Mandrel assembly, linear motor, suspension system and vehicle

Abstract

The invention relates to a mandrel assembly, a linear motor, a suspension system and a vehicle, the mandrel assembly is provided with a cooling channel, the cooling channel comprises a liquid inlet channel, a liquid outlet channel and a plurality of cooling branches, each cooling branch is communicated with the liquid inlet channel and the liquid outlet channel, and each cooling branch with high heat exchange intensity is communicated with the liquid inlet channel and the liquid outlet channel with low water resistance. Therefore, the cooling channel has both low water resistance and high heat exchange intensity.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a spindle assembly, a linear motor, a suspension system, and a vehicle. Background Art

[0002] In the related art, due to the limited space for setting up the cooling channel in the core shaft assembly, it is usually difficult for the cooling channel to have both low water resistance and high heat exchange intensity.

[0003] Combined with the characteristics of related technologies, it is deduced that the existing technology has a technical problem that the cooling channel in the core shaft assembly is difficult to achieve both low water resistance and high heat exchange intensity. Summary of the Invention

[0004] An embodiment of the present application provides a core shaft assembly, a linear motor, a suspension system, and a vehicle, wherein the cooling channel of the core shaft assembly includes a liquid inlet channel and a liquid outlet channel with low water resistance and multiple cooling branches with high heat exchange intensity, so as to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a core shaft assembly is provided, which is provided with a cooling channel, wherein the cooling channel includes a liquid inlet channel, a liquid outlet channel and multiple cooling branches, and each cooling branch is connected to the liquid inlet channel and the liquid outlet channel.

[0006] Optionally, the core shaft assembly includes a first section and a second section arranged along the axial direction of the core shaft assembly; wherein the liquid inlet channel and the liquid outlet channel are arranged in the first section, and the plurality of cooling branches are arranged in the second section.

[0007] Optionally, the core shaft assembly includes a core shaft body and a channel divider; wherein the core shaft body is provided with a mounting cavity, and the channel divider is installed in the mounting cavity to divide the mounting cavity into a liquid outlet channel and a liquid inlet channel that are independent of each other.

[0008] Optionally, the channel partition includes a partition cylinder, the liquid outlet channel is provided between the core shaft body and the partition cylinder, and the liquid inlet channel is provided inside the partition cylinder.

[0009] Optionally, the core shaft body is provided with a guide rail hole suitable for the guide rod to pass through in the second section, and the cooling branches are provided on the outer side surface of the core shaft body and are arranged at intervals in the circumferential direction to surround the guide rail hole.

[0010] Optionally, each of the cooling branches includes a first branch, a second branch and a third branch, the first branch and the second branch extend axially along the core shaft assembly and are spaced apart in the circumferential direction of the core shaft assembly, and the third branch connects one end of the first branch and one end of the second branch; wherein the other end of the first branch connects to the liquid inlet channel, and the other end of the second branch connects to the liquid outlet channel.

[0011] Optionally, the core shaft body is provided with a shaft liquid inlet hole and a shaft liquid outlet hole, the shaft liquid inlet hole is connected to the liquid inlet channel and the first branch, and the shaft liquid outlet hole is connected to the liquid outlet channel and the second branch.

[0012] Optionally, the height of the shaft body liquid outlet hole is higher than the height of the shaft body liquid inlet hole.

[0013] Optionally, in the axial direction from the first section toward the second section, the angle between the extension direction of the liquid outlet hole of the shaft and the axial direction on the side close to the second section is an acute angle; and / or the angle between the extension direction of the liquid inlet hole of the shaft and the axial direction on the side close to the second section is an acute angle.

[0014] Optionally, the angle between the extension direction of the shaft liquid outlet hole and the axial direction is in a range of 5 degrees to 85 degrees, and the angle between the extension direction of the shaft liquid inlet hole and the axial direction is in a range of 5 degrees to 85 degrees.

[0015] Optionally, an outer wall of the bottom of the separation cylinder is provided with an annular groove, and a plurality of circular holes are opened on the groove wall of the annular groove; wherein, one end of each of the circular holes is connected to the liquid inlet channel, and the other end of each of the circular holes is connected to the corresponding liquid inlet hole of the shaft body.

[0016] Optionally, the core shaft assembly further comprises an end cover located at the top of the core shaft body, the end cover being provided with an end cover liquid inlet and an end cover liquid outlet, the end cover liquid inlet being connected to the liquid inlet channel, and the end cover liquid outlet being connected to the liquid outlet channel.

[0017] Optionally, at least one first sealing groove is provided at one end of the separation cylinder away from the cooling branch, a first sealing ring is provided in the first sealing groove, and the first sealing ring abuts against the end cover to seal the liquid inlet channel.

[0018] Optionally, a groove is provided inside the core shaft body, and the bottom of the separation cylinder is clamped in the groove.

[0019] Optionally, a sealing protrusion is provided on the outer side wall of the bottom of the separation cylinder, and a sealing groove is provided inside the core shaft body, and the sealing protrusion is engaged with the sealing groove.

[0020] Optionally, the channel separator includes a separation plate extending along the axial direction, and the liquid outlet channel and the liquid inlet channel are located on opposite sides of the separation plate.

[0021] Optionally, the core shaft body is provided with two cooling branches, each cooling branch includes multiple first branches, multiple second branches and a third branch, the multiple first branches and the multiple second branches extend along the axial direction, the third branch extends circumferentially and is connected to one end of the multiple first branches and one end of the multiple second branches, the other end of the first branch is connected to the liquid inlet channel, and the other end of the second branch is connected to the liquid outlet channel; wherein, the multiple first branches of the two cooling branches are arranged opposite to the multiple second branches of the two cooling branches.

[0022] Optionally, the core shaft body is provided with a shaft liquid inlet hole and a shaft liquid outlet hole, the shaft liquid inlet hole is connected to the liquid inlet channel and the first branch, and the shaft liquid outlet hole is connected to the liquid outlet channel and the second branch.

[0023] Optionally, the inner wall of the core shaft body of the second section is provided with a plurality of heat-conducting teeth extending along the axial direction, the cooling branch includes a first branch, a second branch, and a third branch, and the first branch and the second branch extending along the axis are formed between adjacent heat-conducting teeth, the first branch is connected to the liquid inlet channel, the second branch is connected to the liquid outlet channel, and the third branch is formed at the bottom end of the heat-conducting tooth, and the third branch extends circumferentially and is connected to one end of multiple first branches and one end of multiple second branches.

[0024] Optionally, the core shaft assembly also includes a sleeve, which is arranged on the inner side of the core shaft body. The sleeve and the core shaft body define the cooling branch. A sleeve disk is also provided at the bottom end of the sleeve. The sleeve disk is provided with at least one bolt hole. The sleeve disk and the core shaft body are connected by a connecting piece passing through the bolt hole.

[0025] Optionally, at least one second sealing groove is provided on a side of the sleeve disk close to the cooling branch, a second sealing ring is provided in the second sealing groove, and the second sealing ring abuts against the core shaft body or the stator core to seal the cooling branch.

[0026] According to a second aspect of the present application, a linear motor is provided, comprising a spindle assembly as described in any one of the above embodiments.

[0027] According to a third aspect of the present application, a suspension system is further provided, comprising the linear motor described in the above embodiment.

[0028] According to a fourth aspect of the present application, a vehicle is further provided, comprising the suspension system as described in the above embodiment.

[0029] In the core shaft assembly of the embodiment of the present application, each cooling branch with high heat exchange strength is connected to the liquid inlet channel and liquid outlet channel with low water resistance to form a cooling channel within the core shaft assembly, so that the cooling channel takes into account both low water resistance and high heat exchange strength.

[0030] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0032] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0033] Figure 1 is a perspective schematic diagram of a mandrel assembly provided in an exemplary embodiment of the present disclosure;

[0034] Figure 2 is a first side schematic diagram of a spindle assembly provided in an exemplary embodiment of the present disclosure;

[0035] Figure 3 is a first cross-sectional schematic diagram of a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0036] Figure 4 1 is a schematic diagram of a first structure of a cooling channel in a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0037] Figure 5 is a schematic structural diagram of a separation cylinder in a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0038] Figure 6 is a schematic cross-sectional view of a separation cylinder in a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0039] Figure 7 is a second side schematic view of a mandrel assembly provided in an exemplary embodiment of the present disclosure;

[0040] Figure 8 is a second cross-sectional schematic diagram of a mandrel assembly provided in an exemplary embodiment of the present disclosure;

[0041] Figure 9 is a schematic diagram of a second structure of a cooling channel in a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0042] Figure 10 is a third cross-sectional schematic diagram of a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0043] Figure 11 1 is a third structural schematic diagram of a cooling channel in a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0044] Figure 12 is a fourth cross-sectional schematic diagram of a core shaft assembly provided in an exemplary embodiment of the present disclosure;

[0045] Figure 13 Schematic diagram of the structure of the sleeve disk in the core shaft assembly provided in an exemplary embodiment of the present disclosure.

[0046] Description of reference numerals:

[0047] 1. Mandrel body; 101. Shaft body liquid inlet hole; 102. Shaft body liquid outlet hole;

[0048] 2. Channel separator; 21. Separation cylinder; 22. Separation plate; 3. Liquid inlet channel; 4. Liquid outlet channel;

[0049] 5. Cooling branch; 51. First branch; 52. Second branch; 53. Third branch;

[0050] 6. End cover; 61. End cover liquid inlet; 62. End cover liquid outlet;

[0051] 7. Sleeve; 8. Guide rail hole; 9. Core disk; 10. Winding; 11. First sealing ring; 12. Mounting cavity; 13. Annular groove; 14. Circular hole; 15. Fixing piece; 16. Sealing protrusion; 17. Second sealing ring; 18 Thermal tooth; 19. Sleeve disk; 20. Bolt hole. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0053] According to the first aspect of this application, see Figures 1 to 12The core shaft assembly provided in the present disclosure is provided with a cooling channel, which includes a liquid inlet channel 3, a liquid outlet channel 4 and a plurality of cooling branches 5, each cooling branch 5 connecting the liquid inlet channel 3 and the liquid outlet channel 4.

[0054] Among them, the cooling branch 5 has a higher heat exchange intensity than the liquid inlet channel 3 and the liquid outlet channel 4; the liquid inlet channel 3 and the liquid outlet channel 4 have a lower water resistance than the cooling branch 5.

[0055] In this embodiment, each cooling branch 5 with high heat exchange intensity is connected to the liquid inlet channel 3 and the liquid outlet channel 4 with low water resistance, so that the cooling channel has the characteristics of low water resistance and high heat exchange intensity.

[0056] In one embodiment, see Figure 2 、 Figure 3 The core shaft assembly includes a first section and a second section arranged along the axial direction of the core shaft assembly; wherein, the liquid inlet channel 3 and the liquid outlet channel 4 are arranged in the first section, and a plurality of cooling branches 5 are arranged in the second section.

[0057] The cross-sectional areas of the liquid inlet channel 3 and the liquid outlet channel 4 are larger than the cross-sectional area of the cooling branch 5 .

[0058] The core shaft body 1 is provided with a guide rail hole 8 in the second section, which is suitable for the guide rod to pass through.

[0059] It can be understood that since a guide rail hole 8 is formed in the second section of the core shaft body 1, the setting of the guide rail hole 8 results in a small space in the second section for setting the cooling channel. By setting a cooling branch 5 with a small space occupation and high heat exchange intensity in the second section, the heat exchange efficiency of the second section can be improved when the space in the second section is limited.

[0060] In this embodiment, by providing a cooling branch 5 with higher heat exchange intensity and smaller occupied space in the second section, the heat exchange efficiency of the second section is improved when the space in the second section is limited.

[0061] In one embodiment, see Figure 3 The core shaft assembly includes a core shaft body 1 and a channel separator 2; wherein, a mounting cavity 12 is provided at the top of the core shaft body 1, and the channel separator 2 is installed in the mounting cavity 12 to separate the mounting cavity 12 into a liquid outlet channel 4 and a liquid inlet channel 3 that are independent of each other.

[0062] Among them, see Figure 3 、 Figure 8 The channel separator 2 may be a separation tube 21 or a separation plate 22 , and is used to separate the liquid outlet channel 4 from the liquid inlet channel 3 .

[0063] The channel separator 2 is arranged at the first section of the core shaft assembly.

[0064] The diameter of the core shaft body 1 ranges from 30 mm to 420 mm, and the diameter of the mounting cavity 12 ranges from 24 mm to 400 mm.

[0065] The diameter of the core shaft body 1 can be any one of 30 mm, 100 mm, 200 mm, 300 mm, and 420 mm, and the diameter of the mounting cavity 12 can be any one of 24 mm, 100 mm, 200 mm, 300 mm, and 400 mm.

[0066] In one embodiment, see Figure 3 The channel separator 2 is a separation cylinder 21 , the liquid outlet channel 4 is provided between the core shaft body 1 and the separation cylinder 21 , and the liquid inlet channel 3 is provided inside the separation cylinder 21 .

[0067] The partition cylinder 21 may be cylindrical or rectangular.

[0068] The top and bottom ends of the separation cylinder 21 abut against the end cover 6 and the core shaft body 1 respectively to seal the liquid inlet channel 3 and prevent the liquid inlet channel 3 from communicating with the liquid outlet channel 4 .

[0069] In one embodiment, the core shaft body 1 is provided with one or more cooling branches 5 .

[0070] A cooling branch 5 is formed by digging a groove on the inner side wall of the core shaft body 1 .

[0071] In one embodiment, see Figure 3 The core shaft body 1 is provided with a guide rail hole 8 suitable for the guide rod to pass through in the second section, and a plurality of cooling branches 5 are arranged at intervals in the circumferential direction and surround the guide rail hole 8.

[0072] The cooling branch 5 is formed on the side wall of the core shaft body 1 in the second section.

[0073] Among them, a sleeve 7 is also provided on the outside of the cooling branch 5. The sleeve 7 is arranged circumferentially around the cooling branch 5. The top end of the sleeve 7 is connected to the bottom end of the core shaft body 1 of the first section, and the side wall of the sleeve 7 is arranged flush with the side wall of the core shaft body 1 of the first section.

[0074] It can be understood that the guide rod is inserted into the guide rail hole 8 to achieve connection with the inside, and the cooling branch 5 is arranged around the guide rail hole 8 to fully utilize the circumferential space of the guide rail hole 8 to set the cooling branch 5.

[0075] It should be noted that a gap is formed in the axial direction between the top end of the cooling branch 5 and the bottom end of the core shaft body 1 of the first section. When the top end of the sleeve 7 is welded to the core shaft body 1, the gap is used to prevent the welding from affecting the top end of the cooling branch 5. The gap needs to be at least greater than 2 mm.

[0076] It is worth noting that the outer wall of the sleeve 7 is flush with the side wall of the upper core shaft body 1, so that the overall outline of the sleeve 7 and the first section of the core shaft body 1 is cylindrical, which is convenient for subsequent assembly with other components.

[0077] In this embodiment, the cooling branch 5 is arranged around the guide rail hole 8, and the sleeve 7 is arranged around the cooling branch 5. The side wall of the sleeve 7 is flush with the edge of the side wall of the core shaft body 1 of the first section, which is convenient for assembly. At the same time, the sleeve 7 can also be used to protect the cooling branch 5 located on its inner side.

[0078] In one embodiment, see Figure 4 Each cooling branch 5 includes a first branch 51, a second branch 52 and a third branch 53. The first branch 51 and the second branch 52 extend axially and are spaced apart in the circumferential direction of the core shaft assembly. The third branch 53 is connected between one end of the first branch 51 and one end of the second branch 52; wherein the other end of the first branch 51 is connected to the liquid inlet channel 3, and the other end of the second branch 52 is connected to the liquid outlet channel 4.

[0079] A first branch 51 , a second branch 52 , and a third branch 53 are interconnected to form a U-shaped structure.

[0080] The number of the first branches 51 and the number of the second branches 52 are the same, and the sum of the number of the first branches 51 and the number of the second branches 52 is any even number from 4 to 72.

[0081] The thickness of the first branch 51 and the second branch 52 along the radial direction of the core shaft body 1 ranges from 0.5 mm to 10 mm.

[0082] It can be understood that the radial thickness of the first branch 51 and the second branch 52 along the core shaft body 1 can be independently selected from any one of 0.5 mm, 3 mm, 5 mm, 8 mm, and 10 mm. When the thickness is less than 0.5 mm, the water resistance of the cooling branch 5 is too large; when the thickness is greater than 10 mm, the space occupied by the cooling branch 5 is too large, which is not conducive to the setting of the cooling branch 5.

[0083] In this embodiment, the cooling branch 5 includes a first branch 51, a second branch 52, and a third branch 53 that are interconnected. Multiple cooling branches 5 are arranged at intervals along the circumferential direction around the guide rail hole 8, further improving the heat exchange efficiency of the cooling channel in the second section.

[0084] In one embodiment, see Figure 3 The core shaft body 1 is provided with a shaft liquid inlet hole 101 and a shaft liquid outlet hole 102. The shaft liquid inlet hole 101 is connected between the liquid inlet channel 3 and the other end of the first branch 51, and the shaft liquid outlet hole 102 is connected between the liquid outlet channel 4 and the other end of the second branch 52.

[0085] It can be understood that the core shaft body 1 includes a shaft body liquid inlet hole 101 and a shaft body liquid outlet hole 102, which are used to achieve communication between the liquid inlet channel 3 and the liquid outlet channel 4 and the cooling branch 5 respectively.

[0086] In one embodiment, see Figure 3 、 Figure 4 , the height of the shaft body liquid outlet hole 102 is higher than the height of the shaft body liquid inlet hole 101.

[0087] The angle between the shaft body liquid outlet hole 102 and the axial direction may be 90 degrees; and / or the angle between the shaft body liquid inlet hole 101 and the axial direction may be 90 degrees.

[0088] It can be understood that since the bottom end of the separation cylinder 21 is inserted into the groove of the core shaft body 1, the shaft liquid inlet hole 101 can only be located on the core shaft body 1 in the groove, and the shaft liquid outlet hole 102 can only be located on the core shaft body 1 on the side of the groove away from the cooling branch 5. Therefore, the height of the shaft liquid outlet hole 102 is higher than the height of the shaft liquid inlet hole 101.

[0089] In one embodiment, see Figure 10 、 Figure 11 , the angle between the extension direction of the shaft body liquid outlet hole 102 and the axial direction is an acute angle; and / or; the angle between the extension direction of the shaft body liquid inlet hole 101 and the axial direction is an acute angle.

[0090] It is understandable that by tilting the shaft liquid inlet hole 101 and / or the shaft liquid outlet hole 102 , the flow steering resistance of the cooling medium in the shaft liquid inlet hole 101 and / or the shaft liquid outlet hole 102 can be reduced.

[0091] In one embodiment, the angle between the extension direction of the shaft body liquid outlet hole 102 and the axial direction is in the range of 5 degrees to 85 degrees, and the angle between the extension direction of the shaft body liquid inlet hole 101 and the axial direction is in the range of 5 degrees to 85 degrees.

[0092] The angle between the shaft body liquid inlet hole 101 and the shaft body liquid outlet hole 102 may be any one of 5 degrees, 20 degrees, 40 degrees, 60 degrees, and 85 degrees.

[0093] In one embodiment, see Figure 5 、 Figure 6 The outer wall of the bottom of the separation cylinder 21 is provided with an annular groove 13, and the groove wall of the annular groove 13 is provided with multiple circular holes 14; wherein, one end of each circular hole 14 is connected to the liquid inlet channel 3, and the other end of each circular hole 14 is connected to the corresponding shaft body liquid inlet hole 101.

[0094] The circular hole 14 has the same diameter as the shaft body liquid outlet hole 102 , and the diameter ranges from 1.2 mm to 10 mm.

[0095] The diameters of the circular hole 14 and the shaft body liquid outlet hole 102 can be independently selected from any one of 1.2 mm, 3 mm, 5 mm, 8 mm, and 10 mm.

[0096] It is understandable that the design of the circular hole 14 and the annular groove 13 enables the cooling medium in the liquid inlet channel 3 to flow more evenly through the circular hole 14 into the corresponding shaft liquid inlet hole 101 and then into the cooling branch 5 .

[0097] In one embodiment, see Figure 1 、 Figure 2 、 Figure 3 The core shaft assembly also includes an end cover 6 located at the top of the core shaft body 1, and the end cover 6 is provided with an end cover liquid inlet 61 and an end cover 6 liquid outlet 62, the end cover liquid inlet 61 is connected to the liquid inlet channel 3, and the end cover 6 liquid outlet 62 is connected to the liquid outlet channel 4; wherein, at least one circle of first sealing grooves is circumferentially provided at one end of the separation cylinder 21 away from the cooling branch 5, and a first sealing ring 11 is provided in the first sealing groove, and the first sealing ring 11 abuts the end cover 6 to seal the liquid inlet channel 3.

[0098] The apertures of the liquid inlet 61 of the end cover and the liquid outlet 62 of the end cover 6 may be the same.

[0099] The first sealing ring 11 may be disposed partially beyond the first sealing groove.

[0100] The first sealing ring 11 may be made of an elastic material.

[0101] It can be understood that the portion of the first sealing ring 11 that extends beyond the first sealing groove abuts against the end cover 6 and is compressed, thereby improving the sealing effect. The first sealing ring 11 and the first sealing groove can be interference fitted, which increases the bonding force between the first sealing ring 11 and the first sealing groove and prevents the first sealing ring 11 from falling off from the first sealing groove.

[0102] Furthermore, the contact area between the first sealing ring 11 and the first sealing groove may be increased by increasing the axial depth of the first sealing groove, thereby enhancing the bonding force between the two.

[0103] In this embodiment, the first sealing ring 11 is used to seal the top end of the liquid inlet channel 3 to isolate the liquid inlet channel 3 from the liquid outlet channel 4 .

[0104] In one embodiment, see Figure 3 The bottom surface of the core shaft body 1 in the installation cavity 12 is provided with a groove, and the bottom of the separation cylinder 21 is stuck in the groove.

[0105] It can be understood that the bottom of the separation cylinder 21 is inserted into the groove of the core shaft body 1 to seal the bottom end of the liquid inlet channel 3 .

[0106] In one embodiment, see Figure 5 、 Figure 6 A sealing protrusion 16 is provided on the outer side wall of the bottom of the separation cylinder 21, and a sealing groove is provided on the inner side surface of the installation cavity 12, and the sealing protrusion 16 is engaged with the sealing groove.

[0107] The sealing groove is provided on the core shaft body 1 .

[0108] It can be understood that the sealing protrusion 16 and the sealing groove are engaged with each other. On the one hand, it can enhance the bonding force between the separation cylinder 21 and the core shaft body 1, and prevent the separation cylinder 21 and the core shaft body 1 from shaking and causing the cooling medium in the liquid inlet channel 3 to leak out. On the other hand, it can also enhance the sealing effect between the separation cylinder 21 and the core shaft body 1, and better separate the liquid inlet channel 3 and the liquid outlet channel 4.

[0109] In one embodiment, see Figure 5 、 Figure 6 , the sealing protrusion 16 is stepped.

[0110] In one embodiment, see Figure 3 The core shaft assembly further includes a plurality of fixing members 15 arranged circumferentially and spaced apart from each other. The fixing members 15 are connected between the separation cylinder 21 and the core shaft body 1 .

[0111] There are 2 to 8 circles of fixing members 15 arranged around the waterway tube, and any circle contains 2 to 8 fixing members 15 .

[0112] The spacing between adjacent fixing members 15 may be equal.

[0113] The fixing member 15 is used to securely connect the separation cylinder 21 to the core shaft body 1 , thereby preventing the separation cylinder 21 from shaking relative to the core shaft body 1 and preventing the liquid inlet channel 3 from leaking along the top of the separation cylinder 21 .

[0114] In one embodiment, see Figure 1 、 Figure 7 、 Figure 8 The channel separator 2 is a partition plate 22 extending in the axial direction, and the liquid outlet channel 4 and the liquid inlet channel 3 are located on opposite sides of the partition plate 22 .

[0115] The partition plate 22 may coincide with the central axis of the core shaft assembly, and the liquid outlet channel 4 and the liquid inlet channel 3 are symmetrically arranged with respect to the partition plate 22 .

[0116] It can be understood that the liquid outlet channel 4 and the liquid inlet channel 3 are separated by the partition plate 22 and are independent of each other.

[0117] In one embodiment, see Figure 9 、 Figure 11The core shaft body 1 is provided with two cooling branches 5, each cooling branch 5 includes multiple first branches 51, multiple second branches 52 and a third branch 53, the multiple first branches 51 and the multiple second branches 52 extend axially, the third branch 53 extends circumferentially and is connected to one end of the multiple first branches 51 and one end of the multiple second branches 52, the other end of the first branch 51 is connected to the liquid inlet channel 3, and the other end of the second branch 52 is connected to the liquid outlet channel 4; wherein, the multiple first branches 51 of the two cooling branches 5 and the multiple second branches 52 of the two cooling branches 5 are arranged opposite to each other.

[0118] The number of the first branches 51 and the number of the second branches 52 are the same and both are even.

[0119] Among them, multiple first branches 51 are evenly divided into the first group and the second group according to the distribution area, and multiple second branches 52 are evenly divided into the third group and the fourth group according to the area, wherein the first group is adjacent to the third group and is interconnected through a third branch 53, and the second group is adjacent to the fourth group and is interconnected through another third branch 53.

[0120] The height of the third branch 53 along the axial direction ranges from 4 mm to 36 mm.

[0121] The axial height of the third branch 53 may be any one of 4 mm, 8 mm, 16 mm, 24 mm, and 36 mm.

[0122] It can be understood that two third branches 53 can be provided. Since the multiple first branches 51 and the multiple second branches 52 are arranged relative to each other along the first direction, the multiple first branches 51 can be divided into the first group and the second group along the second direction perpendicular to the first direction, and the multiple second branches 52 can be divided into the third group and the fourth group. The first group and the third group are interconnected through a third branch 53, and the second group and the fourth group are interconnected through another third branch 53, so as to realize the connection between the first branch 51 and the second branch 52 in the cooling branch 5.

[0123] Please note that, see Figure 9 Alternatively, only one third branch 53 may be provided, through which all the first branches 51 and the second branches 52 are connected.

[0124] In this example, see Figure 9 、 Figure 11 By setting only one or two third branches 53, the connection between multiple first branches 51 and multiple second branches 52 in the cooling branch 5 can be achieved without setting more third branches 53. The preparation process is simple and the cost is lower.

[0125] In one embodiment, see Figure 9 , a cooling branch 5 is provided with a third branch 53 .

[0126] In one embodiment, the core shaft body 1 is provided with a shaft liquid inlet hole 101 and a shaft liquid outlet hole 102, the shaft liquid inlet hole 101 is connected between the liquid inlet channel 3 and the other end of the first branch 51, and the shaft liquid outlet hole 102 is connected between the liquid outlet channel and the other end of the second branch 52.

[0127] The shaft body liquid inlet hole 101 and the shaft body liquid outlet hole 102 may have the same height.

[0128] In one embodiment, see Figure 12 、 Figure 13 The inner wall of the core shaft body 1 of the second section is provided with a plurality of heat-conducting teeth 18 extending along the axial direction. The cooling branch 5 includes a first branch 51, a second branch 52, and a third branch 53. A first branch 51 and a second branch 52 extending along the axis are formed between adjacent heat-conducting teeth 18. The first branch 51 is connected to the liquid inlet channel 3, and the second branch 52 is connected to the liquid outlet channel 4. A third branch 53 is formed at the bottom end of the heat-conducting tooth 18. The third branch 53 extends circumferentially and is connected to one end of multiple first branches 51 and one end of multiple second branches 52.

[0129] It can be understood that a gap is formed between each heat conducting tooth 18 and the sleeve disk 19 located at the bottom end of the heat conducting tooth 18 , and a third branch 53 is formed through the gap. The third branch 53 extends circumferentially to connect the first branch 51 and the second branch 52 .

[0130] In one embodiment, see Figure 12 、 Figure 13 The core shaft assembly also includes a sleeve 7, which is arranged on the inner side of the cooling branch 5 and the cooling branch 5 is arranged around the sleeve 7. A sleeve disk 19 is also provided at the bottom end of the sleeve 7. The edge of the sleeve disk 19 is provided with at least one bolt hole 20 along the circumferential direction. The sleeve disk 19 is connected to the core shaft body 1 by bolts passing through the bolt holes 20.

[0131] The bottom end of the sleeve 7 is connected to the sleeve plate 19 by bolts passing through the bolt holes 20, so as to seal the cooling medium in the cooling support system.

[0132] The number of the bolt holes 20 ranges from 2 to 12. Specifically, the number of the bolt holes 20 can be 2, 4, 6, 8, 10, or 12.

[0133] In one embodiment, see Figure 12 At least one circle of second sealing groove is circumferentially provided at one end of the sleeve disk 19 close to the cooling branch 5 , and a second sealing ring 17 is provided in the second sealing groove. The second sealing ring 17 abuts against the core shaft body 1 to seal the cooling branch 5 .

[0134] In one embodiment, the cooling medium is cooling oil or cooling water.

[0135] In one embodiment, the end cover 6 may be made of aluminum alloy.

[0136] In one embodiment, see Figure 1 、 Figure 2 、 Figure 7 The core shaft assembly also includes an iron core disk 9 and a winding 10.

[0137] The core disk 9 can be arranged around the core shaft body 1 .

[0138] The core disk 9 can also be integrally formed with the core shaft body 1 , and the core disk 9 is located outside the core shaft body 1 .

[0139] The winding 10 is sleeved on the outer side of the peripheral wall of the core disk 9 .

[0140] In one embodiment, the materials for making the core shaft body 1, the sleeve 7, and the core disk 9 can be independently selected from any one of magnetic steel, silicon steel sheet, and other magnetic materials.

[0141] In one embodiment, the water channel tube is made of plastic.

[0142] According to a second aspect of the present application, a linear motor is provided, comprising a spindle assembly according to any one of the above embodiments.

[0143] According to a third aspect of the present application, a suspension system is further provided, comprising the linear motor of the above embodiment.

[0144] According to a fourth aspect of the present application, a vehicle is further provided, comprising the suspension system according to the above embodiment.

[0145] According to a second aspect of the present disclosure, a linear motor is provided, which includes a core shaft assembly as in any of the above embodiments and a winding 10 assembly sleeved on the outside of the peripheral wall of the core shaft assembly; the linear motor has all the beneficial effects of the above core shaft assembly, which will not be repeated in this disclosure.

[0146] According to a third aspect of the present disclosure, a suspension system is provided, wherein the linear motor includes a core shaft assembly as in any of the above embodiments or a linear motor as in the above embodiments; the suspension system has all the beneficial effects of the above core shaft assembly, which will not be described in detail in the present disclosure.

[0147] According to the third aspect of the present disclosure, a vehicle is provided, which includes a core shaft assembly as in any of the above embodiments, or a linear motor as in the above embodiments, or a suspension system as in the above embodiments. The vehicle has all the beneficial effects of the core shaft assembly, linear motor, or suspension system of any embodiment, which will not be repeated in this disclosure.

[0148] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this disclosure does not make any specific limitations on this.

[0149] The present application designs a cooling channel with a composite structure, adopts a liquid inlet channel 3 and a liquid outlet channel 4 with large apertures in the first section of the core shaft assembly, and adopts a cooling branch 5 for narrow gap heat exchange in the second section of the core shaft assembly. The cooling branch 5 has high heat exchange intensity, and the liquid inlet channel 3 and the liquid outlet channel 4 have large apertures and low water resistance, thereby achieving the characteristics of high heat exchange intensity and low water resistance in the cooling channel of the core shaft assembly.

[0150] In addition, the shaft body liquid inlet hole 101 and the shaft body liquid outlet hole 102 are used to connect the cooling branch 5 to the liquid inlet channel 3 and the liquid outlet channel 4 respectively. Only one end cover liquid inlet 61 and one end cover liquid outlet 62 need to be set to complete the flow circulation of the cooling medium in the entire cooling channel, eliminating the space and cost of setting up a water collector in related technologies.

[0151] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0152] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0153] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0154] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A spindle assembly, characterized in that: A cooling channel is provided, which includes a liquid inlet channel, a liquid outlet channel and a plurality of cooling branches, and each of the cooling branches is connected to the liquid inlet channel and the liquid outlet channel.

2. The spindle assembly according to claim 1, wherein: The core shaft assembly includes a first section and a second section arranged along the axial direction of the core shaft assembly; wherein the liquid inlet channel and the liquid outlet channel are arranged in the first section, and the plurality of cooling branches are arranged in the second section.

3. The spindle assembly according to claim 2, wherein: The core shaft assembly includes a core shaft body and a channel separator; wherein the core shaft body is provided with a mounting cavity, and the channel separator is installed in the mounting cavity to separate the mounting cavity into a liquid outlet channel and a liquid inlet channel that are independent of each other.

4. The spindle assembly according to claim 3, wherein: The channel partition comprises a partition cylinder, the liquid outlet channel is arranged between the core shaft body and the partition cylinder, and the liquid inlet channel is arranged in the partition cylinder.

5. The spindle assembly according to claim 1, wherein: The core shaft body is provided with a guide rail hole suitable for the guide rod to pass through in the second section, and the cooling branches are provided on the outer side surface of the core shaft body and are arranged at intervals in the circumferential direction to surround the guide rail hole.

6. The spindle assembly according to claim 5, characterized in that Each of the cooling branches includes a first branch, a second branch and a third branch, the first branch and the second branch extend along the axial direction of the core shaft assembly and are arranged at intervals in the circumferential direction of the core shaft assembly, and the third branch connects one end of the first branch and one end of the second branch; wherein, the other end of the first branch connects to the liquid inlet channel, and the other end of the second branch connects to the liquid outlet channel.

7. The spindle assembly according to claim 6, wherein: The core shaft body is provided with a shaft liquid inlet hole and a shaft liquid outlet hole. The shaft liquid inlet hole is connected to the liquid inlet channel and the first branch, and the shaft liquid outlet hole is connected to the liquid outlet channel and the second branch.

8. The spindle assembly according to claim 7, wherein: The height of the shaft body liquid outlet hole is higher than the height of the shaft body liquid inlet hole.

9. The spindle assembly according to claim 8, wherein: In the axial direction from the first section to the second section, the angle between the extension direction of the liquid outlet hole of the shaft and the axial direction on the side close to the second section is an acute angle; and / or the angle between the extension direction of the liquid inlet hole of the shaft and the axial direction on the side close to the second section is an acute angle.

10. The spindle assembly according to claim 9, wherein: The angle between the extension direction of the shaft body liquid outlet hole and the axial direction is in the range of 5 degrees to 85 degrees, and the angle between the extension direction of the shaft body liquid inlet hole and the axial direction is in the range of 5 degrees to 85 degrees.

11. The spindle assembly according to claim 7, wherein: An annular groove is provided on the outer side wall of the bottom of the separation cylinder, and a plurality of circular holes are opened on the groove wall of the annular groove; wherein, one end of each circular hole is connected to the liquid inlet channel, and the other end of each circular hole is connected to the corresponding liquid inlet hole of the shaft body.

12. The spindle assembly according to claim 1, wherein The core shaft assembly also includes an end cover located at the top of the core shaft body, the end cover is provided with an end cover liquid inlet and an end cover liquid outlet, the end cover liquid inlet is connected to the liquid inlet channel, and the end cover liquid outlet is connected to the liquid outlet channel.

13. The spindle assembly according to claim 12, wherein: At least one first sealing groove is provided at one end of the separation cylinder away from the cooling branch. A first sealing ring is provided in the first sealing groove. The first sealing ring abuts against the end cover to seal the liquid inlet channel.

14. The spindle assembly according to claim 13, wherein: A groove is provided inside the core shaft body, and the bottom of the separation cylinder is clamped in the groove.

15. The spindle assembly according to claim 14, wherein: A sealing protrusion is provided on the outer side wall of the bottom of the separation cylinder, and a sealing groove is provided inside the core shaft body, and the sealing protrusion is engaged with the sealing groove.

16. The spindle assembly according to claim 3, wherein: The channel partition comprises a partition plate extending along the axial direction, and the liquid outlet channel and the liquid inlet channel are located on opposite sides of the partition plate.

17. The spindle assembly according to claim 16, wherein: The core shaft body is provided with two cooling branches, each of the cooling branches includes multiple first branches, multiple second branches and a third branch, the multiple first branches and the multiple second branches extend along the axial direction, the third branch extends circumferentially and is connected to one end of the multiple first branches and one end of the multiple second branches, the other end of the first branch is connected to the liquid inlet channel, and the other end of the second branch is connected to the liquid outlet channel; wherein, the multiple first branches of the two cooling branches are arranged opposite to the multiple second branches of the two cooling branches.

18. The spindle assembly according to claim 17, wherein: The core shaft body is provided with a shaft liquid inlet hole and a shaft liquid outlet hole. The shaft liquid inlet hole is connected to the liquid inlet channel and the first branch, and the shaft liquid outlet hole is connected to the liquid outlet channel and the second branch.

19. The spindle assembly according to claim 3, wherein: The inner wall of the core shaft body of the second section is provided with a plurality of heat-conducting teeth extending along the axial direction, and the cooling branch includes a first branch, a second branch, and a third branch. The first branch and the second branch extending along the axis are formed between adjacent heat-conducting teeth, the first branch is connected to the liquid inlet channel, and the second branch is connected to the liquid outlet channel. The third branch is formed at the bottom end of the heat-conducting tooth, and the third branch extends along the circumferential direction and is connected to one end of multiple first branches and one end of multiple second branches.

20. The spindle assembly according to claim 3, wherein: The core shaft assembly also includes a sleeve, which is arranged on the inner side of the core shaft body. The sleeve and the core shaft body define the cooling branch. A sleeve disk is also provided at the bottom end of the sleeve. The sleeve disk is provided with at least one bolt hole. The sleeve disk and the core shaft body are connected by a connecting piece passing through the bolt hole.

21. The spindle assembly according to claim 20, wherein: At least one second sealing groove is provided on a side of the sleeve disk close to the cooling branch. A second sealing ring is provided in the second sealing groove. The second sealing ring abuts against the core shaft body or the stator core to seal the cooling branch.

22. A linear motor, characterized in that: Comprising a spindle assembly as claimed in any one of claims 1 to 21.

23. A suspension system, characterized in that: Comprising the linear motor as claimed in claim 22.

24. A vehicle, characterized in that: Comprising the suspension system of claim 23.

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