KR20170003067U - Linear actuator - Google Patents

Abstract

The present invention relates to linear actuators. The linear actuator includes a track base; At least one track fixedly mounted on the track base; A sliding seat slidably mounted on the at least one orbit; At least one transmission shaft fixed to the at least one orbit; And one transmission shaft which is pivotally mounted on the at least one transmission shaft and connects the sliding sheets to drive the sliding sheets to move along the at least one orbit.

Description

Linear Actuator {LINEAR ACTUATOR}

The present invention relates to a sliding rail, and more particularly to a linear actuator.

Generally, the assembling positions of the motor base and the bearing seat of the linear actuator are mainly divided into two types, and are mounted on both ends of the platform and base, respectively. For example, disclosed in Taiwan Utility Model Patent Publication No. M464559 and Taiwan Utility Model Patent Publication No. M489721 One linear actuator belongs to these two.

Taiwan Utility Model Patent Publication No. M464559, the motor base and the bearing seat are directly mounted on the aluminum extrusion base platform and the base is separately machined to ensure the mounting accuracy and the nut seat and bearing seat are mounted on the plane Should be installed.

Refer to Taiwan Utility Model Patent Publication No. M489721, assemble the motor base and bearing seat on both ends of the base, and drill the end face so that the nut seat and bearing seat are fixedly connected to the base lock structure.

Both of the above methods cause problems that are inconvenient for the manufacturing cost and assembly, and the motor base and the bearing seat are directly mounted on the aluminum extrusion base platform, so that the aluminum extrusion base platform lacks rigidity, The motor base and the bearing seat are assembled on both ends of the base, so it is difficult to precisely position the motor base or adjust the horizontal height of the motor base and the bearing seat, Points exist.

Therefore, there is a need to provide a linear actuator having novelty and inventive capability to solve the above problem.

The main object of the present invention is to provide a linear actuator which has high precision and does not affect the accuracy even after long use.

In order to achieve the above object, the present invention provides a linear actuator, wherein the linear actuator comprises an orbital base; At least one track fixedly mounted on the track base; A sliding seat slidably installed on the at least one orbit; At least one transmission shaft fixed to the at least one orbit; And a transmission shaft pivotally installed on the at least one transmission shaft and connecting the sliding sheet to drive the sliding seat to move along the at least one orbit.

Figure 1 is a perspective view of one preferred embodiment of the present invention.
Figure 2 is an exploded view of one preferred embodiment of the present invention.
Figure 3 is a partially exploded view of one preferred embodiment of the present invention.
4 is a cross-sectional view of one preferred embodiment of the present invention.

It is intended that the following description of possible embodiments of the present invention only illustrate the present invention and that the present invention is not intended to limit the scope of protection.

1 to 4, this shows a preferred embodiment of the present invention wherein the linear actuator 1 of the present invention comprises a track base 2, at least one orbit 3, a sliding seat 4, One transmission shaft 5 and a transmission shaft 6. [

The at least one track (3) is fixed to the track base (2), and the track base (2) is made of an aluminum extrusion type material. The sliding seat (4) is slidably mounted on the at least one orbit (3). The at least one transmission shaft sheet (5) is fixed to the at least one orbit (3). The transmission shaft 6 is pivotally mounted on the at least one transmission shaft 5 and connects the sliding seat 4 so that the sliding seat 4 is moved along the at least one orbit 3 .

In the present embodiment, the transmission shaft 6 spirally passes through the screw of the sliding sheet 4. [ Wherein the number of the at least one orbit 3 is two and the two orbit 3 is extended horizontally and parallelly and each of the orbits 3 has a higher rigidity than the orbital base 2, (3). Each of the orbits 3 has a polishing surface 32 and the polishing surface 32 has a planar surface that is higher than the surface of the raceway base 2 so that the sliding sheet 4 has high precision Move. Preferably, the surface roughness Ra of the abrasive surface 32 of the orbit 3 is less than 0.4 占 퐉, wherein Ra is the center line average roughness, and the center line of the entire length of the abrasive surface 32 is away from the contour Is the arithmetic mean of the deviation values of the distance. Ra = (| Y1 | + | Y2 | + ..... + | Yn |) / n.

The sliding seat 4 further includes a sliding table 41, a connecting hole 42 and at least one sliding block 43. The sliding table 41 is connected to the connecting hole 42, The sliding block 43 is fixed to the lower portion of the sliding table 41 (refer to FIG. 2 and FIG. 3) Respectively. Wherein said at least one transmission shaft sheet (5) is mounted on said polishing surface (32) and includes a bearing seat (51) and a motor base (54), said transmission shaft (6) The motor base 54 is pivotally mounted on a motor base 54. The bearing seat 51 includes a bearing 52 pivotally connected to the transmission shaft 6, The motor 56 and the sliding sheet 4 are supported by the motor base 54 so as to be pivotally mounted between the motor 56 and the sliding sheet 4 6) can be installed.

In the present embodiment, each of the orbits 3 is provided so as to pass through a plurality of through holes 31. Preferably, the through holes 31 are formed as sunk holes, The bearing seat 51 and / or the motor base 54 are fixed to the surface of the raceway base 2 which does not protrude from the raceway 3 so as not to affect the movement of the sliding seat 4, Is provided with at least one insertion convex portion that can be inserted into the at least one buried hole on the bottom surface, thereby assisting stable positioning. Each of the support shafts 5 is provided with a plurality of perforations 57 through which the two support arms 53 are opposed to each other on the other side of the bearing seat 51, Two perforations 57 are provided on the other side of the motor base 54 and two supporting walls 55 are provided on the other side of the motor base 54. At least one of the perforations 57 is installed in each of the supporting walls 55 (See FIGS. 2 and 3), each of the perforations 57 corresponds to the through hole 31 and is inserted through the fixing hole 58 so as to penetrate each of the raceway 3, the bearing seat 51, And the motor base (54) are fixed to the track base (2). Preferably, the bearing seat 51 and the motor base 54 are brought into contact with the raceway base 2, respectively, so that the robustness is improved and the precision is maintained. Both the bearing seat 51 and the motor base 54 are fixed to the two trajectories 3 and the track base 2 to secure the parallelism of the transmission shaft 6, .

In the present embodiment, the linear actuator 1 further includes an upper cover 7 and at least one side cover 8. The upper cover 7 and each of the side covers 8 are connected to each other by the traverse base 2, the trajectory 3, a part of the sliding sheet 4, the transmission shaft 5 and the transmission shaft 6, So as to prevent foreign matter from interfering with the operation of the linear actuator (1).

In other embodiments, the number of at least one orbit may be different, for example using four orbits may be better able to share the load and reduce the likelihood that the orbit and orbital base will deform into an overload; The sliding sheet may be an integrally molded structure; Wherein one of the bearing seat and the motor base is selected and fixed on the track so that only the bearing seat or the motor base which is not fixedly installed on the track is adjusted when the horizontal axis of the transmission shaft is adjusted; Wherein the upper cover and the at least one side cover are selectively integrally molded or the at least one side cover and the orbital base are integrally formed; The linear actuator may lead to movement of the sliding seat, for example, as a driving mechanism such as a link or a belt. However, the present invention is not limited thereto, and at least one of the transmission shafts may be fixed to the at least one orbit. At both ends of the transmission shaft, a fixing member such as a C-type locking member may be provided to restrict the position of the transmission shaft, but the present invention is not limited thereto.

As described above, the trajectory of the linear actuator is fixed to at least one of the motor base and the bearing seat to secure the accuracy of the linear actuator, and the trajectory base is separately processed to fix the fixed ball of the transmission shaft sheet The manufacturing cost is low.

1: linear actuator 2: orbital base 3: orbital
31: Through hole 32: Polishing surface 4: Sliding sheet
41: sliding table 42: connector 43: sliding block
5: electric transmission shaft 51: bearing seat 52: bearing
53: support arm 54: motor base 55: support wall
56: Motor 57: Perforation 58: Fixture
6: transmission shaft 7: upper cover 8: side cover

Claims (10)

Track base;
At least one track fixedly mounted on the track base;
A sliding seat slidably installed on the at least one orbit;
At least one transmission shaft fixed to the at least one orbit;
And a transmission shaft that is pivotally mounted on the at least one transmission shaft sheet and connects the sliding sheet to drive the sliding seat to move along the at least one orbit. The linear actuator of claim 1, wherein the at least one transmission shaft seat includes a bearing seat, the bearing seat including a bearing pivotally connected to a transmission shaft. The linear actuator according to claim 1, wherein the at least one transmission shaft sheet includes a motor base, a transmission shaft is pivotally installed on the motor base, and the motor base is assembled to drive the motor of the transmission shaft. 4. The linear actuator of claim 3, wherein the at least one transmission shaft further comprises a bearing seat, the bearing seat including a bearing pivotally connected to the transmission shaft. The linear actuator according to claim 1, wherein the electric shafts pass through a screw of the sliding sheet. 2. The linear actuator of claim 1, wherein each of the orbits has a stiffness greater than the orbital base. The linear actuator according to claim 1, wherein each of the orbits has a polishing surface, the polishing surface has a higher planarity than the surface of the raceway base, and the at least one transmission shaft sheet is installed on the polishing surface. The linear actuator according to claim 1, wherein the number of the at least one orbit is two, and the two orbits are extended horizontally and in parallel. The motorcycle according to claim 1, wherein at least one through hole is provided through each of the orbits, and at least one through hole is formed through each of the respective axle shafts, each of the through holes corresponding to the through hole, And fixes the orbital and the transmission shaft sheet to the track base. 5. The apparatus according to claim 4, wherein the electric shafts spiral through the screw of the sliding sheet, the number of at least one orbit is two, the two orbitals extend horizontally and parallelly, and each orbit is higher than the orbit base Wherein each of the orbits is provided with a polishing surface, the polishing surface has a planar surface higher than the surface of the raceway base, at least one rolling axis is provided on the polishing surface, A plurality of through holes are formed through each of the transmission shafts, two support arms are opposed to each other on the other side of the bearing seat, at least one perforation is provided in each of the support arms, On the other side, two support walls are opposed to each other, and at least one perforation is provided in each support wall, and each perforation corresponds to a through hole That is installed by the fastener through each track, and bearing seat base motor is a linear actuator that is fixed to the track base, the bearing seat and the motor base are each abutment on the track base.

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