KR102270914B1 - Linear transmission device - Google Patents

Abstract

A linear transmission device is provided with a thermally conductive member in an endless circulation path. The thermally conductive member is made of a thermally conductive metal. When a rolling unit rolls in the endless circulation path and comes into contact with the contact surface of the thermally conductive member, a temperature change inside a moving module may be transmitted to a thermal energy sensing unit. The thermal energy sensing unit sends a detection signal to a management terminal to determine whether the linear transmission device is abnormal. A feature of the present invention is to obtain the temperature change inside the moving module using direct measurement, which reduces occurrence of errors caused by inaccurate measurement signals. Thus, when the linear transmission device is abnormal, the abnormality can be detected immediately and accurately, and a purpose of early warning and real-time monitoring can be achieved.

Description

Linear transmission device {LINEAR TRANSMISSION DEVICE}

The present invention relates to a linear transmission device, and more particularly to a linear transmission device having a thermally conductive member.

Reference is made to FIG. 1 , which is one of the drawings in Taiwan Patent (201040413) which shows a transmission device with a temperature sensing device. The temperature sensing device essentially includes a power supply (not shown), a thermal sensor 10 and an alert device 11 . After the thermal sensor 10 absorbs the thermal energy of the transmission device, the resistance value of the transmission device will decrease, and the warning device 11 will turn on and send a signal to notify the user or start the cooling device to cool the transmission device As a result, the transmission device will not have the problems of poor positioning accuracy, poor lubrication, or low efficiency due to high temperatures.

However, besides the fact that the transmission device described above requires an additional cooling device, the temperature detection of the transmission device is an indirect measurement. Therefore, it is impossible to accurately grasp the change in the internal temperature of the moving module from the point of view of temperature measurement, which makes the measured signal of the thermal sensor 10 inaccurate, causing errors, and even a long measurement time, poor measurement efficiency. can cause etc.

Reference is made to US Pat. No. 4,939,920A, which provides a mechanical temperature sensing device. When the temperature is higher than the predetermined temperature, the mechanical action cuts off the power to protect the equipment. However, the device cannot be used again. Also, there is a situation where the conduction efficiency is poor because the mechanical structure is too complex and conducts indirectly.

Further, referring to Japanese patent JP201725941A, it includes a spring member (refer to reference numeral 232 in the representative view of JP201725941A) and a sensor for detecting the amount of deformation or vibration of the spring member (refer to 233 in the representative view of JP201725941A) Although the rolling state of the rolling element is measured with high accuracy by providing a linear motion guide device, this design is not perfect. In order to maintain the accuracy of the measurement, it must be pre-measured and adjusted later. This structure is not only time-consuming and labor-intensive, but it is also prone to problems such as shortened lifespan because the internal temperature change cannot be measured in real time.

Accordingly, the method for solving the above-described problems and defects is the direction the present invention is to improve.

One object of the present invention is to provide a linear transmission device that uses direct measurement to obtain temperature energy inside a moving module to achieve the purpose of real-time monitoring.

In order to achieve the above object, the linear transmission device provided by the present invention,

an elongate shaft extending along the axial direction and having a rolling groove;

A moving module sleeve-coupled on the elongate shaft and movable back and forth along the axial direction, wherein the moving module has a main body, a plurality of return holes penetrating the main body, and rolling formed in the main body and corresponding to the rolling grooves. a moving module provided with a groove, wherein the rolling groove of the moving module and the rolling groove of the elongate shaft form a rod path;

a return assembly disposed on the body and in communication with the rod path, the return assembly comprising a return portion and at least one first return channel formed by the return portion, the at least one first return channel and the plurality of returns a return assembly, the aperture and the rod path defining an endless circulation path;

a rolling unit disposed in the endless circulation path in a rolling manner;

at least one thermally conductive member disposed within the endless circulation path; and

a thermal energy sensing unit connected to the at least one thermally conductive member to detect a temperature of the at least one thermally conductive member and generate a sensing signal

includes

Advantageously, said linear transmission device is a linear guideway, said return assembly comprising an end cover disposed on a mounting surface of said body, and a cover plate disposed between said end cover and said mounting surface, said end A cover is provided with a plurality of the first return channels, the cover plate is provided with a plurality of second return channels corresponding to the plurality of first return channels, and there are two of the thermally conductive members, the two A thermally conductive member is removably or non-removably disposed within the plurality of first return channels of the end cover, each of the two thermally conductive members comprising a contact surface and two return grooves, the contact surface is provided for the rolling unit to contact and transfer the thermal energy of the rolling unit, the two return grooves are provided with the contact surface and are respectively connected to the second return channel, the thermal energy sensing unit is the heat energy sensing unit It is electrically connected to the conductive member and disposed on one side of the end cover.

Preferably, the linear transmission device is a ball screw, the return assembly is an external return pipe extending through the mounting surface of the body, there is only one thermally conductive member, and the thermally conductive member is the external return pipe fixed to the pipe.

Accordingly, the present invention provides a linear transmission device, wherein a thermally conductive member is provided primarily in an endless circulation path. At least one thermally conductive member is made of thermally conductive metal. Therefore, when the rolling unit rolls in the endless circulation path and comes into contact with the contact surface of the at least one thermally conductive member, the temperature change inside the moving module can be transmitted to the thermal energy sensing unit, and the thermal energy sensing unit manages the sensing signal. It is transmitted to the terminal to determine whether the linear transmission device is abnormal. A feature of the present invention is to obtain the temperature change inside the moving module using direct measurement, which reduces the occurrence of errors caused by inaccurate measurement signals, so that when the linear transmission device is abnormal, it can be detected immediately and accurately, thereby to achieve the purpose of early warning and real-time monitoring by

These, together with other objects of the invention, together with the various novel features which characterize it, will be particularly pointed out in the claims which follow and form a part of this specification. For a better understanding of the present invention, its operational advantages and the specific objects obtained by its use, reference should be made to the accompanying drawings and the detailed description set forth with respect to preferred embodiments of the present invention.

According to the present invention, it is possible to provide a linear transmission device that achieves the purpose of real-time monitoring by obtaining temperature energy inside a moving module using direct measurement.

1 is a schematic diagram of a transmission device with a temperature sensing device of Taiwan Patent (201040413);
Fig. 2 is a perspective assembly view of the first embodiment of the present invention, showing that the linear transmission device is a linear guideway;
3 is an exploded perspective view of a first embodiment of the present invention;
Fig. 4 is an operational diagram of a first embodiment of the present invention;
5A is a first plan view of a thermal energy sensing unit according to a first embodiment of the present invention;
5B is a second plan view of a thermal energy sensing unit according to a first embodiment of the present invention;
6 is an exploded perspective view of a second embodiment of the present invention;
7 is a perspective view of a return module according to a third embodiment of the present invention;
Fig. 8 is a cross-sectional view of a fourth embodiment of the present invention;
Fig. 9 is a perspective view of a fifth embodiment of the present invention;
Fig. 10 is a perspective view of a sixth embodiment of the present invention, showing that the linear transmission device is a ball screw;
11 is an exploded perspective view of a seventh embodiment of the present invention;
Fig. 12 is a cross-sectional view of the embodiment of Fig. 11;
13 is an exploded perspective view of an eighth embodiment of the present invention;
Fig. 14 is an enlarged cross-sectional view of the embodiment of Fig. 13;
15 is a perspective view of a ninth embodiment of the present invention;
Fig. 16 is a cross-sectional view of the embodiment of Fig. 15;
17 is a flowchart of an embodiment of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which show, for illustrative purposes only, a preferred embodiment according to the invention.

2 to 5B , a linear transmission device according to a first embodiment of the present invention is shown, and the linear transmission device is a linear guideway, but is not limited thereto, or as shown in FIG. it is screw The linear transmission device comprises an elongate shaft 20, a moving module 30, a return assembly 40, a rolling unit 50, two thermally conductive members 60, a thermal energy sensing unit 70, and an oil scraper ( 80).

The elongate shaft 20 extends in the axial direction X and has a rolling groove 21 . In this embodiment, the elongate shaft 20 is a rail.

The moving module 30 is sleeve-coupled on the elongate shaft 20 and reciprocates along the axial direction (X). The moving module 30 includes a body 301 , a mounting surface 31 at one end of the body 301 , a plurality of return holes 32 extending through the mounting surface 31 , and a rolling groove 21 . Corresponding rolling grooves 33 are provided. The rolling groove 33 and the rolling groove 21 form a rod path P1. The moving module 30 in this embodiment is a slide block.

The return assembly 40 is disposed on the mounting surface 31 of the body 301 and in communication with the rod path P1 , and an end cover 41 and an end disposed on the mounting surface 31 of the body 301 . and a cover plate 42 disposed between the cover 41 and the mounting surface 31 . The end cover 41 is provided with a plurality of return portions 411 and a plurality of first return channels T1 formed by each return portion 411 , and the cover plate 42 is provided with a plurality of first return channels A plurality of second return channels T2 corresponding to T1 are provided. The plurality of first return channels T1 , the plurality of second return channels T2 , the plurality of return holes 32 and the rod path P1 together form an endless circulation path P2 .

The rolling unit 50 is arranged in the endless circulation path P2 in a rolling manner. In this embodiment, the rolling unit 50 is, for example, in the form of a plurality of rolling balls, but is not limited thereto. In another embodiment, the rolling unit 50 also includes a chain belt and a plurality of rollers disposed within the chain belt.

The two thermally conductive members 60 are removably disposed on the endless circulation path P2 and are respectively installed in the plurality of first return channels T1 of the end cover 41 (shown in FIG. 5 ). Each thermally conductive member 60 is recessed with a return groove 61 disposed on the return portion 411 and together forming a first return channel T1 having the return portion 411 , and an end cover 41 . and convexly matching two engaging portions 62 . Each return groove 61 has a contact surface 611 for sensing the thermal energy of the rolling unit 50 when the rolling unit 50 collides, and each return groove 61 has a second return channel T2 ), and an electrical contact 621 is provided at the rear end of each engaging portion 62 . In this embodiment, the thermally conductive member 60 is made of copper, but is not limited thereto. In other embodiments, the thermally conductive member 60 may also be made of other metallic materials, such as gold, silver, or aluminum, as long as the ^{thermal conductivity is higher than 250 Wm −1} K ^{−1 .} The rolling unit 50 sends thermal energy due to friction to the contact surface 611 , so that the present invention can accurately measure the temperature change inside the moving module 30 .

The thermal energy sensing unit 70 is electrically connected to the two thermally conductive members 60 and disposed on one side of the end cover 41 , the housing module 71 having an electrical connection board 711 , the electrical connection A microprocessor module 72 disposed on the board 711 , a signal transmission module 73 disposed on the electrical connection board 711 , a microprocessor 72 and signal transmission disposed on the electrical connection board 711 . and a power module 74 coupled to module 73 (shown in FIG. 5A ). The electrical connection board 711 is in point contact with the plurality of electrical contacts 621 , and when the rolling unit 50 strikes the contact surface 50 of the thermally conductive member 60 (shown in FIG. 4 ), heat The microprocessor module 72 of the energy sensing unit 70 generates a sensing signal and transmits the sensing signal to the signal transmission module 73 . The signal transmission module 73 receives the detection signal transmitted by the microprocessor 72, and then outputs the detection signal to the management terminal (shown in Fig. 17), which is an Android, IOS or Windows smartphone, a notebook computer. , a mobile wearable device, or a tablet computer. When the temperature inside the moving module 30 rises abnormally, the detection signal reminds the user to pay attention to lubrication, and provides an oil injection warning function and an abnormality detection function to achieve the purpose of real-time monitoring.

The oil scraper 80 abuts against the housing module 71 of the thermal energy sensing unit 70 and covers the microprocessor module 72 , the signal transmission module 73 , and the power module 74 .

The above is a description of the structure and configuration of the main components of the first embodiment of the present invention.

Therefore, a feature of the present invention is to obtain the temperature change inside the moving module by direct measurement, which improves the disadvantages of the conventional indirect measurement, and reduces the occurrence of errors caused by inaccurate measurement signals, so that the linear transmission device is abnormal. can be detected immediately and accurately, thereby achieving the purpose of early warning and real-time monitoring.

Reference is made to FIG. 6 . In order to achieve the above object, the linear transmission device according to the second embodiment of the present invention also has an elongated shaft 20 , a moving module 30 , a return assembly 40 , a rolling unit 50 , two thermally conductive parts. a member 60 , a thermal energy sensing unit 70 , and an oil scraper 80 . Since the configuration and effects of the second embodiment are the same as those of the first embodiment, they will not be described again. The difference is as follows.

The two thermally conductive members 60 are non-removably fixed to the plurality of first return channels T1 of the end cover 41 , thereby eliminating the assembly step, facilitating production and manufacturing, cost and assembly It is possible to save time, have the features of simplified structure and stability, and achieve the same effects as those described above.

Reference will be made to FIG. 7 . In order to achieve the above object, the linear transmission device according to the third embodiment of the present invention also has an elongated shaft 20 , a moving module 30 , a return assembly 40 , a rolling unit 50 , two thermally conductive parts. a member 60 , a thermal energy sensing unit 70 , and an oil scraper 80 . Since the configuration and effects of the third embodiment are the same as those of the first embodiment, they will not be described again. The difference is as follows.

The return assembly 40 includes a cover plate 42 abutting against the mounting surface 31 of the body 301 , and a plurality of pipes 43 inserted into each return hole 32 and respectively connected to the cover plate 42 . ) is included. A plurality of thermally conductive members 60 are respectively fixed on the inner surface 431 of each pipe 43, which can also achieve the same effect as described above.

Reference will be made to FIG. 8 . In order to achieve the above object, the linear transmission device according to the fourth embodiment of the present invention also has an elongated shaft 20 , a moving module 30 , a return assembly 40 , a rolling unit 50 , two thermally conductive parts. a member 60 , a thermal energy sensing unit 70 , and an oil scraper 80 . Since the configuration and effects of the fourth embodiment are the same as those of the first embodiment, they will not be described again. The difference is as follows.

The return assembly 40 is disposed on the mounting surface 31 of the body 301 , the end cover 41 disposed on the mounting surface 31 of the body 301 and the end cover 41 and the mounting surface ( 31) and a cover plate 42 disposed therebetween. Each thermally conductive member 60 is cylindrical and is inserted into a respective return portion 411 of the end cover 41 . Each return portion 411 has a return surface 4111 connected to the contact surface 611 of each thermally conductive member 60 , which can also achieve the same effect as described above.

Reference will be made to FIG. 9 . In order to achieve the above object, the linear transmission device according to the fifth embodiment of the present invention also has an elongated shaft 20 , a moving module 30 , a return assembly 40 , a rolling unit 50 , two thermally conductive parts. a member 60 , a thermal energy sensing unit 70 , and an oil scraper 80 . Since the configuration and effects of the fifth embodiment are the same as those of the first embodiment, they will not be described again. The difference is as follows.

The return assembly 40 includes an end cover 41 disposed on the mounting surface 31 of the body 301 and a cover plate 42 disposed between the end cover 41 and the mounting surface 31 . The end cover 41 is provided with a plurality of first return channels T1 , and the cover plate 42 has a plurality of second return channels T2 corresponding to the plurality of first return channels T1 , and a plurality of A half return portion 422 is provided. A plurality of thermally conductive members 60 are respectively secured to respective half return portions 422 , and each half return portion 422 has a half return in contact with the contact surface 611 of each thermally conductive member 60 . A surface 4221 is provided, which can also achieve the same effect as described above.

In addition, the above embodiments are described using a linear guideway as an example, and referring to FIG. 10 , the linear transmission device of this embodiment can also be applied to a ball screw, the elongate shaft 20 is a screw, and a moving module 30 is a nut, and return assembly 40 is an external return pipe 44 extending through mounting surface 31 of body 301 . Unlike the first embodiment, the mounting surface 31 of this embodiment is located on the radial side of the moving module 30, in this embodiment there is only one thermally conductive member 60, and the thermally conductive member 60 is fixed to the outer return pipe 44, which can also achieve the same effect as described above.

11 and 12, this embodiment is an internal circulation ball screw. In an internal circulation ball screw, the return assembly 40 is disposed inside the nut to allow the rolling unit 50 to cycle within the nut. Each thermally conductive member 60 is also cylindrical and is inserted into a respective return portion 411 of the end cover 41 . Each return portion 411 has a return surface 4111 connected to the contact surface 611 of the respective thermally conductive member 60 . The internal circulation ball screw is more suitable for use under the condition of short lead and small nut compared to the external circulation ball screw described above.

13 and 14 , the return assembly 40 of this embodiment is an end plug. The ball screw achieves a high-precision linear transmission effect by a rolling unit that rolls between the screw and the nut. To allow the rolling unit to roll and cycle endlessly, the ball screw structurally matches the circulation path of the rolling unit by providing an end plug in the nut as a return assembly 40 . The end plug is a combination of two components, including a first return member 45 and a second return member 46 assembled with the first return member 45 . Each thermally conductive member 60 is cylindrical and is inserted into the first return member 45 of each end plug.

15 and 16, this embodiment is an end cap ball screw. End cap ball screws are characterized by a high lead, long distance for the nut to travel, and multiple threads to increase rod capacity. Therefore, it is often used in the transportation and high-transport industries. The return assembly 40 is an end cap, and the two end caps are integrally formed and disposed respectively at the two ends of the moving module 30 , which is similar to the fourth embodiment shown in FIG. 8 . Each thermally conductive member 60 is also inserted into a respective return portion 411 of the return assembly 40 , and each return portion 411 communicates with the contact surface 611 of each thermally conductive member 60 . It has a contacting return surface 4111 .

While various embodiments in accordance with the present invention have been shown and described, it will be apparent to those skilled in the art that there may be additional embodiments within the scope of the present invention.

Claims (3)

It is a linear transmission device:
an elongate shaft 20 extending along the axial direction X and having a rolling groove 21;
A moving module 30 that is sleeve-coupled on the elongate shaft 20 and reciprocates along the axial direction (X), wherein the moving module 30 passes through the main body 301 and the main body 301 . a plurality of return holes (32), and a rolling groove (33) formed in the main body (301) and corresponding to the rolling groove (21), wherein the rolling groove (33) of the moving module (30) and the The rolling groove 21 of the elongate shaft 20 forms a rod path P1, a moving module 30;
A return assembly disposed on the body 301 and in communication with the load path P1 and comprising a return portion 411 and at least one first return channel T1 formed by the return portion 411 . a return assembly (40) as (40), wherein the at least one first return channel (T1), the plurality of return holes (32), and the rod path (P1) form an endless circulation path (P2);
a rolling unit 50 disposed in the endless circulation path P2 in a rolling manner;
at least one thermally conductive member (60) disposed in the endless circulation path (P2); and
A thermal energy sensing unit 70 connected to the at least one thermally conductive member 60 to detect the temperature of the at least one thermally conductive member 60 and generate a sensing signal
Including, a linear transmission device. The end cover (41) according to claim 1, wherein the linear transmission device is a linear guideway, and the return assembly (40) is disposed on a mounting surface (31) of the body (301), and the end cover (41) ) and a cover plate (42) disposed between the mounting surface (31), wherein the end cover (41) is provided with a plurality of the first return channels (T1), and the cover plate (42) includes the A plurality of second return channels (T2) corresponding to the plurality of first return channels (T1) are provided, the amount of the thermally conductive member (60) is two, and the two thermally conductive members (60) are the end covers Removably or non-removably disposed within the plurality of first return channels (T1) of (41), each of the two thermally conductive members (60) has a contact surface (611) and two return grooves (61) ), wherein the contact surface 611 is provided for the rolling unit 50 to contact and transfer the thermal energy of the rolling unit 50, and the two return grooves 61 have the contact surface ( 611 ) is provided and each connected to the second return channel T2 , the thermal energy sensing unit 70 is electrically connected to the thermally conductive member 60 and on one side of the end cover 41 . Deployed, a linear transmission device. 2. The device of claim 1, wherein the linear transmission device is a ball screw, the return assembly (40) is an external return pipe (44) passing through the mounting surface (31) of the body (301), and the at least one thermally conductive The amount of the member (60) is one, and the thermally conductive member (60) is fixed to the outer return pipe (44).

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