than the width of the first groove 5, the second groove 6, the third groove 7 and the fourth groove 8, and is greater than the depth of the first groove 5, the second groove 6, the third groove 7 and the fourth groove 8.

In the preferred embodiment of the present invention, the first groove 5, the second groove 6, the third groove 7 and the fourth groove 8 are V-shaped structures.

Specifically, the V-shaped structure can better clamp the ball 4 and realize better sliding.

In the preferred embodiment of the present invention, the first groove 5 passes through the center of a circle of one surface of the first half coupling 1; the second groove 6 passes through the circle center of one surface of the second half coupling 2.

Specifically, the groove penetrates through the circle center respectively to divide the surface into two halves on average, so that the sliding distance is greatly increased, and the groove is more stable.

It should be noted that the utility model discloses a first half-coupling and second half-coupling receive external force to the extrusion of middle half-coupling, realize firm effect to the current shaft coupling sleeve structure of collocation realizes the sliding position of the first half-coupling of restriction and second half-coupling.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A ball coupling, characterized by: the clutch comprises a first half coupling, a second half coupling, a middle half coupling and a plurality of balls;

2. The ball coupling of claim 1, further comprising a spacing sleeve for limiting the sliding distance between the first coupling half and the second coupling half; the limiting casing is sleeved on the first half coupling, the second half coupling and the middle half coupling simultaneously.

3. The ball coupling of claim 1 wherein said first, second, third and fourth grooves are of uniform depth, length and width.

4. The ball coupling of claim 3 wherein said balls have a diameter less than the width of the first, second, third and fourth grooves and greater than the depth of the first, second, third and fourth grooves.

5. The ball coupling of claim 1 wherein said first, second, third and fourth grooves are V-shaped.

6. The ball coupling of claim 1, wherein the first recess passes through a center of a circle of a face of the first coupling half; the second groove penetrates through the circle center of one surface of the second half coupling.