Electromagnetic head structure and shock absorber

Abstract

The embodiment of the utility model discloses an electromagnetic head structure and a shock absorber. The electromagnetic head structure comprises a sleeve, an armature and a push rod. The sleeve is provided with a guide channel and a containing cavity which are communicated; the armature comprises a main body part and an abutting part, and is arranged in the accommodating cavity in a sliding manner through the main body part; the push rod is arranged in the guide channel, and part of the push rod extends into the accommodating cavity; the end face of one side of the abutting part is an arc-shaped plane, and the circle center corresponding to the arc-shaped plane is located in the axis direction of the guide channel. The abutting part abuts against the push rod through the arc-shaped plane so that the push rod can slide in the axis direction. According to the electromagnetic head structure, even if the abutting part and the push rod generate tiny angle deviation, the contact point of the abutting part and the push rod moves to different positions on the arc-shaped plane, the normal of the contact point always faces the axis direction of the guide channel, then the thrust direction can be automatically corrected to be the axial direction, and therefore the phenomenon that the push rod is pushed to deviate cannot occur; and clamping stagnation or abrasion of the push rod cannot be caused.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an electromagnetic head structure and a shock absorber. Background Technology

[0002] Electromagnetic heads are widely used in hydraulic shock absorbers, automatic control valves, and other fields to achieve precise drive control. In traditional electromagnetic head structures, the armature and push rod typically transmit driving force through planar contact or direct end-face abutment. However, due to installation deviations or minute displacements during operation, the thrust direction often becomes skewed, causing push rod misalignment, jamming, or impact. This affects the linear sliding accuracy of the push rod and the overall electromagnetic execution efficiency, and may even shorten the lifespan of the electromagnetic head.

[0003] Therefore, there is an urgent need for a new electromagnetic head structure and shock absorber. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an electromagnetic head structure and a shock absorber. In this electromagnetic head structure, even if the supporting part and the push rod are slightly offset at an angle, the contact point of the two moves to different positions on the arc plane. The normal of the contact point is always facing the axis of the guide channel, and the thrust direction will be automatically corrected to the axial direction, so as not to push the push rod off-center, and thus not to cause the push rod to jam or wear.

[0005] This utility model discloses an electromagnetic head structure, including:

[0006] The sleeve has a connecting guide channel and a receiving chamber;

[0007] An armature, comprising a main body and a supporting portion, and slidably disposed within the receiving chamber via the main body; and

[0008] A push rod is arranged in the guide channel, and a portion of the push rod extends into the receiving chamber;

[0009] One end face of the abutment is an arc-shaped plane, and the center of the arc-shaped plane is located in the axial direction of the guide channel; through the arc-shaped plane, the abutment abuts against the push rod, so that the push rod can slide along the axial direction.

[0010] Furthermore, the abutment portion is connected to a portion of one side end face of the main body portion and is located at the center of that side end face of the main body portion.

[0011] Furthermore, the push rod includes a main body section and a limiting section. The main body section is located within the guide channel. One end of the limiting section is connected to the main body section, and the other end abuts against the supporting part. The diameter of the limiting section is larger than the aperture of the guide channel.

[0012] Furthermore, the radial plane is defined as the projection reference plane, the projection of the supporting part on the projection reference plane is the first projection, the projection of the limiting segment on the projection reference plane is the second projection, and the second projection completely covers the first projection.

[0013] Furthermore, the guide channel is provided with a stepped portion, so as to at least define the guide channel into a first channel and a second channel with different apertures, defining the channel on the oil inlet side as the first channel and the channel on the other side as the second channel, and the first gap between the first channel and the push rod is greater than the second gap between the second channel and the push rod.

[0014] Furthermore, the step portion has a ring-shaped structure, and the outer wall surface of the step portion is integrally formed with the guide channel, while the inner wall surface of the step portion itself cooperates to form the second channel.

[0015] Furthermore, the axial length of the first channel is a first length, and the axial length of the second channel is a second length, wherein the second length is greater than the first length.

[0016] Furthermore, an annular groove is provided at the middle position of the stepped portion and / or at the middle position of the armature to balance the oil pressure.

[0017] Furthermore, the cross-section of the annular groove includes an arc shape, a square shape, or a triangle shape.

[0018] Furthermore, it also includes a housing and a coil, with the sleeve located inside the housing and the coil arranged between the housing and the sleeve.

[0019] This utility model embodiment also discloses a shock absorber, including the electromagnetic head structure as described above.

[0020] The electromagnetic head structure and shock absorber provided by this utility model have the following beneficial effects, including but not limited to:

[0021] 1) By arranging a support part with an arc-shaped plane, even if the support part and the push rod are slightly offset at an angle, the contact point of the two moves to different positions on the arc-shaped plane. The normal of the contact point is always facing the axis of the guide channel, and the direction of the thrust will be automatically corrected to the axial direction, so as not to push the push rod off-center, and thus not to cause the push rod to jam or wear.

[0022] 2) In this electromagnetic head structure, the supporting part only connects to a part of the end face of the main body, avoiding full coverage, which can reduce structural complexity, avoid occupying unnecessary space, and facilitate miniaturization design; at the same time, the supporting part is located in the middle of the end face, that is, in the area around the axis, and its contact point is close to the axis of the main body, so the thrust is more uniform and concentrated, which can ensure more accurate force transmission direction and further reduce the risk of eccentricity or deflection. Attached Figure Description

[0023] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0024] Figure 1 This is a schematic diagram of the electromagnetic head structure provided in an embodiment of the present utility model;

[0025] Figure 2 A cross-sectional view of the electromagnetic head structure provided in an embodiment of this utility model;

[0026] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0027] Figure 4 This is a cross-sectional view of an electromagnetic head structure provided in another embodiment of the present invention.

[0028] Icons: 100-Electromagnetic head structure; 10-Sleeve; 101-Guide channel; 1011-First channel; 1012-Second channel; 1014-Step section; 1041-Annular groove; 102-Accommodating chamber; 11-Armature; 111-Main body; 112-Supporting part; 12-Push rod; 121-Main body section; 122-Limiting section; 13-Housing shell. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] Please refer to Figures 1-4 , Figure 1 This is a schematic diagram of the electromagnetic head structure 100 provided in an embodiment of the present utility model; Figure 2 A cross-sectional view of the electromagnetic head structure 100 provided in an embodiment of this utility model; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a cross-sectional view of an electromagnetic head structure 100 provided in another embodiment of the present invention. The present invention provides an electromagnetic head structure 100, which includes a sleeve 10, an armature 11, and a push rod 12. The sleeve 10 has a connecting guide channel 101 and a receiving chamber 102; the armature 11 includes a main body 111 and a supporting part 112, and is slidably disposed in the receiving chamber 102 via the main body 111; the push rod 12 is arranged in the guide channel 101, and a portion of the push rod 12 extends into the receiving chamber 102; wherein, one end face of the supporting part 112 is an arc-shaped plane, and the center of the arc-shaped plane is located in the axial direction of the guide channel 101; through the arc-shaped plane, the supporting part 112 abuts against the push rod 12, so that the push rod 12 can slide along the axial direction.

[0032] It should be noted that the axial direction of the guide channel 101 in this embodiment is the left-right direction, which can be as follows: Figure 2 As shown.

[0033] It is worth noting that the electromagnetic head structure 100, by arranging a support portion 112 with an arc-shaped plane, ensures that even if the support portion 112 and the push rod 12 are slightly offset at an angle, and their contact point moves to different positions on the arc-shaped plane, the normal of the contact point always faces the axial direction of the guide channel 101. Consequently, the thrust direction will be automatically corrected to the axial direction, thus preventing the push rod 12 from being pushed off-center and avoiding jamming or wear of the push rod 12.

[0034] Please refer to this again. Figure 2 The supporting part 112 is connected to a portion of one side end face of the main body 111 and is located in the middle of one side end face of the main body 111.

[0035] It is worth noting that in the electromagnetic head structure 100, the supporting part 112 only connects to a part of the end face of the main body 111, avoiding full coverage, thereby reducing structural complexity, avoiding unnecessary space occupation, and facilitating miniaturization design; at the same time, the supporting part 112 is located in the middle of the end face, that is, in the area around the axis, and its contact point is close to the axis of the main body 111, so the thrust is more evenly concentrated, which can ensure more accurate force transmission direction and further reduce the risk of eccentricity or deflection.

[0036] In this embodiment, the push rod 12 includes a main body section 121 and a limiting section 122. The main body section 121 is located in the guide channel 101. One end of the limiting section 122 is connected to the main body section 121, and the other end abuts against the supporting part 112. The diameter of the limiting section 122 is larger than the aperture of the guide channel 101.

[0037] It is understandable that the diameter of the limiting section 122 is larger than the aperture of the guide channel 101, that is, the diameter of the limiting section 122 is larger than the aperture of the first channel 1011 and also larger than the aperture of the second channel 1012. At this time, the limiting section 122 can play a limiting role to prevent the push rod 12 from sliding down into the receiving chamber 102.

[0038] Optionally, the radial plane is defined as the projection reference plane, the projection of the supporting part 112 on the projection reference plane is the first projection, and the projection of the limiting segment 122 on the projection reference plane is the second projection, the second projection completely covering the first projection. Figure 2 As shown, the radial plane refers to the plane containing the vertical direction perpendicular to the axial direction. It can also be understood that the second projection completely covers the first projection, that is, the projection of the supporting part 112 completely coincides with the projection of the limiting segment 122, or the projection of the supporting part 112 is wrapped by the projection of the limiting segment 122.

[0039] Specifically, the above structural arrangement can effectively avoid the problem that the supporting part 112 cannot be effectively connected with the limiting section 122 due to the radial offset of the supporting part 112, thereby preventing the failure of thrust transmission or the failure of the electromagnetic head to operate.

[0040] In this embodiment, a stepped portion is provided in the guide channel 101 so as to at least define the guide channel 101 into a first channel 1011 and a second channel 1012 with different apertures. The channel on the oil inlet side is defined as the first channel 1011 and the channel on the other side is defined as the second channel 1012. The first gap between the first channel 1011 and the push rod 12 is greater than the second gap between the second channel 1012 and the push rod 12.

[0041] It is worth noting that the electromagnetic head structure 100, by setting a stepped portion in the guide channel 101, can limit the guide channel 101 to form a first channel 1011 and a second channel 1012 with different apertures. The first gap between the first channel 1011 and the push rod 12 is larger, which can ensure the normal entry of oil. The second gap between the second channel 1012 and the push rod 12 is narrower, which can increase the resistance of high-pressure oil in the guide channel 101, thereby reducing oil leakage. At the same time, this structure does not require additional sealing gaskets, so there is no risk of seal failure.

[0042] It should be understood that the side of the oil inlet mentioned in this embodiment is... Figure 2 The side marked in the image is the inlet area after the high-pressure oil enters the channel.

[0043] In this embodiment, the step portion is a ring structure, and the outer wall surface of the step portion is integrally formed with the guide channel 101, while the inner wall surface of the step portion itself cooperates to form the second channel 1012.

[0044] It is worth noting that the stepped portion adopts a ring-shaped structure, and its outer wall is integrally formed with the guide channel 101. This enhances the connection strength between the stepped portion and the guide channel 101, simplifies the processing technology, reduces assembly steps, and improves production efficiency. Simultaneously, it avoids performance inconsistencies that may arise due to fitting errors during assembly. Depending on the specific implementation environment, the stepped portion can also be a wedge-shaped structure with a certain slope, as long as it ensures that the high-pressure oil has a side with a smaller gap during flow. This embodiment does not constitute a limitation on the specific structural type of the stepped portion.

[0045] In this embodiment, the axial length of the first channel 1011 is a first length, and the axial length of the second channel 1012 is a second length, the second length being greater than the first length. It can be understood that the axial length in this embodiment refers to... Figure 2 The length in the axial direction shown.

[0046] It is worth noting that by setting a longer second gap, the electromagnetic head structure 100 can effectively reduce the wear of the push rod 12 and the sealing element, thereby improving the service life of the electromagnetic head.

[0047] Please refer to Figure 2 and Figure 4 An annular groove 1014 is provided at the middle position of the step portion and / or at the middle position of the armature 11 for balancing oil pressure.

[0048] It is worth noting that in different embodiments of this example, an annular groove 1014 step portion 10411014 is provided at the middle position of the stepped portion or the middle position of the push rod 12 to balance the oil pressure. It can be understood that the middle position of the stepped portion here refers to the center position of the second channel 1012, which provides better oil pressure balancing. Depending on the specific implementation environment, it can also be set slightly to the left or right to adapt to different push rod 12 structures. Meanwhile, in another embodiment, an annular groove 1014 step portion 1041 can be provided in the middle of the push rod 12. Compared to providing the annular groove 1014 step portion 1041 at the middle position of the stepped portion, it has the technical characteristics of being easier to process, having lower manufacturing costs, and being more conducive to industrial promotion.

[0049] It is also worth noting that when the push rod 12 moves within the guide channel 101, especially when entering the second channel 1012 from the first channel 1011, the oil is compressed or flows rapidly, which can lead to a local pressure increase. The step portion 1041 of the annular groove 1014 provides additional volume to accommodate excess oil, thereby alleviating the pressure increase and balancing the pressure. In addition, the annular groove improves the flow characteristics of the oil near the step portion, allowing the oil to flow more smoothly between the groove and the channel, preventing pressure accumulation caused by poor oil flow.

[0050] In this embodiment, the annular groove 1014 has a stepped portion; the cross-section of 1041 includes an arc shape, a square shape, or a triangle shape.

[0051] Understandably, an arc-shaped cross-section can guide the flow of high-pressure oil more naturally, reducing the formation of turbulence and eddies, thereby lowering hydraulic resistance. Simultaneously, the arc-shaped surface can distribute the oil pressure more evenly, avoiding localized high-pressure points that might be caused by sharp corners or right angles. Depending on the specific implementation environment, square, triangular, or other shaped annular grooves can be used.

[0052] Furthermore, it also includes a housing 13 and a coil (not shown in the figure), with a sleeve 10 located inside the housing 13 and the coil arranged between the housing 13 and the sleeve 10.

[0053] This embodiment also provides a shock absorber having the above-described electromagnetic head structure 100 and having all of its beneficial effects.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0055] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0056] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention shown herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0057] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0058] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0059] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0060] The above description of the embodiments shown in this utility model (including the content in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of the utility model, and such modifications will be within the spirit and scope of the utility model.

[0061] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. An electromagnetic head structure, characterized in that, include: The sleeve has a connecting guide channel and a receiving chamber; An armature includes a main body and a supporting part, and is slidably disposed in the receiving chamber via the main body; as well as A push rod is arranged in the guide channel, and a portion of the push rod extends into the receiving chamber; One end face of the abutment is an arc-shaped plane, and the center of the arc-shaped plane is located in the axial direction of the guide channel; through the arc-shaped plane, the abutment abuts against the push rod, so that the push rod can slide along the axial direction.

2. The electromagnetic head structure according to claim 1, characterized in that, The abutment portion is connected to a portion of one side end face of the main body and is located at the middle of that side end face of the main body.

3. The electromagnetic head structure according to claim 1, characterized in that, The push rod includes a main body section and a limiting section. The main body section is located in the guide channel. One end of the limiting section is connected to the main body section, and the other end abuts against the supporting part. The diameter of the limiting section is larger than the diameter of the guide channel.

4. The electromagnetic head structure according to claim 3, characterized in that, The radial plane is defined as the projection reference plane. The projection of the supporting part on the projection reference plane is the first projection, and the projection of the limiting segment on the projection reference plane is the second projection. The second projection completely covers the first projection.

5. The electromagnetic head structure according to claim 1, characterized in that, The guide channel is provided with a stepped portion, which can at least define the guide channel to form a first channel and a second channel with different apertures. The channel on the oil inlet side is defined as the first channel, and the channel on the other side is defined as the second channel. The first gap between the first channel and the push rod is greater than the second gap between the second channel and the push rod.

6. The electromagnetic head structure according to claim 5, characterized in that, The step portion has a ring-shaped structure, and the outer wall surface of the step portion is integrally formed with the guide channel, while the inner wall surface of the step portion itself cooperates to form the second channel.

7. The electromagnetic head structure according to claim 5, characterized in that, The axial length of the first channel is a first length, and the axial length of the second channel is a second length, the second length being greater than the first length.

8. The electromagnetic head structure according to claim 5, characterized in that, An annular groove is provided at the middle position of the stepped portion and / or at the middle position of the armature to balance the oil pressure.

9. The electromagnetic head structure according to claim 8, characterized in that, The cross-section of the annular groove can be arc-shaped, square, or triangular.

10. The electromagnetic head structure according to claim 1, characterized in that, It also includes a housing and a coil, with the sleeve located inside the housing and the coil arranged between the housing and the sleeve.

11. A shock absorber, characterized in that, Includes the electromagnetic head structure as described in any one of claims 1-10.

Images