CN219107269U - Overhanging type linear motor and electric equipment comprising same - Google Patents

Abstract

The utility model provides an overhanging type linear motor and electric equipment comprising the same, which comprises a linear motor stator, a linear motor rotor, a workbench and a base, wherein two sides of the workbench are respectively connected to the base in a sliding way through at least one group of sliding rail modules, a groove is formed in the base, the linear motor stator is fixed on the inner wall surfaces of the two sides of the groove, and extends upwards along the corresponding inner wall, and the linear motor rotor is arranged at the bottom of the workbench and extends downwards; or the linear motor rotor is fixed on the inner wall surfaces at two sides of the groove, extends upwards along the corresponding inner wall surface, and the linear motor stator is arranged at the bottom of the workbench and extends downwards; the linear motor stator is arranged opposite to the linear motor rotor. The motor is arranged in a overhanging manner, so that the manufacturing cost of the base can be reduced, the difficulty in mounting the locking mechanism at the bottom of the bracket can be reduced, the rigidity of the base can be increased, the three-center line or four-center line can be kept, and the suitability of the motor and the mechanical structure can be optimized.

Description

Overhanging type linear motor and electric equipment comprising same

Technical Field

The utility model relates to the field of linear motors, in particular to an overhanging type linear motor and electric equipment comprising the same.

Background

In the prior art, the linear motor has the advantages of quick response, high speed and the like, and is widely applied to the fields of electronic and semiconductor equipment, UV spray painting industry, UV printing and dyeing industry, UV printing industry, UV glass industry, precise numerical control machine tool, high-end medical equipment, mobile phone detection industry, glass detection industry and the like.

The linear motor structure that current digit control machine tool adopted mainly has two modes, includes: conventional tiling, and opposed vertical arrangements. The opposite vertical arrangement structure means that the linear motor stators are arranged on two sides of the center, the linear motor stators are connected with the base, and the linear motor rotors are connected with the moving part and are arranged face to face with the linear motor stators. In the practical application, the magnetic attraction force of the stator component of the linear motor reaches a force balance state through opposite distribution, but the rotor of the linear motor is far apart due to arrangement intervals, and the magnetic attraction force is transmitted to the moving component and affects the force deformation of the moving component. Therefore, in practical applications the moving parts do not reach a complete force balance.

Meanwhile, no matter the linear motor is of a tiled type or a vertical type opposite arrangement structure, the stator and the rotor of the linear motor are easy to suck together due to the problem of magnetic attraction when the linear motor is operated, and the movement of the motor is influenced. Therefore, when the traditional linear motor is used, the traditional linear motor can be directly and completely embedded into a base to fix the stator of the linear motor, so that the problem of magnetic attraction is prevented, and the stator of the linear motor and the rotor are attracted together to generate friction force, thereby influencing the movement of the motor.

However, this method requires the base to be hollowed and perforated to fix the motor, and in some application scenarios of precision equipment, it is difficult to accurately position and punch the base. The cost of the base hollowing out is very high, the rigidity of the base can be greatly reduced, and the performance of linear motor application equipment is reduced.

In view of this, the present inventors devised a cantilever type linear motor and an electric device including the same, so as to overcome the above technical problems.

Disclosure of Invention

The utility model aims to overcome the defects that in the prior art, a linear motor stator and a rotor are easy to absorb together to generate friction force to influence motor movement and the like in the arrangement mode of the linear motor, and provides an overhanging type linear motor and electric equipment comprising the same.

The utility model solves the technical problems by the following technical proposal:

the utility model discloses an overhanging type linear motor which is characterized by comprising a linear motor stator, a linear motor rotor, a workbench and a base, wherein two sides of the workbench are respectively connected to the base in a sliding way through at least one group of sliding rail modules, a groove is formed in the base, the linear motor stator is fixed on two inner wall surfaces of the groove, and extends upwards along the corresponding inner wall, and the linear motor rotor is arranged at the bottom of the workbench and extends downwards;

or the linear motor rotor is fixed on the inner wall surfaces at two sides of the groove, extends upwards along the corresponding inner wall, and is arranged at the bottom of the workbench and extends downwards;

the linear motor stator is arranged opposite to the linear motor rotor, and the linear motor rotor moves relative to the linear motor stator when the linear motor operates.

According to one embodiment of the utility model, each set of the sliding rail modules comprises at least one set of guide rails and at least one set of sliding blocks, the sliding blocks are arranged on two sides of the bottom of the workbench, the guide rails are arranged on two sides of the upper end of the base, and the sliding blocks and the guide rails are arranged in a sliding manner.

According to one embodiment of the utility model, the bottom of the workbench is provided with a downward extending rotor mounting bracket, and the linear motor rotor is mounted on the left side and the right side of the rotor mounting bracket.

According to one embodiment of the utility model, a group of stator mounting brackets which are suspended upwards are respectively arranged on the left side wall and the right side wall of the groove, and the linear motor stator is arranged on the left side and the right side of the stator mounting brackets.

According to one embodiment of the utility model, the upper part of the stator mounting bracket is provided as an upwardly overhanging part, the bottom of which is locked with the base by a first locking mechanism, and the bottom of the stator mounting bracket is locked with the base by a second locking mechanism.

According to one embodiment of the utility model, clamping grooves are respectively formed in two sides of the bottom of the groove, and the bottom of the stator mounting bracket is inserted into and fixed in the corresponding clamping groove;

or the bottom of the stator mounting bracket is attached to the bottom of the groove, a lower bottom plate is embedded between the stator mounting brackets on the left side and the right side, and the stator mounting brackets are locked with the base.

According to one embodiment of the utility model, the rotor mounting bracket comprises a rotor mounting bracket mounting part and a cantilever beam, wherein the cantilever beam is fixed on the lower end surface of the rotor mounting bracket mounting part;

the bottom of the workbench is provided with a mounting groove, and the mounting part of the rotor mounting bracket is fixed in the mounting groove.

According to one embodiment of the utility model, the mover mounting bracket adopts a frame structure, and the linear motor mover is embedded and fixed in the frame structure.

According to one embodiment of the utility model, the mover mounting bracket is T-shaped, L-shaped or Z-shaped.

According to one embodiment of the utility model, the mover mounting bracket adopts an I-shaped structure, and the upper bottom surface, the lower bottom surface and one side surface of the linear motor mover are fixed with the mover mounting bracket.

According to one embodiment of the utility model, the linear motor mover is fixed on the mover mounting bracket by top fixing, side fixing or detachable fixing.

According to one embodiment of the utility model, the overhanging type linear motor further comprises a measuring device, wherein the measuring device is arranged on the base and is used for measuring the movement position of the linear motor rotor;

the movement center of the sliding rail module, the measurement center of the measuring device and the thrust center of the linear motor assembly are positioned on the same straight line.

The utility model also provides electric equipment which is characterized by comprising the overhanging type linear motor.

The utility model has the positive progress effects that:

compared with the prior art, the overhanging type linear motor and the electric equipment comprising the same have the following beneficial effects:

1. the motor can be arranged in a cantilever manner;

2. the manufacturing cost of the base can be reduced;

3. the difficulty in mounting the locking mechanism at the bottom of the bracket can be reduced;

4. the rigidity of the base can be increased;

5. the three-heart line or four-heart line can be kept, so that the suitability of the motor and the mechanical structure is optimized.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which like reference characters designate like features throughout the drawings, and in which:

fig. 1 is a perspective view of a mounting structure of an overhanging type linear motor of the present utility model.

Fig. 2 is a longitudinal sectional view of a mounting structure of the cantilever type linear motor of the present utility model.

Fig. 3 is a schematic diagram showing the installation between a linear motor mover and a mover installation bracket in the cantilever type linear motor of the present utility model.

Fig. 4 is a schematic diagram of the measuring center line of the grating ruler in the cantilever type linear motor of the utility model.

Fig. 5 is a schematic view of the center line of motion of a linear guide in the cantilever type linear motor of the present utility model.

Fig. 6 is a schematic diagram of the thrust center line of the linear motor in the cantilever type linear motor according to the present utility model.

Fig. 7 is a perspective view of a first embodiment of the suspended linear motor of the present utility model.

Fig. 8 is a longitudinal cross-sectional view of a first embodiment of the suspended linear motor of the present utility model.

Fig. 9 is a perspective view of a second embodiment of the suspended linear motor of the present utility model.

Fig. 10 is a longitudinal cross-sectional view of a second embodiment of the cantilever-type linear motor of the present utility model.

Fig. 11 is a perspective view of a third embodiment of the suspended linear motor of the present utility model.

Fig. 12 is a longitudinal cross-sectional view of a third embodiment of the suspended linear motor of the present utility model.

Fig. 13 is a perspective view of a fourth embodiment of the suspended linear motor of the present utility model.

Fig. 14 is a longitudinal cross-sectional view of a fourth embodiment of the suspended linear motor of the present utility model.

Fig. 15 is a schematic view of a mounting structure of the mover mounting bracket and the linear motor mover in fig. 13.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Furthermore, although terms used in the present utility model are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present utility model is understood, not simply by the actual terms used but by the meaning of each term lying within.

Embodiment one:

as shown in fig. 1 to 8, the present utility model also discloses a cantilever type linear motor, which includes a linear motor stator 10, a linear motor mover 20, a table 30, and a base 40. Wherein, two sides of the working table 30 are respectively slidably connected to the base 40 through at least one set of sliding rail modules. A groove 41 is formed in the base 40, the linear motor stator 10 is fixed on inner wall surfaces at two sides of the groove 41, and extends upwards along the corresponding inner wall surface, and the linear motor rotor 20 is installed at the bottom of the workbench 30 and extends downwards.

Alternatively, the linear motor mover 20 may be fixed to both inner wall surfaces of the groove 41, and the linear motor stator 10 may be mounted at the bottom of the table 30 to extend downward while being suspended upward along the corresponding inner wall surfaces. The linear motor stator 10 is disposed opposite to the linear motor mover 20.

When the linear motor is operated, the linear motor mover 20 moves relative to the linear motor stator 10.

Preferably, each set of the sliding rail modules includes at least one set of guide rails 60 and at least one set of sliding blocks 70, the sliding blocks 70 are installed at both sides of the bottom of the workbench 30, the guide rails 60 are installed at both sides of the upper end of the base 40, and the sliding blocks 70 are slidably disposed relative to the guide rails 60.

Further preferably, a mover mounting bracket 31 extending downward is provided at the bottom of the table 30, and the linear motor mover 20 is mounted on both left and right sides of the mover mounting bracket 31.

The mover mounting bracket 31 may be preferably T-shaped, L-shaped or Z-shaped to fix the linear motor mover 20 to the various types of mover mounting brackets 31. For example, the linear motor mover 20 may be fixed by a top, may be fixed by a side, or may be detachably fixed to the mover mounting bracket 31. The main function of the linear motor is to connect the linear motor rotor with the workbench so as to realize the function that the linear motor rotor drives the workbench to move.

A set of stator mounting brackets 11 are provided on the left and right side walls of the groove 41, respectively, to hang upward, and the linear motor stator 10 is mounted on the left and right sides of the stator mounting brackets 11.

In particular, the upper portion of the stator mounting bracket 11 is provided as an upwardly overhanging portion 111, the bottom of the upwardly overhanging portion 111 being locked with the base 40 by a first locking mechanism, and the bottom of the stator mounting bracket 11 being locked with the base 40 by a second locking mechanism.

For example, in the present embodiment, the bottom of the stator mounting bracket 11 is attached to the bottom of the groove 41, and a lower plate 12 is inserted between the stator mounting brackets 11 on the left and right sides, and the stator mounting brackets 11 are locked with the base 40 by the lower plate 12. That is, the stator mounting bracket 11 is first placed in the base 40, and then the stator mounting bracket 11 is locked with the base 40 by inserting a lower plate 12 between the stator mounting brackets 11 on the left and right sides.

In this structure, the second locking mechanism adopts a bottom plate type linear motor mounting structure. Alternatively, the bottom of the groove 41 may be configured as a planar structure, and the bottom of the stator mounting bracket 11 is attached to the bottom of the groove 41 and then locked to the base 40 by the second locking mechanism.

Of course, the above structure is only an example, and the second locking mechanism between the stator mounting bracket and the base may have various forms, and the principle thereof is consistent, so that the stator mounting bracket and the base may be locked, which are all within the protection scope of the present application, and are not described herein.

In particular, the meaning of the locking mechanism in the present application is: and fixing means for fixing the linear motor stator mounting bracket to the base 40. The first locking mechanism is disposed at the upper middle portion of the linear motor stator frame, and can fix the upper middle portion of the linear motor stator frame to the base 40. The second locking mechanism is disposed at the bottom of the linear motor stator frame, and can fix the lower part of the linear motor stator frame to the base 40. The first locking mechanism is disposed at the upper middle portion of the linear motor stator frame, and can fix the upper middle portion of the linear motor stator frame to the base 40.

Preferably, the mover mounting bracket 31 includes a mover mounting bracket mounting portion 311 and a cantilever beam 312, and the cantilever beam 312 is fixed to a lower end surface of the mover mounting bracket mounting portion 311. A mounting groove 32 is formed in the bottom of the table 30, and a mover mounting bracket mounting portion 311 is fixed in the mounting groove 32.

The cantilever 312 is a simplified model obtained in the material mechanics for the convenience of calculation and analysis, and one end of the cantilever 312 is a fixed support, and the other end is a free end.

Further, the cantilever type linear motor of the present utility model may further comprise a measuring device 50, such as a grating ruler, according to the above description. The measuring device 50 is mounted on the base 40 for measuring the movement position of the linear motor mover 20. The center of motion of the slide rail module, the center of measurement of the measuring device 50 and the center of thrust of the linear motor assembly are positioned on the same straight line.

The center of motion is preferably the center of motion transmission of the transmission part, i.e. the center of the joint surface of the transmission part, for example the center of motion of the joint surface of the linear guide motion and the roller of the slider.

The measuring center is preferably a measuring center of the measuring feedback member. The measuring feedback component is preferably a grating ruler, the structure of the grating ruler is composed of a reading head and a ruler body, a displacement numerical line is arranged on the ruler body, and the reading head of the grating ruler measures the position in real time through an optical principle and feeds back the position to the motion control system. Therefore, the center of the joint surface of the reading head of the grating ruler corresponding to the ruler body is the measuring center.

The thrust center is preferably the thrust center of the power source. The thrust center of the power source is the thrust center, and any object needs to move, so that a force application object is needed. The power source in this embodiment is preferably a linear motor assembly.

In addition, the center of mass may be disposed in line with the center of motion, the center of measurement, and the center of thrust (as shown in fig. 4 to 6). Through structural design, with the motion center, the measuring center, the thrust center with the corresponding different parts of quality center are installed on different horizontal planes, guarantee that respective central line is in same horizontal line.

The center of mass is preferably the center of mass of the moving part. The center of mass of the moving parts is the center of gravity of the moving parts after being combined together.

The installation method of the overhanging type linear motor adopts a three-heart and one-line or four-heart and one-line arrangement mode, so that the suitability of the motor and a mechanical structure can be optimized, and the integrity of the whole structure can be greatly improved.

The four centers are the same points, so that the effect that the motion states of the deflection force led out are inconsistent due to the force with the deflection center is avoided when the mechanism moves. If the measurement center is deviated, the measurement error increases when the movement states are not uniform. Secondly, the situation that the rigidity of the instant installation part is weaker and the accuracy is not affected due to eccentric force is avoided, and the three-in-one or four-in-one state greatly improves the following error and the operation and control characteristics of the moving part in the moving process.

Embodiment two:

as shown in fig. 9 and 10, the structure of the present embodiment is substantially the same as that of the first embodiment, except that: clamping slots 411 are respectively arranged on two sides of the bottom of the groove 41, and the bottom of the stator mounting bracket 11 is inserted into and fixed in the corresponding clamping slots 411.

In this structure, the second locking mechanism adopts a slot-type linear motor mounting structure, which locks the stator mounting bracket 11 with the base 40 after slotting on the left and right sides of the base.

This mounting structure can make the stator mounting bracket and the base 40 more firmly fixed, and improve the stability of the linear motor stator.

Embodiment III:

as shown in fig. 11 and 12, the structure of the present embodiment is substantially the same as that of the first embodiment, except that: the mover mounting bracket 31 adopts an i-shaped structure to fix the upper and lower bottom surfaces and one side surface of the linear motor mover 20 with the mover mounting bracket 31.

The mounting structure can realize the upper and lower bottom surfaces and one side surface of the linear motor rotor 20, and is more stable compared with a T-shaped rotor mounting bracket

Embodiment four:

as shown in fig. 13 to 15, the structure of the present embodiment is substantially the same as that of the first embodiment, except that: the mover mounting bracket 31 adopts a frame structure, and embeds and fixes the linear motor mover 20 in the frame structure.

In this mounting structure, the mover mounting bracket 31 is provided as a frame type which can fix at least one back surface and eight sides of the linear motor mover 20.

Compared with a T-shaped structure, the structure of the rotor mounting bracket 31 can reduce the transverse thickness of the lower end of the T-shaped bracket, and the transverse thickness of the two linear motor rotors distributes fixed force to each side of the linear motor rotors, so that materials are reduced, the mounting space is reduced, and the space occupation of the linear motor mounting structure in equipment is reduced.

In addition, the utility model also discloses electric equipment which comprises the overhanging type linear motor or comprises the overhanging type linear motor by adopting the overhanging type linear motor installation method.

According to the above structural description, the principle of the overhanging type linear motor of the utility model is as follows: the original multi-motor opposite arrangement structure is adjusted, the rotor component of the linear motor is moved to the middle position, and the stator component of the linear motor is moved to two sides to be oppositely arranged. The adjustment enables the magnetic attraction force born by the rotor component of the linear motor to be transmitted to the same point, so that the rotor component of the linear motor receives the magnetic attraction force with the same size in two directions, and the acting point of the magnetic attraction force is the same point, thereby achieving the equilibrium state of force. Further, the external force which originally influences the moving part disappears, the dynamic performance of the moving part is better, and the following error of the moving part is greatly reduced.

According to the overhanging type linear motor, the motor is made into overhanging arrangement, so that the manufacturing cost of the base can be reduced, the difficulty in mounting the locking mechanism at the bottom of the bracket can be reduced, the rigidity of the base can be increased, and the three-heart line or the four-heart line can be maintained.

In summary, the overhanging type linear motor and the electric equipment comprising the same have the following beneficial effects compared with the prior art:

1. the motor can be arranged in a cantilever manner;

2. the manufacturing cost of the base can be reduced;

3. the difficulty in mounting the locking mechanism at the bottom of the bracket can be reduced;

4. the rigidity of the base can be increased;

5. the three-heart line or four-heart line can be kept, so that the suitability of the motor and the mechanical structure is optimized.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (13)

1. The cantilever type linear motor is characterized by comprising a linear motor stator, a linear motor rotor, a workbench and a base, wherein two sides of the workbench are respectively connected to the base in a sliding manner through at least one group of sliding rail modules, a groove is formed in the base, the linear motor stator is fixed on two inner wall surfaces of the groove, and extends upwards along the corresponding inner wall surfaces, and the linear motor rotor is arranged at the bottom of the workbench and extends downwards;

or the linear motor rotor is fixed on the inner wall surfaces at two sides of the groove, extends upwards along the corresponding inner wall, and is arranged at the bottom of the workbench and extends downwards;

the linear motor stator is arranged opposite to the linear motor rotor, and the linear motor rotor moves relative to the linear motor stator when the linear motor operates.

2. The overhanging type linear motor as claimed in claim 1, wherein each of the plurality of sliding rail modules comprises at least one set of guide rail and at least one set of sliding block, the sliding block is installed at both sides of the bottom of the working table, the guide rail is installed at both sides of the upper end of the base, and the sliding block is arranged in a sliding manner relative to the guide rail.

3. The overhanging type linear motor as claimed in claim 1, wherein a mover mounting bracket extending downward is provided at a bottom of the table, and the linear motor mover is mounted at left and right sides of the mover mounting bracket.

4. The overhanging type linear motor as claimed in claim 1, wherein a set of stator mounting brackets overhanging upward are provided on both left and right side walls of the groove, respectively, and the linear motor stator is mounted on both left and right sides of the stator mounting brackets.

5. The cantilevered linear motor of claim 4 wherein the upper portion of the stator mounting bracket is configured as an upwardly cantilevered portion, the bottom of the upwardly cantilevered portion being locked to the base by a first locking mechanism, the bottom of the stator mounting bracket being locked to the base by a second locking mechanism.

6. The overhanging type linear motor as claimed in claim 5, wherein both sides of the bottom of the groove are respectively provided with a clamping groove, and the bottom of the stator mounting bracket is inserted into and fixed in the corresponding clamping groove;

or the bottom of the stator mounting bracket is attached to the bottom of the groove, a lower bottom plate is embedded between the stator mounting brackets on the left side and the right side, and the stator mounting brackets are locked with the base.

7. The overhanging type linear motor as claimed in claim 3, wherein the mover mounting bracket comprises a mover mounting bracket mounting portion and a cantilever beam fixed to a lower end surface of the mover mounting bracket mounting portion;

the bottom of the workbench is provided with a mounting groove, and the mounting part of the rotor mounting bracket is fixed in the mounting groove.

8. A cantilevered linear motor as claimed in claim 3 wherein the mover mounting bracket is of a frame construction and the linear motor mover is embedded and secured within the frame construction.

9. The overhanging type linear motor as claimed in claim 3, wherein the mover mounting bracket is T-shaped, L-shaped or Z-shaped.

10. The overhanging type linear motor as claimed in claim 3, wherein the mover mounting bracket is in an i-shaped structure, and upper and lower bottom surfaces and a side surface of the linear motor mover are fixed to the mover mounting bracket.

11. A cantilevered linear motor as claimed in claim 3 wherein the linear motor mover is secured to the mover mounting bracket by top securing, side securing or removable securing.

12. The overhanging type linear motor as claimed in claim 1, further comprising a measuring device mounted on the base for measuring a moving position of the mover of the linear motor;

the movement center of the sliding rail module, the measurement center of the measuring device and the thrust center of the linear motor assembly are positioned on the same straight line.

13. An electrical device comprising the cantilevered linear motor of any one of claims 1-12.

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