Front-back hovering type linear motor and clamp holder

Abstract

The utility model discloses a front-and-back hovering type linear motor and a holder, and relates to the technical field of motor manufacturing, the front-and-back hovering type linear motor comprises a housing, a magnetic induction assembly and a hovering assembly, and the housing is provided with a through hole; the magnetic induction assembly comprises a coil assembly, a magnetic ring and a rotor push rod. The coil assembly and the shell define a motion cavity. The rotor push rod penetrates through the through hole; the magnetic ring is sleeved on the rotor push rod; the hovering assembly comprises two magnetic pieces, one magnetic piece is arranged at the front end of the shell, and the other magnetic piece is arranged at the rear end of the shell. And the two magnetic pieces apply suction force to the magnetic ring. In the technical scheme of the utility model, the rotor push rod is pushed out to reach the foremost end, the coil group is powered off, the attraction force of the front-end magnetic part to the magnetic ring is larger, and the magnetic ring is magnetically attracted at the outer front end, namely the rotor push rod is suspended at the front end; after the coil assembly is electrified, the mover push rod retreats, the attraction force of the front-end magnetic piece to the magnetic ring is smaller, the magnetic ring is magnetically attracted to the rear end of the shell, and the mover push rod is suspended at the two ends of the linear motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a front-rear suspended linear motor and a clamper. Background Art

[0002] The linear motor is a new type of electric actuator that adopts a cylindrical structure design and combines linear drive technology to achieve linear motion. It has the advantages of high speed, high precision and high efficiency during the movement process. Therefore, the linear motor has a wide range of applications in many fields.

[0003] In traditional linear motor designs, when the linear motor is powered off, the actuator push rod can only dock at the front or rear end of the motor, and it is impossible to hover at both ends of the motor, which limits the application scenarios of the linear motor. Utility Model Content

[0004] The main purpose of the utility model is to propose a front and rear hovering linear motor and a clamp, aiming to expand the application scenarios of the linear motor.

[0005] To achieve the above purpose, the front and rear suspended linear motor proposed in the present invention comprises

[0006] a housing, wherein the housing is formed with a through hole;

[0007] A magnetic induction component, comprising a coil assembly, a magnetic ring, and a movable push rod, wherein the coil assembly is disposed within the housing and encloses the housing to form a motion cavity connected to the through hole; the movable push rod is passed through the through hole, the magnetic ring is sleeved on the movable push rod, and the magnetic ring and part of the movable push rod are both located within the motion cavity; and

[0008] A suspension assembly, the suspension assembly comprising at least two magnetic members, one of the magnetic members being provided at a front end of the housing along a direction in which the mover push rod is pushed out, and the other of the magnetic members being provided at a rear end of the housing along a direction in which the mover push rod is pushed out;

[0009] Wherein, both of the two magnetic members exert suction force on the magnetic ring.

[0010] In one embodiment, the through hole further includes a limiting section and a mounting section, and two ends of the limiting section are connected to the movement cavity and the mounting section respectively;

[0011] The magnetic component located forward along the pushing direction of the movable push rod is a weak magnetic ring, which abuts against the inner peripheral wall of the installation section; the movable push rod is inserted into the limiting section and the weak magnetic ring.

[0012] In one embodiment, the movable push rod is slidingly connected to the inner circumferential wall of the limiting section and the inner hole wall of the weak magnetic ring respectively, so that the inner circumferential wall of the limiting section and the inner hole wall of the weak magnetic ring cooperate to limit the movable push rod.

[0013] In one embodiment, the magnetic member located rearward along the pushing direction of the mover push rod is a weak magnet; an installation groove is formed on the outer wall of the housing away from the through hole, and the weak magnet is arranged in the installation groove.

[0014] In one embodiment, the mover push rod is formed with a stop ring, which abuts against the magnetic ring and is located between the magnetic ring and the periphery of the through hole; the outer diameter of the stop ring is larger than the inner diameter of the through hole.

[0015] In one embodiment, the front-rear suspended linear motor further includes a first buffer ring, which is disposed in the housing and through which the mover push rod passes; the first buffer ring is located between the stop ring and the periphery of the through hole.

[0016] In one embodiment, the front-rear suspended linear motor further includes a second buffer ring, and the second buffer ring is provided on an inner wall of the housing away from the through hole.

[0017] In one embodiment, the coil group includes multiple coils and multiple positioning rings, and a positioning ring is provided between each two adjacent coils; the outer peripheral wall of each positioning ring abuts against the inner wall of the outer shell; each positioning ring, each coil and the outer shell enclose to form the motion cavity.

[0018] In one embodiment, the shell includes an upper cover and a barrel, and the upper cover is detachably connected to the barrel; the upper cover is formed with the through hole; the coil group is arranged in the barrel and is enclosed with the upper cover to form the motion cavity; the magnetic part in front of the pushing direction of the movable push rod is arranged on the upper cover, and the magnetic part in the rear of the pushing direction of the movable push rod is arranged on the barrel.

[0019] The utility model also provides a clamp, the clamp comprising

[0020] a housing, wherein the housing is formed with a through hole;

[0021] A magnetic induction component, comprising a coil assembly, a magnetic ring, and a movable push rod, wherein the coil assembly is disposed within the housing and encloses the housing to form a motion cavity connected to the through hole; the movable push rod is passed through the through hole, the magnetic ring is sleeved on the movable push rod, and the magnetic ring and part of the movable push rod are both located within the motion cavity; and

[0022] A suspension assembly, the suspension assembly comprising at least two magnetic members, one of the magnetic members being provided at a front end of the housing along a direction in which the mover push rod is pushed out, and the other of the magnetic members being provided at a rear end of the housing along a direction in which the mover push rod is pushed out;

[0023] Wherein, both of the two magnetic members exert suction force on the magnetic ring.

[0024] In the technical solution of the present invention, the front and rear hovering linear motor includes a shell, a magnetic induction component and a hovering component, and the shell is formed with a through hole; the magnetic induction component includes a coil group, a magnetic ring and a mover push rod, the coil group is arranged in the shell, and is enclosed with the shell to form a motion cavity connected to the through hole; the mover push rod is passed through the through hole, and the magnetic ring is sleeved on the mover push rod, and part of the structure of the magnetic ring and the mover push rod are located in the motion cavity; the hovering component includes at least two magnetic parts, one magnetic part is arranged at the front end of the shell along the pushing direction of the mover push rod, and the other magnetic part is arranged at the rear end of the shell along the pushing direction of the mover push rod; wherein, both magnetic parts exert suction on the magnetic ring. In the technical solution of the present invention, the coil group is energized to push the mover push rod out. When the mover push rod reaches the front end of the pushing direction, the coil group is de-energized. Since the distance is closer, the suction force of the front magnetic part on the magnetic ring is greater than the suction force of the rear magnetic part on the magnetic ring. Therefore, the magnetic ring is magnetically attracted to the front end of the shell by the front magnetic part, that is, the mover push rod hovers at the front end; after the coil group is energized again, the mover push rod is pulled back, and the mover push rod returns to the initial position. Since the distance is closer, the suction force of the front magnetic part on the magnetic ring is less than the suction force of the rear magnetic part on the magnetic ring. Therefore, the magnetic ring is magnetically attracted to the rear end of the shell by the rear magnetic part; in this way, the mover push rod can hover at both ends of the linear motor shell, expanding the application scenarios of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of an embodiment of a front and rear hovering linear motor provided by the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the housing of the front and rear hovering linear motor;

[0028] Figure 3 This is a schematic diagram of the structure of the coil group in the front and rear hovering linear motor.

[0029] Description of Figure Numbers:

[0030] 1000 Front and rear hovering linear motors 21a Movement cavity 1 shell 211 Coil 1a through-hole 212 locating ring 1a1 Limit section 22 Magnetic ring 1a2 Installation section 23 Mover push rod 1b Mounting slot 231 Stop ring 11 Upper cover 31 Magnetic parts 12 barrel 4 First buffer ring 21 Coil assembly 5 Second buffer ring

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The utility model provides a front-rear hovering linear motor 1000.

[0036] See also Figure 1The front-to-rear hovering linear motor 1000 includes a shell 1, a magnetic induction component and a hovering component. The shell 1 is formed with a through hole 1a; the magnetic induction component includes a coil group 21, a magnetic ring 22 and a movable push rod 23. The coil group 21 is arranged in the shell 1 and is enclosed with the shell 1 to form a motion cavity 21a connected to the through hole 1a; the movable push rod 23 is passed through the through hole 1a, and the magnetic ring 22 is sleeved on the movable push rod 23. Part of the structure of the magnetic ring 22 and the movable push rod 23 are both located in the motion cavity 21a; the hovering component includes at least two magnetic parts 31, one magnetic part 31 is arranged at the front end of the shell 1 along the pushing direction of the movable push rod 23, and the other magnetic part 31 is arranged at the rear end of the shell 1 along the pushing direction of the movable push rod 23; wherein, both magnetic parts 31 exert suction on the magnetic ring 22.

[0037] In the technical solution of the present invention, after the coil group 21 is energized, the movable push rod 23 is pushed out. When the movable push rod 23 reaches the front end of the pushing direction, the coil group 21 is de-energized. Due to the closer distance, the suction force of the front magnetic part 31 on the magnetic ring 22 is greater than the suction force of the rear magnetic part 31 on the magnetic ring 22. Therefore, the magnetic ring 22 is magnetically attracted to the front end of the shell 1 by the front magnetic part 31, that is, the movable push rod 23 hovers at the front end; after the coil group 21 is energized again, the movable push rod 23 is pulled back, and the movable push rod 23 returns to the initial position. Due to the closer distance, the suction force of the front magnetic part 31 on the magnetic ring 22 is less than the suction force of the rear magnetic part 31 on the magnetic ring 22. Therefore, the magnetic ring 22 is magnetically attracted to the rear end of the shell 1 by the rear magnetic part 31; in this way, the movable push rod 23 can hover at both ends of the linear motor shell 1, which expands the application scenarios of the linear motor.

[0038] See also Figure 1 In one embodiment of the present invention, the hovering assembly includes two magnetic members 31. These two magnetic members 31, one in front of the other, can achieve the forward and backward hovering function. Compared to three, four, or more magnetic members 31, two magnetic members 31 have the lowest production cost. Therefore, it is preferred that the hovering assembly include two magnetic members 31.

[0039] See also Figure 1 and Figure 2In one embodiment of the present invention, the through hole 1a further includes a limiting section 1a1 and a mounting section 1a2. The limiting section 1a1 has two ends that connect to the motion chamber 21a and the mounting section 1a2, respectively. The magnetic member 31 located forward along the direction in which the mover push rod 23 is pushed out is a weak magnetic ring, which abuts against the inner circumferential wall of the mounting section 1a2. The mover push rod 23 is disposed within the limiting section 1a1 and the weak magnetic ring. The weak magnetic ring abuts against the inner circumferential wall of the mounting section 1a2, ensuring that the weak magnetic ring does not abut against the magnetic ring 22 when the mover push rod 23 and the magnetic ring 22 are pushed out to the front end. This prevents excessive magnetic attraction from making separation difficult between the weak magnetic ring and the magnetic ring 22. Furthermore, by optimizing the magnetic attraction between the weak magnetic ring and the magnetic ring 22 when the mover push rod 23 is hovering, the front-to-back hovering linear motor 1000 can avoid consuming excessive energy to overcome the excessive magnetic attraction, thereby improving the energy efficiency of the front-to-back hovering linear motor 1000.

[0040] See also Figure 1 and Figure 2 In one embodiment of the present invention, the mover push rod 23 is slidably connected to the inner circumferential wall of the limiting section 1a1 and the inner hole wall of the weak magnetic ring, respectively, so that the inner circumferential wall of the limiting section 1a1 and the inner hole wall of the weak magnetic ring cooperate to limit the mover push rod 23. By the inner circumferential wall of the limiting section 1a1 and the inner hole wall of the weak magnetic ring cooperating to limit the mover push rod 23, it is possible to ensure that the mover push rod 23 always reciprocates on the same straight line, effectively preventing the mover push rod 23 from deflecting during movement; at the same time, the inner circumferential wall of the limiting section 1a1 and the inner hole wall of the weak magnetic ring cooperating to limit the mover push rod 23 can also cause the magnetic ring 22 to suspend within the motion cavity 21a, avoiding frictional resistance generated by contact between the magnetic ring 22 and the coil assembly 21, thereby improving the output efficiency of the front-to-back suspended linear motor 1000.

[0041] See also Figure 1 In one embodiment of the present invention, the magnetic member 31 located rearward along the direction in which the movable push rod 23 is pushed out is a weak magnet; an installation groove 1b is formed on the outer wall of the housing 1 away from the through hole 1a, and the weak magnet is disposed within the installation groove 1b. The weak magnet is disposed within the installation groove 1b formed on the outer wall of the housing 1, so that when the movable push rod 23 and the magnetic ring 22 retract to the rear end, the weak magnet will not abut against the magnetic ring 22, thereby preventing the magnetic attraction from being too strong and making it difficult to separate the weak magnet from the magnetic ring 22. At the same time, since the magnetic attraction between the weak magnet and the magnetic ring 22 is optimized when the movable push rod 23 is hovering, it is possible to prevent the front-to-back hovering linear motor 1000 from consuming too much energy to overcome the excessive magnetic attraction, thereby improving the energy efficiency of the front-to-back hovering linear motor 1000.

[0042] See also Figure 1In one embodiment of the present invention, the movable push rod 23 is formed with a stop ring 231. The stop ring 231 abuts the magnetic ring 22 and is located between the magnetic ring 22 and the periphery of the through hole 1a. The outer diameter of the stop ring 231 is larger than the inner diameter of the through hole 1a. The stop ring 231 is larger than the inner diameter of the through hole 1a and is confined within the motion cavity 21a by the periphery of the through hole 1a. This allows the magnetic ring 22 and part of the movable push rod 23 to be confined within the motion cavity 21a. This prevents the coil assembly 21 from pushing the movable push rod 23 and the magnetic ring 22 out of the housing 1 when the current is too high.

[0043] See also Figure 1 In one embodiment of the present invention, the front-rear suspended linear motor 1000 further includes a first buffer ring 4 disposed within the housing 1. The mover push rod 23 is disposed through the first buffer ring 4 and is positioned between the stop ring 231 and the periphery of the through hole 1a. The provision of the first buffer ring 4 effectively absorbs the impact force exerted by the mover push rod 23 on the front end of the motor housing 1 during movement, reducing damage to the motor's internal structure. It also ensures the stability of the mover push rod 23 during operation, preventing displacement due to vibration or imbalance, and reduces noise generated by the motor's operation.

[0044] See also Figure 1 In one embodiment of the present invention, the front-rear suspension linear motor 1000 further includes a second buffer ring 5, which is disposed on the inner wall of the housing 1, away from the through hole 1a. The provision of the second buffer ring 5 effectively absorbs the impact force exerted by the mover push rod 23 on the rear end of the motor housing 1 during movement, reducing damage to the internal structure of the motor. It also ensures that the mover push rod 23 remains stable during operation, preventing deviation caused by vibration or imbalance, and reduces noise generated by the motor operation.

[0045] The coil assembly 21 includes a plurality of coils 211 and a plurality of positioning rings 212. A positioning ring 212 is provided between each two adjacent coils 211. The outer peripheral wall of each positioning ring 212 abuts against the inner wall of the housing 1. The positioning rings 212, each coil 211 and the housing 1 enclose a motion cavity 21a. Figure 1 and Figure 3 In one embodiment of the present invention, the coil assembly 21 includes two coils 211 and a positioning ring 212. The positioning ring 212 is positioned between the two coils 211. The outer peripheral wall of the positioning ring 212 abuts the inner wall of the housing 1. The positioning ring 212, the coils 211, and the housing 1 together form a motion cavity 21a. By using the positioning ring 212 to directly secure the two coils 211, the linear motor can reduce the air gap, improve magnetic field utilization, reduce power loss, and thus enhance the efficiency and thrust of the linear motor.

[0046] Please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the housing 1 includes an upper cover 11 and a barrel 12. The upper cover 11 is detachably connected to the barrel 12. The upper cover 11 defines a through hole 1a. The coil assembly 21 is disposed within the barrel 12 and, together with the upper cover 11, forms a motion chamber 21a. A magnetic member 31 positioned forward of the direction in which the mover push rod 23 is pushed out is disposed on the upper cover 11, while a magnetic member 31 positioned rearward of the direction in which the mover push rod 23 is pushed out is disposed on the barrel 12. The split design of the housing 1 facilitates installation of the linear motor's internal components and also makes replacement and maintenance more convenient.

[0047] The present invention also provides a gripper comprising a gripper and a front-to-back hovering linear motor 1000. The specific structure of the front-to-back hovering linear motor 1000 is similar to the above-described embodiments. Since the present gripper utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects provided by the technical solutions of the above-described embodiments, and a detailed description thereof will not be repeated here. The gripper is provided on a mover push rod 23. By utilizing the ability of the front-to-back hovering linear motor 1000 to hover at both ends, the gripper can be driven by the front-to-back hovering linear motor 1000 to maintain an open or closed position when gripping an object, providing user convenience.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A front-to-back hovering linear motor (1000), characterized in that: include A housing (1), wherein the housing (1) is formed with a through hole (1a); A magnetic induction component, comprising a coil group (21), a magnetic ring (22) and a movable push rod (23); the coil group (21) is arranged in the housing (1) and encloses the housing (1) to form a motion cavity (21a) in communication with the through hole (1a); the movable push rod (23) is passed through the through hole (1a), the magnetic ring (22) is sleeved on the movable push rod (23), and partial structures of the magnetic ring (22) and the movable push rod (23) are both located in the motion cavity (21a); as well as A suspension assembly, the suspension assembly comprising at least two magnetic members (31), one of the magnetic members (31) being arranged at a front end of the housing (1) along the direction in which the movable push rod (23) is pushed out, and the other of the magnetic members (31) being arranged at a rear end of the housing (1) along the direction in which the movable push rod (23) is pushed out; Wherein, both of the two magnetic members (31) exert suction force on the magnetic ring (22).

2. The front-to-rear hovering linear motor (1000) according to claim 1, characterized in that: The through hole (1a) further comprises a limiting section (1a1) and a mounting section (1a2), and two ends of the limiting section (1a1) are respectively connected to the movement cavity (21a) and the mounting section (1a2); The magnetic component (31) located forward along the pushing direction of the movable push rod (23) is a weak magnetic ring, which abuts against the inner peripheral wall of the limiting position of the installation section (1a2); the movable push rod (23) is inserted into the limiting section (1a1) and the weak magnetic ring.

3. The front-to-rear hovering linear motor (1000) according to claim 2, characterized in that: The movable push rod (23) is slidably connected to the inner peripheral wall of the limiting section (1a1) and the inner hole wall of the weak magnetic ring, respectively, so that the inner peripheral wall of the limiting section (1a1) and the inner hole wall of the weak magnetic ring cooperate to limit the movable push rod (23).

4. The front-to-rear hovering linear motor (1000) according to claim 1, characterized in that: The magnetic member (31) located rearward along the pushing direction of the movable push rod (23) is a weak magnet; an installation groove (1b) is formed on the outer wall of the housing (1) away from the through hole (1a), and the weak magnet is arranged in the installation groove (1b).

5. The front-to-rear hovering linear motor (1000) according to claim 1, characterized in that: The movable push rod (23) is formed with a stop ring (231), the stop ring (231) abuts against the magnetic ring (22) and is located between the magnetic ring (22) and the periphery of the through hole (1a); the outer diameter of the stop ring (231) is greater than the inner diameter of the through hole (1a).

6. The front-to-rear hovering linear motor (1000) according to claim 5, characterized in that: The front-rear suspended linear motor (1000) further comprises a first buffer ring (4), the first buffer ring (4) being arranged in the housing (1), the mover push rod (23) being passed through the first buffer ring (4); the first buffer ring (4) being located between the stop ring (231) and the periphery of the through hole (1a).

7. The front-to-back suspended linear motor (1000) according to claim 6, characterized in that: The front-rear suspended linear motor (1000) further comprises a second buffer ring (5), wherein the second buffer ring (5) is arranged on an inner wall of the housing (1) away from the through hole (1a).

8. The front-to-back suspended linear motor (1000) according to any one of claims 1 to 7, characterized in that: The coil group (21) comprises a plurality of coils (211) and a plurality of positioning rings (212), wherein a positioning ring (212) is provided between each two adjacent coils (211); the outer peripheral wall of each positioning ring (212) abuts against the inner wall of the outer shell (1); and each positioning ring (212), each coil (211) and the outer shell (1) enclose and form the motion cavity (21a).

9. The front-to-back suspended linear motor (1000) according to any one of claims 1 to 7, characterized in that: The shell (1) comprises an upper cover (11) and a barrel (12), wherein the upper cover (11) is detachably connected to the barrel (12); the upper cover (11) is formed with the through hole (1a); the coil group (21) is arranged in the barrel (12) and enclosed with the upper cover (11) to form the motion cavity (21a); ​​the magnetic member (31) is arranged on the upper cover (11) at the front of the ejection direction of the movable push rod (23), and the magnetic member (31) is arranged on the barrel (12) at the rear of the ejection direction of the movable push rod (23).

10. A clamp, characterized in that: The clamper comprises a clamping claw and a front-to-rear suspended linear motor (1000) according to any one of claims 1 to 9, wherein the clamping claw is provided on the mover push rod (23).

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