CN219458879U - Magnetic spring and motor module - Google Patents

Abstract

The utility model discloses a magnetic spring and a linear module, wherein the magnetic spring comprises a magnetic shaft and a shaft sleeve, the magnetic shaft can magnetically adsorb the shaft sleeve, the shaft sleeve is sleeved on the magnetic shaft in a sliding way, the shaft sleeve is provided with a groove along the axial direction, and the shaft sleeve can rotate around the magnetic shaft to adjust the relative position between the groove and the magnetic shaft. Through seting up the recess on magnetic spring's axle sleeve, the volume of axle sleeve in recess department will be inconsistent with axle sleeve rest to through the relative position between adjustment recess and the magnetic axis, can change the magnetic attraction of magnetic axis to axle sleeve in recess department, and then make the holistic magnetic attraction of magnetic axis to axle sleeve and the magnitude of the required power under the magnetic spring actual application scene unanimous.

Description

Magnetic spring and motor module

Technical Field

The utility model relates to the technical field of linear motors, in particular to a magnetic spring and a motor module.

Background

When the linear motor is used vertically, the additional load caused by the gravity of the linear motor can be compensated by providing a constant pushing force or pulling force in the whole travel range of the linear motor by arranging a magnetic spring without an external retaining device. However, since the magnetic spring outputs a constant force, when the constant force is inconsistent with the additional load of the linear motor, the magnetic spring of the corresponding specification needs to be replaced, increasing the installation cost of the linear motor.

Disclosure of Invention

In view of the shortcomings of the prior art, the application provides a magnetic spring and a linear motor, wherein the constant force output by the magnetic spring can be adjusted to be consistent with the load gravity of the linear motor.

The embodiment adopts the following technical scheme:

the utility model provides a magnetic spring, includes magnetic axis and axle sleeve, magnetic axis can magnetic attraction the axle sleeve, the axle sleeve slip cap is located on the magnetic axis, the axle sleeve has seted up flutedly along the axial, the axle sleeve can wind the magnetic axis rotates, in order to adjust the recess with relative position between the magnetic axis.

Further, in the magnetic spring, the number of the grooves is two, and the grooves are symmetrically arranged on two sides of the shaft sleeve.

Further, in the magnetic spring, the groove is a straight groove and penetrates through the shaft sleeve.

Further, in the magnetic spring, the magnetic spring further comprises a fixing seat, a fixing hole is formed in the fixing seat, and the shaft sleeve is arranged in the fixing hole.

Further, in the magnetic spring, the fixing seat comprises a first fixing portion and a second fixing portion which are arranged at intervals, a portion of the fixing hole is arranged on the first fixing portion, another portion of the fixing hole is arranged on the second fixing portion, and the distance between the first fixing portion and the second fixing portion is adjustable.

Further, in the magnetic spring, the fixing base further includes a screw passing through the first fixing portion and being screwed with the second fixing portion.

Further, in the magnetic spring, the magnetic shaft comprises a permanent magnet, a shaft body and two end covers, the shaft body is of a hollow structure, the permanent magnet is arranged in the shaft body, and the two end covers are arranged at two ends of the shaft body.

Further, in the magnetic spring, the magnetic shaft further comprises a fixing glue, the fixing glue is arranged in the shaft body, and the permanent magnet is fixedly connected with the shaft body through the fixing glue.

Further, in the magnetic spring, a positioning surface is formed on the side surface of at least one end cover, and the positioning surface is a plane.

Furthermore, in the magnetic spring, the number of the positioning surfaces is two, and the positioning surfaces are symmetrically arranged on two sides of the end cover.

The motor module comprises a linear motor and the magnetic spring, wherein the magnetic spring is arranged in any one of the above, the shaft sleeve is connected with a rotor of the linear motor, and the magnetic shaft is connected with a base of the linear motor.

Compared with the prior art, the application provides a magnetic spring and motor module, through seting up the recess on magnetic spring's axle sleeve, the volume of axle sleeve in recess department will not be unanimous with rest part to through adjusting the relative position between recess and the magnetic axis, can change the magnetic attraction of magnetic axis to axle sleeve in recess department, and then make the holistic magnetic attraction of magnetic axis to axle sleeve and the magnitude of the required power under the magnetic spring actual application scene unanimous.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of a magnetic spring provided in the present application.

Fig. 2 is a schematic structural view of the shaft sleeve and the fixing base in the magnetic spring shown in fig. 1.

Fig. 3 is a schematic structural view of a magnetic shaft in the magnetic spring shown in fig. 1.

Fig. 4 is a schematic overall structure of a specific embodiment of a motor module provided in the present application.

Wherein, 10, magnetic axis; 11. a shaft body; 12. an end cap; 121. a threaded hole; 122. a positioning surface; 20. a shaft sleeve; 21. a groove; 30. a fixing seat; 31. a fixing hole; 32. a first fixing portion; 33. a second fixing portion; 100. a magnetic spring; 200. a linear motor; 210. a mover connecting plate; 220. a base.

Detailed Description

In order to make the objects, technical solutions and effects of the present application clearer and more specific, the present application will be further described in detail below with reference to the accompanying drawings and examples. It is to be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the present application, as elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

It should be noted that when a meta-structure is referred to as being "fixed" or "disposed" on another meta-structure, it may be directly on the other meta-structure or indirectly on the other meta-structure. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation.

Referring to fig. 1, the magnetic spring provided in the present application includes a magnetic shaft 10 and a shaft sleeve 20, the magnetic shaft 10 can magnetically adsorb the shaft sleeve 20, the shaft sleeve 20 is slidably sleeved on the magnetic shaft 10, the shaft sleeve 20 is axially provided with a groove 21, and the shaft sleeve 20 can rotate around the magnetic shaft 10 to adjust the relative position between the groove 21 and the magnetic shaft 10.

The magnetic shaft 10 may be defined as a stator of a magnetic spring, the sleeve 20 may be defined as a mover of the magnetic spring, and the magnetic attraction force generated by the relative movement of the mover of the magnetic spring and the stator may be kept constant, i.e. constant force, in a suitable stroke. And, a specific range of travel for maintaining a constant force can be determined by performing a simulation design or an actual test through simulation software, thereby determining a movable distance of the sleeve 20.

By providing the recess 21 in the sleeve 20, the volume of the sleeve 20 will not be the same as the rest, and at this time, by adjusting the relative position between the recess 21 and the magnetic shaft 10, the magnetic attraction of the magnetic shaft 10 to the sleeve 20 at the recess 21 can be changed, thereby changing the magnitude of the constant force.

For example, when the magnetic shaft 10 fixes and rotates the sleeve 20 such that the magnetic flux passing through the recess 21 increases, the magnetic attraction force of the magnetic shaft 10 to the sleeve 20 decreases; when the magnetic shaft 10 fixes and rotates the sleeve 20 such that the magnetic flux passing through the recess 21 decreases, the magnetic attraction force of the magnetic shaft 10 to the sleeve 20 increases.

Therefore, the angle of the shaft sleeve 20 can be rotated to change the magnetic attraction force of the magnetic shaft 10 to the shaft sleeve 20, and the constant force generated by the magnetic shaft 10 to the shaft sleeve 20 can be adjusted within a certain travel range, so that the constant force is consistent with the constant force required by the actual application scene of the magnetic spring.

In some embodiments, referring to fig. 2, the number of the grooves 21 may be two, and the two grooves 21 are the same in size and symmetrically disposed on two sides of the sleeve 20 to ensure that the stress on two sides of the sleeve 20 is consistent.

In addition, the groove 21 can be a straight groove and penetrates through the shaft sleeve 20, so that the groove 21 is formed by processing the shaft sleeve 20 conveniently, and the constant force adjustment is easier.

Specifically, the shaft sleeve 20 may be made of stainless steel or other magnetic metals and alloys, and according to actual requirements, through simulation design or actual test by simulation software, two grooves 21 with suitable width, length and depth are formed on the surface of the shaft sleeve 20 along the axial direction, so as to adjust the magnetic attraction force of the magnetic shaft 10 on the shaft sleeve 20 at the grooves 21.

In some embodiments, referring to fig. 3, the magnetic shaft 10 may include a permanent magnet (not shown), a shaft body 11 and two end caps 12, wherein the two ends of the shaft body 11 are open, the interior is a hollow structure, the permanent magnet may be disposed in the shaft body 11 from the openings at the two ends of the shaft body 11, and the two end caps 12 may be disposed at the two ends of the shaft body 11 to close the openings at the two ends of the shaft body 11.

The permanent magnet can be made of neodymium iron boron materials, and according to actual requirements, simulation design or actual test is carried out through simulation software, and proper outer diameter and length are selected. The shaft body 11 can be made of stainless steel pipes or other magnetic metals and alloys, and can be subjected to simulation design or actual test by simulation software according to actual requirements, and proper length, inner diameter and outer diameter are selected. The end cover 12 can also be made of stainless steel materials, and can be subjected to simulation design or actual test by simulation software according to actual requirements, and the proper outer diameter and length are selected.

Also, threaded holes 121 may be provided in both end caps 12 to secure the magnetic shaft 10 to an external mechanism when in use.

Further, the magnetic shaft 10 further comprises a fixing glue, the fixing glue is arranged in the shaft body 11, and the permanent magnet is fixedly connected with the shaft body 11 through the fixing glue.

The fixing glue can be epoxy pouring sealant or other glue. After the permanent magnet is installed in the shaft body 11, epoxy pouring sealant can be used for filling, so that the permanent magnet is prevented from shifting in the shaft body 11.

In some embodiments, the side of at least one end cap 12 of the two end caps 12 forms a locating surface 122, the locating surface 122 being planar.

The purpose of the locating surface 122 is to determine the angle of the magnetic axis 10. Specifically, the locating surface 122 may be formed by a lateral axial cut-out of the end cap 12. In addition, in the process of fixing the magnetic shaft 10 through the threaded hole, the magnetic shaft 10 can be fixed through the positioning surface 122, for example, an operator can clamp the end cover 12 through a clamp conveniently, and the magnetic shaft 10 is prevented from being angularly deviated in the installation process.

Further, the number of the positioning surfaces 122 may be two, and symmetrically disposed on two sides of the end cover 12, so that two sides of the end cover 12 can be used for positioning.

In some embodiments, referring to fig. 1 and 2, the magnetic spring further includes a fixing base 30, a fixing hole 31 is formed on the fixing base 30, and the sleeve 20 is disposed in the fixing hole 31.

The fixing base 30 can fix the shaft sleeve 20, determine the positions of the shaft sleeve 20 and the groove 21, and further determine the relative positions of the shaft sleeve 20 and the groove 21 and the magnetic shaft 10.

Further, the fixing base 30 includes a first fixing portion 32 and a second fixing portion 33 disposed at intervals, a portion of the fixing hole 31 is formed on the first fixing portion 32, another portion of the fixing hole 31 is formed on the second fixing portion 33, and a distance between the first fixing portion 32 and the second fixing portion 33 is adjustable.

The shaft sleeve 20 in the fixing hole 31 can be loosened by adjusting the distance between the second fixing parts 33 of the first fixing parts 32, the shaft sleeve 20 can be conveniently rotated, the position of the groove 21 is adjusted, and the distance between the second fixing parts 33 of the first fixing parts 32 can be readjusted after the adjustment is completed, so that the shaft sleeve 20 in the fixing hole 31 is clamped and fixed again.

Specifically, the fixing base 30 further includes a screw (not shown) passing through the first fixing portion 32 and screwed with the second fixing portion 33. By turning the screw, the depth of the screw extending into the second fixing portion 33 can be adjusted, thereby adjusting the distance between the first fixing portion 32 and the second fixing portion 33.

Also, the number of screws may be set to be plural, for example, two, four, passing through the first fixing portion 32 from different positions and being screwed with the second fixing portion 33, respectively, so that the boss 20 can be uniformly clamped by the first fixing portion 32 and the second fixing portion 33.

In addition, during the design of the magnetic shaft 10 and the sleeve 20, the mechanical air gap between the two is generally 0.8mm to 1.2mm on one side. In actual assembly, the magnetic shaft 10 and the shaft sleeve 20 need to be coaxially rotated. In application, the relative positions of the magnetic shaft 10 and the shaft sleeve 20 need to be adjusted in advance according to the actual time travel requirement, and the relative positions of the grooves 21 on the shaft sleeve 20 and the magnetic shaft 10 can be correspondingly adjusted according to the change of the time travel requirement, so that the magnetic attraction between the magnetic shaft 10 and the shaft sleeve 20 can be adjusted.

Referring to fig. 4, the present application further discloses a motor module, including a linear motor 200 and the magnetic spring 100, where the shaft sleeve 20 is connected to a mover of the linear motor 200, and the magnetic shaft 10 is connected to a base 220 of the linear motor 200.

The linear motor 200 includes a base 220, a stator fixed to the base 220, and a mover slidably disposed on the base 220. Specifically, a mover connection plate 210 may be disposed on a mover of the linear motor 200, the shaft sleeve 20 of the magnetic spring 100 is fixed on the mover connection plate 210 through the fixing seat 30, and the magnetic shaft 10 of the magnetic spring 100 is fixed on the bases 220 at two ends of the linear motor 200 through the end caps 12 at two ends.

When the moving direction of the mover of the linear motor 200 is along the Z-axis direction, the mover of the linear motor 200 may drive the shaft sleeve 20 to move together, and the attraction force generated by the relative movement of the magnetic shaft 10 and the shaft sleeve 20 counteracts the load gravity of the linear motor 200. In addition, the constant force fluctuation of the magnetic spring 100 output in the travel range is small, the application demand field with high precision and high response speed can be achieved, and the magnetic spring can be widely applied to industrial occasions such as medical equipment, industrial automation, automobile industry, machine tools, numerical control systems, damping systems and the like.

It will be understood that equivalents and modifications will occur to persons skilled in the art and may be made in accordance with the present utility model and its application and spirit, and all such modifications and substitutions are intended to be included within the scope of the following claims.

Claims (11)

1. The magnetic spring is characterized by comprising a magnetic shaft and a shaft sleeve, wherein the magnetic shaft can magnetically adsorb the shaft sleeve, the shaft sleeve is slidably sleeved on the magnetic shaft, the shaft sleeve is axially provided with a groove, and the shaft sleeve can rotate around the magnetic shaft so as to adjust the relative position between the groove and the magnetic shaft.

2. The magnetic spring of claim 1, wherein the number of grooves is two, symmetrically disposed on both sides of the sleeve.

3. The magnetic spring of claim 1, wherein the recess is a straight slot and extends through the sleeve.

4. The magnetic spring of claim 1, further comprising a fixing base, wherein a fixing hole is formed in the fixing base, and the shaft sleeve is disposed in the fixing hole.

5. The magnetic spring of claim 4, wherein the fixing base includes a first fixing portion and a second fixing portion disposed at intervals, a portion of the fixing hole is disposed on the first fixing portion, another portion of the fixing hole is disposed on the second fixing portion, and a distance between the first fixing portion and the second fixing portion is adjustable.

6. The magnetic spring of claim 5, wherein the anchor further comprises a screw that passes through the first anchor portion and is threadably coupled to the second anchor portion.

7. The magnetic spring of claim 1, wherein the magnetic shaft comprises a permanent magnet, a shaft body and two end caps, the shaft body is of a hollow structure, the permanent magnet is arranged in the shaft body, and the two end caps are arranged at two ends of the shaft body.

8. The magnetic spring of claim 7, wherein the magnetic shaft further comprises a fixing glue disposed within the shaft body, the permanent magnet being fixedly coupled to the shaft body by the fixing glue.

9. The magnetic spring of claim 7, wherein the side of at least one of the end caps forms a locating surface, the locating surface being planar.

10. The magnetic spring of claim 9, wherein the number of positioning surfaces is two, symmetrically disposed on both sides of the end cap.

11. A motor module comprising a linear motor and a magnetic spring as claimed in any one of claims 1 to 10, wherein the sleeve is connected to a mover of the linear motor and the magnetic shaft is connected to a base of the linear motor.