Linear motion platform

Abstract

The present invention discloses a linear motion platform, comprising: a base; a first motion seat that cooperates with the base for guiding, and the first motion seat can reciprocate along the first axis direction relative to the base; a second motion seat that is arranged above the first motion seat, the second motion seat that cooperates with the first motion seat for guiding, and the second motion seat can reciprocate along the second axis direction relative to the first motion seat, and the second axis direction is arranged at an angle with the first axis direction; a first guide member and a second guide member that cooperate with each other for guiding, the first guide member is fixed on the second motion seat, and the second guide member is arranged along the first axis direction; a first mover is connected to the first motion seat, and the first mover can reciprocate along the first axis direction; a second mover is connected to the second guide member, and the second mover can reciprocate along the second axis direction. In the linear motion platform of the present invention, the mover of the first drive mechanism and the mover of the second drive mechanism can not interfere with each other, and the control accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of drive devices, and in particular to a linear motion platform. Background Art

[0002] As the requirements for machining accuracy in the machining process continue to increase, the requirements for the control accuracy of the motion platform are also constantly increasing.

[0003] In a traditional linear motion platform, when the mover of the first drive mechanism moves along the first axis, the mover of the second drive mechanism will also move along the first axis, causing the load of the first drive mechanism to increase and affecting the control accuracy. Summary of the invention

[0004] Based on this, it is necessary to provide a linear motion platform, in which the mover of the first driving mechanism and the mover of the second driving mechanism can not interfere with each other and have high control accuracy.

[0005] The technical solution is as follows:

[0006] A linear motion platform comprises: a base; a first moving seat, the first moving seat is guided and matched with the base, and the first moving seat can reciprocate relative to the base along a first axis direction; a second moving seat, the second moving seat is arranged above the first moving seat, the second moving seat is guided and matched with the first moving seat, and the second moving seat can reciprocate relative to the first moving seat along a second axis direction, and the second axis direction is arranged at an angle to the first axis direction; a connecting assembly, the connecting assembly comprises a first guide member and a second guide member that are guided and matched with each other, the first guide member is fixed on the second moving seat, and the second guide member is arranged along the first axis direction; a first driving mechanism, the first driving mechanism comprises a first mover, the first mover is connected to the first moving seat, and the first mover can reciprocate along the first axis direction; and a second driving mechanism, the second driving mechanism comprises a second mover, the second mover is connected to the second guide member, and the second mover can reciprocate along the second axis direction.

[0007] When the above-mentioned linear motion platform is in use, the first driving mechanism drives the first mover to reciprocate along the first axis direction, thereby driving the first moving seat to reciprocate along the first axis direction relative to the base, and then driving the second moving seat to reciprocate along the first axis direction; since the first guide member is fixed on the second moving seat and the first guide member and the second guide member are guided and cooperated, when the second moving seat reciprocates along the first axis direction, it only drives the first guide member to reciprocate along the trajectory of the second guide member, and the second mover of the second driving mechanism will not reciprocate along the first axis direction; only when the second driving mechanism drives the second mover to reciprocate along the second axis direction, will it drive the second moving seat to reciprocate along the second axis direction relative to the first moving seat. In the linear motion platform of the embodiment of the present invention, when the first mover reciprocates along the first axis, the second mover will not move along the first axis accordingly, so that the movement of the first mover and the movement of the second mover do not interfere with each other, thereby improving the control accuracy; at the same time, since the second mover does not reciprocate along the first axis along with the movement of the first mover, the size of the second drive mechanism can be greatly reduced, the cost is reduced, and the load of the first mover is reduced, so that the first mover can output a larger acceleration and improve the working cycle.

[0008] The technical solution is further described below:

[0009] In one embodiment, the second guide member is provided with a first mounting portion, the second mover is provided with a second mounting portion that can match with the first mounting portion, and the second mounting portion and the first mounting portion are provided with at least two matching fixed positions, so that the movement between the first mover and the second mover is more flexible and convenient.

[0010] In one embodiment, the base is provided with a third guide member arranged along the first axis direction, the first moving seat includes a first guide surface, and the first guide surface is provided with a fourth guide member capable of guiding and cooperating with the third guide member. By means of the guiding cooperation between the third guide member and the fourth guide member, the first moving seat can reciprocate relative to the base plate along the first axis direction under the drive of the first mover.

[0011] In one embodiment, the first moving seat further comprises a second guide surface, the second guide surface is arranged relative to the first guide surface with a spacing, the second guide surface is provided with a fifth guide member, and the second moving seat is provided with a sixth guide member capable of guiding and cooperating with the fifth guide member. By means of the guiding cooperation between the fifth guide member and the sixth guide member, the second moving seat can reciprocate relative to the first moving seat along the second axis direction under the drive of the second mover.

[0012] In one embodiment, the first driving mechanism includes a first linear motor, on which the first mover is disposed; the second driving mechanism includes a second linear motor, on which the second mover is disposed. This enables the linear motion platform to run smoothly, with high acceleration, high control accuracy and high repeatability, thus meeting the high-precision use requirements of the equipment.

[0013] In one embodiment, the linear motion platform further includes a first scale grating and a first grating reading head, wherein the first scale grating is disposed on the first motion seat, the first grating reading head is disposed on the base, and the first grating reading head is disposed with a relative spacing from the first scale grating, and is used to detect the linear displacement of the first motion seat in the direction of the first axis. The closed-loop control formed by the first scale grating and the first grating reading head can accurately detect the linear displacement of the first motion seat in the direction of the first axis, thereby improving the control accuracy.

[0014] In one embodiment, the linear motion platform further includes a second scale grating and a second grating reading head, wherein the second scale grating is disposed on the second motion seat, the second grating reading head is disposed on the first motion seat, and the second grating reading head is disposed with a relative spacing from the second scale grating, and is used to detect the linear displacement of the second motion seat in the direction of the second axis. The closed-loop control formed by the second scale grating and the second grating reading head can accurately detect the linear displacement of the second motion seat in the direction of the second axis, thereby improving the control accuracy.

[0015] In one embodiment, the linear motion platform further includes a first auxiliary guide member and a second auxiliary guide member, wherein the first auxiliary guide member cooperates with the first mover guide, and the second auxiliary guide member cooperates with the second mover guide. In this way, vibration of the first mover and the second mover during movement is avoided, thereby ensuring operation accuracy.

[0016] In one embodiment, the linear motion platform further includes a first heat sink and a second heat sink, wherein the first heat sink is used to dissipate heat for the first linear motor, and the second heat sink is used to dissipate heat for the second linear motor, thereby ensuring that the first linear motor and the second linear motor work normally at a suitable temperature.

[0017] In one embodiment, the first mover and the second mover are both configured as permanent magnets; the first stator of the first linear motor and the second stator of the second linear motor are both configured as coils. This can prevent the wire from moving with the movement of the first mover or the second mover, thereby not affecting the normal operation of other components, and also make the resistance of the first mover or the second mover during operation controllable, with high control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a linear motion platform according to one embodiment from one perspective;

[0019] Figure 2 for Figure 1 The front view of the linear motion platform;

[0020] Figure 3 for Figure 1 A top view of the linear motion platform;

[0021] Figure 4 for Figure 3 The cross-sectional view of the linear motion platform in the AA direction;

[0022] Figure 5 for Figure 1 A schematic diagram of the structure of the connection components of the linear motion platform;

[0023] Figure 6 for Figure 1 Exploded diagram of the linear motion platform.

[0024] Description of reference numerals:

[0025] 10. Linear motion platform, 110. Base, 111. Third guide, 120. First moving seat, 121. Fifth guide, 130. Second moving seat, 140. Connecting assembly, 141. First guide, 142. Second guide, 150. First driving mechanism, 151. First mover, 152. First stator, 160. Second driving mechanism, 161. Second mover, 171. First scale grating, 172. First grating reading head, 181. Second scale grating, 182. Second grating reading head, 191. First auxiliary guide, 192. First heat dissipation device, 193. Second heat dissipation device, 1421. First mounting portion. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or being "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "sealed connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to restrict the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The terms "first", "second", "third" and the like in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0030] like Figures 1 to 3 As shown, one embodiment of the present invention discloses a linear motion platform 10, including: a base 110; a first motion seat 120, the first motion seat 120 is guided and matched with the base 110, and the first motion seat 120 can reciprocate along a first axis relative to the base 110; a second motion seat 130, the second motion seat 130 is arranged above the first motion seat 120, the second motion seat 130 is guided and matched with the first motion seat 120, and the second motion seat 130 can reciprocate along a second axis relative to the first motion seat 120, and the second axis is arranged at an angle with the first axis; a connecting component 140, a connecting component 140 includes a first guide member 141 and a second guide member 142 that guide and cooperate with each other, the first guide member 141 is fixed on the second moving seat 130, and the second guide member 142 is arranged along the first axis direction; a first driving mechanism 150, the first driving mechanism 150 includes a first mover 151, the first mover 151 is connected to the first moving seat 120, and the first mover 151 can reciprocate along the first axis direction; and a second driving mechanism 160, the second driving mechanism 160 includes a second mover 161, the second mover 161 is connected to the second guide member 142, and the second mover 161 can reciprocate along the second axis direction.

[0031] When the linear motion platform 10 of the above-mentioned embodiment is in use, the first driving mechanism drives the first mover 151 to reciprocate along the first axis direction, thereby driving the first moving seat 120 to reciprocate along the first axis direction relative to the base 110, and then driving the second moving seat 130 to reciprocate along the first axis direction; since the first guide member 141 is fixed on the second moving seat 130 and the first guide member 141 and the second guide member 142 are guided and matched, when the second moving seat 130 reciprocates along the first axis direction, it only drives the first guide member 141 to reciprocate along the trajectory of the second guide member 142, and the second mover 161 of the second driving mechanism will not reciprocate along the first axis direction; only when the second driving mechanism drives the second mover 161 to reciprocate along the second axis direction, will it drive the second moving seat 130 to reciprocate along the second axis direction relative to the first moving seat 120. In the linear motion platform 10 of the embodiment of the present invention, when the first mover 151 reciprocates along the first axis, the second mover 161 will not move along the first axis, so that the movement of the first mover 151 and the movement of the second mover 161 do not interfere with each other, thereby improving the control accuracy; at the same time, since the second mover 161 does not reciprocate along the first axis with the movement of the first mover 151, the size of the second drive mechanism can be greatly reduced, the cost is reduced, and the load of the first mover 151 is reduced, so that the first mover 151 can output a larger acceleration and improve the working cycle.

[0032] It should be noted that the angle between the first axis direction and the second axis direction is in,

[0033] like Figure 2 and Figure 3 As shown, in one embodiment, the first guide member 141 is configured as a slider, and the second guide member 142 is configured as a slide rail capable of cooperating with the slider guide, and the slider can reciprocate along the length direction of the slide rail. The first mover 151 reciprocates along the first axis direction, driving the second moving seat 130 to reciprocate along the first axis direction, and the slider reciprocates along the length direction of the slide rail, that is, reciprocates along the first axis direction, while the second mover 161 connected to the guide rail remains stationary and does not move along the first axis direction with the movement of the first mover 151.

[0034] In other embodiments, the guiding cooperation between the first guide member 141 and the second guide member 142 can also be achieved by rolling cooperation, for example, by the cooperation of a guide rail and a roller. It is only necessary to enable the first guide member 141 to reciprocate along the direction of the first axis, that is, to reciprocate along the length direction of the second guide member 142.

[0035] Optionally, the second guide member 142 is provided with a first mounting portion 1421, the second mover 161 is provided with a second mounting portion (not shown) that can cooperate with the first mounting portion 1421, and the second mounting portion and the first mounting portion 1421 are provided with at least two matching fixing positions. The connection between the second guide member 142 and the second mover 161 is achieved through the cooperation between the first mounting portion 1421 and the second mounting portion. Further, the second mounting portion and the first mounting portion 1421 are provided with at least two matching fixing positions, so that the second guide member 142 can be installed and fixed after being moved relative to the second mover 161 in the first axis direction, so that the displacement of the first guide member 141 in the first axis direction can be flexibly set as needed, so that the movement between the first mover 151 and the second mover 161 is more flexible and convenient. The first mounting portion 1421 and the second mounting portion of the embodiment of the present invention can be that the first mounting portion 1421 is a first mounting hole, and the second mounting portion is a straight groove extending along the first axial direction, or the first mounting portion 1421 is a second mounting hole, and the second mounting portion is at least two third mounting holes that are spaced apart along the first axial direction and can match the second mounting hole. It is only necessary to ensure that the second guide member 142 can be moved in the first axial direction relative to the second mover 151 when installed, and can be relatively fixed when moved to a suitable position.

[0036] In one embodiment, the base 110 is provided with a third guide member 111 arranged along the first axis direction, and the first moving seat 120 includes a first guide surface, and the first guide surface is provided with a fourth guide member (not shown) capable of guiding and cooperating with the third guide member 111. The first guide surface is arranged opposite to the base 110, and the guiding cooperation between the third guide member 111 and the fourth guide member enables the first moving seat 120 to reciprocate relative to the substrate along the first axis direction under the drive of the first mover 151. The guiding cooperation between the third guide member 111 and the fourth guide member of the embodiment of the present invention can be achieved in a sliding cooperation manner, such as through the cooperation between the slide rail and the slider, or in a rolling cooperation manner, such as through the cooperation between the guide rail and the roller, as long as it can enable the first moving seat 120 to reciprocate relative to the base 110 along the first axis direction.

[0037] In one embodiment, the first moving seat 120 further includes a second guide surface, the second guide surface is arranged with a relative spacing from the first guide surface, a fifth guide member 121 is arranged on the second guide surface, and a sixth guide member (not shown) capable of guiding and cooperating with the fifth guide member 121 is arranged on the second moving seat 130. The second guide surface is arranged directly opposite to the second moving seat 130, and the guiding cooperation between the fifth guide member 121 and the sixth guide member enables the second moving seat 130 to reciprocate along the second axis relative to the first moving seat 120 under the drive of the second mover 161. The guiding cooperation between the fifth guide member 121 and the sixth guide member in the embodiment of the present invention can be achieved in a sliding cooperation manner, such as through the cooperation between a slide rail and a slider, or in a rolling cooperation manner, such as through the cooperation between a guide rail and a roller, as long as the second moving seat 130 can reciprocate along the second axis relative to the first moving seat 120.

[0038] On the basis of any of the above embodiments, the first driving mechanism 150 includes a first linear motor, on which a first mover 151 is provided; the second driving mechanism 160 includes a second linear motor, on which a second mover 161 is provided. Therefore, the linear motion platform 10 can run smoothly, with large acceleration and high control accuracy and repeatability, meeting the equipment's high-precision use requirements. At the same time, the structure is simple and the volume is small, so that the linear motion platform 10 can develop in the direction of miniaturization and integration. The first linear motor and the second linear motor in the embodiment of the present invention are preferably voice coil motors, which have high control accuracy.

[0039] In one embodiment, the linear motion platform 10 further includes a first scale grating 171 and a first grating reading head 172. The first scale grating 171 is disposed on the first motion seat 120, and the first grating reading head 172 is disposed on the base 110. The first grating reading head 172 is disposed relatively spaced apart from the first scale grating 171, and is used to detect the linear displacement of the first motion seat 120 in the direction of the first axis. The closed-loop control formed by the first scale grating 171 and the first grating reading head 172 can accurately detect the linear displacement of the first motion seat 120 in the direction of the first axis, thereby improving the control accuracy and making the displacement of the first motion seat 120 in the direction of the first axis more accurate.

[0040] In one embodiment, the linear motion platform 10 further includes a second scale grating 181 and a second grating reading head 182. The second scale grating 181 is disposed on the second motion seat 130, and the second grating reading head 182 is disposed on the first motion seat 120. The second grating reading head 182 is disposed relatively spaced from the second scale grating 181, and is used to detect the linear displacement of the second motion seat 130 in the second axis direction. The closed-loop control formed by the second scale grating 181 and the second grating reading head 182 can accurately detect the linear displacement of the second motion seat 130 in the second axis direction, thereby improving the control accuracy and making the displacement of the second motion seat 130 in the second axis direction more accurate.

[0041] In one embodiment, the linear motion platform 10 further includes a first auxiliary guide 191 and a second auxiliary guide (not shown), wherein the first auxiliary guide 191 is in guiding cooperation with the first mover 151, and the second auxiliary guide is in guiding cooperation with the second mover 161. The first auxiliary guide 191 is used to play the role of auxiliary support for the first mover 151, which greatly improves the rigidity of the first mover 151, avoids the vibration of the first mover 151 during the movement, and ensures the operation accuracy of the first mover 151; the second auxiliary guide is used to play the role of auxiliary support for the second mover 161, which greatly improves the rigidity of the second mover 161, avoids the vibration of the second mover 161 during the movement, and ensures the operation accuracy of the second mover 161. The first auxiliary guide 191 and the second auxiliary guide of the embodiment of the present invention can be guide rails or slide rails, and they only need to be able to guide and support the first mover 151 and the second mover 161.

[0042] In one embodiment, the linear motion platform 10 further includes a first heat sink 192 and a second heat sink 193. The first heat sink 192 is used to dissipate heat for the first linear motor, and the second heat sink 193 is used to dissipate heat for the second linear motor. The first heat sink 192 and the second heat sink 193 can be used to dissipate heat for the first linear motor and the second linear motor, respectively, to ensure that the first linear motor and the second linear motor can work normally. The first heat sink 192 and the second heat sink 193 of the embodiment of the present invention can be a cooling fan, a heat pipe or other devices capable of dissipating heat.

[0043] In one embodiment, the first mover 151 and the second mover 161 are both configured as permanent magnets; the first stator 152 of the first linear motor and the second stator (not shown) of the second linear motor are both configured as coils. In this way, the wires can be prevented from moving with the movement of the first mover 151 or the second mover 161, thereby not affecting the normal operation of other components, and the resistance of the first mover 151 or the second mover 161 during operation can be controlled, with high control accuracy.

[0044] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as restrictions on the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A linear motion platform, It is characterized in that include: Pedestal; A first moving seat, the first moving seat is in guiding cooperation with the base, and the first moving seat can reciprocate relative to the base along a first axis direction; A second moving seat, the second moving seat is arranged above the first moving seat, the second moving seat is guided and matched with the first moving seat, and the second moving seat can reciprocate along a second axis direction relative to the first moving seat, and the second axis direction is arranged at an angle with the first axis direction; A connecting assembly, the connecting assembly comprising a first guide member and a second guide member which are mutually guided and matched, the second guide member is provided with a first mounting portion, the first guide member is fixedly arranged on the second moving seat, and the second guide member is arranged along the first axis direction; A first driving mechanism, wherein the first driving mechanism comprises a first mover, the first mover is connected to the first moving seat, and the first mover can reciprocate along the first axis direction; and A second driving mechanism, the second driving mechanism comprises a second mover, the second mover is provided with a second mounting portion capable of matching with the first mounting portion, and the second mounting portion and the first mounting portion are provided with at least two matching fixed positions, the second mover is connected to the second guide member, and the second mover can reciprocate along the second axis direction; the first mounting portion is a first mounting hole, and the second mounting portion is a straight groove extending along the first axis direction; The linear motion platform also includes a first heat dissipation device, a second heat dissipation device, a first auxiliary guide and a second auxiliary guide. The first driving mechanism includes a first linear motor, on which the first mover is provided. The second driving mechanism includes a second linear motor, on which the second mover is provided. The first heat dissipation device is used to dissipate heat for the first linear motor, and the second heat dissipation device is used to dissipate heat for the second linear motor. The first auxiliary guide cooperates with the first mover guide, and the second auxiliary guide cooperates with the second mover guide. The first mover and the second mover are both configured as permanent magnets. The first stator of the first linear motor and the second stator of the second linear motor are both configured as coils.

2. The linear motion platform according to claim 1, It is characterized in that The base is provided with a third guide member arranged along the first axis direction, the first moving seat includes a first guide surface, and the first guide surface is provided with a fourth guide member capable of guiding and cooperating with the third guide member.

3. The linear motion platform according to claim 2, It is characterized in that The first moving seat also includes a second guide surface, the second guide surface is arranged relative to the first guide surface and spaced apart, a fifth guide member is arranged on the second guide surface, and a sixth guide member capable of guiding and cooperating with the fifth guide member is arranged on the second moving seat.

4. The linear motion platform according to any one of claims 1 to 3, It is characterized in that It also includes a first scale grating and a first grating reading head, wherein the first scale grating is arranged on the first moving seat, the first grating reading head is arranged on the base, and the first grating reading head is arranged relatively to the first scale grating and is used to detect the linear displacement of the first moving seat in the direction of the first axis.

5. The linear motion platform according to any one of claims 1 to 3, It is characterized in that It also includes a second scale grating and a second grating reading head, the second scale grating is arranged on the second moving seat, the second grating reading head is arranged on the first moving seat, and the second grating reading head is arranged relatively spaced from the second scale grating, for detecting the linear displacement of the second moving seat in the direction of the second axis.

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