CN220874396U - Magnetomotive Z-axis linear motor module - Google Patents

Abstract

The utility model discloses a magnetomotive Z-axis linear motor module, and belongs to the field of linear motors. Including bottom plate, slip platen, slide mechanism, be provided with the linear motor active cell in the bottom plate, the laminating of the side of slip platen is provided with the magnetic track, the magnetic track sets up relatively with the linear motor active cell, slide mechanism is embedded in the bottom plate, and the slip platen passes through slide mechanism in Z axle direction and bottom plate sliding connection, the spring arm-tie is installed to the one end of bottom plate, the slip platen is keeping away from the one end of spring arm-tie is provided with the spring fixed plate, be connected with the spring between spring arm-tie and the spring fixed plate. The working principle of the extension spring can be utilized, the load can be stably balanced in the vertical application occasion, and free falling collision is avoided in the power failure. Meanwhile, the module has excellent working performance, stable structure, high precision and good economical efficiency, and is convenient to use and popularize.

Description

Magnetomotive Z-axis linear motor module

Technical Field

The utility model belongs to the field of linear motors, and particularly relates to a magnetomotive Z-axis linear motor module.

Background

The direct drive motor is a motion control structure that omits all intermediate mechanisms, and directly transmits force/torque from a power source to a load through linear guide rails or rolling bearing guidance. By eliminating mechanical drive components (ball screw assembly, gears, racks, timing belts, gearboxes, etc.), the drive structure eliminates reverse play, compliance, wear and other problems associated with mechanical drive. The direct drive motor includes a direct drive linear motor (DDL) and a direct drive torque motor (DDR).

A direct drive linear motor (DDL) is one type of direct drive motor. By expanding the closed magnetic field into an open magnetic field, the electrical energy is directly converted into mechanical energy for linear motion without any intermediate conversion mechanism transmission. The linear motor may be constructed by radially sectioning a single rotary motor and linearly expanding the circumference of the motor.

The linear motor module consists of a bottom plate, a guide mechanism (linear guide rail and linear guide sleeve), a power mechanism (linear motor rotor and linear motor magnetic track), position feedback (optical/magnetic grid encoder assembly, hall and photoelectric sensor), a protection assembly (cover plate and limiting block) and the like. The linear motor outputs power to directly act on the load through guide rail guidance, and the position feedback realizes closed-loop control. The whole structure can realize high-precision and high-response positioning. Compared with a rotating motor, the rotary motor has the advantages of simple structure, high positioning accuracy, high reaction speed, high sensitivity, good follow-up performance, safe and reliable work, long service life, unrestricted stroke length, independent operation of multiple movers and the like.

The linear motor module is structurally simplified and high in accuracy in comparison with the screw rod module and the synchronous belt module. However, due to the advantage that the power of the linear motor directly acts on the load, the linear motor and the magnetic track must be in the stroke range of the module, so that the motor can generate a stable closed-loop magnetic field to provide stable thrust. Therefore, the linear motor module cannot be small in size and flat in structure. In addition, in vertical application, the linear motor does not have a self-locking function. So its use is limited (the load can be free falling when the motor is de-energized). If the linear motor needs to be applied to a vertical occasion, a self-locking device or a gravity balance system needs to be added. To prevent the load from striking the event when the motor is abnormally powered off.

At present, the following schemes are adopted for balancing gravity under the condition of vertical use of the linear motor:

1. The guide rail self-locking device is added, namely the guide rail clamp is used, and when the equipment is powered off, the guide rail clamp is closed to hold the guide rail, so that the module has a self-locking function. However, rail clamps are costly and require matching rails of the corresponding specifications. And when the module motor moves vertically upwards by using the guide rail clamp, the motor also needs to balance the gravity of the load to do work. The motor with corresponding thrust is required to be added to meet the working condition requirement. The volume and weight of the module are increased. In addition, rail clamps require the use of a separate control source to operate. The system has no signal feedback during operation, and can not generate a closed loop to enable the system to judge whether the system has the state of the band-type brake.

2. Gravity balance system:

Air bar balance: the dead weight of the load is balanced by the cylinder generating a vertically upward force. The travel of the device can reach 500mm. But the cylinder occupies a larger space, increasing the volume of the module. And the thrust generated by the air cylinder can not meet the high-speed and high-acceleration motion.

Magnetic force spring: the existing magnetic spring has the advantages of high precision, high response and the like when applied to a Z-axis occasion. But is costly due to its price. The current application occasions are not promoted in a large range.

Disclosure of utility model

In order to solve the above problems, a primary object of the present utility model is to provide a magnetomotive Z-axis linear motor module, which can stably balance load in a vertical application situation by using a working principle of an extension spring, and avoid free falling collision in power failure;

The utility model further aims to provide the Z-axis linear motor module with the load balancing structure, which has the advantages of excellent working performance, stable structure, high precision and good economy, and is convenient to use and popularize.

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

The utility model provides a magnetic-driven Z-axis linear motor module, which comprises a bottom plate, a sliding bedplate and a sliding mechanism, wherein a linear motor rotor is arranged in the bottom plate, a magnetic track is attached to the side surface of the sliding bedplate, the magnetic track is opposite to the linear motor rotor, the sliding mechanism is embedded in the bottom plate, the sliding bedplate is in sliding connection with the bottom plate in the Z-axis direction through the sliding mechanism, a spring pull plate is arranged at one end of the bottom plate, a spring fixing plate is arranged at one end of the sliding bedplate far away from the spring pull plate, and a spring is connected between the spring pull plate and the spring fixing plate. In the utility model, one end of the spring is fixed on the bottom plate, and the other end of the spring slides along with the sliding bedplate, so that the load is stably balanced in the vertical application occasion by utilizing the working principle of spring stretching, and the impact force generated by free falling of the linear motor rotor is avoided.

Further, the bottom plate is of a 匚 -type structure, a 匚 -type sliding cavity can be formed in the bottom plate, the linear motor rotor is fixed in the sliding cavity, and the sliding bedplate and the magnetic track slide relative to the sliding cavity. In the application, the motor coil with the iron core structure is embedded into the bottom plate and then integrally filled with glue to form the linear motor rotor, and the linear motor rotor and the magnetic track form a closed magnetic field.

Further, the upper inner side and the lower inner side of the sliding cavity are provided with bosses, the bosses are internally provided with mounting grooves, the sliding mechanism comprises steel rails and a reflux device, the steel rails and the reflux device slide relatively, the steel rails are embedded into the upper side and the lower side of the sliding bedplate, and the reflux device is embedded into the mounting grooves. According to the application, the balls in the reflux device can roll on the steel rail, so that the movable platen slides relative to the bottom plate, the embedded steel rail and the reflux device can not only reduce the occupied volume of the module, but also protect the sliding mechanism, and the stability of the structure is improved. It should be noted that, the sliding mechanism composed of the reflux device and the steel rail belongs to the prior art, and the specific structure is not required to be disclosed in the application.

Further, the upper end and the lower end of the sliding bedplate are provided with anti-collision blocks, and normal travel of the module is ensured by collision with the bottom plate in movement, so that the magnetic track is prevented from running out of the motor induction area.

Further, one end of the sliding bedplate is further provided with a load adapter plate, and load installation can be achieved through the load adapter plate.

Further, a reading head support is arranged on the side wall of the boss, a reading head is arranged on the reading head support, and a grating coding ruler matched with the reading head is arranged on the sliding bedplate. In the application, the grating coding ruler and the coding reading head can feed back the position of the sliding platen through cooperation, so that the precision is ensured.

Further, a plurality of photoelectric switches are further arranged on the side wall of the boss, and shielding sheets matched with the photoelectric switches are further arranged on the sliding bedplate. The position of the sliding bedplate is fed back through the matching of the photoelectric switch and the shielding piece.

Further, the bottom of the sliding bedplate is also provided with an oil receiving block, an oil receiving groove is arranged in the oil receiving block, and the oil receiving groove is connected to the tail end of the steel rail. Lubricating oil overflowed from the steel rail can drip into the oil receiving groove below, so that grease is prevented from overflowing.

Further, the upper end of the sliding cavity is also provided with an upper shell, one side of the sliding cavity, which is far away from the bottom plate, is also provided with a side shell, and the upper shell, the side shell and the bottom plate are enclosed to form the sliding cavity with an opening at the lower end only.

The utility model has the advantages that compared with the prior art:

The working performance is excellent: the rotor is powered by a linear motor, the guide rail provides a guiding function, and the grating component forms closed-loop position feedback, so that the rotor has the advantages of high precision, high response, high speed and the like; by utilizing the working principle of the extension spring, the load can be stably balanced in the vertical application occasion, and free falling collision is avoided in the power failure.

Stable in structure, the precision is high: the motor adopts an integrated glue filling mode, so that the size of the module is reduced, the mass of the whole motion assembly is reduced, and the motion response of the module is faster; the embedded guide rail is adopted, so that the module has smaller volume, the steel rail and the motor are assembled and then processed on the upper grinding machine, and the rigidity of the module is enhanced, and meanwhile, the precision of the module is ensured; the oil receiving groove is arranged below the steel rail, so that oil stains can be prevented from overflowing.

The economy is good: the embedded guide rail is adopted by the module, all mechanical precision can be finished simultaneously during machining, the guide rail assembly process is omitted, and meanwhile, compared with a standard guide rail on the market, the embedded guide rail is completely and autonomously machined, so that large-scale batch production can be realized; by independently selecting spring pull plates with different lengths and matching standard springs, the vertical load-adjustable spring can be matched with the application of different loads to vertical occasions.

Drawings

Fig. 1 is an isometric view of the present embodiment.

Fig. 2 is a schematic view of the structure of the hidden upper case and the side case of the present embodiment.

Fig. 3 is a side view of the present embodiment.

Fig. 4 is an exploded view at A-A in fig. 3.

Fig. 5 is an exploded view of the present embodiment.

Fig. 6 is a schematic structural diagram of an oil receiving block according to this embodiment.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In order to achieve the above object, the technical solution of this embodiment is as follows:

Referring to fig. 1-6, the embodiment provides a magnetomotive Z-axis linear motor module, which comprises a base plate 1, a sliding bedplate 2 and a sliding mechanism 3, wherein a linear motor rotor 4 is arranged in the base plate 1, a magnetic track 5 is arranged on the side surface of the sliding bedplate 2 in a laminating manner, the magnetic track 5 is arranged opposite to the linear motor rotor 4, the sliding mechanism 3 is embedded in the base plate 1, the sliding bedplate 2 is in sliding connection with the base plate 1 in the Z-axis direction through the sliding mechanism 3, a spring pull plate 6 is arranged at one end of the base plate 1, a spring fixing plate 7 is arranged at one end, far away from the spring pull plate 6, of the sliding bedplate 2, and a spring 8 is connected between the spring pull plate 6 and the spring fixing plate 7. In the application, one end of the spring 8 is fixed on the bottom plate 1, and the other end slides along with the sliding bedplate 2, so that the load is stably balanced in the vertical application occasion by utilizing the working principle of stretching the spring 8, and the impact force generated by the free falling of the linear motor rotor 4 is avoided, and the impact is generated.

Further, the base plate 1 has a 匚 -type structure, a 匚 -type sliding cavity 9 can be formed inside, the linear motor rotor 4 is fixed in the sliding cavity 9, and the sliding platen 2, the magnetic track 5 and the sliding cavity 9 slide relatively. In the application, the motor coil with the iron core structure is embedded into the bottom plate 1 and then integrally filled with glue to form the linear motor rotor 4, the linear motor rotor 4 and the magnetic track 5 form a closed magnetic field, and the magnetic track 5 can move up and down under the action of magnetic force due to the fact that the motor rotor is fixed along with the base, so that the whole structure can be small in volume, light in weight and flat in structure, and has high response and high speed performance.

Further, the upper and lower inner sides of the sliding cavity 9 are provided with bosses 11, the bosses 11 are internally provided with mounting grooves 12, the sliding mechanism 3 comprises steel rails 31 and a reflux device 32, the steel rails 31 and the reflux device 32 slide relatively, the steel rails 31 are embedded into the upper and lower sides of the sliding bedplate 2, and the reflux device 32 is embedded into the mounting grooves 12. In the application, the balls in the reflux device 32 can roll on the steel rail 31, so that the movable platen slides relative to the bottom plate 1, the embedded steel rail 31 and reflux device 32 can reduce the occupied volume of the module, protect the sliding mechanism 3 and improve the stability of the structure. The sliding mechanism 3 composed of the reflux device 32 and the rail 31 belongs to the prior art, and the specific structure thereof is not necessary to be disclosed in the present application.

Further, the upper and lower ends of the sliding platen 2 are provided with anti-collision blocks 21, which strike the bottom plate 1 during movement to ensure the normal travel of the module, and prevent the magnetic track 5 from exiting the motor sensing area.

Further, one end of the sliding platen 2 is further provided with a load transfer plate 22, and load installation can be achieved through the load transfer plate 22.

Further, a reading head bracket 13 is installed on the side wall of the boss 11, a reading head 14 is installed on the reading head bracket 13, and a grating coding ruler (not shown) matched with the reading head 14 is arranged on the sliding platen 2. In the application, the grating coding ruler and the coding reading head can feed back the position of the sliding platen 2 through cooperation, so that the precision is ensured.

Further, a plurality of photoelectric switches 15 are also arranged on the side wall of the boss 11, and a shielding sheet 23 matched with the photoelectric switches 15 is also arranged on the sliding bedplate 2. The position of the slide platen 2 is fed back by the photoelectric switch 15 in cooperation with the shielding piece 23.

Further, the bottom of the sliding platen 2 is also provided with an oil receiving block 24, an oil receiving groove 25 is arranged in the oil receiving block 24, and the oil receiving groove 25 is connected to the tail end of the steel rail 31. The lubricating oil overflowed from the rail 31 can drip into the oil receiving groove 25 below, and the oil can be prevented from overflowing.

Further, an upper shell 16 is further installed at the upper end of the sliding cavity 9, a side shell 17 is further installed at one side, far away from the bottom plate 1, of the sliding cavity 9, and the upper shell 16, the side shell 17 and the bottom plate 1 enclose to form the sliding cavity 9 with an opening at the lower end.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The utility model provides a magnetic drive formula Z axle linear electric motor module, its characterized in that, includes bottom plate, slip platen, slide mechanism, be provided with the linear electric motor active cell in the bottom plate, the laminating of the side of slip platen is provided with the magnetic track, the magnetic track sets up with the linear electric motor active cell relatively, slide mechanism is embedded in the bottom plate, and the slip platen passes through slide mechanism at Z axle direction and bottom plate sliding connection, the spring arm-tie is installed to the one end of bottom plate, the slip platen is keeping away from the one end of spring arm-tie is provided with the spring fixed plate, be connected with the spring between spring arm-tie and the spring fixed plate.

2. The magnetomotive Z-axis linear motor module according to claim 1 wherein the base plate has a '匚' type structure capable of forming a '匚' type sliding cavity therein, the linear motor mover is fixed in the sliding cavity, and the sliding platen, the magnetic track and the sliding cavity slide relatively.

3. The magnetomotive Z-axis linear motor module according to claim 2 wherein bosses are arranged on the upper and lower inner sides of the sliding cavity, mounting grooves are formed in the bosses, the sliding mechanism comprises steel rails and a reflux device, the steel rails and the reflux device slide relatively, the steel rails are embedded into the upper and lower sides of the sliding platen, and the reflux device is embedded into the mounting grooves.

4. The magnetomotive Z-axis linear motor module according to claim 1 wherein the upper and lower end portions of the sliding platen are provided with anti-collision blocks.

5. The magnetomotive Z-axis linear motor module according to claim 1 wherein one end of the sliding platen is further provided with a load adapter plate.

6. A magnetomotive Z-axis linear motor module according to claim 3 wherein a readhead support is mounted on the side wall of the boss, a readhead is mounted on the readhead support, and a grating code scale is provided on the sliding platen in cooperation with the readhead.

7. A magnetomotive Z-axis linear motor module according to claim 3 wherein a plurality of photoelectric switches are further mounted on the side walls of the boss, and a shielding sheet is further provided on the sliding platen to cooperate with the photoelectric switches.

8. A magnetomotive Z-axis linear motor module according to claim 3 wherein the bottom of the sliding platen is further provided with an oil receiving block, an oil receiving groove is provided in the oil receiving block, and the oil receiving groove is engaged at the end of the rail.

9. The magnetomotive Z-axis linear motor module according to claim 2 wherein an upper shell is further mounted at the upper end of the sliding cavity, a side shell is further mounted at the side of the sliding cavity away from the bottom plate, and the upper shell, the side shell and the bottom plate enclose the sliding cavity with only a lower end opening.