CN214281188U - Linear motor module of externally-embedded groove guide rail - Google Patents

Abstract

The utility model discloses an external embedded groove guide's linear electric motor module, relate to linear electric motor module technical field, including the linear electric motor main part, sliding construction, a pedestal, the end plate, the apron, the linear electric motor main part includes the slider, the base includes the bottom plate, two curb plates form the base cavity with bottom plate fixed connection, both sides are connected around end plate and the base, base cavity front side is plugged up to the end plate, the rear side, the apron sets up in base cavity upside, the end plate makes the end plate support the apron with the cover connection, the slider includes the mainboard, sliding foot and mainboard bottom fixed connection, sliding foot sets up the outside at adjacent curb plate, sliding foot passes through sliding construction and the lateral wall sliding connection of adjacent curb plate. The sliding feet and the sliding structure are positioned outside the base, so that the inner space of the cavity of the base is not occupied, and the sliding structure is convenient to process if the sliding structure breaks down; the cover plate, the end plate and the base are encircled to form a base cavity, so that foreign matters can be prevented from entering the linear motor module.

Description

Linear motor module of externally-embedded groove guide rail

Technical Field

The utility model belongs to linear electric motor module structure field, in particular to linear electric motor module of outer embedded groove guide rail.

Background

A linear motor is a transmission device that directly converts electric energy into mechanical energy for linear motion without any intermediate conversion mechanism. In the field of linear motor module platforms, a linear motor is mainly used for carrying closed-loop grating position feedback and is applied to a linear motion system with high precision, high acceleration and high rigidity requirements. The traditional rolling linear guide rail is widely applied to motion systems of various types of equipment at present, the internal structures of linear guide rails of various brands are different, and the installation size is standardized. However, with the continuous updating of the equipment, the time benefit, the space benefit and the product precision are more and more emphasized. Therefore, the size of the linear motor module and the size of the bearing capacity become important indexes for evaluating the overall performance of the linear motor module.

In order to compress the size of the linear motor module, improve the rigidity of the linear motor module and increase the bearing capacity of the linear motor module, a person skilled in the art designs an embedded groove guide rail linear motor module to solve the problems, namely, two groove guide rails are embedded on the inner side wall of a U-shaped cavity of a base to serve as module guide, a sliding block and a linear motor rotor are both arranged inside the cavity of the module, the sliding block provides sliding guide for a sliding platen, and the linear motor rotor provides power for the module. The embedded groove guide rail linear motor module is embedded in the base, the size of the linear motor module is compressed, the height of the linear motor module is reduced, the stability and the rigidity of the linear motor module are improved, and the higher operation precision is guaranteed. However, the embedded groove guide rail linear motor module arranges the sliding block in the base cavity, occupies more space of the base cavity, and needs to arrange the sliding block at the front side and the rear side of the linear motor rotor on the premise of ensuring certain bearing capacity and stability, so that the sliding bedplate is longer and the module size is longer; after the position of the sliding block and the position of the rotor are staggered, the magnetic attraction between the moving stator and the moving stator of the linear motor can generate larger moment on the sliding block, and the service life of the sliding block and the bearing capacity of the module are influenced. The linear motor module that prior art discloses often lacks the protection casing, if have the foreign matter in a confused state of mind go into inside the linear motor module at the operation in-process, then can influence the operation precision and the stability of linear motor module.

Disclosure of Invention

In order to solve the problem, an object of the utility model is to provide an embedded groove guide's linear electric motor module, slider and base outside sliding connection reduce the base cavity inner space who occupies.

Another object of the utility model is to provide an embedded groove guide's linear electric motor module, sliding construction sets up in the base outside, if sliding construction breaks down convenient maintenance.

Another object of the utility model is to provide an inlay formula slot guide's linear electric motor module outward, apron, end plate and base play the guard action to the inside spare part of base cavity, can prevent that the foreign matter from getting into inside the linear electric motor module, improve the stability of linear electric motor module operation.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides an embedded groove guide's linear electric motor module outward, including the linear electric motor main part, sliding structure, a pedestal, the end plate, the apron, the linear electric motor main part includes the slider, the base includes the bottom plate, two curb plates form the base cavity with bottom plate fixed connection, the end plate is connected with both sides around the base, base cavity front side is plugged up to the end plate, the rear side, the apron sets up in base cavity upside, the end plate makes the end plate support the apron with the cover connection, the slider includes the mainboard, sliding foot and mainboard bottom fixed connection, sliding foot sets up the outside at adjacent curb plate, sliding foot passes through sliding structure and the lateral wall sliding connection of adjacent curb plate. The sliding block is connected with the outer side of the base in a sliding mode through the sliding foot, so that the sliding foot and the sliding structure are both positioned on the outer side of the base, the inner space of a cavity of the base is not occupied, the length of the sliding block can be designed according to the power structure in the linear motor main body, and the linear motor module is compact in structure and has high bearing capacity and high stability; if the sliding structure of the linear motor module fails, the cover plate does not need to be disassembled and assembled, the sliding structure can be directly treated externally, is simple and convenient, and can prevent the inconvenience caused by the fact that parts in the sliding structure fall into the cavity of the base; the cover plate, the end plate and the base have a protection effect on parts inside the base cavity, foreign matters can be prevented from entering the linear motor module, and the operation stability of the linear motor module is improved.

Furthermore, the slider includes two smooth feet, and two smooth feet are parallel to each other, and every smooth foot is through a sliding construction and the lateral wall sliding connection of adjacent curb plate respectively, and two sliding construction are parallel to each other and the plane of constituteing is parallel with the bottom plate. The height of the whole structure of the linear motor module is lower due to the parallel arrangement of the sliding feet and the parallel arrangement of the sliding structure, so that the good stability and the strong shock resistance of the linear motor module are ensured.

Further, the linear motor main body further comprises a magnetic track and a linear motor rotor, the magnetic track and the linear motor rotor are arranged in the cavity of the base, the main plate is fixedly connected with the linear motor rotor, and the magnetic track is installed on the bottom plate and corresponds to the linear motor rotor in position. The linear motor rotor and the magnetic track are always kept with a certain air gap without contact, so that the contact friction resistance between the linear motor rotor and the magnetic track is eliminated, the sensitivity and the follow-up property of the linear motor module are improved, the non-contact transmission force is realized, the mechanical friction loss is almost zero, the faults are few, and the reliability of the linear motor module is improved.

Further, each sliding structure comprises a rolling body, a sliding rail and a return device; the outer sides of the two side plates are respectively provided with groove channels which are inwards recessed, each sliding foot is respectively provided with a groove which is inwards recessed at the position corresponding to the groove channel, the sliding rails are arranged in the groove channels and the grooves to form rolling body channels, the backflow device is embedded inside the sliding foot, the backflow device and the rolling body channels form a closed loop, and the rolling bodies roll in the closed loop. The groove channel is internally provided with the slide rail, so that the slide rail and the base are integrated together, the linear motor module is compact in structure, the requirements on small size and high precision are met, the material originally used for guaranteeing the linear strength of the slide rail is omitted, and the material cost is saved. The rolling body, the reflux device and the rolling body channel form a guide body, the linear motor module is guided to realize high-precision linear reciprocating motion, and the linear motor module also plays a role in supporting the sliding block and bearing load. The sliding feet, the sliding structure, the groove channel and the groove are all arranged outside the cavity of the base, the inner space of the cavity of the base is not occupied, and the length of the sliding block can be correspondingly designed according to the structure of the rotor of the linear motor, so that the linear motor module has a compact structure and also has larger bearing capacity and stronger stability; the sliding structure is convenient to maintain when in failure, and can prevent the rolling bodies from falling into the cavity of the base or being adsorbed on the magnetic track to cause inconvenience.

Furthermore, an oil filling hole is formed in the sliding block, an oil filling nozzle is arranged in the oil filling hole, and the oil filling nozzle is communicated with the closed loop. Lubricating grease can be injected into the sliding structure through the oil nozzle by a user, and a lubricating effect is provided for rolling of the rolling bodies.

Furthermore, the lower side of the sliding foot is fixedly connected with a position encoder; the outer side of the side plate is connected with an oil receiving boss which is correspondingly arranged below the rolling body channel and above the position encoder. The position encoder provides position feedback for the motion of the linear motor module. The oil receiving boss receives grease seeped from the rolling body channel, and the grease is prevented from continuously flowing downwards to pollute the position encoder.

Furthermore, the end plate is connected with buffer rubber, and the buffer rubber is arranged in the cavity of the base. The buffer rubber plays a mechanical limiting role in the linear motor main body.

Furthermore, the rolling body is composed of a plurality of balls, the balls on the sliding rail in the groove channel are in two-point contact with the sliding rail, and an included angle of 45 degrees is formed between the stress direction of the contact point and the horizontal direction. The arrangement enables 4 balls with the cross section to be in 8 point contact with the groove channel to support the sliding block, and further improves the bearing capacity, rigidity and stability of the linear motor module in linear motion.

Furthermore, the bottom plate and the side plates are designed into a whole, and the cross section of the base is U-shaped; the linear motor main part includes the slip platen, and slip platen and mainboard integral type design. The slide block and the sliding bedplate are integrally designed, so that the slide block directly bears the load of the linear motor module, and an intermediate assembly link for connecting the slide block and the sliding bedplate is omitted; the base structure is more compact due to the integrated design of the bottom plate and the side plates. The arrangement eliminates the error accumulation of an intermediate mounting link and parts, improves the compactness and rigidity of the linear motor module, and ensures that the walking mechanical precision of the linear motor module is higher.

In the invention, the base adopts a U-shaped section bar base as a body, the slide rail is embedded into the outer side wall of the base in a blank form in an adhesion mode, the slide rail and the base are integrated into a whole, and then the whole is put into a high-precision grinding machine for grinding. This linear electric motor module puts the precision machining link of slide rail after it is integrated with the base, guarantees final machining precision, avoids the deformation and the error accumulation of intermediate link, lets whole slide rail reach the linear precision of micron order in the base.

The utility model has the advantages that: compared with the prior art, in the utility model, the sliding feet and the sliding structure are both positioned outside the base, the inner space of the cavity of the base is not occupied, the sliding block can be designed to have a length corresponding to the power structure in the linear motor main body, so that the linear motor module has a compact structure and also has larger bearing capacity and stronger stability; if the sliding structure of the linear motor module fails, the cover plate does not need to be disassembled and assembled, the sliding structure can be directly treated externally, is simple and convenient, and can prevent the inconvenience caused by the fact that parts in the sliding structure fall into the cavity of the base; the cover plate, the end plate and the base play a role in protecting parts inside the base cavity, foreign matters can be prevented from entering the linear motor module, and the stability of operation of the linear motor module is improved.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is an enlarged view of the sliding structure.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is an enlarged view of a portion a.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

referring to fig. 1-4, the present invention provides an externally embedded slot guide linear motor module, which comprises a linear motor main body 1, two sliding structures 2, a base 3, an end plate 4, and a cover plate 5. Base 3 includes bottom plate 31, two curb plates 32, and two curb plates 32 and bottom plate 31 fixed connection form base cavity 6, and both sides are connected around end plate 4 and the base 3, and 6 front sides, the rear side of base cavity are plugged up to end plate 4, and apron 5 sets up in 6 upsides of base cavity, and end plate 4 makes end plate 4 support apron 5 with apron 5 connection. The cover plate 5, the end plate 4 and the base 3 play a role in protecting parts inside the base cavity 6, foreign matters can be prevented from entering the linear motor module, and the stability of operation of the linear motor module is improved. The bottom plate 31 and the side plate 32 are designed in an integrated manner, and the cross section of the base 3 is shaped like a U. The base 3 is more compact in structure due to the integrated design of the bottom plate 31 and the side plates 32, the middle installation link and the error accumulation of parts are eliminated due to the arrangement, the compactness and the rigidity of the linear motor module are improved, and the walking mechanical precision of the linear motor module is higher.

The linear motor main body 1 comprises a sliding platen 11, a slider 12, a magnetic track 13 and a linear motor rotor 14, the slider 12 comprises a main plate 121 and two sliding feet 122, the sliding feet 122 are fixedly connected with the bottom of the main plate 121, the sliding feet 122 are arranged on the outer sides of the adjacent side plates 32, and each sliding foot 122 is connected with the outer side wall of the adjacent side plate 32 in a sliding mode through a sliding structure 2. The sliding platen 11 is designed integrally with the main plate 121. The two sliding structures 2 are parallel to each other and the plane formed by them is parallel to the bottom plate 31. The integral design of the sliding bedplate 11 and the main board 121 enables the sliding block 12 to directly bear the load of the linear motor module, and an intermediate assembly link for connecting the sliding block 12 and the sliding bedplate 11 is omitted. The parallel arrangement of the sliding feet 122 and the parallel arrangement of the sliding structure 2 enable the height of the overall structure of the linear motor module to be lower, thereby ensuring good stability and strong shock resistance of the linear motor module. Magnetic track 13 and linear motor active cell 14 are arranged in base cavity 6, main plate 121 is fixedly connected with linear motor active cell 14, and magnetic track 13 is installed on bottom plate 31 and corresponds to linear motor active cell 14 in position. The linear motor rotor 14 and the magnetic track 13 always keep a certain air gap without contact, so that the contact friction resistance between the linear motor rotor 14 and the magnetic track 13 is eliminated, the sensitivity and the follow-up property of the linear motor module are improved, the non-contact transmission force is realized, the mechanical friction loss is almost zero, the failure is few, and the reliability of the linear motor module is improved.

Each sliding structure 2 comprises a rolling body 21, a sliding rail 22 and a return device 23; the outer sides of the two side plates 32 are respectively provided with a groove channel 33 in an inward recessed manner, each sliding foot 122 is respectively provided with a groove 123 in an inward recessed manner at the position corresponding to the groove channel 33, the sliding rail 22 is arranged in the groove channel 33 and the groove 123 to form a rolling body channel (not shown), the return device 23 is embedded in the sliding foot 122, the return device 23 and the rolling body channel form a closed loop (not shown), and the rolling body 21 rolls in the closed loop. Set up slide rail 22 in the ditch channel way 33 and make slide rail 22 and base 3 integration be in the same place, make linear electric motor module compact structure, satisfy small-size, high accuracy demand, and save the material that is used for guaranteeing slide rail 22 straight line strength originally, save material cost. The rolling body 21, the return device 23 and the rolling body channel form a guide body, so that the linear motor module is guided to realize high-precision linear reciprocating motion, and the linear motor module also plays a role in supporting the sliding block 12 and bearing load. The sliding feet 122, the sliding structure 2, the groove channel 33 and the groove 123 are all arranged outside the base cavity 6, so that the inner space of the base cavity 6 is not occupied, and the length of the sliding block 12 can be designed correspondingly according to the structure of the linear motor rotor 14, so that the linear motor module has a compact structure and has high bearing capacity and high stability; the sliding structure 2 can be maintained without detaching the cover plate 5 when in failure, is convenient to maintain, and can prevent the rolling bodies 21 from falling into the base cavity 6 or being adsorbed on the magnetic track 13 to cause inconvenience.

An oil filling hole 124 is formed in the side surface of the slider 12, and an oil filling nozzle (not shown) is arranged in the oil filling hole 124 and communicated with the closed loop. A user can inject grease into the interior of the sliding structure 2 through the grease nipple to provide lubrication for the rolling of the rolling bodies 21.

The lower side of the sliding foot 122 is fixedly connected with a position encoder 7; an oil receiving boss 34 is connected to the outer side of the side plate 32, and the oil receiving boss 34 is correspondingly arranged below the rolling element channel and above the position encoder 7. A position encoder 7 provides position feedback for the linear motor module motion. The oil receiving boss 34 receives grease seeping from the rolling element channel, and prevents the grease from flowing down to pollute the position encoder 7.

The end plate 4 is connected with a buffer rubber 8, and the buffer rubber 8 is arranged in the base cavity 6. The cushion rubber 8 plays a mechanical limiting role in the linear motor body 1.

The rolling body 21 is composed of a plurality of balls, the balls on the sliding rail 22 in the groove channel 33 are in two-point contact with the sliding rail 22, and an included angle between the stress direction of the contact point and the horizontal direction is 45 degrees. The arrangement makes 4 balls with cross sections in 8 point contact with the groove channel 33 to support the sliding block 12, thereby improving the bearing capacity, rigidity and stability of the linear motor module in linear motion.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The utility model provides a linear electric motor module of outer embedded groove guide rail which characterized in that: including the linear electric motor main part, sliding structure, a pedestal, the end plate, the apron, the linear electric motor main part includes the slider, the base includes the bottom plate, two curb plates form the base cavity with bottom plate fixed connection, the end plate is connected with both sides around the base, the base cavity front side is plugged up to the end plate, the rear side, the apron sets up in the base cavity upside, the end plate makes the end plate support apron with the cover connection, the slider includes the mainboard, the sliding foot, sliding foot and mainboard bottom fixed connection, the sliding foot sets up the outside at adjacent curb plate, the sliding foot passes through sliding structure and the lateral wall sliding connection of adjacent curb plate.

2. The linear motor module of an externally-embedded groove guide rail according to claim 1, wherein: the slider includes two sliding legs, and two sliding legs are parallel to each other, and every sliding leg is through a sliding construction and the lateral wall sliding connection of adjacent curb plate respectively, and two sliding construction are parallel to each other and the plane of constituteing is parallel with the bottom plate.

3. The linear motor module of an externally-embedded groove guide rail according to claim 1, wherein: the linear motor main part still includes magnetic track, linear motor active cell, and magnetic track, linear motor active cell arrange in the base cavity, mainboard and linear motor active cell fixed connection, and the magnetic track is installed on the bottom plate and is corresponded with linear motor active cell position.

4. The linear motor module of an externally-embedded groove guide rail according to claim 3, wherein: each sliding structure comprises a rolling body, a sliding rail and a reflux device; the outer sides of the two side plates are respectively provided with groove channels which are inwards recessed, each sliding foot is respectively provided with a groove which is inwards recessed at the position corresponding to the groove channel, the sliding rails are arranged in the groove channels and the grooves to form rolling body channels, the backflow device is embedded inside the sliding foot, the backflow device and the rolling body channels form a closed loop, and the rolling bodies roll in the closed loop.

5. The linear motor module of an externally-embedded groove guide rail according to claim 4, wherein: an oil filling hole is formed in the sliding block, an oil filling nozzle is arranged in the oil filling hole, and the oil filling nozzle is communicated with the closed loop.

6. The linear motor module of an externally-embedded groove guide rail according to claim 1, wherein: the lower side of the sliding foot is fixedly connected with a position encoder; the outer side of the side plate is connected with an oil receiving boss which is correspondingly arranged below the rolling body channel and above the position encoder.

7. The linear motor module of an externally-embedded groove guide rail according to claim 1, wherein: the end plate is connected with a buffer rubber which is arranged in the cavity of the base.

8. The linear motor module of an externally-embedded groove guide rail according to claim 4, wherein: the rolling body is composed of a plurality of balls, the balls on the sliding rail in the groove channel are in two-point contact with the sliding rail, and the included angle between the stress direction of the contact point and the horizontal direction is 45 degrees.

9. The linear motor module of an externally-embedded groove guide rail according to claim 1, wherein: the bottom plate and the side plate are integrally designed, and the cross section of the base is U-shaped; the linear motor main part includes the slip platen, and slip platen and mainboard integral type design.

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