A magnetostrictive drive mechanism

Abstract

The invention belongs to the technical field of magnetostrictive driving, and specifically relates to a magnetostrictive driving mechanism, comprising a rectangular track, an iron bar is arranged on the inner wall of the lower side of the rectangular track, two slide bars are slidably equipped with a mounting seat, a magnetostrictive rod is arranged in a placement groove, a coil is arranged in an inner cavity, a sleeve is arranged in the groove, a circular baffle is fixedly connected to the magnetostrictive rod, a support seat which is sleeved with the two slide bars is fixedly connected to the lower side of the circular baffle, a stabilizing component is arranged between the support seat and the mounting seat, air pipes are respectively arranged through a shell and the circular baffle at both ends of an air vent, and a supporting component matching the two air pipes is arranged on the rectangular track. The driving mechanism is convenient for workers to dissipate heat from the magnetostrictive rod, and the shell and the support seat are limited by the mutual cooperation of a first electromagnet and a second electromagnet, and compared with a traditional moving method by inertia, the moving distance is larger and the applicability is wider.

Description

Technical Field

[0001] The present invention belongs to the technical field of magnetostrictive drive, and particularly relates to a magnetostrictive drive mechanism. Background Art

[0002] Magnetostriction refers to a ferromagnetic material that, when magnetized in a magnetic field, elongates or shortens in the magnetization direction, and whose size changes significantly when the current passing through the coil changes or the distance from the magnet changes. It is usually called a ferromagnetic magnetostrictive material. Its size change is much larger than that of magnetostrictive materials such as ferrite, and the energy generated is also large, so it is called a giant magnetostrictive material. A giant magnetostrictive actuator is a new type of precision displacement device. With its advantages such as fast response, large magnetization deformation displacement, and magnetization deformation law, it has been widely used in fields such as precision machining and sub-micron positioning. However, due to the relatively high thermal response sensitivity, the performance of giant magnetostrictive materials, such as the magnetic change coefficient, is likely to change due to temperature changes during operation. This greatly reduces the output accuracy of the giant magnetostrictive actuator, so temperature control has become an issue that the actuator has to consider. And currently, when a giant magnetostrictive actuator needs to drive an object to move, the giant magnetostrictive actuator is slidably sleeved on a slide rail, and the housing of the giant magnetostrictive actuator is fixedly connected to the object to be moved. One end of a magnetostrictive rod in the housing is fixedly connected to a mass block. Then, the current in the coil is slowly increased to make the magnetostrictive rod slowly elongate. At this time, due to the friction between the giant magnetostrictive actuator and the slide rail, the position of the giant magnetostrictive actuator is ensured to remain unchanged. Then, the current in the coil is quickly decreased to make the magnetostrictive rod quickly contract. The inertia generated overcomes the friction between the giant magnetostrictive actuator and the slide rail, driving the magnetostrictive actuator to move, and thus driving the object to be moved. However, after long-term friction between the giant magnetostrictive actuator and the slide rail, the friction coefficient between them decreases, affecting later use. And the inertia will cause a slight swing during movement, causing a slight swing of the object to be moved and affecting the working accuracy. Summary of the Invention

[0003] The purpose of the present invention is to provide a magnetostrictive drive mechanism to solve the problems existing in the background art. To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0004] A magnetostrictive drive mechanism includes a rectangular track. A chute is provided on the upper side of the rectangular track. An iron bar is provided on the inner wall of the lower side of the rectangular track. Grooves are symmetrically provided on the front and rear sides of the rectangular track. Slide rods are fixedly connected in both of the two grooves. An installation seat is slidably assembled by the two slide rods. A first electromagnet matching the iron bar is provided on the lower side of the installation seat. A housing is fixedly connected to the upper side of the installation seat. A moving platform extending out of the chute is fixedly connected to the upper side of the housing. A placement groove is provided in the housing. A magnetostrictive rod is assembled in the placement groove. An inner cavity surrounding the placement groove is provided in the housing. A coil is provided in the inner cavity. A sliding groove surrounding the placement groove is provided in the housing. A sleeve is sleeved in the extending groove. A circular baffle is fixedly connected to the sleeve extending out of the sliding groove. The circular baffle is fixedly connected to the magnetostrictive rod. A support seat sleeving the two slide rods is fixedly connected to the lower side of the circular baffle. A second electromagnet matching the iron bar is provided on the lower side of the support seat. A stabilizing component is provided between the support seat and the installation seat. Ventilation holes are provided in the magnetostrictive rod. Air pipes are respectively assembled at both ends of the ventilation holes passing through the housing and the circular baffle. The other ends of the two air pipes both extend out of the rectangular track. The rectangular track is provided with a support component matching the two air pipes.

[0005] Adopting the technical solution of the present invention, when it is necessary to move the mobile platform to the left or right, power is supplied to the first electromagnet to adsorb the iron bar, and the power supply to the second electromagnet is cancelled, so that the second electromagnet cancels the adsorption of the iron bar, thereby canceling the limit on the support seat and the circular baffle. At this time, power is supplied to the coil to make the magnetostrictive rod elongate. Since the first electromagnet on the lower side of the housing adsorbs the sticker, when the magnetostrictive rod elongates, it drives the circular baffle and the support seat to move to the left. The support seat moves relative to the limit rod. After moving the circular baffle to a suitable position, power is supplied to the second electromagnet, and the power supply to the first electromagnet is cancelled, so that the first electromagnet adsorbs the iron bar to limit the support seat and the circular baffle, and the second electromagnet cancels the adsorption of the iron bar to cancel the limit on the housing. At this time, the power supply to the coil is cancelled, and the magnetostrictive rod contracts, driving the housing to move towards the side of the circular baffle, and the housing drives the mobile platform to move to the left; when it is necessary to move the mobile platform to the right, power is supplied to the second electromagnet to adsorb the iron bar to limit the housing, and the power supply to the first electromagnet is cancelled to cancel the limit on the circular baffle and the support seat. At this time, the coil is energized to make the magnetostrictive rod extend, so that the housing moves to the right and drives the mobile platform to move to the right. When the housing is moved to a suitable position, power can be supplied to the first electromagnet, the power supply to the second electromagnet is cancelled, and the power supply to the coil is cancelled. The magnetostrictive rod contracts, driving the circular baffle and the support seat to move to the right; the staff can ventilate into the ventilation holes through any one of the air pipes to dissipate heat from the magnetostrictive rod, and then discharge it through the other air pipe. The support assembly ensures that while the housing and the circular baffle are moving, the air pipes on both sides can still ventilate and dissipate heat from the ventilation holes, and ensures that the air pipes on both sides are clean and orderly; this driving mechanism is convenient for the staff to dissipate heat from the magnetostrictive rod, ensures the precision of driving, and through the mutual cooperation of the first electromagnet and the second electromagnet, limits the housing and the support seat, replacing the traditional method of combining friction and inertia, ensuring the stability during the overall movement, preventing the mobile platform from shaking when moving, and compared with the traditional moving method by inertia, the moving distance is larger and the applicability is wider.

[0006] Further defined, the stabilizing component includes a support plate and a recessed slot. The recessed slot is arranged on the side of the mounting seat facing the support seat. The support plate is slidably assembled in the recessed slot, and one end of the support plate is fixedly connected to the support seat. With such a structure, the support plate can slide back and forth in the recessed slot, improving the stability between the housing and the support seat.

[0007] Further defined, the support assembly includes a limit rod and a plurality of sliding members. The limit rod is fixedly connected to the inner wall of the rectangular track. A plurality of the sliding members are sleeved on the limit rod, and a plurality of the sliding members are respectively fixedly connected to the other two air pipes. With such a structure, when the housing and the circular baffle move, the air pipes are pulled, and the sliding members are driven to move relative to the limit rod through the air pipes, making the air pipes regular and preventing the air pipes from affecting the movement of the housing and the circular baffle.

[0008] Further limitation: A number of heat dissipation plates are provided in each of the ventilation holes. Such a structure can enhance the heat dissipation effect of the magnetostrictive rod, increase the contact area with the heat dissipation gas, and improve the heat dissipation effect.

[0009] Further limitation: Conductive strips are provided on the inner wall of the lower side of the rectangular track, and elastic conductive top blocks are provided on the lower sides of the mounting seat and the support seat. Such a structure can ensure power supply to the housing and the circular baffle when they move.

[0010] Further limitation: Fixing blocks are fixedly connected to the front and rear sides of the rectangular track in the left - right direction, and screws are assembled on all four fixing blocks. Such a structure facilitates the staff to fix the rectangular slide rail.

[0011] Further limitation: An annular baffle is provided at the outlet of the sliding groove, and an annular limiting plate matching the annular baffle is fixedly connected to one end of the sleeve extending into the sliding groove. Such a structure can prevent the sleeve from completely moving out of the sliding groove.

[0012] The present invention has the following advantages compared with the prior art:

[0013] This driving mechanism facilitates the staff to dissipate heat from the magnetostrictive rod, ensures the precision of driving. Through the mutual cooperation of the first electromagnet and the second electromagnet, the housing and the support seat are limited, replacing the traditional way of combining friction and inertia, ensuring the stability during the overall movement, preventing the moving platform from shaking when moving, and compared with the traditional moving method by inertia, the moving distance is greater and the applicability is wider. Description of the Drawings

[0014] The present invention can be further illustrated by the non - restrictive embodiments given in the drawings;

[0015] Figure 1 It is a schematic structural diagram of an embodiment of a magnetostrictive driving mechanism of the present invention;

[0016] Figure 2 It is a schematic sectional structural diagram of an embodiment of a magnetostrictive driving mechanism of the present invention;

[0017] Figure 3 It is a schematic assembly structural diagram of the housing, the mounting seat, the circular baffle, the moving platform, the support seat and the support plate of an embodiment of a magnetostrictive driving mechanism of the present invention;

[0018] Figure 4 It is a schematic assembly structural diagram of the mounting seat, the housing, the moving platform and the magnetostrictive rod of an embodiment of a magnetostrictive driving mechanism of the present invention;

[0019] Figure 5Schematic assembly structure diagram of a support plate, a support base, a circular baffle and a sleeve in an embodiment of a magnetostrictive driving mechanism of the present invention;

[0020] Figure 6 Schematic cross-sectional structure diagram of a housing, a mounting base, a circular baffle, a moving platform, a support base and a support plate in an embodiment of a magnetostrictive driving mechanism of the present invention;

[0021] The main component symbols are explained as follows:

[0022] Rectangular track 1, chute 101, iron bar 102, groove 11, sliding rod 12, mounting base 13, first electromagnet 131, housing 14, moving platform 141, placement groove 15, magnetostrictive rod 16, inner cavity 17, coil 18, sliding groove 2, sleeve 21, circular baffle 22, support base 23, second electromagnet 24, ventilation hole 3, air pipe 31, support plate 32, extending groove 33, limiting rod 4, sliding member 41, heat dissipation plate 42, conductive strip 43, elastic conductive top block 44, fixing block 45, screw 46, annular baffle 47, annular limiting plate 48. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0024] As Figure 1-6 shown, a magnetostrictive driving mechanism of the present invention includes a rectangular track 1. A chute 101 is provided on the upper side of the rectangular track 1. An iron bar 102 is provided on the inner wall of the lower side of the rectangular track 1. Grooves 11 are symmetrically provided on the front and rear sides of the rectangular track 1. Sliding rods 12 are fixedly connected in both of the two grooves 11. A mounting base 13 is slidably assembled by the two sliding rods 12 together. A first electromagnet 131 matching the iron bar 102 is provided on the lower side of the mounting base 13. A housing 14 is fixedly connected to the upper side of the mounting base 13. A moving platform 141 extending out of the chute 101 is fixedly connected to the upper side of the housing 14. A placement groove 15 is provided in the housing 14. A magnetostrictive rod 16 is assembled in the placement groove 15. An inner cavity 17 surrounding the placement groove 15 for one week is provided in the housing 14. A coil 18 is provided in the inner cavity 2. A sliding groove 2 surrounding the placement groove 15 for one week is provided in the housing 14. A sleeve 21 is sleeved in the extending groove 2. A circular baffle 22 is fixedly connected to the sleeve 21 extending out of the sliding groove 2. The circular baffle 22 is fixedly connected to the magnetostrictive rod 16. A support base 23 sleeved with the two sliding rods 12 is fixedly connected to the lower side of the circular baffle 22. A second electromagnet 24 matching the iron bar 102 is provided on the lower side of the support base 23. A stabilizing assembly is provided between the support base 23 and the mounting base 13. A ventilation hole 3 is provided in the magnetostrictive rod 16. Air pipes 31 are respectively assembled through the housing 14 and the circular baffle 22 at both ends of the ventilation hole 3. The other ends of the two air pipes 31 both extend out of the rectangular track 1. A support assembly matching the two air pipes 31 is provided in the rectangular track 1.

[0025] Adopting the technical solution of the present invention, when it is necessary to move the mobile platform 141 to the left and right, power is supplied to the first electromagnet 131 to adsorb the iron bar 102, and the power supply to the second electromagnet 24 is cancelled, so that the second electromagnet 24 cancels the adsorption of the iron bar 102, thereby cancelling the limit on the support seat 23 and the circular baffle 22. At this time, power is supplied to the coil 18 to make the magnetostrictive rod 16 elongate. Since the first electromagnet 131 on the lower side of the housing 14 adsorbs the sticker 102, when the magnetostrictive rod 16 elongates, it drives the circular baffle 22 and the support seat 23 to move to the left. The support seat 23 moves relative to the limit rod 4. After moving the circular baffle 22 to a suitable position, power is supplied to the second electromagnet 24, and the power supply to the first electromagnet 131 is cancelled, so that the first electromagnet 131 adsorbs the iron bar 102 to limit the support seat 23 and the circular baffle 22, and the second electromagnet 24 cancels the adsorption of the iron bar 102 to cancel the limit on the housing 14. At this time, the power supply to the coil 18 is cancelled, and the magnetostrictive rod 16 contracts, driving the housing 14 to move towards the circular baffle 22, and the housing 14 drives the mobile platform 141 to move to the left; when it is necessary to move the mobile platform 141 to the right, power is supplied to the second electromagnet 24 to adsorb the iron bar 102 to limit the housing 14, and the power supply to the first electromagnet 131 is cancelled to cancel the limit on the circular baffle 22 and the support seat 23. At this time, the coil 18 is energized to make the magnetostrictive rod 16 extend, so that the housing 14 moves to the right and drives the mobile platform 141 to move to the right. When the housing 14 is moved to a suitable position, power can be supplied to the first electromagnet 131, the power supply to the second electromagnet 24 is cancelled, and the power supply to the coil 18 is cancelled. The magnetostrictive rod 16 contracts, driving the circular baffle 22 and the support seat 23 to move to the right; the staff can ventilate the air through any one of the air pipes 31 into the ventilation holes 3 to dissipate heat from the magnetostrictive rod 16, and then discharge it through the other air pipe 31. The support assembly ensures that while the housing 14 and the circular baffle 22 are moving, the air pipes 31 on both sides can still ventilate and dissipate heat from the ventilation holes 3, and ensures that the air pipes 31 on both sides are clean and orderly; this driving mechanism facilitates the staff to dissipate heat from the magnetostrictive rod 16, ensures the precision of the drive, and through the mutual cooperation of the first electromagnet 131 and the second electromagnet 24, limits the housing 14 and the support seat 23, replacing the traditional method of combining friction and inertia, ensuring the stability of the overall movement, preventing the mobile platform 141 from shaking when moving, and compared with the traditional moving method by inertia, the moving distance is larger and the applicability is wider.

[0026] Preferably, the stabilizing component includes a support plate 32 and an insertion groove 33. The insertion groove 33 is provided on the side of the mounting base 13 facing the support base 23. The support plate 32 is slidably assembled in the insertion groove 33, and one end of the support plate 32 is fixedly connected to the support base 23. With such a structure, the support plate 32 can slide back and forth in the insertion groove 33, improving the stability between the housing 14 and the support base 23. In fact, other structures can also be considered according to specific circumstances.

[0027] Preferably, the supporting component includes a limiting rod 4 and a plurality of sliding members 41. The limiting rod 4 is fixedly connected to the inner wall of the rectangular track 1. A plurality of sliding members 41 are sleeved on the limiting rod 4, and a plurality of sliding members 41 are respectively fixedly connected to the other two air pipes 31. With such a structure, when the housing 14 and the circular baffle 22 move, the air pipes 31 are pulled, and the sliding members 41 are driven to move relative to the limiting rod 4 through the air pipes 31, making the air pipes 31 regular and preventing the air pipes 31 from affecting the movement of the housing 14 and the circular baffle 22. In fact, other structures can also be considered according to specific circumstances.

[0028] Preferably, a plurality of heat dissipation plates 42 are provided in each of the ventilation holes 3. With such a structure, the heat dissipation effect of the magnetostrictive rod 16 can be increased, the contact area with the heat dissipation gas can be increased, and the heat dissipation effect can be improved. In fact, other structures can also be considered according to specific circumstances, which can increase the heat dissipation effect of the magnetostrictive rod 16, increase the contact area with the heat dissipation gas, and improve the heat dissipation effect.

[0029] Preferably, a conductive strip 43 is provided on the inner wall of the lower side of the rectangular track 1, and elastic conductive top blocks 44 are provided on the lower sides of the mounting base 13 and the support base 23. With such a structure, when the housing 14 and the circular baffle 22 move, the power supply to the housing 14 and the circular baffle 22 can be ensured. In fact, other structures can also be considered according to specific circumstances, which can ensure the power supply to the housing 14 and the circular baffle 22 when they move.

[0030] Preferably, fixing blocks 45 are fixedly connected to the front and rear sides of the rectangular track 1, and screws 46 are assembled on the four fixing blocks 45. With such a structure, it is convenient for the staff to fix the rectangular sliding rail 1. In fact, other structures can also be considered according to specific circumstances, which is convenient for the staff to fix the rectangular sliding rail 1.

[0031] Preferably, an annular baffle 47 is provided at the outlet of the sliding groove 2, and an annular limiting plate 48 matching the annular baffle 47 is fixedly connected to one end of the sleeve 21 extending into the sliding groove 2. With such a structure, the sleeve 21 can be prevented from completely moving out of the sliding groove 2. In fact, other structures can also be considered according to specific circumstances, preventing the sleeve 21 from completely moving out of the sliding groove 2.

[0032] The above embodiments are only used to exemplarily illustrate the principles and effects of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A magnetostrictive driving mechanism, comprising a rectangular track (1), with a chute (101) provided on the upper side of the rectangular track (1). Characterized in that: An iron bar (102) is provided on the inner wall of the lower side of the rectangular track (1). Grooves (11) are symmetrically provided on the front and rear sides of the rectangular track (1). Slide bars (12) are fixedly connected in both of the two grooves (11). An installation seat (13) is slidably assembled by the two slide bars (12). A first electromagnet (131) matching the iron bar (102) is provided on the lower side of the installation seat (13). A housing (14) is fixedly connected to the upper side of the installation seat (13). A moving platform (141) extending out of the chute (101) is fixedly connected to the upper side of the housing (14). A placement groove (15) is provided in the housing (14). A magnetostrictive rod (16) is assembled in the placement groove (15). An inner cavity (17) surrounding the placement groove (15) for one week is provided in the housing (14). A coil (18) is provided in the inner cavity (2). A sliding groove (2) surrounding the placement groove (15) for one week is provided in the housing (14). A sleeve (21) is sleeved in the sliding groove (2). A circular baffle (22) is fixedly connected to the sleeve (21) extending out of the sliding groove (2). The circular baffle (22) is fixedly connected to the magnetostrictive rod (16). A support seat (23) sleeved with the two slide bars (12) is fixedly connected to the lower side of the circular baffle (22). A second electromagnet (24) matching the iron bar (102) is provided on the lower side of the support seat (23). A stabilizing assembly is provided between the support seat (23) and the installation seat (13). Vent holes (3) are provided in the magnetostrictive rod (16). Air pipes (31) are respectively assembled through the housing (14) and the circular baffle (22) at both ends of the vent holes (3). The other ends of the two air pipes (31) both extend out of the rectangular track (1). The rectangular track (1) is provided with a support assembly matching the two air pipes (31).

2. A magnetostrictive driving mechanism according to claim 1, Characterized in that: The stabilizing assembly includes a support plate (32) and an insertion groove (33). The insertion groove (33) is provided on one side of the installation seat (13) facing the support seat (23). The support plate (32) is slidably assembled in the insertion groove (33). One end of the support plate (32) is fixedly connected to the support seat (23).

3. A magnetostrictive driving mechanism according to claim 1, Characterized in that: The support assembly includes a limiting rod (4) and several sliding members (41). The limiting rod (4) is fixedly connected to the inner wall of the rectangular track (1). Several sliding members (41) are all sleeved and connected with the limiting rod (4). Several sliding members (41) are respectively fixedly connected to the other two air pipes (31).

4. A magnetostrictive driving mechanism according to claim 1, Characterized in that: Several heat dissipation plates (42) are provided in the vent holes (3).

5. A magnetostrictive driving mechanism according to claim 1, Characterized in that: The inner wall of the lower side of the rectangular track (1) is provided with a conductive strip (43), and elastic conductive top blocks (44) are provided on the lower sides of the mounting base (13) and the support base (23).

6. A magnetostrictive drive mechanism according to claim 1, characterized in that: Fixed blocks (45) are fixedly connected to the left and right on both the front and rear sides of the rectangular track (1), and screws (46) are assembled on all four fixed blocks (45).

7. A magnetostrictive drive mechanism according to claim 1, characterized in that: An annular baffle (47) is provided at the outlet of the sliding groove (2), and an annular limiting plate (48) matching the annular baffle (47) is fixedly connected to one end of the sleeve (21) extending into the sliding groove (2).

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