CN208614257U - Linear motion platform - Google Patents

Abstract

The utility model discloses a kind of linear motion platforms, comprising: pedestal；First kinematic nest and foot guide cooperate, and the first kinematic nest can opposite base moved back and forth along first axle direction；Second kinematic nest is set to above the first kinematic nest, and the second kinematic nest and the first kinematic nest guiding cooperate, and the second kinematic nest can be moved back and forth with respect to the first kinematic nest along second axis direction, and second axis direction and first axle direction are arranged in angle；Mutually the first guide part and the second guide part of guiding cooperation, the first guide part are fixedly arranged in the second kinematic nest, and the second guide part is arranged along first axle direction；First mover is connect with the first kinematic nest, and the first mover can be moved back and forth along first axle direction；Second mover is connect with the second guide part, and the second mover can be moved back and forth along second axis direction.The mover of the linear motion platform of the utility model, the mover of the first driving mechanism and the second driving mechanism can be non-interference, and control precision is high.

Description

Linear motion platform

technical field

The utility model relates to the technical field of driving devices, in particular to a linear motion platform.

Background technique

With the continuous improvement of the requirements for machining accuracy in the machining process, the requirements for the control accuracy of the motion platform are also constantly improved.

In the 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, resulting in the movement of the first drive mechanism. When the load becomes larger, the control accuracy is affected.

SUMMARY OF THE INVENTION

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 the control precision is high.

Its technical solutions are as follows:

A linear motion platform, comprising: a base; a first motion seat, the first motion seat is guided and matched with the base, and the first motion seat can reciprocate relative to the base along a first axis direction ; a second motion seat, the second motion seat is arranged above the first motion seat, the second motion seat is guided and matched with the first motion seat, and the second motion seat can be opposite to the first motion seat A moving seat reciprocates along a second axis direction, and the second axis direction and the first axis direction are arranged at an angle; a connection assembly, the connection assembly includes a first guide member and a second guide member that guide and cooperate with each other , the first guide member is fixed on the second motion seat, and the second guide member is arranged along the first axis direction; the first drive mechanism, the first drive mechanism includes a first mover , the first mover is connected with the first motion seat, and the first mover can reciprocate along the first axis direction; and a second drive mechanism, the second drive mechanism includes a second mover The second mover is connected with the second guide member, and the second mover can reciprocate along the second axis direction.

When the above-mentioned linear motion platform is in use, the first drive mechanism drives the first mover to reciprocate along the first axis direction, thereby driving the first moving seat relative to the base to reciprocate along the first axis direction, and then driving the second moving seat along the first axis direction. Reciprocating movement in the axis direction; since the first guide member is fixed on the second movement seat and the first guide member is guided and matched with the second guide member, when the second movement seat reciprocates along the first axis direction, only the first guide member is driven The part reciprocates along the track of the second guide, while the second mover of the second drive mechanism will not reciprocate along the first axis direction; only when the second drive mechanism drives the second mover to reciprocate along the second axis direction only when the second movement seat is driven to reciprocate relative to the first movement seat along the second axis direction. In the linear motion platform of the embodiment of the present invention, when the first mover reciprocates along the first axis direction, the second mover will not move along the first axis direction, so that the movement of the first mover and the second mover The movements of the two motors do not interfere with each other, which improves the control accuracy; at the same time, since the second mover does not reciprocate along the first axis with the movement of the first mover, the size of the second drive mechanism can be greatly reduced, reducing the The cost is reduced, and the load of the first mover is also reduced, so that the first mover can output a greater acceleration, and the working cycle is improved.

The technical solution is further described below:

In one embodiment, the second guide member is provided with a first mounting portion, the second mover is provided with a second mounting portion capable of matching with the first mounting portion, and the first mounting portion is The second mounting portion and the first mounting portion are provided with at least two matching and fixing positions. The movement between the first mover and the second mover is more flexible and convenient.

In one embodiment, the base is provided with a third guide member arranged along the first axis direction, the first motion seat includes a first guide surface, and the first guide surface is provided with a a fourth guide piece that is guided and matched with the third guide piece. Using 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 driving of the first mover.

In one embodiment, the first motion seat further includes a second guide surface, the second guide surface is spaced apart from the first guide surface, and a fifth guide member is provided on the second guide surface , a sixth guide member capable of guiding and matching with the fifth guide member is arranged on the second moving seat. The guide cooperation between the fifth guide member and the sixth guide member enables the second moving seat to reciprocate relative to the first moving seat along the second axis direction under the driving of the second mover.

In one of the embodiments, the first driving mechanism includes a first linear motor, and the first mover is provided on the first linear motor; the second driving mechanism includes a second linear motor, so The second mover is provided on the second linear motor. The linear motion platform can run stably, with large acceleration and high control accuracy and repeatability, which satisfies the high-precision use requirements of the equipment.

In one embodiment, the linear motion platform further includes a first scale grating and a first grating reading head, the first scale grating is arranged on the first motion seat, and the first grating reading head is arranged on the on the base, and the first grating reading head and the first scale grating are relatively spaced apart for detecting the linear displacement of the first moving 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 moving seat in the direction of the first axis, thereby improving the control precision.

In one embodiment, the linear motion platform further comprises a second scale grating and a second grating reading head, the second scale grating is arranged on the second motion seat, and the second grating reading head is arranged on the on the first moving seat, and the second grating reading head and the second scale grating are relatively spaced apart for detecting the linear displacement of the second moving 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 moving seat in the direction of the second axis, thereby improving the control precision.

In one of the embodiments, the linear motion platform further includes a first auxiliary guide member and a second auxiliary guide member, the first auxiliary guide member is guided and matched with the first mover, and the second auxiliary guide member is connected with the first auxiliary guide member. The second mover is guided and matched. In this way, vibration of the first mover and the second mover is avoided during the movement, and the running accuracy is ensured.

In one embodiment, the linear motion platform further includes a first heat dissipation device and a second heat dissipation device, the first heat dissipation device is used for heat dissipation of the first linear motor, and the second heat dissipation device is used for heat dissipation of the first linear motor. The second linear motor dissipates heat. It is ensured that the first linear motor and the second linear motor work normally under a suitable temperature.

In one embodiment, the first mover and the second mover are both set as permanent magnets; the first stator of the first linear motor and the second stator of the second linear motor are both Set to coil. It can prevent the wire from moving with the movement of the first mover or the second mover, so as not to affect the normal operation of other components, and also make the resistance of the first mover or the second mover controllable during operation, and the control accuracy high.

Description of drawings

1 is a schematic structural diagram of a linear motion platform in one embodiment from a viewing angle;

Fig. 2 is the front view of the linear motion platform of Fig. 1;

Fig. 3 is the top view of the linear motion platform of Fig. 1;

Fig. 4 is the sectional view of the A-A direction of the linear motion platform of Fig. 3;

5 is a schematic structural diagram of a connecting assembly of the linear motion platform of FIG. 1;

FIG. 6 is an exploded schematic diagram of the linear motion platform of FIG. 1 .

Description of reference numbers:

10. Linear motion platform, 110, base, 111, third guide, 120, first motion seat, 121, fifth guide, 130, second motion seat, 140, connecting assembly, 141, first guide , 142, the second guide, 150, the first drive mechanism, 151, the first mover, 152, the first stator, 160, the second drive mechanism, 161, the second mover, 171, the first scale grating, 172, first grating reading head, 181, second scale grating, 182, second grating reading head, 191, first auxiliary guide, 192, first heat sink, 193, second heat sink, 1421, first installation department.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and do not limit the protection scope of the present invention.

It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "fixed to" another element, or "fixedly connected" to another element, it may be detachable or non-detachable. When an element is referred to as being "connected" or "sealingly connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Similar terms such as "first", "second", "third" and the like mentioned in the present utility model do not represent a specific quantity and order, but are only used for the distinction of names.

As shown in FIGS. 1 to 3 , an embodiment of the present invention discloses a linear motion platform 10 , comprising: 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 relative to the base 110 along the first axis direction; the second motion seat 130 is arranged above the first motion seat 120 , and the second motion seat 130 is guided with the first motion seat 120 The second moving seat 130 can reciprocate relative to the first moving seat 120 along the second axis direction, and the second axis direction and the first axis direction are arranged at an included angle; the connecting assembly 140, the connecting assembly 140 includes a second axis that guides and cooperates with each other. A guide member 141 and a second guide member 142, the first guide member 141 is fixed on the second motion seat 130, and the second guide member 142 is arranged along the first axis direction; the first driving mechanism 150, the first driving mechanism 150 It includes a first mover 151, the first mover 151 is connected with the first motion seat 120, and the first mover 151 can reciprocate along the first axis direction; and a second drive mechanism 160, the second drive mechanism 160 includes a second The mover 161 and the second mover 161 are connected to the second guide member 142 , and the second mover 161 can reciprocate along the second axis direction.

When the linear motion platform 10 of the above embodiment is used, 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 relative to the base 110 along the first axis direction, thereby driving the first moving seat 120 to reciprocate along the first axis direction. The second movement seat 130 reciprocates along the first axis direction; since the first guide member 141 is fixed on the second movement seat 130 and the first guide member 141 and the second guide member 142 guide and cooperate, when the second movement seat 130 moves along the When the first axis direction reciprocates, only the first guide member 141 is driven to reciprocate along the trajectory of the second guide member 142, while the second mover 161 of the second drive mechanism does not reciprocate along the first axis direction; only when When the second driving mechanism drives the second mover 161 to reciprocate along the second axis direction, the second moving seat 130 is driven to reciprocate relative to the first moving seat 120 along the second axis direction. In the linear motion platform 10 of the embodiment of the present invention, when the first mover 151 reciprocates in the direction of the first axis, the second mover 161 will not move along the direction of the first axis, so that the movement of the first mover 151 is different from that of the first mover 151. The movements of the second mover 161 do not interfere with each other, which improves 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 first mover 161 can be greatly reduced. The size of the second drive mechanism reduces the cost, and also reduces the load of the first mover 151 , so that the first mover 151 can output greater acceleration and improve the working cycle.

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

As shown in FIG. 2 and FIG. 3 , in one embodiment, the first guide member 141 is set as a sliding block, the second guide member 142 is set as a sliding rail that can guide and cooperate with the sliding block, and the sliding block can be along the length of the sliding rail. Direction reciprocating movement. The first mover 151 reciprocates in the direction of the first axis, which drives the second moving seat 130 to reciprocate in the direction of the first axis, and the slider reciprocates in the direction of the length of the slide rail, that is, the reciprocation in the direction of the first axis, and the reciprocating motion in the direction of the first axis, and the reciprocating movement of the slider along the length direction of the slide rail. The connected second mover 161 remains stationary and will not move in the direction of the first axis with the movement of the first mover 151 .

In other embodiments, the guide fit between the first guide member 141 and the second guide member 142 may also be achieved by rolling fit, for example, by the fit of the guide rail and the roller, as long as the first guide member 141 can be used to make the first guide member 142 fit. 141 can reciprocate along the first axis direction, that is, reciprocate along the length direction of the second guide member 142 .

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 1421 is provided on the second guide member 142. The first mounting portion 1421 is provided with at least two matching and fixing positions. The connection between the second guide member 142 and the second mover 161 is realized 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 and fixing positions. , so that the second guide member 142 can move relative to the second mover 161 in the first axis direction and then be installed and fixed, so that the displacement amount of the first guide member 141 in the first axis direction can be flexibly set as required, 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 in the embodiment of the present invention may 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 axis direction, or the first mounting portion may be a first mounting hole. The mounting portion 1421 is a second mounting hole, and the second mounting portion is at least two third mounting holes spaced along the first axis direction that can be matched with the second mounting holes, and only needs to satisfy the requirement that the second guide member 142 is installed when the second guide member 142 is installed. It can move relative to the second mover 151 in the direction of the first axis, and can be relatively fixed when moved to an appropriate position.

In one embodiment, the base 110 is provided with a third guide member 111 disposed along the first axis direction, the first motion seat 120 includes a first guide surface, and the first guide surface is provided with a third guide member 111 capable of being connected with the third guide member 111 . Guide the mating fourth guide (not shown). Wherein, the first guide surface is disposed facing the base 110, and the guide and cooperation between the third guide member 111 and the fourth guide member are used, so that the first moving seat 120 can be driven by the first mover 151 relative to the base plate along the first Reciprocating movement in one axis direction. The guide fit between the third guide piece 111 and the fourth guide piece in the embodiment of the present invention can be achieved by sliding fit, for example, by the fit between the slide rail and the slider, or by rolling fit. For example, it is realized by the cooperation of the guide rail and the roller, and it only needs to satisfy the requirement that the first moving seat 120 can reciprocate relative to the base 110 along the first axis direction.

In one embodiment, the first movement seat 120 further includes a second guide surface, the second guide surface and the first guide surface are arranged at a distance from each other, the second guide surface is provided with a fifth guide member 121 , and the second movement seat 130 is provided with a fifth guide member 121 . There is a sixth guide member (not shown) that can guide and cooperate with the fifth guide member 121 . Wherein, the second guide surface is disposed facing the second moving seat 130 , and the second moving seat 130 can be driven by the second mover 161 relative to the first moving seat 130 by using the guiding cooperation between the fifth guiding member 121 and the sixth guiding member. A moving seat 120 reciprocates along the second axis direction. The guide fit between the fifth guide piece 121 and the sixth guide piece in the embodiment of the present invention can be achieved by sliding fit, for example, by the fit between the slide rail and the slider, or by rolling fit. For example, it is realized by the cooperation of the guide rail and the roller, and it only needs to satisfy the requirement that the second moving seat 130 can reciprocate relative to the first moving seat 120 along the second axis direction.

On the basis of any of the above embodiments, the first driving mechanism 150 includes a first linear motor, and the first linear motor is provided with a first mover 151; the second driving mechanism 160 includes a second linear motor, and the second linear motor A second mover 161 is provided on the motor. Therefore, the linear motion platform 10 can run stably, with large acceleration and high control accuracy and repeatability, which satisfies the high-precision use requirements of the equipment. At the same time, the structure is simple and the volume is small, so that the linear motion platform 10 can be miniaturized and integrated development. 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 precision.

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 base 120 , and the first grating reading head 172 is disposed on the base 110 The first grating reading head 172 and the first scale grating 171 are relatively spaced apart and used to detect the linear displacement of the first moving seat 120 in the first axis direction. 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 moving seat 120 in the direction of the first axis, improve the control accuracy, and make the first moving seat 120 more accurate. The displacement of 120 in the direction of the first axis is more accurate.

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 moving The second grating reading head 182 and the second scale grating 181 are relatively spaced apart from the seat 120 , for detecting the linear displacement of the second moving 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 moving seat 130 in the direction of the second axis, improve the control accuracy, and make the second moving seat 130 more accurate. The displacement of 130 in the direction of the second axis is more accurate.

In one embodiment, the linear motion platform 10 further includes a first auxiliary guide member 191 and a second auxiliary guide member (not shown), the first auxiliary guide member 191 guides and cooperates with the first mover 151, and the second auxiliary guide member Guide and cooperate with the second mover 161 . The first auxiliary guide 191 is used to assist the first mover 151, which greatly improves the rigidity of the first mover 151, prevents the first mover 151 from vibrating during the movement, and ensures the first mover 151. The running accuracy of the second mover 151 is improved; the second auxiliary guide is used to assist the second mover 161, which greatly improves the rigidity of the second mover 161 and prevents the second mover 161 from vibrating during the movement. The running accuracy of the second mover 161 is guaranteed. The first auxiliary guide member 191 and the second auxiliary guide member in the embodiment of the present invention may be guide rails or slide rails, as long as they can guide and support the first mover 151 and the second mover 161 .

In one embodiment, the linear motion platform 10 further includes a first heat dissipation device 192 and a second heat dissipation device 193. The first heat dissipation device 192 is used for heat dissipation of the first linear motor, and the second heat dissipation device 193 is used for heat dissipation of the second heat dissipation device. The linear motor dissipates heat. Using the first heat dissipation device 192 and the second heat dissipation device 193 can dissipate heat to the first linear motor and the second linear motor respectively, so as to ensure that the first linear motor and the second linear motor can work normally. The first heat dissipation device 192 and the second heat dissipation device 193 in the embodiment of the present invention may be a heat dissipation fan, a heat dissipation pipe or other devices capable of dissipating heat.

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 for the coil. In this way, the movement of the wires with the movement of the first mover 151 or the second mover 161 can be avoided, so that the normal operation of other components will not be affected, and the first mover 151 or the second mover 161 will not be affected during operation. The resistance is controllable and the control precision is high.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

The above embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a restriction on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications 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 for this utility model shall be subject to the appended claims.

Claims (10)

1. a linear motion platform, is characterized in that, comprises: pedestal; 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 motion seat, the second motion seat is disposed above the first motion seat, the second motion seat is guided and matched with the first motion seat, and the second motion seat can be opposite to the first motion seat The moving seat reciprocates along a second axis direction, and the second axis direction and the first axis direction are arranged at an included angle; A connecting assembly, the connecting assembly includes a first guide member and a second guide member that guide and cooperate with each other, the first guide member is fixed on the second motion seat, and the second guide member is along the first guide member. One axis direction setting; a first drive mechanism, the first drive mechanism includes a first mover, the first mover is connected with the first motion seat, and the first mover can reciprocate along the first axis direction; and A second driving mechanism, the second driving mechanism includes a second mover, the second mover is connected with the second guide member, and the second mover can reciprocate along the second axis direction. 2 . The linear motion platform according to claim 1 , wherein a first mounting portion is provided on the second guide member, and a first mounting portion is provided on the second mover that can cooperate with the first mounting portion. 3 . The second mounting portion is provided with at least two matching and fixing positions with the first mounting portion. 3 . The linear motion platform according to claim 1 , wherein the base is provided with a third guide member arranged along the first axis direction, and the first motion seat comprises a first guide surface, 3 . A fourth guide member capable of guiding and matching with the third guide member is provided on the first guide surface. 4 . The linear motion platform according to claim 3 , wherein the first motion seat further comprises a second guide surface, the second guide surface and the first guide surface are relatively spaced apart, and the first guide surface is 4. 5 . A fifth guide member is arranged on the two guide surfaces, and a sixth guide member capable of guiding and cooperating with the fifth guide member is arranged on the second moving seat. 5. The linear motion platform according to any one of claims 1 to 4, wherein the first driving mechanism comprises a first linear motor, and the first linear motor is provided with the first moving The second driving mechanism includes a second linear motor, and the second linear motor is provided with the second mover. 6 . The linear motion platform according to claim 5 , further comprising a first scale grating and a first grating reading head, the first scale grating is arranged on the first motion seat, and the first The grating reading head is arranged on the base, and the first grating reading head is relatively spaced from the first scale grating, and is used for linear displacement of the first moving seat in the direction of the first axis test. 7. The linear motion platform according to claim 5, further comprising a second scale grating and a second grating reading head, the second scale grating is arranged on the second motion seat, the second scale grating The grating reading head is arranged on the first moving seat, and the second grating reading head is relatively spaced from the second scale grating, and is used for checking the movement of the second moving seat in the direction of the second axis. Linear displacement is detected. 8 . The linear motion platform according to claim 5 , further comprising a first auxiliary guide member and a second auxiliary guide member, the first auxiliary guide member is guided and matched with the first mover, and the The second auxiliary guide member is guided and matched with the second mover. 9 . The linear motion platform according to claim 5 , further comprising a first heat dissipation device and a second heat dissipation device, the first heat dissipation device is used for heat dissipation of the first linear motor, and the The second heat dissipating device is used for dissipating heat to the second linear motor. 10 . The linear motion platform according to claim 5 , wherein the first mover and the second mover are both set as permanent magnets; the first stator of the first linear motor and the The second stators of the second linear motor are all configured as coils.