Adjustable electromagnetic push rod

Abstract

The utility model provides an adjustable electromagnetic push rod, and belongs to the technical field of electromagnetic push rods. The problems that in an existing electromagnetic push rod, a lubricating device is not arranged between a sliding block and the inner wall of a shell, the contact area is large, large friction force exists, the moving speed of the sliding block is reduced, and the service life of the sliding block is prolonged are solved. The device comprises a shell, a push rod, a push rod head, a sliding head, an electromagnet and a displacement sensor, the shell is provided with a containing cavity, the push rod penetrates through the shell in a sliding mode, the push rod head is detachably connected to one end of the push rod and located outside the containing cavity, the sliding head comprises a moving ring, a permanent magnet and a protective sleeve, the protective sleeve is fixedly connected with the moving ring, and a cavity is defined by the protective sleeve and the moving ring; the permanent magnet is fixedly arranged in the cavity, the moving ring is fixedly connected with the other end of the push rod, and the moving ring slidably penetrates through the containing cavity; a lubricating grease storage groove is formed in the peripheral wall of the moving ring, the electromagnet is fixedly arranged at one end of the containing cavity, and the electromagnet and the permanent magnet can attract or repel each other. The device has the capability of fast reciprocating.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic push rods, in particular to an adjustable electromagnetic push rod. Background Art

[0002] Traditional electric linear actuators rely on a lead screw mechanism to convert the motor's rotational motion into linear motion. Their performance is limited by material strength and design, resulting in limited speed, acceleration, and load capacity. They lack the ability to adaptively adjust thrust based on load, and are unable to efficiently achieve rapid reciprocating motion. Existing electromagnetic linear actuators generally have the following structure: a slider with a permanent magnet is positioned at one end of the actuator. Driven by an electromagnet, the slider slides within the housing. However, the lack of a lubrication device between the slider and the inner wall of the housing and the large contact area create significant friction, reducing the slider's movement speed and service life. Consequently, the electromagnetic linear actuator's reciprocating speed and lifespan are reduced. Utility Model Content

[0003] In view of this, in order to solve the problem that there is no lubrication device between the slider and the inner wall of the shell in the existing electromagnetic push rod and the contact area is large, there will be large friction, which reduces the movement speed and service life of the slider, the utility model proposes an adjustable electromagnetic push rod.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An adjustable electromagnetic push rod, comprising:

[0006] A housing, wherein the housing is provided with a receiving cavity;

[0007] A push rod, the push rod is slidably arranged in the housing;

[0008] A push rod head, which is detachably connected to one end of the push rod and is located outside the accommodating cavity;

[0009] The sliding head includes a moving ring, a permanent magnet, and a protective cover. The protective cover is fixedly connected to the moving ring, and the protective cover and the moving ring form a cavity. The permanent magnet is fixedly disposed in the cavity. The moving ring is fixedly connected to the other end of the push rod, and the moving ring slides through the accommodating cavity. The outer peripheral wall of the moving ring is provided with a grease storage groove.

[0010] The electromagnet is fixedly arranged at one end of the accommodating cavity, and the electromagnet and the permanent magnet can attract or repel each other.

[0011] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, there are multiple grease storage grooves, and the multiple grease storage grooves are arranged at intervals along the axial direction of the moving ring.

[0012] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the outer peripheral wall of the movement ring is provided with a plurality of grooves, and the plurality of grooves are arranged at intervals along the circumferential direction of the movement ring.

[0013] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the moving ring is provided with a plurality of weight-reducing holes at intervals.

[0014] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the adjustable electromagnetic push rod further includes a vibration isolation rubber pad, which is fixedly arranged in the cavity and located between the permanent magnet and the moving ring.

[0015] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the adjustable electromagnetic push rod further includes a rubber limiting structure, and the rubber limiting structure is fixedly arranged at an end of the accommodating cavity away from the electromagnet.

[0016] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the adjustable electromagnetic push rod further includes a guide bearing, which is arranged between the push rod and the housing.

[0017] As a preferred solution of the above-mentioned adjustable electromagnetic push rod, the push rod head is connected to the push rod through threads.

[0018] Compared with the prior art, the adjustable electromagnetic push rod provided by the present invention has the following beneficial effects:

[0019] 1. The utility model provides an adjustable electromagnetic push rod, in which the electromagnet can generate a variable magnetic field when energized, and the permanent magnet can move in response to the magnetic field generated by the electromagnet, so that the electromagnet can drive the permanent magnet to move. By using electromagnetic repulsion rather than mechanical contact to drive the push rod, the adjustable electromagnetic push rod has excellent vibration isolation performance and greater load-bearing capacity, as well as enhanced resistance to impact loads. In addition, by adjusting the current flowing through the electromagnet, the output thrust and displacement of the push rod can be flexibly adjusted, significantly improving the thrust range and response speed. The protective cover provides physical protection for the permanent magnet to prevent collision damage, thereby improving the impact resistance of the adjustable electromagnetic push rod. The moving ring moves with the permanent magnet, and the moving ring maintains a clearance fit with the inner wall of the accommodating cavity to ensure smooth movement. The outer wall of the motion ring is equipped with a grease storage groove, which can store grease and lubricate the sliding between the motion ring and the inner wall of the accommodating cavity. The grease storage groove on the outer wall of the motion ring also reduces the contact area between the motion ring and the inner wall of the accommodating cavity, further reducing the friction between the motion ring and the inner wall of the accommodating cavity, making the motion of the motion ring smoother and increasing the reciprocating speed of the adjustable electromagnetic push rod. The adjustable electromagnetic push rod has the ability to dynamically adjust the thrust, large displacement changes, and fast reciprocating speed, making it suitable for high-frequency, high-precision automated operations.

[0020] 2. The present invention provides an adjustable electromagnetic push rod with multiple grease storage grooves spaced axially along the moving ring. Multiple grooves are spaced circumferentially along the moving ring. Multiple weight-reducing holes are also spaced apart within the moving ring. By reducing the weight of the moving ring and the contact area between the moving ring and the inner wall of the housing, as well as grease lubrication, frictional resistance is further reduced, ensuring smooth movement and increasing the push rod's reciprocating speed.

[0021] 3. The utility model provides an adjustable electromagnetic push rod, in which a vibration-isolating rubber pad is fixedly disposed in a cavity and is located between the permanent magnet and the moving ring. The protective sleeve and the vibration-isolating rubber pad serve as a buffer layer, sandwiching the permanent magnet, protecting the permanent magnet, improving impact resistance, and enhancing the safety and reliability of the adjustable electromagnetic push rod. A rubber limiting structure is fixedly disposed at one end of the accommodating cavity away from the electromagnet. The rubber limiting structure is made of rubber material and can provide a flexible and reliable limiting function to prevent the sliding head from impacting the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a cross-sectional view of an adjustable electromagnetic push rod provided by a specific embodiment of the utility model;

[0024] Figure 2 This is a structural diagram of a motion ring of an adjustable electromagnetic push rod provided by a specific embodiment of the utility model;

[0025] Figure 3 This is a structural diagram of an adjustable electromagnetic push rod provided by a specific embodiment of the utility model;

[0026] Figure 4 It is a partial structural diagram of an adjustable electromagnetic push rod provided by a specific embodiment of the utility model.

[0027] In the picture:

[0028] 1. Housing; 2. Push rod; 3. Push rod head; 41. Moving ring; 42. Protective cover; 43. Permanent magnet; 44. Vibration isolation rubber pad; 411. Grease storage tank; 412. Groove; 413. Weight reduction hole; 5. Electromagnet; 6. Rubber limit structure; 7. Guide bearing; 8. Displacement sensor; 9. Pressure sensor; 10. Fixed seat. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] See also Figure 1-4Describing this embodiment, the utility model provides an adjustable electromagnetic push rod, which includes a shell 1, a push rod 2, a push rod head 3, a sliding head, an electromagnet 5 and a displacement sensor 8. The shell 1 is provided with a accommodating cavity, the push rod 2 is slidably arranged in the shell 1, the push rod head 3 is detachably connected to one end of the push rod 2, and is located outside the accommodating cavity, the sliding head includes a moving ring 41, a permanent magnet 43 and a protective cover 42, the protective cover 42 is fixedly connected to the moving ring 41, the protective cover 42 and the moving ring 41 form a cavity, the permanent magnet 43 is fixedly arranged in the cavity, the moving ring 41 is fixedly connected to the other end of the push rod 2, and the moving ring 41 is slidably arranged in the accommodating cavity; the outer peripheral wall of the moving ring 41 is provided with a grease storage groove 411, the electromagnet 5 is fixedly arranged at one end of the accommodating cavity, and the electromagnet 5 and the permanent magnet 43 can attract or repel each other.

[0034] The adjustable electromagnetic push rod, the electromagnet 5 can generate a variable magnetic field when energized, and the permanent magnet 43 can move in response to the magnetic field generated by the electromagnet 5, so that the electromagnet 5 can drive the permanent magnet 43 to move. The push rod 2 is driven by electromagnetic repulsion rather than mechanical contact, which gives the adjustable electromagnetic push rod excellent vibration isolation performance and greater load-bearing capacity, as well as enhanced resistance to impact loads. In addition, by adjusting the current flowing through the electromagnet 5, the output thrust and displacement of the push rod 2 can be flexibly adjusted, significantly improving the thrust range and response speed. The protective cover 42 provides physical protection for the permanent magnet 43 to prevent collision damage, thereby improving the impact resistance of the adjustable electromagnetic push rod. The moving ring 41 moves with the permanent magnet 43, and the moving ring 41 maintains a clearance fit with the inner wall of the accommodating cavity to ensure smooth movement. The outer wall of the movement ring 41 is provided with a grease storage groove 411. The grease storage groove 411 can store grease and lubricate the sliding between the movement ring 41 and the inner wall of the accommodating cavity. The grease storage groove 411 on the outer wall of the movement ring 41 also reduces the contact area between the movement ring 41 and the inner wall of the accommodating cavity, further reducing the friction between the movement ring 41 and the inner wall of the accommodating cavity, making the movement of the movement ring 41 smoother and increasing the reciprocating speed of the adjustable electromagnetic push rod. The adjustable electromagnetic push rod has the ability to dynamically adjust the thrust, large displacement changes, and rapid reciprocating speed, making it suitable for high-frequency, high-precision automated operations.

[0035] Optionally, there are multiple grease storage grooves 411, which are spaced apart along the axial direction of the moving ring 41. Providing multiple grease storage grooves 411 on the outer peripheral wall of the moving ring 41 reduces the contact area between the moving ring 41 and the inner wall of the accommodating cavity. The grease in the grease storage grooves can lubricate the moving ring 41 and the inner wall of the accommodating cavity, further reducing frictional resistance and ensuring smooth movement.

[0036] Optionally, the outer peripheral wall of the movement ring 41 is provided with a plurality of grooves 412, which are spaced apart along the circumference of the movement ring 41. This can reduce the contact area between the outer peripheral wall of the movement ring 41 and the inner wall of the accommodating cavity, thereby reducing the frictional resistance between the movement ring 41 and the inner wall of the accommodating cavity and increasing the reciprocating speed of the push rod 2.

[0037] Optionally, the movement ring 41 is provided with a plurality of weight-reducing holes 413 at intervals, which can reduce the weight of the movement ring 41 and thus increase the movement speed.

[0038] Optionally, the adjustable electromagnetic push rod further includes a vibration-isolating rubber pad 44, which is fixedly disposed in the cavity and located between the permanent magnet 43 and the moving ring 41. The protective cover 42 and the vibration-isolating rubber pad 44 serve as a buffer layer, sandwiching the permanent magnet 43 in the middle, protecting the permanent magnet 43, improving impact resistance, and improving the safety and reliability of the adjustable electromagnetic push rod.

[0039] Optionally, the adjustable electromagnetic push rod further includes a rubber limiting structure 6, which is fixedly arranged at one end of the accommodating cavity away from the electromagnet 5. The rubber limiting structure 6 is made of rubber material and can provide a flexible and reliable limiting function to prevent the sliding head from impacting the housing 1.

[0040] Optionally, a pressure sensor 9 is fixedly provided on the push rod head 3. The pressure sensor 9 is used to monitor the pressure applied to the push rod 2 in real time. Optionally, the adjustable electromagnetic push rod also includes a displacement sensor 8, which is arranged in the accommodating cavity and can detect the displacement of the push rod 2. The outer shell of the displacement sensor 8 extends along the sliding direction of the push rod 2, and the push rod 2 is slidably sleeved on the outer shell of the displacement sensor 8. The displacement sensor 8 can accurately measure the displacement of the push rod 2, and also serves as a guide device for the sliding head and the push rod 2. The position and load information are monitored in real time by the high-precision displacement sensor 8 and the pressure sensor 9, so as to realize precise thrust adjustment under closed-loop control. The thrust can be adaptively adjusted according to the displacement and load changes, which broadens the application scenarios.

[0041] The housing of the displacement sensor 8 serves as a guide structure for the push rod 2 and the sliding head, which can make the overall structure of the adjustable electromagnetic push rod compact, thereby ensuring the smoothness of movement, ensuring movement accuracy, and saving space.

[0042] The displacement sensor 8 is a pull-rod linear displacement sensor 8. One end of the pull-rod of the displacement sensor 8 is fixed to the push rod 2 via a nut. Sealant is applied near the nut to ensure sealing. The end of the housing of the displacement sensor 8 away from the pull-rod is fixed to the housing 1.

[0043] Optionally, the adjustable electromagnetic push rod further includes a guide bearing 7, which is disposed between the push rod 2 and the housing 1. The guide bearing 7 provides guide support for the push rod 2, ensuring the motion accuracy of the push rod 2 under long strokes. The guide bearing 7 is a linear bearing that can ensure smooth operation of the push rod 2, reduce friction loss, and extend service life;

[0044] Optionally, the push rod head 3 is connected to the push rod 2 by a thread. By threading the push rod head 3 and the push rod 2, maintenance, use and quick assembly are facilitated, and the push rod head 3 can be quickly replaced according to different application scenarios.

[0045] Optionally, the housing 1 is made of aluminum alloy material, which not only plays a supporting and protective role, but also achieves a lightweight design and ensures sufficient rigidity.

[0046] Optionally, the housing 1 is provided with a fixing seat 10 for fixing the electromagnet 5, which has both limiting and protective functions.

[0047] Obviously, the embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. An exhaustive list of all possible embodiments is unnecessary and impossible.

Claims

1. An adjustable electromagnetic push rod, characterized in that: include: A housing (1), wherein the housing (1) is provided with a receiving cavity; A push rod (2), the push rod (2) is slidably arranged in the housing (1); A push rod head (3), which is detachably connected to one end of the push rod (2) and is located outside the accommodating cavity; The sliding head comprises a moving ring (41), a permanent magnet (43) and a protective cover (42); the protective cover (42) is fixedly connected to the moving ring (41); the protective cover (42) and the moving ring (41) form a cavity; the permanent magnet (43) is fixedly arranged in the cavity; the moving ring (41) is fixedly connected to the other end of the push rod (2); the moving ring (41) is slidably inserted into the accommodating cavity; and a grease storage groove (411) is provided on the outer peripheral wall of the moving ring (41); The electromagnet (5) is fixedly arranged at one end of the accommodating cavity, and the electromagnet (5) and the permanent magnet (43) can attract or repel each other.

2. The adjustable electromagnetic push rod according to claim 1, characterized in that: There are multiple grease storage grooves (411), and the multiple grease storage grooves (411) are arranged at intervals along the axial direction of the moving ring (41).

3. The adjustable electromagnetic push rod according to claim 1, characterized in that: The outer peripheral wall of the movement ring (41) is provided with a plurality of grooves (412), and the plurality of grooves (412) are arranged at intervals along the circumferential direction of the movement ring (41).

4. The adjustable electromagnetic push rod according to claim 1, characterized in that: The movement ring (41) is provided with a plurality of weight-reducing holes (413) at intervals.

5. The adjustable electromagnetic push rod according to claim 1, characterized in that: It also includes a vibration isolation rubber pad (44), which is fixedly arranged in the cavity and located between the permanent magnet (43) and the motion ring (41).

6. The adjustable electromagnetic push rod according to claim 1, characterized in that: It also includes a rubber limiting structure (6), which is fixedly arranged at one end of the accommodating cavity away from the electromagnet (5).

7. The adjustable electromagnetic push rod according to claim 1, characterized in that: It also includes a guide bearing (7), which is arranged between the push rod (2) and the housing (1).

8. The adjustable electromagnetic push rod according to claim 1, characterized in that: The push rod head (3) is connected to the push rod (2) via threads.

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