Linear motor, damping device, and vehicle

Abstract

The application provides a linear motor, a damping device and a vehicle. The linear motor comprises a first component, a second component and a sealing member. The first component comprises a guide rod and a first excitation member, and the first excitation member is arranged on the guide rod. The second component comprises a shell and a second excitation member, and the second excitation member is arranged on the shell. One of the first excitation member and the second excitation member is an electromagnetic coil, and the other is a permanent magnet or an electromagnet. The shell can move relative to the guide rod under the interaction of the first excitation member and the second excitation member. The shell is provided with an opening, and the guide rod is arranged in the opening. The sealing member is arranged on the guide rod, and the sealing member extends from the outer wall of the guide rod to the inner wall of the shell. In the axial direction of the guide rod, the projection of the sealing member at least partially overlaps the edge of the opening. According to the linear motor, the sealing effect is better, the linear motor is simple and compact in structure, occupies small space, and has good sealing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of linear motors, in particular to a linear motor, a damping device and a vehicle. BACKGROUND

[0002] The existing linear motor is susceptible to pollution of the external impurities, which affects the working life of the armature winding and even the working performance of the armature winding. SUMMARY

[0003] The technical problem to be solved by the present application is that the armature winding inside the linear motor is susceptible to pollution of the external impurities, which affects the working life and working performance of the armature winding.

[0004] To at least solve the above technical problem, the first aspect of the present application provides a linear motor, which comprises: a first component, the first component comprising a guide rod and a first excitation element, the first excitation element being arranged on the guide rod;

[0005] a second component, the second component comprising a housing and a second excitation element, the second excitation element being arranged on the housing, one of the first excitation element and the second excitation element being an electromagnetic coil, and the other being a permanent magnet or an electromagnet;

[0006] The housing is capable of moving relative to the guide rod under the interaction of the first excitation element and the second excitation element;

[0007] The housing is provided with an opening, and the guide rod is arranged in the opening;

[0008] A sealing element is arranged on the guide rod, the sealing element extending from the outer wall of the guide rod to the inner wall of the housing, in the axial direction of the guide rod, the projection of the sealing element at least partially overlaps with the edge of the opening, and the sealing element is capable of sealing the gap between the edge of the opening and the guide rod;

[0009] The sealing element extends to be in sliding contact with the inner wall of the housing.

[0010] According to the linear motor of the application, since the guide rod is arranged in the opening of the shell, a gap is inevitably formed between the opening of the shell and the guide rod, the sealing element arranged on the guide rod extends to the inner wall of the shell, and the projection of the sealing element at least partially overlaps the edge of the opening in the axial direction of the guide rod. The sealing element can seal the gap between the edge of the opening of the shell and the guide rod, and the sealing element extends to the sliding contact with the inner wall of the shell, so that the sealing element can seal the gap between the edge of the opening of the shell and the guide rod, thereby preventing dust and other impurities from entering the shell, thereby protecting the first excitation element and the second excitation element of the shell. The sliding contact between the extension structure of the sealing element and the inner wall of the shell can dynamically seal the gap between the guide rod and the shell, effectively prevent impurities from entering the shell, and the overlapping area of the projection of the sealing element and the edge of the opening ensures the sealing coverage range, avoids the limitation of the traditional static sealing, and effectively protects the electromagnetic coil. The linear motor of the application has better sealing effect, simple and compact structure, small space occupation and good sealing effect.

[0011] Optionally, the sealing element is located in the shell.

[0012] Optionally, the sealing element extends to the sliding contact with the inner wall of the shell.

[0013] Optionally, a groove is arranged on the sealing element, and the linear motor further comprises a sealing ring, which is installed in the groove.

[0014] Optionally, the shell further has a first end cover, the opening is formed on the first end cover, and the first end cover is adapted to contact the sealing element, so that the sealing element is formed as a first limiting element.

[0015] Optionally, the guide rod comprises a first guide part matched with the opening, and the outer diameter of at least part of the structure of the first guide part is smaller than the diameter of the opening.

[0016] Optionally, the outer diameter of the guide rod is smaller than the diameter of the opening.

[0017] Optionally, the diameter of the opening is smaller than the diameter of the first end cover.

[0018] Optionally, the shell further has a second end cover, the first end cover and the second end cover are arranged at intervals along the axial direction of the guide rod, and are formed at two ends of the shell, and the linear motor further comprises a buffer block, at least part of the buffer block is arranged on the guide rod, and the buffer block is located on the side of the first end cover away from the second end cover.

[0019] Optionally, the linear motor further comprises a second limiting element, which is arranged on the buffer block.

[0020] The distance from the second limiting piece to the second end cover is greater than the distance from the end of the buffer block close to the first end cover to the second end cover.

[0021] Optionally, in the radial direction of the guide rod, the second limiting piece extends outward from the buffer block.

[0022] Optionally, in the axial direction of the guide rod, the projection of the second limiting piece at least partially overlaps the projection of the first end cover.

[0023] Optionally, in the path of the movement of the shell relative to the guide rod, the first end cover can be in contact with the second limiting piece.

[0024] Optionally, the first end cover is further provided with a buffer piece.

[0025] Optionally, the buffer piece includes a first buffer piece and a second buffer piece, and the first buffer piece and the second buffer piece are respectively located on the inner and outer sides of the first end cover.

[0026] Optionally, the first buffer piece and the second buffer piece are an integral piece.

[0027] Optionally, the side of the first end cover facing the guide rod is provided with a third buffer piece.

[0028] Optionally, the first buffer piece, the second buffer piece, and the third buffer piece are an integral piece.

[0029] The second aspect of the present application provides a damping device, comprising the linear motor described above.

[0030] According to the damping device of the present application, since the sealing piece is arranged on the guide rod and extends to the inner wall of the shell, in the axial direction of the guide rod, the projection of the sealing piece at least partially overlaps the edge of the opening, so that the sealing piece can block the gap between the edge of the opening of the shell and the guide rod, thereby preventing dust and other impurities from the outside from entering the shell, and further protecting the first excitation piece and the second excitation piece in the shell, effectively protecting the electromagnetic coil. The damping device of the present application has better sealing effect, simple and compact structure, small space occupation, and good sealing effect.

[0031] The third aspect of the present application provides a vehicle comprising the damping device described above.

[0032] According to the automobile of the present application, the linear motor damping device has better sealing effect, can avoid dust and other impurities from the outside from entering the linear motor shell, thereby protecting the first excitation piece and the second excitation piece of the linear motor, effectively protecting the electromagnetic coil, and improving the performance of the automobile. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a linear motor-type electromagnetic vibration damper according to a preferred embodiment of this application;

[0034] Figure 2 yes Figure 1 A cross-sectional schematic diagram;

[0035] Figure 3 yes Figure 2 A partially enlarged structural diagram of the central sealing component.

[0036] The reference numerals in the accompanying drawings are as follows:

[0037] 1. First component; 10. Guide rod; 100. First guide part; 11. First excitation component; 2. Second component; 20. Housing; 200. Inner wall of housing; 201. First end cover; 202. Second end cover; 21. Second excitation component; 3. Opening; 4. Sealing component; 40. Groove; 400. Bottom wall of groove; 41. Sealing ring; 5. Buffer block; 6. Second limiting component; 7. Buffer component; 70. First buffer component; 71. Second buffer component; 72. Third buffer component; 8. Tower top; 80. Tower top bolt; 9. Lower fork arm; 90. Limit bolt; 91. Clamping bolt. Detailed Implementation

[0038] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0039] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0040] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0041] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0042] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0043] This application provides a linear motor suitable for vibration damping devices, such as... Figures 1 to 3 As shown, the linear motor includes a first component 1, which includes a guide rod 10 and a first excitation element 11, the first excitation element 11 being disposed on the guide rod 10; and a second component 2, which includes a housing 20 and a second excitation element 21, the second excitation element 21 being disposed on the housing 20. One of the first excitation element 11 and the second excitation element 21 is an electromagnetic coil, and the other is a permanent magnet or an electromagnet.

[0044] The housing 20 can move relative to the guide rod 10 under the interaction of the first excitation element 11 and the second excitation element 21;

[0045] The housing 20 is provided with an opening 3, and the guide rod 10 passes through the opening 3;

[0046] The seal 4 is disposed on the guide rod 10 and extends from the outer wall of the guide rod 10 to the inner wall 200 of the housing. In the axial direction of the guide rod 10, the projection of the seal 4 at least partially coincides with the edge of the opening 3.

[0047] According to the linear motor of this application, since the guide rod 10 passes through the opening 3 of the housing 20, a gap will inevitably exist between the opening 3 of the housing 20 and the guide rod 10. The sealing member 4, provided on the guide rod 10, extends towards the inner wall 200 of the housing, and the projection of the sealing member 4 in the axial direction of the guide rod 10 at least partially overlaps with the edge of the opening 3. This allows the sealing member 4 to seal the gap between the opening 3 of the housing 20 and the guide rod 10, thereby preventing external dust and other impurities from entering the housing 20 through the gap. This protects the first excitation element 11 and the second excitation element 21 of the housing 20, effectively protecting the electromagnetic coil. The linear motor of this application has a better sealing effect, and its structure is simple and compact, occupying little space and providing excellent sealing performance.

[0048] In one embodiment, such as Figure 2 As shown, the seal 4 is located inside the housing 20. When external impurities enter the housing 20 through the gap between the guide rod 10 and the edge of the opening 3 of the housing 20, the seal 4 is located inside the housing 20. The seal 4 extends from the outer wall of the guide rod 10 to the inner wall 200 of the housing. Furthermore, the projection of the seal 4 in the axial direction of the guide rod 10 at least partially coincides with the gap from the edge of the opening 3 to the guide rod 10. Therefore, the seal 4 can prevent impurities from further entering the first excitation element 11 and the second excitation element 21 inside the housing 20, thereby protecting the electromagnetic coil of the linear motor from contamination.

[0049] In other embodiments not shown in the figures, the seal 4 can also be provided at the opening 3 of the housing 20 to seal the gap between the edge of the opening 3 of the housing 20 and the guide rod 10, preventing foreign matter such as dust from the outside from entering the inside of the housing 20 to contaminate the electromagnetic coils of the linear motor, affecting the performance and service life of the linear motor.

[0050] In a detailed embodiment, inside the housing 20, the seal 4 extends from the outer wall of the guide rod 10 to the inner wall 200 of the housing, in sliding contact with the inner wall 200 of the housing. Since the diameter of the opening 3 is smaller than the diameter of the first end cover 201, when the seal 4 extends to the inner wall 200 of the housing and is in sliding contact with the inner wall 200 of the housing, it means that the guide rod 10 and the seal 4 on the guide rod 10 can close the opening 3 of the housing 20, better preventing foreign matter from the outside from entering the first excitation member 11 and the second excitation member 21 inside the housing 20, affecting the performance of the linear motor.

[0051] In an embodiment, as shown in Figure 2 The first excitation member 11 is a coil winding, and the second excitation member 21 is a permanent magnet group. When the coil winding is energized, the magnetic field generated interacts with the magnetic field of the permanent magnet group to generate action and reaction forces, i.e., the thrust of the linear motor. When the housing 20 moves relative to the guide rod 10 under the interaction of the coil winding and the permanent magnet, the seal 4 can also slide relative to the housing 20 to form a slidable sealing mechanism. The seal 4 is fixed on the outer wall of the guide rod 10 and does not occupy too much axial space of the guide rod 10, and the up and down movement of the guide rod 10 does not affect the stroke of the guide rod 10.

[0052] In an embodiment, as shown in Figure 2 The seal 4 is provided with a groove 40, and the linear motor further comprises a sealing ring 41 installed in the groove 40. Installing another sealing ring 41 in the groove 40 can achieve a double sealing effect, better preventing foreign matter from entering the inside of the linear motor to contaminate the coil winding of the linear motor.

[0053] In an embodiment, as shown in Figure 3 The opening 3 of the groove 40 faces the inner wall 200 of the housing to facilitate the installation of the sealing ring 41.

[0054] Specifically, as shown in Figure 3As shown, the sealing ring 41 is in the groove 40, one side of the sealing ring 41 is in sealing sliding contact with the inner wall 200 of the shell, and the other side of the sealing ring 41 is in contact with the groove bottom wall 400 of the sealing member 4. Both sides of the sealing ring 41 are extruded to a certain compression amount, the sealing ring 41 is uniformly compressed, thereby having a better sealing effect. The double sealing of the sealing ring 41 and the sealing member 4 effectively prevents impurities from the outside from entering the working cavity of the linear motor, thereby protecting the armature winding from pollution.

[0055] In an embodiment, as shown in Figure 2 The shell 20 also has a first end cover 201, and the opening 3 is formed on the first end cover 201, and the diameter of the opening 3 is smaller than the diameter of the first end cover 201. In the moving path of the shell 20 relative to the guide rod 10, the first end cover 201 can be in contact with the sealing member 4, and when the shell 20 moves to the position of the sealing member 4, the sealing member 4 can block the continuous movement of the shell 20, so that the sealing member 4 is formed as a first limiting member. The sealing member 4 not only has a sealing effect, but also is a limiting structure of the first limit position of the shell 20 relative to the moving path of the guide rod 10. Thus, the sealing member 4 has the dual effects of sealing and limiting.

[0056] In an embodiment, the guide rod 10 includes a first guide portion 100 matched with the opening 3, and the outer diameter of at least part of the structure of the first guide portion 100 is smaller than the diameter of the opening 3.

[0057] In the embodiment as shown in Figure 2 The first guide portion 100 of the guide rod 10 is an integral part with the part other than the first guide portion 100, the outer diameter of the guide rod 10 is smaller than the diameter of the opening 3, the guide rod 10 is arranged in the shell 20 through the opening 3 of the shell 20, so that there is a gap between the guide rod 10 and the edge of the opening 3.

[0058] In other embodiments not shown in the figures, the first guide portion 100 of the guide rod 10 is smaller than the diameter of the opening 3, and the part (not shown in the figure) of the guide rod 10 other than the first guide portion 100 can be greater than or equal to the diameter of the opening 3.

[0059] In an embodiment, as shown in Figure 2As shown, the housing 20 also has a second end cap 202, with the first end cap 201 and the second end cap 202 arranged axially at both ends of the housing 20 along the guide rod 10. The linear motor also includes a buffer block 5, at least a portion of which is disposed on the guide rod 10, and the buffer block 5 is located on the side of the first end cap 201 away from the second end cap 202. In one embodiment, the buffer block 5 is disposed on the guide rod 10 and is connected to the tower top 8, that is, both the guide rod 10 and the buffer block 5 are connected to the tower top 8 (here, the tower top 8 is applicable to the explanation of the tower top 8 in the following section), to mitigate the vibration and noise generated by the collision. The shape and material of the buffer block 5 are not specifically limited here, and those skilled in the art can select them according to the needs of actual production applications.

[0060] In other embodiments not shown in the figures, the buffer block 5 may be partially fixed to the guide rod 10 and partially fixed to the tower top 8.

[0061] In one embodiment, such as Figure 2 As shown, the linear motor also includes a second limiting member 6, which is disposed on the buffer block 5. The distance from the second limiting member 6 to the second end cover 202 is greater than the distance from the end of the buffer block 5 closest to the first end cover 201 to the second end cover 202, that is, the second limiting member 6 is higher than the bottom surface of the buffer block 5. At the same time, in the radial direction of the guide rod 10, the second limiting member 6 extends outward from the buffer block 5. In the axial direction of the guide rod 10, the projection of the second limiting member 6 at least partially overlaps with the projection of the first end cover 201. Since the diameter of the opening 3 on the first end cover 201 is smaller than the diameter of the first end cover 201, that is, in the axial direction of the guide rod 10, the projection of the second limiting member 6 can completely overlap with at least part of the first end cover 201, so that in the path of the housing 20 moving relative to the guide rod 10, the first end cover 201 can contact the second limiting member 6 and block the continued movement of the housing 20. The second limiting member 6 constitutes the second limit position of the linear motor vibration damping device. Meanwhile, in the prior art, the displacement of the housing 20 toward the tower top 8 is limited by the contact between the top wall of the housing 20 and the bottom wall of the buffer block 5 (i.e., the side of the buffer block 5 facing the second end cover 202). However, in this application, the top wall of the housing 20 is adapted to contact the bottom wall of the buffer block 5 further up (away from the second end cover 202). Therefore, the stroke of the shock absorber is changed from the distance from the housing 20 to the buffer block 5 to the distance from the housing 20 to the second limiting member 6, thereby increasing the stroke of the shock absorber.

[0062] In one embodiment, such as Figure 2 As shown, a buffer 7 is also provided on the first end cap 201. The buffer 7 is adapted to contact the limiting member to avoid damage and noise caused by contact limiting.

[0063] Furthermore, the buffer 7 includes a first buffer 70 and a second buffer 71, which are located on the inner and outer sides of the first end cap 201, respectively. The end of the first end cap 201 furthest from the second end cap 202 is the outer side of the first end cap 201, and the end of the first end cap 201 closer to the second end cap 202 is the inner side of the first end cap 201.

[0064] In a detailed embodiment, the first buffer 70 and the second buffer 71 are integral.

[0065] like Figure 2 As shown, a third buffer 72 is also provided on the side of the first end cap 201 facing the guide rod 10.

[0066] In one embodiment, the first buffer 70, the second buffer 71, and the third buffer 72 are integrated as a single unit.

[0067] When the housing 20 moves to the set second limit position, the first buffer 70, the second buffer 71, the third buffer 72, the second limiter 6, and the buffer block 5 work together to reduce the impact and noise generated by the collision.

[0068] This application also provides a vibration damping device, including the linear motor described above.

[0069] In one embodiment, one of the guide rods 10 and housings 20 is adapted to be connected to the vehicle body, and the other of the guide rods 10 and housings 20 is adapted to be connected to the wheel.

[0070] In a detailed embodiment, such as Figure 1 As shown, the vibration damping device also includes a tower top 8 and a lower fork arm 9. The tower top 8 is connected to the guide rod 10, and the tower top bolt 80 is press-fitted to the tower top 8 as a whole. The vibration damping device is connected to the tower top seat on the vehicle body or frame through the tower top bolt 80. The lower fork arm 9 is installed and fixed together with the second end cover 202 of the housing 20 by the limiting bolt 90, the clamping bolt 91, and the clamping nut. A connecting ring is provided on the lower fork arm 9 for wheel connection.

[0071] This application also provides a vehicle including the aforementioned shock absorber. According to the vehicle of this application, because the shock absorber integrates the seal 4 with the limiting structure, it saves the axial space of the linear motor shock absorber. Under the same stroke setting, the shock absorber height can be reduced, thereby saving chassis space; or, under the same shock absorber height condition, the shock absorber stroke can be increased, thereby improving vehicle passability.

[0072] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the term "set" can mean either a component is directly attached to another component or a component is attached to another component through an intermediate component. The features described in one embodiment can be applied to another embodiment, either individually or in combination, unless the features are not applicable or are otherwise stated.

[0073] The application has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the application to the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present application, which all fall within the scope of the application claimed.

Claims

1. A linear motor, characterized by, The linear motor comprises: a first component comprising a guide rod and a first excitation element arranged on the guide rod; a second component comprising a housing and a second excitation element arranged on the housing, one of the first excitation element and the second excitation element being an electromagnetic coil and the other being a permanent magnet or an electromagnet; the housing is capable of moving relative to the guide rod under the interaction of the first excitation element and the second excitation element; the housing is provided with an opening in which the guide rod is arranged; a sealing element arranged on the guide rod, the sealing element extending from the outer wall of the guide rod to the inner wall of the housing, in the axial direction of the guide rod, the projection of the sealing element at least partially overlaps with the edge of the opening, and the sealing element is capable of sealing the gap between the edge of the opening and the guide rod; the sealing element extends to be in sliding contact with the inner wall of the housing.

2. The linear motor of claim 1, wherein The sealing element is located in the housing.

3. Linear motor according to any of claims 1 or 2, characterized in that The sealing element is provided with a groove, and the linear motor further comprises a sealing ring installed in the groove.

4. The linear motor of claim 3, wherein The opening of the groove faces the inner wall of the housing.

5. The linear motor of claim 4, wherein One side of the sealing ring is in sealing sliding contact with the inner wall of the housing, and the other side of the sealing ring is in contact with the bottom wall of the groove of the sealing element.

6. The linear motor of claim 1, wherein The housing further has a first end cover, the opening is formed on the first end cover, and during the relative movement of the housing and the guide rod, the first end cover can be in contact with the sealing element to form the sealing element into a first limiting element.

7. The linear motor of claim 6, wherein The guide rod comprises a first guide portion matched with the opening, and at least part of the structure of the first guide portion has an outer diameter smaller than the diameter of the opening.

8. The linear motor of claim 7, wherein The outer diameter of the guide rod is smaller than the diameter of the opening.

9. The linear motor of claim 6, wherein, The diameter of the opening is smaller than the diameter of the first end cover.

10. The linear motor of claim 6, wherein, The housing has a second end cover, the first end cover and the second end cover are arranged at the two ends of the housing along the axial direction of the guide rod, and the linear motor further comprises a buffer block, at least part of the buffer block is arranged on the guide rod, and the buffer block is located on the side of the first end cover away from the second end cover.

11. The linear motor of claim 10, wherein, The linear motor further comprises a second limiting element arranged on the buffer block. The distance from the second limiting element to the second end cover is greater than the distance from one end of the buffer block close to the first end cover to the second end cover.

12. The linear motor of claim 11, wherein, In the radial direction of the guide rod, the second limiting element extends outward from the buffer block.

13. The linear motor of claim 11, wherein, In the axial direction of the guide rod, the projection of the second limiting element at least partially overlaps with the projection of the first end cover.

14. The linear motor of claim 13, wherein, In the path of the movement of the housing relative to the guide rod, the first end cover can be in contact with the second limiting element.

15. The linear motor of claim 14, wherein, The first end cover is further provided with a buffer element.

16. The linear motor of claim 15, wherein, The buffer element comprises a first buffer element and a second buffer element, and the first buffer element and the second buffer element are respectively located on the inner and outer sides of the first end cover.

17. The linear motor of claim 16, wherein, The first buffer element and the second buffer element are an integral part.

18. The linear motor of claim 16, wherein, The side of the first end cover facing the guide rod is provided with a third buffer element.

19. The linear motor of claim 18, wherein, The first buffer, the second buffer and the third buffer are integrated.

20. A vibration damping device characterized by comprising: The linear motor of any one of claims 1-19, wherein one of the guide rods is adapted to be connected to a vehicle body and the other of the guide rods is adapted to be connected to a wheel.

21. A vehicle characterized by The damping device of claim 20.

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