Linear motion mechanism

A linear motion mechanism includes a base, a driving module, a driven module, and a pulling member fixed to the base. The driven module includes a sliding plate slidably mounted on the base and connected to the driving module, a transmission assembly, and a moving stage. The sliding plate has a guide hole, and the moving stage is slidably mounted on the sliding plate and connected to the transmission assembly. An end of the pulling member is fixed to the base, and an other end of the pulling member extends through the guide hole and is connected to the transmission assembly. The sliding plate, when driven by the driving module, is configured for telescopic movement relative to the base, and the pulling member is configured to pull the moving stage along the guide hole by the transmission assembly.

FIELD

The subject matter herein generally relates a linear motion mechanism.

BACKGROUND

Linear motion mechanisms are widely used in machining and measuring field. A conventional linear motion mechanism includes a base, a driving member, a guide rail, and a movable plate slidably mounted on the base. The movable plate is used to carry a workpiece. The movable plate can move along the guide rail under the driving member drives.

DETAILED DESCRIPTION

The term “coupled” is defined as coupled, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently coupled or releastably coupled. The term “comprising” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.

The present disclosure is described in relation to a linear motion mechanism.

FIG. 1illustrates a linear motion mechanism100. The linear motion mechanism100can include a base10, a driving module20slidably mounted on the base10, a driven module30coupled to the driving module20, and a pulling member40. One end of the pulling member40can be mounted on the base10. The driven module30can move relative to the base10when driven by the driving module20.

FIG. 2illustrates that the base10can be substantially rectangular and include a bottom plate11, two side plates12vertically extending from two sides of the bottom plate11, a baffle plate13positioned at one end portion of the bottom plate11, and a pair of first guide rails14positioned on the bottom plate11. The first guide rails14can be respectively placed adjacent to the two side plates12and extend parallel to the side plates12. The base10can further include one or more sliding blocks141slidably mounted on each of the first guide rails14. The baffle plate13can be perpendicular to the bottom plate11and connected to the two side plates12. The baffle plate13can be used to limit the sliding block141. The pulling member40can be mounted at one end of the bottom plate11.

The driving module20can include a driving member21, a driving wheel22, a driven wheel23, a first belt24, and a first connecting member25. The driving member21can be mounted at one end portion of the bottom plate11away from the baffle plate13. In at least one embodiment, the driving member21can be, but not limited to, a motor. The driving wheel22can be connected to the driving member21, and the driving wheel22and the driven wheel23can be positioned at two opposite sides of the bottom plate11. The first belt24can be coupled to the driving wheel22and the driven wheel23, and the first belt24can be parallel to the first guide rails14. The first connecting member25can be positioned on the first belt24. When the driving wheel22rotates driven by the driving member21, the first connecting member25can move between the driving wheel22and the driven wheel23. The pulling member40can be positioned near the driven wheel23.

The driven module30can include a sliding plate31, a pair of second guide rails32positioned on the sliding plate31, a transmission assembly33, and a moving stage34positioned on the second guide rails32. The sliding plate31can be similar to the base10and positioned in the base10. The sliding plate31can be coupled to the sliding blocks141and the first connecting member25. The sliding plate31, when driven by the driving module20, is configured for telescopic movement relative to the base10. The sliding plate31can define a linear guide hole311between the two second guide rails32and parallel to the second guide rails32. The second guide rails32can be parallel to the first guide rails14and two sides of the sliding plate31.

The transmission assembly33can include two rotating wheels331positioned at two opposite sides of the sliding plate31, a second belt332coupled to the two rotating wheels331, and a second connecting member333. The two rotating wheels331can be pivotally connected to the sliding plate31and rotate relative to the sliding plate31. The two rotating wheels331can be positioned near the two ends of the guide hole311. The second belt332can be parallel to the second guide rails32. The second connecting member333can be mounted on the second belt332and connected to the moving stage34. The pulling member40can be fixedly connected to the second belt332, thereby the pulling member40can pull the second belt332when the sliding plate31moves. The second connecting member333can move along with the second belt332, and the moving stage34can move along the second guide rails32. In at least one embodiment, the pulling member40and the second connecting member333can be positioned at two sides of the second belt332. The pulling member40can be a clamping plate configured to clamp the second belt332.

FIG. 3illustrates the linear motion mechanism100in use state. The driving wheel22can be rotated when driven by the driving member21, and the first connecting member25can move with the first belt24. The sliding plate31can move away from the base10along the first guide rails14with the first connecting member25. At the same time, the pulling member40can pull the second belt332to move, and the second connecting member333can move with the second belt332, thereby the moving stage34can move away from the sliding plate31along the second guide rails32with the second connecting member333. Thus the moving stage34can move away from the base10. After that, the driving wheel22can rotate in reverse driven by the driving wheel22, and the moving stage34can move toward the base10.

In other embodiments, the driving module20can be a linear driving member connected to the sliding plate31, such as a cylinder or a guide screw.

In at least one embodiment, rotating shafts (not shown) of the driving wheel22and the driven wheel23can be parallel to the bottom plate11, and rotating shafts (not shown) of the rotating wheels331can be perpendicular to the sliding plate31. In other embodiments, the rotating shafts of the driving wheel22and the driven wheel23can be perpendicular to the bottom plate11, and the rotating shafts of the rotating wheels331can be parallel to the sliding plate31, as long as the sliding plate31can move along the first guide rails14, and the moving stage34can move along with the second belt332.

In other embodiments, the transmission assembly33can include at least one gear (not shown) and two racks (not shown). The two racks can be positioned at two sides of the gear and meshed with the gear. One rack can be connected to the pulling member40, and the other rack can be connected to the moving stage34.

The linear motion mechanism100can include the driving module20, the driven module30and the pulling member40. The sliding plate31can do telescopic movement driven by the driving module20, and the moving stage34can move with the transmission assembly33along the guide hole311, thereby the moving stage34can move relative to the base10and the sliding plate31. Therefore, the moment speed of the moving stage34is twice the sliding plate31.