Linear motor, suspension and vehicle

Abstract

The utility model belongs to the technical field of linear motors, and relates to a linear motor, a suspension and a vehicle. The linear motor comprises a first main body and a second main body, wherein the second main body can move relative to the first main body relative to the axial direction of the first main body; the first main body comprises a first magnet, the second main body comprises a shell, an end cover and a second magnet, the first main body is sleeved with the shell, the second magnet is arranged on the shell, the end cover is detachably connected to the shell, and the end cover is detachably connected to the shell. An accommodating space of at least part of the first main body is formed between the shell and the end cover; one of the first magnet and the second magnet is a coil, and the other one is a permanent magnet or an electromagnet. According to the linear motor, the first main body and the second main body can be conveniently mounted, and the precision of the mounting position is ensured.

Description

[0001] The present application claims priority to the Chinese patent application No. 202311869920.2, filed on December 29, 2023, and entitled "Linear motor, suspension and vehicle", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The utility model belongs to linear motor technical field, especially, it is a kind of linear motor, suspension and vehicle. BACKGROUND

[0003] In prior art, cylindrical linear motor generally includes stator, mover and guiding mechanism, however, the existing linear motor assembly is more cumbersome, and the assembly efficiency is low. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem that the existing cylindrical linear motor shell is difficult to ensure the accuracy of the installation position of the guiding mechanism, and provides a linear motor, a suspension and a vehicle.

[0005] To solve the above technical problems, on the one hand, the utility model embodiment provides a kind of linear motor, including first body and second body, the second body can be relative to the axial movement of the first body relative to the first body;

[0006] The first body includes a first magnet, and the second body includes a shell, an end cover and a second magnet, the shell is sleeved on the first body, the second magnet is arranged in the shell, and the end cover is detachably connected to the shell to form a containing space of the first body between the shell and the end cover;

[0007] The guiding mechanism is arranged between the first body and the second body.

[0008] One of the first magnet and the second magnet is a coil, and the other is a permanent magnet or an electromagnet.

[0009] According to the linear motor embodiment of the utility model, the shell of the second body is divided into a shell and an end cover, so as to facilitate the installation of the first body and the second body, improve the assembly efficiency and ensure the installation accuracy.

[0010] Optionally, it further includes a guiding mechanism, and the guiding mechanism is arranged between the first body and the second body.

[0011] The guiding mechanism includes a second sliding bearing, and the second sliding bearing is arranged at the connection between the shell and the end cover.

[0012] Optionally, the guide mechanism further comprises a first sliding bearing, which is arranged at one end of the housing away from the end cover.

[0013] Optionally, the housing comprises a first mounting portion and a second mounting portion connected to the first mounting portion, a first through hole is formed on the first mounting portion, a second through hole is formed on the second mounting portion and communicates with the first through hole, the first through hole has a smaller radial dimension along the first body than the second through hole, and the second magnet is arranged on the second mounting portion and located in the second through hole; the end cover is mounted on a side of the second mounting portion away from the first mounting portion.

[0014] Optionally, the first sliding bearing is arranged at the first mounting portion, and the second sliding bearing is arranged on the second mounting portion.

[0015] Optionally, the first sliding bearing is located in the first through hole, and the second sliding bearing is located in the second through hole.

[0016] Optionally, the first through hole comprises a first hole section and a second hole section, the second hole section is connected between the first hole section and the second through hole, the first hole section has a smaller radial dimension along the first body than the second hole section, and the first sliding bearing is located in the second hole section.

[0017] Optionally, the second magnet is located on a side of the second sliding bearing away from the end cover.

[0018] Optionally, the second magnet is located between the first sliding bearing and the second sliding bearing in the axial direction of the first body.

[0019] Optionally, the guide mechanism further comprises a bearing limiting block, which is mounted between the second mounting portion and an outer ring of the second sliding bearing.

[0020] Optionally, the second magnet is located between the first mounting portion and the bearing limiting block.

[0021] Optionally, the first through hole and the second through hole are both circular in cross section along the radial direction of the first body.

[0022] Optionally, the first through hole has a smaller hole diameter than the second through hole.

[0023] Optionally, the end cover is provided with an extension groove recessed away from the housing; an inner cavity of the housing communicates with the extension groove to form the accommodation space.

[0024] In another aspect, the utility model discloses a suspension, which comprises the linear motor.

[0025] In another aspect, the utility model discloses a vehicle, which comprises the linear motor or the suspension. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a schematic diagram of a linear motor according to an embodiment of the utility model;

[0027] Figure 2 Fig. 2 is a schematic diagram of the linear motor in Fig. 1 when the second body is retracted; Figure 1 Fig. 3 is an assembly schematic diagram of a middle shell and a first sliding bearing;

[0028] Figure 3 Fig. 4 is an assembly schematic diagram of the middle shell and a second sliding bearing; Figure 2 Fig. 5 is an assembly schematic diagram of the middle shell and a second magnet;

[0029] Figure 4 Fig. 6 is an assembly schematic diagram of the middle shell and a first body; Figure 3 Fig. 7 is an assembly schematic diagram of the middle shell and a second body;

[0030] Figure 5 Fig. 8 is an assembly schematic diagram of the middle shell and a bearing limiting block; Figure 4 Fig. 9 is an assembly schematic diagram of the middle shell and an end cover;

[0031] Figure 6 Fig. 10 is an assembly schematic diagram of the linear motor in Fig. 1 when the second body is extended; Figure 5 Fig. 11 is an assembly schematic diagram of the linear motor in Fig. 1 when the second body is retracted;

[0032] Figure 7 Fig. 12 is an assembly schematic diagram of the linear motor in Fig. 1 when the second body is extended. Figure 1

[0033] Figure 8 Figure 1

[0034] Reference signs in the specification are as follows:

[0035] 1, first body; 11, first magnet; 12, iron core;

[0036] 2, second body; 21, shell; 211, first mounting portion; 2111, first via hole; 2111a, first hole segment; 2111b, second hole segment; 212, second mounting portion; 2121, second via hole; 22, end cover; 221, extension slot; 23, second magnet;

[0037] 3, guide mechanism; 31, first sliding bearing; 32, second sliding bearing; 33, bearing limiting block. DETAILED DESCRIPTION

[0038] ​​​In order to make the technical problems, technical schemes and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not used to limit the utility model.

[0039] As Figures 1 to 8 shown, the utility model embodiment provides linear motor, including first body 1, second body 2 and guiding mechanism 3, second body 2 is set on first body 1 and forms air gap between first body 1, second body 2 can be relative first body 1 movement along the axial direction of first body 1, first body 1 includes first magnet 11, second body 2 includes shell 21, end cover 22 and second magnet 23, shell 21 is set on first body 1, shell 21 is cylindrical, second magnet 23 is attached to the inner wall of shell 21, end cover 22 is detachably connected in shell 21, so that the accommodation space of at least part of first body 1 is formed between shell 21 and end cover 22.

[0040] Guiding mechanism 3 is arranged between first body 1 and second body 2.

[0041] The utility model embodiment provides linear motor, by splitting the outer shell of second body 2 into shell 21 and end cover 22 two parts, so as to install first body 1, second body 2 and guiding mechanism 3, ensure the accuracy of the installation position of guiding mechanism 3.

[0042] In an embodiment, as Figure 2 shown, shell 21 includes first mounting portion 211 and second mounting portion 212 connected with first mounting portion 211, first mounting portion 211 is formed with first via hole 2111, second mounting portion 212 is formed with second via hole 2121 communicated with first via hole 2111, the size of first via hole 2111 along the radial direction of first body 1 is less than the size of second via hole 2121 along the radial direction of first body 1, second magnet 23 is attached to second mounting portion 212 and located in second via hole 2121.

[0043] Because the size of first via hole 2111 along the radial direction of first body 1 is less than the size of second via hole 2121 along the radial direction of first body 1, after second magnet 23 is attached to second mounting portion 212, second magnet 23 is not easy to fall off from first via hole 2111. First via hole 2111 is communicated with the space surrounded by second magnet 23 in second via hole 2121, so that first body 1 passes through.

[0044] Furthermore, the end cap 22 is installed on the side of the second mounting part 212 facing away from the first mounting part 211. At this time, the end cap 22 is located on the side of the second through hole 2121 facing away from the first through hole 2111, thereby blocking one end opening of the housing 21 from the side of the second through hole 2121, while ensuring that the guide mechanism 3 will not fall off from this side.

[0045] In one embodiment, such as Figure 2 As shown, the cross-section of the first through hole 2111 along the radial direction of the first body 1 and the cross-section of the second through hole 2121 along the radial direction of the first body 1 are both circular. The diameter of the first through hole 2111 is smaller than the diameter of the second through hole 2121 to ensure the stability of the internal structure installation.

[0046] In one embodiment, such as Figure 1 As shown, the guide mechanism 3 includes a first sliding bearing 31 and a second sliding bearing 32. The first sliding bearing 31 is disposed at the end of the housing 21 away from the end cover 22, and the second sliding bearing 32 is disposed at the connection between the housing 21 and the end cover 22. This arrangement, with the two sliding bearings respectively positioned at both ends of the housing 21 along the axial direction of the first body 1, makes the relative movement between the second body 2 and the first body 1 smoother. Furthermore, the clever placement of the second sliding bearing at the connection between the housing 21 and the end cover 22 facilitates assembly.

[0047] In one embodiment, such as Figure 1 As shown, the first sliding bearing 31 is disposed at the first mounting part 211, and the second sliding bearing 32 is disposed on the second mounting part 212, thereby realizing the installation of two sliding bearings.

[0048] Specifically, the first sliding bearing 31 is located within the first through hole 2111, and the second sliding bearing 32 is located within the second through hole 2121. The outer ring of the first sliding bearing 31 is mounted on the wall of the first through hole 2111, and the inner ring of the first sliding bearing 31 is in sliding contact with the first body 1. The outer ring of the second sliding bearing 32 is mounted on the wall of the second through hole 2121, and the inner ring of the second sliding bearing 32 is in sliding contact with the first body 1.

[0049] Preferably, both the first sliding bearing 31 and the second sliding bearing 32 are single-layer annular structures, and their inner rings must be wear-resistant and smooth. By ensuring that the inner rings of each sliding bearing are in sliding contact with the outer surface of the first body 1, the sliding direction of the second body 2 is guaranteed, while ensuring the existence of an air gap between the first body 1 and the second body 2, thus preventing friction between the first body 1 and the second body 2.

[0050] In one embodiment, during operation of the linear motor, the movement of the second body 2 relative to the first body 1 includes retraction (e.g., Figure 7 (as shown) and extend (as shown) Figure 8 As shown, the extension length is determined by the usage environment or limited by external devices; it will not be extended indefinitely. Specifically, as... Figure 7 As shown, when the second main body 2 is in the retracted position, the first mounting part 211 of the second main body 2 will slide to the uppermost end of the first main body 1. To ensure that the first sliding bearing 31 does not slip, the first sliding bearing 31 needs to be placed at the upper end of the overlapping area of ​​the first main body 1 and the second main body 2 when the second main body 2 is in the retracted position. Figure 8 As shown, with the second main body 2 in the extended position, the second mounting portion 212 of the second main body 2 slides to the lowest end of the first main body 1. To ensure that the second sliding bearing 32 does not slip, the second sliding bearing 32 needs to be placed at the lower end of the overlapping area of ​​the first main body 1 and the second main body 2 when the second main body 2 is in the extended position. By setting the positions of the first sliding bearing 31 and the second sliding bearing 32, it is ensured that the second main body 2 can reliably move between the two sliding bearings.

[0051] In one embodiment, such as Figure 2 As shown, the first through hole 2111 includes a first hole segment 2111a and a second hole segment 2111b. The second hole segment 2111b connects the first hole segment 2111a and the second through hole 2121. The radial dimension of the first hole segment 2111a along the first body 1 is smaller than the radial dimension of the second hole segment 2111b along the first body 1. The first sliding bearing 31 is embedded in the second hole segment 2111b to stably install the first sliding bearing 31 and prevent the first sliding bearing 31 from falling off from the first hole segment 2111a.

[0052] In one embodiment, such as Figure 1 As shown, the second magnet 23 is located on the side of the second sliding bearing 32 facing away from the end cap 22. Specifically, the second magnet 23 is located between the first sliding bearing 31 and the second sliding bearing 32 in the axial direction of the first body 1, so that the second magnet 23 can be limited along the axial direction of the first body 1 by the two sliding bearings to fix the second magnet 23.

[0053] In one embodiment, such as Figure 1As shown, the guide mechanism 3 further comprises a bearing limiting block 33, which is installed between the second mounting portion 212 and the outer ring of the second sliding bearing 32. At this time, the second magnet 23 is located between the first mounting portion 211 and the bearing limiting block 33.

[0054] The second sliding bearing 32 and the bearing limiting block 33 can be rigid members, and the two structures are assembled in advance by pre-pressing. After the first main body 1 is assembled, the pre-pressing structure is installed. In this way, the installation space of the first main body 1 is larger when it is installed, and the installation is facilitated.

[0055] In an embodiment, as shown in Figure 1 As shown, the end cover 22 is provided with an extension groove 221 recessed in a direction away from the shell 21, and the inner cavity of the shell 21 communicates with the extension groove 221 to form the accommodation space. When the second main body 2 moves relative to the first main body 1, part of the first main body 1 can be inserted into the extension groove 221 when the second main body 2 is retracted, and the end cover 22 limits the retraction of the second main body 2.

[0056] In an embodiment, as shown in Figures 1 to 8 As shown, the first magnet 11 is a coil, and the second magnet 23 is a magnetic steel, i.e., a permanent magnet. At this time, the first main body 1 further comprises an iron core 12, and the coil is wound on the iron core 12.

[0057] The coil wound on the iron core 12 together constitutes the first main body 1, which functions to pass three-phase alternating current to generate a changing magnetic field. The magnetic steel is pasted on the inner ring of the shell 21 to jointly constitute part of the second main body 2, and the magnetic steel generates a stable magnetic field. The changing magnetic field and the stable magnetic field interact in the air gap space to generate a force, so that the first main body 1 and the second main body 2 produce relative motion. During the relative motion, the first main body 1 and the second main body 2 need to ensure a certain gap (i.e., air gap), otherwise friction will occur between the first main body 1 and the second main body 2 during the motion, which will cause the linear motor to fail to work.

[0058] Taking the first magnet 11 as a coil and the second magnet 23 as a magnetic steel as an example, the assembly process of the linear motor provided in the embodiments of the present application is as follows:

[0059] (1) As shown in Figure 2 The first sliding bearing 31 is pressed into the shell 21, and the first sliding bearing 31 is reliably positioned by the second hole section 2111b on the shell 21.

[0060] (2) As shown in Figure 3As shown, the magnetic steel is pasted on the inner circle of the shell 21 in a circle by circle manner, and the second mounting portion 212 is away from the one end of the first mounting portion 211, and a space for installing the second sliding bearing 32 is reserved.

[0061] (3) as shown in Figure 4 As shown, the first body 1 composed of the iron core 12 and the coil is installed into the structure of step (2), and the relative position between the first body 1 and the structure of step (2) is fixed to ensure the smooth installation of the second sliding bearing 32.

[0062] (4) as shown in Figure 5 As shown, due to the installation requirement of the magnetic steel, there is a large gap between the shell 21 and the first body 1, so the second sliding bearing 32 needs to be pre-pressed on the bearing limiting block 33 and finally embedded into the structure of step (2), and the shell 21 can be provided with a structure capable of reliably positioning the structure composed of the bearing limiting block 33 and the second sliding bearing 32, such as a positioning groove.

[0063] (5) as shown in Figure 6 As shown, the end cover 22 is sleeved on the first body 1, and the shell 21 and the end cover 22 are reliably connected along the periphery through bolts.

[0064] The suspension provided by the embodiment of the utility model comprises the linear motor.

[0065] The vehicle provided by the embodiment of the utility model comprises the linear motor or the suspension.

[0066] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A linear motor, characterized by, The linear motor comprises a first body and a second body, the second body being movable relative to the first body in an axial direction of the first body; The first body comprises a first magnet, and the second body comprises a shell, an end cover and a second magnet, the shell being sleeved on the first body, the second magnet being arranged in the shell, and the end cover being detachably connected to the shell to form an accommodation space of the first body between the shell and the end cover; One of the first magnet and the second magnet is a coil, and the other is a permanent magnet or an electromagnet.

2. The linear motor of claim 1, wherein The linear motor further comprises a guide mechanism arranged between the first body and the second body; The guide mechanism comprises a second sliding bearing arranged at a connection between the shell and the end cover.

3. The linear motor of claim 2, wherein, The guide mechanism further comprises a first sliding bearing arranged at an end of the shell away from the end cover.

4. The linear motor of claim 3, wherein The shell comprises a first mounting portion and a second mounting portion connected to the first mounting portion, a first through hole is formed in the first mounting portion, a second through hole in communication with the first through hole is formed in the second mounting portion, a size of the first through hole in a radial direction of the first body is smaller than a size of the second through hole in the radial direction of the first body, the second magnet is arranged on the second mounting portion and located in the second through hole, and the end cover is mounted on a side of the second mounting portion away from the first mounting portion.

5. The linear motor of claim 4, wherein, The first sliding bearing is arranged on the first mounting portion, and the second sliding bearing is arranged on the second mounting portion.

6. The linear motor of claim 5, wherein, The first sliding bearing is located in the first through hole, and the second sliding bearing is located in the second through hole.

7. The linear motor of claim 6, wherein The first through hole comprises a first hole section and a second hole section, the second hole section being in communication between the first hole section and the second through hole, a size of the first hole section in the radial direction of the first body is smaller than a size of the second hole section in the radial direction of the first body, and the first sliding bearing is located in the second hole section.

8. The linear motor of claim 5, wherein, The second magnet is located on a side of the second sliding bearing away from the end cover.

9. The linear motor of claim 5, wherein, The second magnet is located between the first sliding bearing and the second sliding bearing in the axial direction of the first body.

10. The linear motor of claim 5, wherein, The guide mechanism further comprises a bearing limiting block mounted between the second mounting portion and an outer ring of the second sliding bearing.

11. The linear motor of claim 10, wherein, The second magnet is located between the first mounting portion and the bearing limiting block.

12. The linear motor of claim 4, wherein, Cross sections of the first through hole and the second through hole in the radial direction of the first body are circular.

13. The linear motor of claim 12, wherein, A hole diameter of the first through hole is smaller than a hole diameter of the second through hole.

14. The linear motor of claim 1, wherein, The end cover is provided with an extension groove recessed away from the shell, and an inner cavity of the shell is in communication with the extension groove to form the accommodation space.

15. A suspension characterized in that, The linear motor comprises any one of the linear motors of claims 1-14.

16. A vehicle characterized by comprising: The linear motor comprises any one of the linear motors of claims 1-14, or the suspension of claim 15.

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