CN113007301A

CN113007301A - Linear transmission device

Info

Publication number: CN113007301A
Application number: CN201911325911.0A
Authority: CN
Inventors: 林孟颖; 蔡尚桦; 郑吉伦
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-06-22
Anticipated expiration: 2039-12-20
Also published as: CN113007301B

Abstract

The invention provides a linear transmission device, which is suitable for mounting at least one electronic element and comprises: a long shaft member; a movable body provided on the long shaft member and having an end surface; and the shell unit is arranged on the end face and provided with a base piece, at least one accommodating piece and an outer shell piece, the base piece is arranged on the long shaft piece and provided with an assembling face and a plurality of assembling parts, the at least one accommodating piece is arranged on the base piece, the accommodating piece is provided with a first clamping face, a second clamping face and an accommodating groove for the electronic element to be installed, the first clamping face is provided with a plurality of connecting parts mutually assembled with the assembling parts, the second clamping face is convexly provided with a plurality of clamping grooves, and the outer shell piece is sleeved on the at least one accommodating piece and provided with a plurality of clamping convex parts clamped and positioned with the clamping grooves.

Description

Linear transmission device

Technical Field

The present invention relates to linear actuators, and more particularly to a linear actuator having a modular housing unit.

Background

As shown in fig. 1, taiwan patent (I648488) is related to a ball screw structure with a detection function, which includes a screw shaft 10 having an external thread groove 101; a nut member 11 displaceably fitted around the screw shaft 10 along an axial direction of the screw shaft 10, the nut member 11 having an internal thread groove (not shown) provided corresponding to the external thread groove 101 of the screw shaft 10 such that a load path is formed between the internal thread groove of the nut member 11 and the external thread groove 101 of the screw shaft 10; a ball assembly 12 rollably disposed within the load channel; and a return cover 13 directly provided on the nut member 11, the return cover 13 being provided with a microcontroller 14 and a sensor 15 and sensing a rotation state of the screw shaft 10 in the nut member 11.

However, the microcontroller 14 is not only vulnerable to damage during the assembly and disassembly process, but also is complicated, which may cause trouble in maintenance and inspection or replacing parts.

In addition, the reflow cover 13 of the ball screw structure with the detection function is produced by an integrated process, so that the final product is limited too much, the detection items (such as speed, vibration, and temperature detection functions) cannot be adjusted in a modularized manner according to the requirements of the ball screw, and the number of the microcontrollers 14 cannot be changed or increased according to the actual requirements. Therefore, how to solve the above problems and deficiencies of the prior art is the direction of the present invention to be improved.

Disclosure of Invention

The present invention is directed to a linear actuator, wherein the accommodating member of the housing unit has a modular design, and can be disassembled and assembled by simple operation, so that the electronic components can be adjusted according to the requirements of the customers, thereby meeting the requirements of more applications.

To achieve the above object, the present invention provides a linear actuator adapted to mount at least one electronic component, comprising:

a long shaft member extending in the axial direction;

a movable body which is provided on the long shaft member so as to be capable of reciprocating displacement in the axial direction and has an end surface located at one end; and

the shell unit is provided with a base piece and at least one accommodating piece, the base piece is arranged on the end face of the moving body and sleeved with the long shaft piece, and is provided with an assembling face and a plurality of assembling parts arranged on the assembling face, the at least one accommodating piece is arranged on the base piece, the accommodating piece is provided with a first clamping face facing the assembling face, a second clamping face opposite to the first clamping face and an accommodating groove located between the first clamping face and the second clamping face and used for accommodating the electronic element, and the first clamping face is provided with a plurality of connecting parts mutually assembled with the assembling parts.

Preferably, the second engaging surface of the accommodating member is provided with a plurality of engaging grooves, the housing unit further has a housing member sleeved on the at least one accommodating member, the housing member has a covering surface covering the base member and the at least one accommodating member, and a plurality of engaging protrusions protruding from the covering surface and engaging with the plurality of engaging grooves.

Preferably, the linear transmission device is a ball screw, one of the accommodating members has a curvature center, the curvature center and two ends of the accommodating member are connected to form an included angle, and the included angle is greater than 180 degrees.

Preferably, the linear transmission device is a ball screw, an end surface of the moving body penetrates through a first opening, the accommodating member penetrates through a second opening corresponding to the first opening, the area of the second opening is larger than that of the first opening, and the first opening is communicated with the second opening.

Preferably, the linear transmission device is a ball screw, the number of the accommodating pieces is two or more, each accommodating piece has a first joint end and a second joint end opposite to the first joint end, and the first joint end and the second joint end of each accommodating piece can be respectively and convexly engaged or magnetically connected to the first joint end and the second joint end of the adjacent accommodating piece.

Preferably, a plurality of first electrode points are disposed on the first joint end of each accommodating member, a plurality of second electrode points are disposed on the second joint end, and the plurality of first electrode points of the first joint end of each accommodating member electrically connect the plurality of second electrode points of the second joint end of the adjacent accommodating member.

Preferably, wherein the linear transmission is a ball screw, the base member is a wiper, the long shaft member has an externally threaded groove, and the base member has an internally threaded groove corresponding to the externally threaded groove.

Preferably, the linear transmission device is a linear slide rail, the housing unit has two receiving members, one receiving member has a third joint end portion, and the other receiving member has a fourth joint end capable of being engaged with or magnetically connected to the third joint end portion in a concave-convex manner.

Preferably, the third joint end is provided with a plurality of third electrode points, and the fourth joint end is provided with a plurality of fourth electrode points electrically connected with the plurality of third electrode points respectively.

Preferably, another of the housing units may be disposed at another end surface of the moving body.

Therefore, the invention provides a linear transmission device, which is mainly characterized in that the accommodating piece of the shell unit adopts a modularized design, can change the shape according to different requirements of customers, is arranged and combined into different appearances, enables electronic elements arranged in the shell unit to be adjusted in various ways according to the requirements of the customers, is favorable for replacing or increasing the electronic elements, and enables the customers to use the linear transmission device more flexibly.

Drawings

Fig. 1 is a diagram of a linear slide rail according to taiwan patent I648488.

Fig. 2 is a perspective assembly view of the first embodiment of the present invention, showing the linear actuator as a ball screw.

Fig. 3 is an exploded perspective view of the first embodiment of the present invention.

Fig. 4 is a combination view (one) of the housing unit of the first embodiment of the present invention.

Fig. 5 is a combination view (two) of the housing unit of the first embodiment of the present invention.

Fig. 6 is a combination view (iii) of the housing unit of the first embodiment of the present invention.

Fig. 7 is a perspective view from another perspective of the first embodiment of the present invention.

Fig. 8 is a perspective view of a container according to a second embodiment of the present invention.

Fig. 9 is a perspective view of a third embodiment of the invention showing adjacent receptacles magnetically coupled.

Fig. 10 is an exploded perspective view of the fourth embodiment of the present invention, showing that the linear transmission device is a linear slide rail and the first receiving member is engaged with the second receiving member.

Fig. 11 is an exploded perspective view of the fifth embodiment of the present invention, showing that the linear actuator is a linear slide rail and the first receiving member is magnetically connected to the second receiving member.

Description of the symbols in the drawings:

the prior art is as follows:

external thread groove 101 of screw shaft 10

Nut member 11 ball assembly 12

The return cover plate 13 microcontroller 14

Sensor 15

The invention comprises the following steps:

angle theta between center of curvature P and angle of inclination

Long shaft 30 of electronic component 20

Axial 31 screw ring surface 32

Male thread groove 33 moving body 40

End face 411 of pipe body 41

First opening 412 external convex ring 42

Base member 51 of case unit 50

Positioning ring portion 511 mounting tube portion 512

Assembly surface 513 assembly part 514

First neck zone 5141 first body zone 5142

Female threaded channel 515 receptacle 52

First clamping surface 521 and second clamping surface 522

The supporting wall 523 receiving slot 524

Groove bottom 5241 connecting part 525

Second neck region 5261 of locking groove 526

Second body region 5262 second opening 527

First coupling end 528 first magnetic attraction end surface 5281

First fixing groove 5282 first electrode point 5283

Second coupling end 529 second magnetically attractive end surface 5291

Second fixing groove 5292 second electrode point 5293

Outer housing member 53 surrounds wall 531

Radially inner side 5321 of connecting wall 532

Cover surface 533 engaging projection 534

Third joint end 541 of

container

54, 55

Third electrode point 5411

accommodating grooves

5412 and 5512

Fourth junction terminal 551 fourth electrode point 5511

End cap 70 of transmission unit 60

First magnetic member 80 and second magnetic member 90

Third magnetic part 100 fourth magnetic part 110

Detailed Description

The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

A preferred embodiment of the linear actuator of the present invention is shown in fig. 2 to 7, which is a ball screw for example, but not limited thereto, or a linear slide rail of fig. 10, wherein the linear actuator is suitable for mounting a plurality of electronic components 20, and comprises:

a long shaft member 30 extending in an axial direction 31; in the present embodiment, the long shaft 30 is a screw, and has a screw ring surface 32 and a spiral external thread groove 33 recessed in the screw ring surface 32.

A moving body 40 which is sleeved outside the long shaft member 30 in a reciprocating displacement manner along the axial direction 31 and can perform linear motion relative to the long shaft member 20; in the present embodiment, the moving body 40 is a nut, and includes a tube 41, an outer collar 42 (referred to as a flange in the industry) connected to the tube 41, and an inner rolling groove (not shown) provided on an inner diameter surface of the tube 31 and corresponding to the outer thread groove 33 of the long shaft 30, the outer thread groove 33 and the inner rolling groove form a load path for rolling a rolling unit (not shown), and the tube 41 has an end surface 411, and the end surface 411 penetrates through the first opening 412.

Since the assembly method of the long shaft 30 and the moving body 40 is the prior art, and the operation method thereof is the same as the prior art, it is not the creation focus of the present application, and thus the detailed structure, assembly method and operation method of the components (the long shaft 30 and the moving body 40) will not be described in detail.

A housing unit 50 disposed on the end surface 411, and having a base 51, a plurality of receiving parts 52, and an outer housing 53, wherein the base 51 is disposed on the end surface 411 of the moving body 40 and sleeved on the long shaft 30, and has a positioning ring portion 511 abutting against the end surface 411 of the moving body 40, and a mounting pipe portion 512 connecting the positioning ring portion 511 and providing for the plurality of receiving parts 52, a radial outer side of the mounting pipe portion 512 has an annular assembling surface 513 and a plurality of assembling portions 514 recessed in the assembling surface 513, the plurality of assembling portions 514 are groove-shaped in the embodiment, and the plurality of receiving parts 52 are disposed on the assembling surface 513 of the mounting pipe portion 512; in this embodiment, each receiving member 52 is an arc-shaped member so as to be fittingly mounted on the annular mounting surface 513 of the mounting tube 512, each receiving member 52 has a first locking surface 521 facing the mounting surface 513, a second locking surface 522 opposite to the first locking surface 521, a bearing wall 523 connecting the first locking surface 521 and the second locking surface 522, and a receiving groove 524 located between the first locking surface 521, the second locking surface 522, and the bearing wall 523 and used for mounting the electronic component 20, the first locking surface 521 is provided with a plurality of connecting portions 525 mutually connected with the plurality of mounting portions 514, the plurality of connecting portions 525 are convex portions, the second locking surface 522 is provided with a plurality of locking grooves 526 thereon, the housing member 53 is fitted over the plurality of receiving members 52 along the axial direction 31, the housing member 53 has a ring wall 531 and a connecting wall 532 extending axially from the outer edge of the ring wall 531, the end surface 411 of the ring wall facing the moving body 40 and the radial inner surface 5321 of the connecting wall 532 together form a covering surface 533, the cover surface 533 covers the base 51 and the accommodating members 52, and the radial inner side surface 5321 is provided with a plurality of engaging protrusions 534 capable of being engaged and positioned with the engaging grooves 526; in the present embodiment, the base 51 is a wiper and has an internal thread groove 515 corresponding to the external thread groove 33, the base 51 not only can be used as a bridge bridging between the plurality of accommodating members 52 and the moving body 40, but also can scrape off foreign matters on the long shaft 30 to achieve the effect of dust prevention, but not limited thereto, in other embodiments, the base 51 may be only a general annular structure and bridge between the plurality of accommodating members 52 and the moving body 40; the base 51 is fixed to the end surface 411 of the tube 41 by a locking member (not shown) in the preferred embodiment, but not limited thereto in other embodiments, and any fixing means for fixing the base 51 to the end surface 411 of the tube 41 should be included in the present invention. In addition, in the embodiment, the housing unit 50 is disposed on the end surface 411 of the tube 41, but not limited thereto, and in other embodiments, another housing unit 50 may be disposed on the end surface of the outer protruding ring 42 of the moving body 40.

As shown in fig. 4, the plurality of receiving members 52 are illustrated as three, but not limited thereto, and may be two receiving members 52 (as shown in fig. 5) or four receiving members 52 (as shown in fig. 6); therefore, compared to the prior art that adopts an integrally formed design, the accommodating parts 52 of the present invention have a modular design, and different electronic components 20 can be respectively disposed in the accommodating parts 52 according to the requirement, in this embodiment, the electronic components 20 are sensors, for example: the accelerometer, the strain gauge, the metal sensor, and the force sensor are used to measure various data of the moving body 40, but not limited thereto, in other embodiments, the electronic Component 20 may be other types of Active/Passive components (Active/Passive components), such as: and an arithmetic Unit (Processing Unit) which can be connected to the sensor disposed in the moving body 40, calculates the data measured by the sensor, and transmits the calculated electronic signal to the outside, and in summary, the electronic signal can be disassembled and assembled by simple operation, so that the multiple accommodating members 52 can be adjusted according to the requirements of customers to meet more different application requirements.

As shown in fig. 4 to 6, in the present embodiment, each accommodating element 52 has a first engaging end 528 and a second engaging end 529 opposite to the first engaging end 528, and the first engaging end 528 and the second engaging end 529 of each accommodating element 52 can be engaged with the first engaging end 528 and the second engaging end 529 of the adjacent accommodating element 52 in a concave-convex manner; therefore, the effect of combining stability and positioning is achieved, but not limited thereto, as shown in fig. 9, in other embodiments, the first engaging end 528 and the second engaging end 529 of each receiving member 52 can be magnetically connected to the first engaging end 528 and the second engaging end 529 of the adjacent receiving member 52, respectively, so as to form an effect of easy assembly and disassembly, wherein the first engaging end 528 of each receiving member 52 has a first magnetic attraction end 5281, and a first fixing groove 5282 connecting the first magnetic attraction end 5281 and the receiving groove 524 and allowing the first magnetic member 80 to be disposed thereon, the second engaging end 529 of the receiving member 52 has a second magnetic attraction end 5291, and a second fixing groove 5292 connecting the second magnetic attraction end 5291 and the receiving groove 524 and allowing the second magnetic member 90 to be disposed thereon, and the first magnetic member 80 and the second magnetic member 90 are magnets.

As shown in fig. 4, the number of the accommodating parts 52 is three, wherein one of the accommodating parts 52 has a curvature center P, the curvature center P is connected with two ends of the accommodating part 52 to form an included angle θ, and the included angle θ is larger than 180 degrees, so as to improve the robustness of the whole structure; in the present embodiment, the accommodating part 52 and the other accommodating parts 52 form a 360-degree closed ring structure together, but the present embodiment is not limited thereto, and in other embodiments, the plurality of accommodating parts 52 do not necessarily form a 360-degree closed ring structure, and may also have an opening (as shown in fig. 6).

As shown in fig. 4, the present invention further includes a transmission unit 60 disposed in the accommodating groove 524 of the accommodating part 52 and electrically connected to the electronic component 20; therefore, the purpose of signal transmission is achieved, wherein the signal transmission is performed by wireless transmission, but not limited to wireless transmission, or wired transmission, and LoRa is used for signal transmission in the embodiment, so that the wireless communication system has the advantages of long-distance transmission, low power consumption and low cost, but not limited to wireless transmission, and Wi-Fi, Li-Fi, bluetooth, ZigBee, 4G, 5G and other wireless communication technologies can be used for communication transmission.

Each connecting portion 514 has a first neck region 5141 against which each connecting portion 525 abuts, and a first body region 5142 connected to and perpendicular to the first neck region 5141. When the base member 51 and the plurality of receiving members 52 are assembled, the connecting portion 525 on each receiving member 52 passes through the first body region 5142 of the assembly portion 514, and then the receiving member 52 is rotated (clockwise rotation in this embodiment) so that the connecting portion 525 on the receiving member 52 can be positioned at the periphery of the first neck region 5141; each locking groove 526 has a second neck region 5261 against which each locking protrusion 534 abuts, and a second body region 5262 connected to and perpendicular to the second neck region 5261. When the plurality of receiving members 52 and the housing member 53 are assembled, the engaging protrusion 534 of the housing member 53 is first passed through the second body region 5262 of the locking groove 526, and then the housing member 53 is rotated (in the same direction as the receiving members 52) to position the engaging protrusion 534 of the housing member 53 at the periphery of the second neck region 5261; therefore, the effect of stable assembly is achieved.

As shown in fig. 7, one receiving member 52 penetrates through the second opening 527 corresponding to the first opening 412, the area of the second opening 527 is larger than that of the first opening 412, and the first opening 412 is communicated with the second opening 527; therefore, the wires can pass through the first opening 412 and the second opening 527 from the inside of the moving body 40, and the purpose of connecting the electronic component 20 is achieved.

As shown in fig. 8 to 9, the first bonding end 528 is provided with a plurality of first electrode points 5283, and the second bonding end 529 is provided with a plurality of second electrode points 5293, wherein the number of the first electrode points 5283 is four, which are GND, VCC, SDA, and SCL, respectively, and the number of the second electrode points 5293 is also four, which are GND, VCC, SDA, and SCL, respectively; therefore, the first engaging end 528 and the second engaging end 529 of each accommodating element 52 can be electrically connected to the first engaging end 528 and the second engaging end 529 of the adjacent accommodating element 52, so as to reduce the wiring, and when one accommodating element 52 is disassembled, the normal operation of other electronic components 20 is not affected.

In addition, the above embodiment is described with a ball screw, and as shown in fig. 10, the linear transmission device of the present embodiment may also be applied to a linear slide rail, such that the long shaft 30 is a slide rail, the moving body 40 is a slider, the base member 51 is disposed on the end cap 70 of the linear slide rail, in the present embodiment, the housing unit 50 has two receiving members 54, 55, one receiving member 54 has a third joint end 541, the other receiving member 55 has a fourth joint end 551 capable of being engaged with the third joint end 541 in a concave-convex manner, the third joint end 541 is provided with a plurality of third electrode points 5411, the fourth joint end 551 is provided with a plurality of fourth electrode points 5511 capable of being electrically conducted with the plurality of third electrode points 5411, but not limited thereto, as shown in fig. 11, in other embodiments, the third magnetic member 100 is fixedly disposed in the receiving groove 5412 of the third joint end 541, the fourth magnetic member 110 is fixedly disposed in the receiving groove 5512 of the fourth joint end 551, the third magnetic member 100 and the fourth magnetic member 110 are configured to magnetically connect the third connection end 541 and the fourth connection end 551, and the functions and applications thereof are the same as those of the ball screw.

The above is a configuration description of each main component of the embodiment of the present invention. The efficacy of the present invention is explained below.

Therefore, the present invention provides a linear transmission device, which is mainly characterized in that the accommodating part 52 of the housing unit 50 adopts a modularized design, and can be changed in shape according to different requirements of customers, and be arranged and combined into different appearances, so that the electronic component 20 installed in the housing unit 50 can be adjusted in various ways according to the requirements of the customers, thereby facilitating the replacement or addition of the electronic component 20, and enabling the customers to use the linear transmission device of the present invention more flexibly.

In summary, the above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A linear actuator adapted for use in mounting at least one electronic component, comprising:

a long shaft member extending in the axial direction;

2. The linear actuator according to claim 1, wherein the second engaging surface of the receiving member has a plurality of engaging grooves, the housing unit further has a housing member fitted over the at least one receiving member, the housing member has a covering surface covering the base member and the at least one receiving member, and a plurality of engaging protrusions protruding from the covering surface and engaged with the plurality of engaging grooves.

3. The linear actuator of claim 1, wherein the linear actuator is a ball screw, and one of the receiving members has a center of curvature that is joined to the ends of the receiving member to form an angle that is greater than 180 degrees.

4. The linear actuator according to claim 1, wherein the linear actuator is a ball screw, the end surface of the moving body passes through a first opening, the receiving member passes through a second opening corresponding to the first opening, the area of the second opening is larger than that of the first opening, and the first opening communicates with the second opening.

5. The linear transmission device according to claim 1, wherein the linear transmission device is a ball screw, the number of the receiving members is two or more, each receiving member has a first engaging end portion and a second engaging end portion opposite to the first engaging end portion, and the first engaging end portion and the second engaging end portion of each receiving member can be engaged with or magnetically coupled to the first engaging end portion and the second engaging end portion of the adjacent receiving member in a concavo-convex manner.

6. The linear actuator according to claim 5, wherein the first engaging end of each receiving member has a plurality of first electrode points thereon, and the second engaging end has a plurality of second electrode points thereon, the plurality of first electrode points of the first engaging end of each receiving member electrically connecting the plurality of second electrode points of the second engaging end of the adjacent receiving member.

7. The linear drive of claim 1, wherein the linear drive is a ball screw, the base member is a wiper, the long shaft member has an externally threaded groove, and the base member has an internally threaded groove corresponding to the externally threaded groove.

8. The linear actuator of claim 1, wherein the linear actuator is a linear slide, the housing unit has two receiving members, one receiving member has a third engaging end, and the other receiving member has a fourth engaging end capable of engaging with the third engaging end in a concave-convex manner or magnetically connecting therewith.

9. The linear actuator according to claim 8, wherein a plurality of third electrode points are provided on the third joint end portion, and a plurality of fourth electrode points are provided on the fourth joint end portion, the fourth electrode points being electrically connected to the plurality of third electrode points, respectively.

10. A linear actuator according to claim 1, wherein another housing unit is provided at the other end surface of the movable body.