TWI648488B - Ball screw structure with detection function - Google Patents

Abstract

A ball screw structure with a detecting function, comprising a screw shaft having an externally threaded groove; a nut member displaceably disposed on the screw shaft along an axial direction of the screw shaft, and the nut member has an internally threaded groove therein The thread groove is disposed corresponding to the thread groove of the screw shaft, so that a load passage is formed between the inner thread groove of the nut member and the thread groove outside the screw shaft; the ball assembly is rollably disposed in the load passage; and a return cover plate is Directly disposed on the nut member, the reflow cover is provided with a microcontroller and a sensor and can sense the rotation state of the screw shaft in the nut member, and the reflow cover is provided with a reflow The ball can be connected to the nut member for the ball assembly to flow back through.

Description

Ball screw structure with detection function

The present invention relates to a ball screw device, and more particularly to a ball screw structure having a detecting function.

The ball screw is a linear transmission device with high load at present, but if the screw runs at a speed too high, the accessory (for example, the return cover plate) is easily subjected to excessive impact by the steel ball, causing damage to the component and causing the screw to be stuck. The manner in which the shaft is rotated is additionally provided with a sensor in the original ball screw structure, for example, Japanese Patent Nos. JPA2008144938, JPA2007225024, and JPB5722365.

In view of the aforementioned Japanese patent JPA2008144938, an additional block sensing element is required, and the length of the nut member is thus lengthened, resulting in an influence on the stroke, and an additional controller is required to switch the switch; JPA2007225024, a groove is provided on one end surface of the nut or the nut, and the sensing device is placed in the groove, and the sensing device is used to measure the displacement state of the steel ball, so the sensing device increases the nut The length and the magnetic mechanism for maintaining the position of the steel ball are too complicated; for the aforementioned Japanese patent JPB5722365, both the sensor and the controller need to be externally connected, resulting in the need to change the configuration or size of the nut.

In order to solve the shortcomings of the prior art, the present invention provides a ball screw structure with a detecting function, which directly mounts a microcontroller and a sensor on a reflow cover, and the inside of the reflow cover is straight. The return channel is provided for the ball assembly to flow back through, and is detachably mounted on the flat portion of the nut member, so that the space of the screw shaft can be directly sensed, and the sensed screw can be directly sensed. The status signal is light or dark (such as a buzzer), light (such as a light-emitting diode) is light or dark, or is transmitted to the receiving unit by wireless or wired using a signal output unit (such as a computer, a smart phone, a Pad, etc.). ), thereby achieving the efficacy of diagnosing and measuring the state of the screw shaft.

In order to achieve the above object, the present invention provides a ball screw structure having a detecting function, comprising a screw shaft having an externally threaded groove; and a nut member displaceably displaceable along an axial direction of the screw shaft In the screw shaft, and the nut member has an internal thread groove corresponding to the screw groove outside the screw shaft, such that the internal thread groove of the nut member and the external thread groove of the screw shaft Forming a load channel; a ball assembly rotatably disposed in the load channel; and a reflow cover plate detachably disposed on the nut member and sensible in the nut member A rotating state of the screw shaft, and a return passage is disposed in the return cover, and the nut member is connected to allow the ball assembly to flow back through.

In some embodiments, the reflow cover includes a cover body and two recesses, the cover body is disposed on the nut member, and the two recesses are disposed on the cover body facing the nut member. One surface, one of the grooves accommodates a microcontroller, and the other of which accommodates a sensor.

In some embodiments, the nut member is disposed away from an end surface of the return cover plate with a first receiving groove for receiving a battery, and the battery is electrically connected to the return cover; the nut member A second receiving slot is disposed on an end surface of the returning cover plate for receiving an alarm unit. The warning unit is a buzzer or a light emitting diode.

In some embodiments, the surface of the nut member facing the cover body is provided with a connecting wire guiding slot, so that the microcontroller and the sensor line pass through the connecting wire guiding slot respectively. The battery is electrically connected.

In some embodiments, the sensor is an accelerometer.

100‧‧‧Rolling screw structure with detection function

1‧‧‧Screw shaft

11‧‧‧External thread groove

2‧‧‧ nut parts

21‧‧‧Threaded groove

22‧‧‧ body

221‧‧‧flat

222‧‧‧ screw holes

223‧‧‧Return hole

23‧‧‧Outer ring

24‧‧‧First accommodating slot

25‧‧‧Second accommodating slot

26‧‧‧Line guide slot

3‧‧‧Ball components

4‧‧‧Return cover

40‧‧‧ Cover body

41‧‧‧Perforation

42‧‧‧ Groove

43‧‧‧ Groove

44‧‧‧Microcontroller

45‧‧‧Sensor

46‧‧‧Signal output unit

47‧‧‧Return

48‧‧‧Connector guide groove

5‧‧‧Battery

6‧‧‧Warning unit

9‧‧‧ screws

T‧‧‧ load channel

The first figure is a schematic exploded view of the front side of the ball screw structure with detection function of the present invention.

The second figure is a schematic view of the rear side of the ball screw structure with the detection function of the present invention.

The third figure is a combination diagram of the first figure.

The fourth figure is a schematic cross-sectional view of the ball screw structure with the detection function of the present invention.

The fifth figure is a circuit block diagram of the ball screw structure with the detection function of the present invention.

To enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following for a brief description of the drawings.

Referring to the first to fifth figures, the ball screw structure 100 of the present invention has a detecting function, and includes a screw shaft 1, a nut member 2, a ball assembly 3, and a reflow cover 4.

The screw shaft 1 has an externally threaded groove 11.

The nut member 2 is displaceably sleeved on the screw shaft 1 along the axial direction of the screw shaft 1, and the nut member 2 has an internal thread groove 21, and the internal thread groove 21 is disposed corresponding to the screw groove 11 of the screw shaft 1, A load passage T is formed between the threaded groove 21 of the nut member 2 and the threaded groove 11 of the screw shaft 1; wherein the nut member 2 has a tubular body 22 and an outer convex ring 23, and the outer convex ring 23 One end of the tubular body 22 is radially outwardly projecting, and the internal thread groove 21 is disposed on the inner diameter surface of the tubular body 22, and the upper portion of the tubular body 22 is formed with a flat portion 221, two screw holes 222 and two reflows. Hole 223.

The ball assembly 3 may be composed of a plurality of balls that are rollably disposed within the load passage T.

The return cover 4 is detachably disposed on the nut member 2, and can sense a rotating state of the screw shaft 1 in the nut member 2, and a return passage 47 is disposed in the return cover 4 for the ball Component 3 via The reflowing cover 223 is reflowed; that is, the reflow cover 4 can include a cover body 40, two through holes 41, and two grooves 42 and 43. The two through holes 41 are formed in the flat surface of the cover body 40 away from the nut member 2. a surface of the portion 221, through which the two screws 9 are threaded and screwed to the two screw holes 222 to cover the return cover 4 on the flat portion 221 of the tubular body 22 of the nut member 2, The recesses 42 and 43 are disposed on a surface of the cover body 40 facing the flat portion 221 of the nut member 2, wherein a recess 42 receives a microcontroller 44, and the other recess 43 receives a sensor 45. The sensor 45 can be an acceleration gauge, but is not limited thereto.

In addition, the outer ring 23 of the nut member 2 is provided with a first accommodating groove 24 and a second accommodating groove 25 for receiving a battery 5, and the battery 5 is disposed on the return cover. The microcontroller 44 and the sensor 45 in the board 4 are electrically connected; the second receiving slot 25 is used for receiving a warning unit 6, and the warning unit 6 can be a buzzer or a light-emitting component. The illuminating component can be at least one illuminating diode, but is not limited thereto.

The microcontroller 44 can output the signal sensed to the screw shaft 1 to a receiving unit by wireless or wired through a signal output unit 46 (as shown in FIG. 5), and the receiving unit can be a computer or a smart type. The device that senses the screw shaft 1 can also directly transmit the signal to the warning unit 6 by using a device such as a mobile phone or a pad.

Furthermore, the reflow cover 4 is further provided with a connecting wire guiding groove 48. The connecting wire guiding groove 48 can be connected to the sensor 44 and the sensor 45 by wires, and then through a line guiding groove 26. It is electrically connected to the battery 5. It is worth mentioning that the microcontroller 44 and the sensor 45 can be connected to the microcontroller 44 and the sensor 45 in a wired manner via a wire connection.

With the above structure, it is not necessary to additionally add a sensing element to the nut, but is directly mounted on the reflow cover 4, and the return plate 4 is directly provided with a return passage 47 for the ball assembly 3 to flow back through, and Removably mounted on the flat portion 221 of the nut member 2, space can be saved, and the rotation state of the screw shaft 1 can be directly sensed, and the sensed screw state signal can be transmitted to the warning unit 6 to sound ( Such as a buzzer), light (such as a light-emitting diode) is light or dark, or is transmitted by the signal output unit 46 in a wireless or wired manner. To the receiving unit (such as computer, smart phone, Pad, etc.), in order to measure the rotation state of the screw shaft.

Claims (8)

A ball screw structure having a detecting function, comprising: a screw shaft having an external thread groove; a nut member displaceably disposed on the screw shaft along an axial direction of the screw shaft, and the nut The piece has an internal thread groove corresponding to the thread groove of the screw shaft, such that the internal thread groove of the nut member forms a load passage with the external thread groove of the screw shaft; a ball assembly Circulatingly disposed in the load channel; and a reflow cover plate detachably disposed on the nut member, and provided with a microcontroller and a sensor for sensing in the nut member a rotating state of the screw shaft, and a return passage is disposed in the return cover plate to communicate with the nut member for reflowing the ball assembly, wherein the return cover plate comprises a cover body and a concave surface The groove is disposed on a surface of the cover body facing the nut member, wherein a groove receives the microcontroller, and another groove receives the sensor. The ball screw structure with a detecting function according to the first aspect of the invention, wherein the nut member is provided with a first receiving groove for receiving a battery, the battery and the microcontroller and the The sensor is electrically connected. The ball screw structure with the detecting function described in claim 2, wherein the nut member is further provided with a second receiving groove for receiving an alarm unit. The ball screw structure with a detecting function as described in claim 3, wherein the warning unit is a buzzer or a light emitting diode. The ball screw structure with a detecting function according to the second aspect of the invention, wherein a surface of the nut member facing the cover plate is provided with a connecting wire guiding groove, and the connecting wire guiding groove is connected. The sensor and the microcontroller are electrically connected to the battery. The ball screw structure with detection function according to claim 1, wherein the sensor is an acceleration gauge. The ball screw structure having the detecting function according to claim 1, wherein the microcontroller can output the signal sensed to the screw shaft to a receiving unit through a signal output unit in a wireless or wired manner. . The ball screw structure having the detecting function according to claim 1, wherein the microcontroller and the sensor are connectable through a wire, and the external power source is wired to the microcontroller and the sense Detector.