Linear motor, suspension system and vehicle
By designing a hollow cavity and chamfered guide rod in the linear motor, increasing air gap flow, and adding a limiting structure, the problem of guide rod scratching the bearing was solved, thereby achieving bearing stability and extended life, and reducing friction and production costs.
Patent Information
- Application Number
- CN202411197432.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-11-07
AI Technical Summary
The guide rod of the secondary component is prone to scratching and impacting the bearing when it moves relative to the bearing, which can lead to bearing damage.
A linear motor is designed in which the guide rod of the secondary component can move within a hollow cavity, the first bearing is fixed within the hollow cavity, the end of the guide rod is chamfered, and a channel is provided on the spindle to increase air gap flow. Limiting elements and limiting bosses are used to stabilize the bearing position.
It effectively avoids scratching and impacting the bearings by the guide rod, extends the bearing life, reduces friction, improves smooth movement and structural stability, and reduces production costs.
Smart Images
Figure CN120915084A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of linear motor, more particularly, to a linear motor, a suspension system and a vehicle. BACKGROUND
[0002] Generally, the linear motor includes a primary assembly, a secondary assembly and a bearing, the secondary assembly is arranged in the bearing, and the secondary assembly is movable relative to the primary assembly and the bearing. The bearing is arranged to reduce the friction between the primary assembly and the secondary assembly. However, when the guide rod of the secondary assembly moves relative to the bearing, the guide rod is easy to scratch and hit the bearing, which is easy to cause damage to the bearing. SUMMARY
[0003] The linear motor, the suspension system and the vehicle provided by the embodiments of the present application at least solve the problem that the guide rod is easy to scratch and hit the bearing, which is easy to cause damage to the bearing.
[0004] The linear motor provided by the embodiments of the present application includes a primary assembly, a first bearing and a secondary assembly. The primary assembly includes a core shaft, and the core shaft is provided with a hollow chamber. The first bearing is installed in the hollow chamber. The secondary assembly includes a guide rod, one end of the guide rod extends into the hollow chamber and passes through the first bearing. In the axial direction of the core shaft, the secondary assembly is movable relative to the primary assembly between a first limit position and a second limit position. Compared with when the secondary assembly is in the first limit position, when the secondary assembly is in the second limit position, the length of the guide rod extending into the hollow chamber is longer. When the secondary assembly is in the first limit position, the guide rod passes out of the first bearing.
[0005] In some embodiments, the first end has a first end face, the first end face is located in the hollow chamber, and the outer diameter of the first end face is smaller than the inner diameter of the first bearing.
[0006] In some embodiments, the first end has a first end face, the first end face is located in the hollow chamber, and the outer diameter of the first end face is smaller than the maximum outer diameter of the guide rod.
[0007] In some embodiments, the end of the guide rod extending into the hollow chamber is provided with a chamfered end.
[0008] In some embodiments, the secondary assembly further includes a shell and an end cover, the shell is provided with a receiving cavity, the core shaft is arranged in the receiving cavity, and the other end of the guide rod is connected with the end cover.
[0009] In some embodiments, in the axial direction of the core shaft, the first bearing is arranged at one end of the hollow chamber close to the end cover.
[0010] In some embodiments, the linear motor further comprises a second bearing, one of the primary assembly and the secondary assembly is connected with the second bearing, and a limiting boss and a limiting member are arranged on the one of the primary assembly and the secondary assembly connected with the second bearing, and the limiting boss and the limiting member jointly limit the two axial ends of the second bearing.
[0011] In some embodiments, the secondary assembly further comprises a shell and an end cover, the shell is provided with a receiving cavity, and the other end of the guide rod is connected with the end cover; an assembly hole is formed at an end of the shell away from the end cover, the core shaft is arranged in the assembly hole, the second bearing is located in the assembly hole and is sleeved on the outer peripheral wall of the core shaft, and the limiting boss is fixed on the shell and the limiting member is mounted on the shell.
[0012] In some embodiments, the secondary assembly further comprises a shell, and the shell is provided with a receiving cavity; the linear motor further comprises a first buffer member, the first buffer member is sleeved on the core shaft, the first buffer member is spaced from the inner wall of the shell when the secondary assembly is in the first limit position, and the first buffer member is compressed by the inner wall of the shell when the secondary assembly is in the second limit position.
[0013] In some embodiments, the secondary assembly further comprises an end cover, and the other end of the guide rod is connected with the end cover; the linear motor further comprises a second buffer member, the second buffer member is connected to an end of the core shaft close to the end cover and surrounds the guide rod, the second buffer member is spaced from the end cover when the secondary assembly is in the first limit position, and the second buffer member is compressed by the end cover when the secondary assembly is in the second limit position.
[0014] In some embodiments, the secondary assembly further comprises a shell and an end cover, the shell is provided with a receiving cavity, and the other end of the guide rod is connected with the end cover; the primary assembly further comprises an iron core, the iron core is located in the receiving cavity, and in the axial direction of the core shaft, the iron core divides the receiving cavity into a first cavity and a second cavity; a passage is formed in the first bearing, and the passage is used to increase the communication gap between the first cavity and the second cavity.
[0015] In some embodiments, the first cavity is farther away from the end cover than the second cavity, the first cavity communicates with the hollow chamber, the first bearing is located between the outer peripheral wall of the guide rod and the inner wall of the hollow chamber, and the first and second cavities communicate with the hollow chamber through the passage.
[0016] In some embodiments, the core shaft is provided with an opening, and the opening communicates the hollow chamber and the first cavity.
[0017] The suspension system of this application includes the linear motor described in the above embodiments.
[0018] The vehicle described in this application includes the suspension system described in the above embodiments.
[0019] In the linear motor, suspension system, and vehicle of this application, the guide rod extends a longer length into the hollow cavity when the secondary component is in the second extreme position compared to when the secondary component is in the first extreme position. When the secondary component is in the first extreme position relative to the primary component, one end of the guide rod located in the hollow cavity protrudes through the first bearing. The first bearing guides the end of the guide rod located in the hollow cavity, preventing the guide rod from tilting and thus avoiding scratches and impacts to the first bearing, reducing the likelihood of damage to the first bearing.
[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:
[0022] Figure 1 This is a schematic diagram of the structure of a linear motor according to certain embodiments of this application;
[0023] Figure 2 yes Figure 1 A schematic diagram of the primary component in a linear motor;
[0024] Figure 3 yes Figure 1 A partial structural diagram of the secondary components in a linear motor;
[0025] Figure 4 yes Figure 3 A partial structural diagram of the guide rod in a linear motor;
[0026] Figure 5 yes Figure 1 An enlarged schematic diagram of the V position in a linear motor;
[0027] Figure 6 yes Figure 1 An enlarged schematic diagram of the VI position in a linear motor;
[0028] Figure 7 yes Figure 1 A partial structural diagram of the spindle in a linear motor;
[0029] Figure 8 is Figure 7 a split schematic view of the mandrel of
[0030] Figure 9 is a structural schematic view of a vehicle of some embodiments of the present application.
[0031] Explanation of main element symbols:
[0032] 10000, vehicle; 1000, suspension system; 3000, vehicle body; 5000, vehicle wheel; 100, linear motor; 10, primary assembly; 11, mandrel; 111, hollow chamber; 113, first shaft body; 1131, mounting groove; 115, cover plate; 117, second shaft body; 13, core; 131, accommodating groove; 133, core block; 15, opening; 17, inductor; 18, high-voltage connector; 181, electrical connection; 183, female end of connector; 19, winding; 30, first bearing; 31, first end face; 33, second end face; 35, passage; 50, secondary assembly; 51, housing; 511, accommodating cavity; 512, first end of housing; 513, first cavity; 514, second end of housing; 515, second cavity; 517, assembly hole; 518, limiting boss; 519, limiting member; 55, guide rod; 551, first end of guide rod; 553, second end of guide rod; 56, end cover; 57, sensor read head; 59, magnetic member; 70, second bearing; 80, first buffer member; 90, second buffer member. DETAILED DESCRIPTION
[0033] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.
[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0035] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.
[0038] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not the only embodiment.
[0039] Generally, a linear motor includes a primary assembly, a secondary assembly and a bearing, the secondary assembly is arranged in the bearing, and the secondary assembly is movable relative to the primary assembly and the bearing. The bearing is arranged to reduce the friction between the primary assembly and the secondary assembly. However, the guide rod of the secondary assembly is easy to scratch and hit the bearing when moving relative to the bearing, which is easy to cause damage to the bearing. In order to solve this problem, the embodiments of the present application provide a linear motor 100( Figure 1 , a suspension system 1000( Figure 9 ) and a vehicle 10000( Figure 9as shown).
[0040] Referring to Figures 1 to 3 The linear motor 100 of the embodiment of the present application comprises a primary assembly 10, a first bearing 30 and a secondary assembly 50. The primary assembly 10 comprises a core shaft 11, which is provided with a hollow cavity 111. The first bearing 30 is installed in the hollow cavity 111. The secondary assembly 50 comprises a guide rod 55, one end of which extends into the hollow cavity 111 and cooperates with the first bearing 30.
[0041] In the axial direction X of the core shaft 11, the secondary assembly 50 is capable of moving relative to the primary assembly 10 between a first limit position and a second limit position. Compared with when the secondary assembly 50 is in the first limit position (bottom dead center), the length of the guide rod 55 extending into the hollow cavity 111 is longer when the secondary assembly 50 is in the second limit position (top dead center). When the secondary assembly 50 is in the first limit position (bottom dead center), the guide rod 55 penetrates out of the first bearing 30.
[0042] Specifically, in the linear motor 100 of the embodiment of the present application, the secondary assembly 50 and the primary assembly 10 are relatively movable along the axial direction X of the core shaft 11. In one embodiment, the secondary assembly 50 is movable relative to the primary assembly 10 along the axial direction X of the core shaft 11. In another embodiment, the primary assembly is movable relative to the secondary assembly 50 along the axial direction X of the core shaft 11. The secondary assembly 50 of the embodiment of the present application is movable relative to the primary assembly 10 along the axial direction X of the core shaft 11.
[0043] Referring to Figures 1 to 3 The hollow cavity 111 of the core shaft 11 is used for the guide rod 55 to extend into. In the case that the secondary assembly 50 moves relative to the primary assembly 10 along the axial direction X of the core shaft 11, the guide rod 55 is capable of moving in the hollow cavity 111. The hollow cavity 111 is capable of providing a moving space for the guide rod 55, thereby facilitating the miniaturization design of the linear motor 100. Moreover, in the case that the guide rod 55 moves in the hollow cavity 111, the core shaft 11 is capable of guiding the guide rod 55, i.e., it can ensure that the secondary assembly 50 is capable of moving relative to the primary assembly 10 along the axial direction of the core shaft 11, avoiding the secondary assembly 50 moving relative to the primary assembly 10 along a direction other than the axial direction X of the core shaft 11 (for example, the radial direction of the core shaft 11, etc.), thereby ensuring the stability of the movement of the secondary assembly 50 relative to the primary assembly 10.
[0044] The first bearing 30 comprises a first end face 31 and a second end face 33 opposite to each other in the axial direction X of the core shaft 11. The first end face 31 is an upper end face, and the second end face 33 is a lower end face. When the secondary assembly 50 is in the first limit position, the end face of the guide rod 55 in the hollow cavity 111 protrudes from the first end face 31 of the first bearing 30.
[0045] The first bearing 30 can be fixedly installed in the hollow chamber 111. The first bearing 30 can include a bearing outer ring and a bearing inner ring, the bearing outer ring is fixedly connected with the inner wall of the hollow chamber 111, and the bearing inner ring is movable relative to the bearing outer ring. One end of the guide rod 55 penetrates the bearing inner ring of the first bearing 30, and the bearing inner ring is matched with the peripheral wall of the guide rod 55. The first bearing 30 can reduce the friction between the mandrel 11 and the guide rod 55, avoid the mandrel 11 directly contacting the guide rod 55 to cause the friction between the mandrel 11 and the guide rod 55 to be too large, thereby reducing the wear of the mandrel 11 and the guide rod 55, and prolonging the service life of the mandrel 11 and the guide rod 55. In the axial direction X of the mandrel 11, the first end surface 31 of the first bearing 30 is an upper end surface, and the second end surface 33 is a lower end surface.
[0046] In some embodiments, the first bearing 30 can be integrally formed, facilitating the machining and manufacturing of the first bearing 30, and being conducive to reducing production costs. For example, the first bearing 30 can be formed by powder metallurgy sintering and pressing, and the first bearing 30 is provided with a gas hole, and the gas hole is filled with grease under high pressure. The grease can realize lubrication between the primary assembly 10 and the secondary assembly 50 during mutual movement, so that the primary assembly 10 and the secondary assembly 50 move more smoothly, and the friction is effectively reduced. For example, the grease can be lubricating oil or lubricating grease.
[0047] Please refer to Figures 1 to 3 The guide rod 55 includes opposite first and second ends 551 and 553, the first end 551 of the guide rod 55 is an upper end, and the second end 553 of the guide rod 55 is a lower end. The first end 551 of the guide rod 55 extends into the hollow chamber 111. The guide rod 55 extends into the hollow chamber 111 to cooperate with the mandrel 11.
[0048] The first limit position refers to the lowest position of the secondary assembly 50 relative to the primary assembly 10 in the axial direction X of the mandrel 11 when the secondary assembly 50 moves downward (from the first end 512 of the housing 51 to the second end 514 of the housing 51). In other words, after the secondary assembly 50 reaches the first limit position, the secondary assembly 50 cannot continue to move downward (from the first end 512 of the housing 51 to the second end 514 of the housing 51) relative to the primary assembly 10 in the axial direction X of the mandrel 11. The second limit position refers to the lowest position of the secondary assembly 50 relative to the primary assembly 10 in the axial direction X of the mandrel 11 when the secondary assembly 50 moves upward (from the second end 514 of the housing 51 to the first end 512 of the housing 51). In other words, after the secondary assembly 50 reaches the second limit position, the secondary assembly 50 cannot continue to move upward (from the second end 514 of the housing 51 to the first end 512 of the housing 51) relative to the primary assembly 10 in the axial direction X of the mandrel 11. The length L1 of the guide rod 55 extending into the hollow chamber 111 when the secondary assembly 50 is in the first limit position is less than the length L2 of the guide rod 55 extending into the hollow chamber 111 when the secondary assembly 50 is in the second limit position, i.e., L1 < L2.
[0049] During the operation of the linear motor 100, the secondary assembly 50 can move relative to the primary assembly 10 between the first limit position and the second limit position. When the secondary assembly 50 is in the first limit position, the first end 551 of the guide rod 55 is higher than the first end surface 31 of the first bearing 30, i.e., the first end 551 of the guide rod 55 protrudes relative to the first end surface 31 of the first bearing 30 by a height H > 0 mm. At this time, the bearing inner ring of the first bearing 30 can better guide the guide rod 55 to move in the axial direction X of the mandrel 11, thereby avoiding the problem of the guide rod 55 scratching and colliding with the first bearing 30, the problem of the first bearing 30 being easily damaged, and the problem of the service life of the first bearing 30 being relatively long. When the secondary assembly 50 is in the first limit position, if the first end 551 of the guide rod 55 is lower than the first end surface 31 of the first bearing 30, i.e., the first end 551 of the guide rod 55 protrudes relative to the first end surface 31 of the first bearing 30 by a height H < 0 mm, the guide portion 555 of the guide rod 55 can be inclined, thereby the guide portion 555 can scratch or even collide with the bearing inner ring of the first bearing 30, which can easily cause the first bearing 30 to be damaged.
[0050] In the linear motor 100 of the embodiments of the present application, the length of the guide rod 55 extending into the hollow chamber 111 is longer when the secondary assembly 50 is in the second limit position than when the secondary assembly 50 is in the first limit position. In the case where the secondary assembly 50 is in the first limit position relative to the primary assembly 10, the guide rod 55 penetrates the first bearing 30. The first bearing 30 can guide the guide rod 55 at one end of the hollow chamber 111, so as to avoid the problem of the guide rod 55 tilting, thereby avoiding the problem of the guide rod 55 scratching and impacting the first bearing 30, and the problem of the first bearing 30 being damaged.
[0051] The linear motor 100 will be further described below in combination with the accompanying drawings.
[0052] In some embodiments, the first end 551 of the guide rod 55 has a first end face, which is located inside the hollow chamber 111, and the outer diameter of the first end face is smaller than the inner diameter of the first bearing 30, so as to ensure that the guide rod 55 can penetrate the first bearing 30 and extend into the hollow chamber 111.
[0053] In some embodiments, the first end 551 of the guide rod 55 has a first end face. The first end face is located inside the hollow chamber 111. The outer diameter of the first end face is smaller than the maximum outer diameter of the guide rod. In the embodiments of the present application, the linear motor 100 does not rely on the guide rod 55 for limiting position.
[0054] In some embodiments, the secondary assembly 50 further comprises a housing 51 and an end cover 56. The housing 51 is provided with a receiving cavity 511, and the mandrel 11 is arranged in the receiving cavity 511. The second end 553 of the guide rod 55 is connected with the end cover 56.
[0055] The housing 51 is a structure for mounting and protecting other elements. The housing 51 of the present application is used to mount the mandrel 11, the guide rod 55 and other elements of the linear motor 100 therein. In the axial direction X of the mandrel 11, the housing 51 comprises opposite first and second ends 512 and 514. The first end 512 of the housing 51 is the upper end, and the second end 514 of the housing 51 is the lower end. The mandrel 11 is mounted in the receiving cavity 511 and at least partially extends out of the first end 512 of the housing 51.
[0056] The guide rod 55 and the end cover 56 are detachably or non-detachably connected. The end cover 56 is used to connect with the lower fork arm 300 of the suspension system 1000. The end cover 56 is detachably connected with the lower fork arm 300 of the suspension system 1000, wherein the detachable connection mode can be but is not limited to threaded connection, screw connection or buckle connection, etc. The connection mode of the end cover 56 of the present application and the lower fork arm 300 of the suspension system 1000 is screw connection. The lower fork arm 300 of the suspension system 1000 is detachably connected with the second end 514 of the housing 51, wherein the detachable connection mode can be but is not limited to threaded connection, screw connection or buckle connection, etc. In the case of movement of the secondary assembly 50 relative to the primary assembly 10, the guide rod 55 can move in the hollow chamber 111, so that the guide rod 55 can drive the lower fork arm 300 of the suspension system 1000 to move together through the end cover 56, and the lower fork arm 300 of the suspension system 1000 can drive the housing 51 to move together.
[0057] Please refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 5 In some embodiments, the end of the first end 551 of the guide rod 55 is provided with a chamfer.
[0058] In the process of installing the primary assembly 10, the secondary assembly 50 and the first bearing 30, the first bearing 30 is first installed in the hollow chamber 111 of the primary assembly 10, and then the guide rod 55 of the secondary assembly 50 is inserted into the first bearing 30 along the second end surface 33 of the first bearing 30 towards the first end surface 31 and enters the hollow chamber 111. In the case that the end of the first end 551 of the guide rod 55 is not provided with a chamfer, since the guide rod 55 is a column structure, there will be sharp corners on the periphery of the end of the guide rod 55. In the case that the guide rod 55 is inserted into the first bearing 30 along the second end surface 33 of the first bearing 30 towards the first end surface 31, the sharp corners of the end of the guide rod 55 are easy to scratch the bearing inner ring of the first bearing 30, which can cause damage to the first bearing 30. In the case that the end of the first end 551 of the guide rod 55 is provided with a chamfer, in the case that the guide rod 55 is inserted into the first bearing 30 along the second end surface 33 of the first bearing 30 towards the first end surface 31, the end of the guide rod 55 is not easy to scratch the bearing inner ring of the first bearing 30, and the first bearing 30 is not easy to be damaged, which can better protect the first bearing 30.
[0059] In one embodiment, the end of the guide rod 55 extending into the hollow chamber 111 is provided with a rounded corner. In this case, the guide rod 55 is less likely to scratch the inner ring of the first bearing 30 when the first bearing 30 is penetrated by the guide rod 55, and the guide rod 55 has better appearance. In another embodiment, the end of the guide rod 55 extending into the hollow chamber 111 is provided with a right-angled corner. In this case, the guide rod 55 is less likely to scratch the inner ring of the first bearing 30 when the first bearing 30 is penetrated by the guide rod 55, and the guide rod 55 is easier to process.
[0060] The current first bearing is usually arranged at the upper end of the housing. In the case that the secondary assembly moves relative to the primary assembly to the first limit position, and the upper end of the guide rod needs to be higher than the upper end surface of the first bearing, the length of the guide rod needs to be set longer. In the case that the length of the guide rod is too long, on the one hand, the machining precision of the guide rod is affected, and on the other hand, the guide rod is completely positioned from the upper end. When the guide rod moves to the lowermost end, the primary assembly is easily knocked together, the guide rod is worn, and the overall structure of the linear motor is invalid.
[0061] Please refer to Figure 1 and Figure 2 In the embodiments of the present application, the first bearing 30 is arranged at the end of the hollow chamber 111 close to the end cover 56 in the axial direction X of the mandrel 11. In the case that the secondary assembly 50 moves relative to the primary assembly 10 to the first limit position, and the first end 551 of the guide rod 55 is higher than the first end surface 31 of the first bearing 30, the length of the guide rod 55 can be shorter. In the case that the length of the guide rod 55 is shorter, on the one hand, the material cost of the guide rod 55 can be saved, and on the other hand, the machining precision and strength of the guide rod 55 can be ensured, the overall structure of the linear motor 100 is more reasonable, the guide rod 55 is less likely to knock with the primary assembly 10 in the moving process, and the linear motor 100 is less likely to fail.
[0062] Please refer to Figure 1 and Figure 5 In some embodiments, the primary assembly 10 further includes a core 13, which is located in the receiving cavity 511 and separates the receiving cavity 511 into a first cavity 513 and a second cavity 515 in the axial direction X of the mandrel 11. The first bearing 30 is provided with a passage 35 for increasing the communication gap between the first cavity 513 and the second cavity 515.
[0063] The first cavity 513 is close to the first end 512 of the shell 51, and the second cavity 515 is close to the second end 514 of the shell 51. The primary assembly 10 and the secondary assembly 50 have an air gap, facilitating the relative movement of the primary assembly 10 and the secondary assembly 50, and the air gap realizes the communication between the first cavity 513 and the second cavity 515. However, the inventors of the present application find that in the related art, when the secondary assembly 50 moves along the axis direction X of the core shaft 11, the pressure of the first cavity 513 and the second cavity 515 changes. Since the air gap between the primary assembly 10 and the secondary assembly is small, the flow area between the first cavity 513 and the second cavity 515 is small, thereby increasing the resistance of the mutual movement of the primary assembly 10 and the secondary assembly, increasing the energy consumption of the linear motor 100, causing the linear motor 100 to heat, and easily causing the linear motor 100 to be damaged, thereby reducing the service life.
[0064] Therefore, in order to solve the problem of large mutual movement resistance of the primary assembly 10 and the secondary assembly 50, the first bearing 30 of the present application is provided with a channel 35, which can increase the communication air gap between the first cavity 513 and the second cavity 515, so that the airflow can flow through the air gap between the primary assembly 10 and the secondary assembly 50, and the airflow can flow between the first cavity 513 and the second cavity 515 through the channel 35, thereby increasing the flow area between the first cavity 513 and the second cavity 515, which is conducive to adjusting the pressure difference between the first cavity 513 and the second cavity 515, effectively improving the air pressure, and can reduce or avoid the problem that the relative movement of the primary assembly 10 and the secondary assembly 50 is affected by the pressure difference and fluctuates, thereby reducing the resistance of the mutual movement of the primary assembly 10 and the secondary assembly 50, such as reducing the air resistance caused by the change in volume of the first cavity 513 and the second cavity 515 when the guide rod 55 moves, so that the primary assembly 10 and the secondary assembly 50 move more smoothly, which is conducive to prolonging the service life of the linear motor 100. At the same time, the channel 35 is machined on the first bearing 30, which is more convenient and simple to process, and is conducive to reducing production costs.
[0065] Please refer to Figure 5 In the embodiments of the present application, the specific shape of the channel 35 can be set according to actual conditions. For example, the channel 35 can be formed as a square groove, a triangular groove, etc. For example, in some embodiments, the channel 35 can be an arc-shaped groove, which can avoid the problem of stress concentration on the first bearing 30, and is conducive to improving the structural strength of the first bearing 30.
[0066] In some embodiments of the present application, the plurality of channels 35 are unevenly distributed along the circumferential direction of the first bearing 30, that is, along the circumferential direction of the channels 35, the spacing between any two adjacent channels 35 in the plurality of channels 35 is different, which can effectively reduce noise, vibration, harshness (NVH) and other problems, and meet the required use requirements.
[0067] In the linear motor 100 according to the embodiments of the present application, the first cavity 513 and the second cavity 515 are respectively arranged between the opposite ends of the core 13 of the primary assembly 10 and the housing 51, the first bearing 30 is arranged between the core shaft 11 and the guide rod 55, and the channel 35 is formed in the first bearing 30 to increase the communication gap between the first cavity 513 and the second cavity 515, so that the airflow can flow through the air gap between the primary assembly 10 and the secondary assembly 50, and can also flow between the first cavity 513 and the second cavity 515 through the channel 35, thereby increasing the flow area between the first cavity 513 and the second cavity 515, facilitating the adjustment of the pressure difference between the first cavity 513 and the second cavity 515, and making the primary assembly 10 and the secondary assembly 50 move more smoothly, which is beneficial to prolong the service life of the linear motor 100. Moreover, the channel 35 is more convenient to process on the first bearing 30, and the processing is simple, which is beneficial to reduce the production cost.
[0068] Please refer to Figure 1 and Figure 5 Further, in some embodiments, the first cavity 513 communicates with the hollow chamber 111, the first bearing 30 is located between the outer peripheral wall of the guide rod 55 and the inner wall of the hollow chamber 111, and the second cavity 515 communicates with the hollow chamber 111 through the channel 35.
[0069] Specifically, the first bearing 30 is arranged between the outer peripheral wall of the guide rod 55 and the inner wall of the hollow chamber 111, so that when the guide rod 55 slides in the hollow chamber 111, the friction between the guide rod 55 and the inner wall of the hollow chamber 111 can be reduced through the first bearing 30, which is beneficial to reduce the degree of wear and prolong the service life of the linear motor 100.
[0070] The hollow chamber 111 and the second cavity 515 are communicated, the second cavity 515 and the hollow chamber 111 are communicated through the channel 35, that is, the airflow of the second cavity 515 can flow to the hollow chamber 111 through the channel 35 and flow to the first cavity 513 through the hollow chamber 111, or the airflow of the first cavity 513 can flow to the second cavity 515 from the channel 35 through the hollow chamber 111, so that the first cavity 513 and the second cavity 515 are communicated, the required communication requirement is met, so that the airflow can flow from the radial inner side and the radial outer side of the primary assembly 10, the flow area is increased, the resistance of the mutual movement of the primary assembly 10 and the secondary assembly 50 is reduced, the mutual movement of the primary assembly 10 and the secondary assembly 50 is smoother, and the processing and manufacturing are facilitated, which is beneficial to reduce the production cost of the linear motor 100.
[0071] In some embodiments, in order to meet the coaxiality requirement of the linear motor 100, the gap between the guide rod 55 and the first bearing 30 is small. When the guide rod 55 cooperates with the first bearing 30, due to the friction between each other, for example, when the load is large or the movement speed of the secondary assembly 50 in the axial direction of the primary assembly 10 is large, the temperature of the guide rod 55 and the first bearing 30 gradually increases, so that the first bearing 30 and the guide rod 55 are both expanded by heat, which is easy to cause the interference fit of the guide rod 55 and the first bearing 30. Therefore, the channel 35 is formed on the first bearing 30, so that the airflow of the first cavity 513 and the hollow chamber 111 can flow to each other through the channel 35, avoiding the problem of plugging, so that the mutual movement of the primary assembly 10 and the secondary assembly 50 is smoother.
[0072] Please refer to Figure 1 and Figure 5 Further, in some embodiments, the mandrel 11 is provided with an opening 15, and the opening 15 communicates the hollow chamber 111 and the first cavity 513. The first cavity 513 is communicated with the hollow chamber 111 through the opening 15, and the hollow chamber 111 is communicated with the second cavity through the channel 35, so as to realize the communication between the first cavity 513 and the second cavity 515, reduce the resistance of the mutual movement of the primary assembly 10 and the secondary assembly 50, make the mutual movement of the primary assembly 10 and the secondary assembly 50 more smooth, facilitate the processing and manufacturing, and be beneficial to reduce the production cost of the linear motor 100.
[0073] Please refer to Figure 1 and Figure 6 In some embodiments, the linear motor 100 further comprises a second bearing 70, one of the primary assembly 10 and the secondary assembly 50 is fixedly connected with the second bearing 70, and the one of the primary assembly 10 and the secondary assembly 50 fixedly connected with the second bearing 70 is provided with a limiting boss 518 and a limiting piece 519, and the limiting boss 518 and the limiting piece 519 jointly limit the axial two ends of the second bearing 70.
[0074] In some embodiments, the second bearing 70 can include a bearing outer ring and a bearing inner ring, the bearing inner ring being movable relative to the bearing inner ring. The bearing outer ring is fixedly arranged on the housing 51, and the bearing inner ring is matched with the outer circumferential wall of the mandrel 11. The arrangement of the second bearing 70 can reduce the friction between the housing 51 and the mandrel 11, avoid the process of friction between the housing 51 and the mandrel 11 caused by the direct contact between the housing 51 and the mandrel 11, thereby reducing the wear of the mandrel 11 and prolonging the service life of the mandrel 11.
[0075] The limiting member 519 and the limiting boss 518 are used to limit the second bearing 70 at both axial ends, which can enhance the connection stability of the second bearing 70 on the secondary assembly 50 or the primary assembly 10, and make full use of the space in the axial direction of the linear motor 100, so that the overall structure of the limiting member 519, the limiting boss 518 and the second bearing 70 is compact.
[0076] For example, the secondary assembly 50 can be fixedly connected with the second bearing 70, and the limiting boss 518 and the limiting member 519 can be arranged on the secondary assembly 50. For another example, the primary assembly 10 can be fixedly connected with the second bearing 70, and the limiting boss 518 and the limiting member 519 can be arranged on the primary assembly 10.
[0077] For example, when the linear motor 100 is working, vibration can be generated. Through the cooperation of the limiting member 519 and the limiting boss 518, the movement or falling off of the second bearing 70 caused by vibration can be avoided, thereby improving the stability of the connection of the second bearing 70 in the axial direction and being beneficial to improving the overall stability of the linear motor 100.
[0078] According to the linear motor 100 of the embodiment of the present application, the limiting boss 518 and the limiting member 519 are used to limit the second bearing 70 at both axial ends, which can reduce the possibility of movement or falling off of the second bearing 70 at both axial ends, enhance the connection stability of the second bearing 70 on the secondary assembly 50 or the primary assembly 10, and thereby improve the overall stability of the linear motor 100; and the space in the axial direction of the linear motor 100 can be fully utilized, so that the overall structure of the limiting member 519, the limiting boss 518 and the second bearing 70 is compact.
[0079] Please refer to Figure 1 and Figure 6Specifically, in some embodiments, the first end 512 of the shell 51 is formed with an assembly hole 517, the mandrel 11 is arranged in the assembly hole 517, the second bearing 70 is arranged in the assembly hole 517 and is sleeved on the outer circumferential wall of the mandrel 11, and the shell 51 is fixed with a limiting boss 518 and is provided with a limiting member 519.
[0080] The assembly hole 517 can facilitate the installation of the primary assembly 10. The second bearing 70 is sleeved on the outer circumferential wall of the mandrel 11, and the second bearing 70 is installed on the limiting boss 518 on the inner wall of the assembly hole 517. The second bearing 70 cooperates with the mandrel 11 to support the mandrel 11, which can enhance the stability of the mandrel 11 and reduce the vibration of the mandrel 11 during the operation of the linear motor 100.
[0081] Optionally, the fixing of the limiting boss 518 on the shell 51 can include the following cases: for example, the limiting boss 518 is connected to the shell 51 by welding, which can make the connection between the limiting boss 518 and the shell 51 simple and stable; for another example, the limiting boss 518 is integrally formed on the shell 51, which can enhance the overall structural strength of the shell 51 and can eliminate the assembly process of the limiting boss 518 and the shell 51.
[0082] The limiting boss 518 is annular and extends along the circumferential direction of the first bearing 30, which can increase the contact area between the limiting boss 518 and the first bearing 30, thereby enhancing the limiting effect of the limiting boss 518 on the first bearing 30 and further enhancing the connection stability of the first bearing 30 on the shell 51, so as to avoid the movement or falling off of the first bearing 30 at the axial end away from the limiting member 519.
[0083] According to some embodiments of the present application, the limiting member 519 is annular and extends along the circumferential direction of the second bearing 70, which can increase the contact area between the limiting member 519 and the second bearing 70, thereby enhancing the limiting effect of the limiting member 519 on the second bearing 70 at the axial side away from the limiting boss 518 and further enhancing the connection stability of the second bearing 70 on the shell 51, so as to avoid the movement or falling off of the first bearing 30 at the axial end away from the limiting boss 518.
[0084] According to some embodiments of the present application, the limiting member 519 can be an elastic retainer ring or a metal ring or a circlip, which has high structural strength and wear resistance, can effectively block the movement of the first bearing 30 in the axial direction, and is conducive to prolonging the service life of the linear motor 100. According to some embodiments of the present application, the limiting member 519 is interference-fitted in the assembly hole 517, which makes the connection between the limiting member 519 and the shell 51 simple and stable, and can reduce the possibility of loosening or falling off of the limiting member 519 due to the vibration or external impact of the linear motor 100.
[0085] Referring to Figure 1 In some embodiments, the linear motor 100 further comprises a first buffer 80, the first buffer 80 is sleeved on the shaft 11, when the secondary assembly 50 is at the first limit position, the first buffer 80 is spaced from the inner wall of the shell 51, when the secondary assembly 50 is at the second limit position, the first buffer 80 is compressed by the inner wall of the shell 51.
[0086] The first buffer 80 is sleeved on the end of the shaft 11 away from the end cover 56. During the movement of the secondary assembly 50 from the first limit position to the second limit position, the shaft 11 gradually approaches the first end 512 of the shell 51. When the secondary assembly 50 is at the second limit position, the shaft 11 abuts against the first end 512 of the shell 51. The first buffer 80 is used to buffer the collision between the shaft 11 and the first end 512 of the shell 51, so as to avoid the abrasion between the shaft 11 and the first end 512 of the shell 51.
[0087] Referring to Figure 1 In some embodiments, the linear motor 100 further comprises a second buffer 90, the second buffer 90 is connected to the end of the shaft 11 close to the end cover 56 and surrounds the guide rod 55, when the secondary assembly 50 is at the first limit position, the second buffer 90 is spaced from the end cover 56, when the secondary assembly 50 is at the second limit position, the second buffer 90 is compressed by the end cover 56.
[0088] During the movement of the secondary assembly 50 from the first limit position to the second limit position, the end cover 56 gradually approaches the end of the shaft 11. When the secondary assembly 50 is at the second limit position, the end cover 56 abuts against the end of the shaft 11. The second buffer 90 is used to buffer the collision between the end of the shaft 11 and the end cover 56, so as to avoid the abrasion between the shaft 11 and the end cover 56. It should be noted that, in some embodiments, the material of the second buffer 90 can include but is not limited to at least one of rubber, silicone and plastic.
[0089] Referring to Figure 7 and Figure 8 In some embodiments, the shaft 11 comprises a first shaft body 113 and a cover plate 115, a peripheral wall of the first shaft body 113 is provided with a mounting groove 1131, the cover plate 115 is connected with the first shaft body 113 to block the mounting groove 1131 from the peripheral surface; the primary assembly 10 further comprises an inductor 17, the inductor 17 is arranged in the mounting groove 1131, and the cover plate 115 covers the inductor 17.
[0090] Specifically, in some embodiments, the installation groove 1131 is recessed from the outer side of the peripheral wall of the first shaft body 113 towards the direction of the central axis of the first shaft body 113, and the inductive piece 17 is arranged in the installation groove 1131. Wherein, the installation groove 1131 is arranged on one hand to facilitate the installation and positioning of the inductive piece 17 on the mandrel 11, thereby facilitating the improvement of the assembly efficiency of the primary assembly 10; on the other hand, it can reduce the size of the mandrel 11 and the inductive piece 17 in the radial direction of the mandrel 11, thereby facilitating the miniaturization of the primary assembly 10.
[0091] In some embodiments, the inductive piece 17 can include, but is not limited to, an electromagnetic sensor, an optoelectronic sensor, or an ultrasonic sensor, etc. In the embodiments of the present application, only the inductive piece 17 is taken as a magnetic stripe as an example for description.
[0092] In some embodiments, the first shaft body 113 and the cover plate 115 can be combined together by a detachable connection mode. The detachable connection mode includes, but is not limited to, threaded connection or snap connection, etc. In other embodiments, the first shaft body 113 and the cover plate 115 can be combined together by a non-detachable connection mode. The non-detachable connection mode includes, but is not limited to, welding or bonding, etc. Exemplarily, the first shaft body 113 and the cover plate 115 can be combined together by a welding connection mode, thereby improving the bonding strength between the first shaft body 113 and the cover plate 115, preventing the separation between the first shaft body 113 and the cover plate 115 during the operation of the linear motor 100, and thereby improving the stability and reliability of the linear motor 100. Wherein, the welding includes, but is not limited to, ultrasonic welding, molecular diffusion welding, and laser welding, etc.
[0093] In the primary assembly 10 of the embodiments of the present application, the peripheral wall of the first shaft body 113 is provided with the installation groove 1131, the cover plate 115 is connected with the first shaft body 113 to block the installation groove 1131 from the peripheral surface, the inductive piece 17 is arranged in the installation groove 1131, and the cover plate 115 covers the inductive piece 17, thereby preventing the water or dust and other impurities in the external environment from contacting the inductive piece 17, reducing the possibility of damage and failure of the inductive piece 17, and thereby improving the stability and reliability of the linear motor 100.
[0094] Please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8Further, in some embodiments, the mandrel 11 further comprises a second shaft body 117, and the first shaft body 113 is connected with the second shaft body 117 in the axial direction X of the mandrel 11. In some embodiments, the first shaft body 113 and the second shaft body 117 are integrally formed, i.e., the first shaft body 113 and the second shaft body 117 are in one integral structure. In other embodiments, the first shaft body 113 and the second shaft body 117 are separately formed, i.e., the first shaft body 113 and the second shaft body 117 are in two different structures, and the first shaft body 113 and the second shaft body 117 can be combined together by a detachable connection manner or a non-detachable connection manner. The detachable connection manner includes but is not limited to threaded connection or snap connection, etc. The non-detachable connection manner includes but is not limited to welding or bonding, etc.
[0095] Referring to Figure 1 and Figure 2 In some embodiments, the primary assembly 10 further comprises a winding 19. The core 13 is sleeved and installed outside the peripheral wall of the second shaft body 117, and the core 13 is provided with a plurality of spaced accommodating grooves 131 in the axial direction X of the mandrel 11. The winding 19 is arranged in the accommodating groove 131.
[0096] Specifically, in some embodiments, when the winding 19 passes through electric current, the winding 19 can generate a magnetic field, and the core 13 can concentrate the magnetic field generated by the winding 19, so that the magnetic field generated by the winding 19 can act on the secondary assembly 50 as much as possible, thereby ensuring the stability and reliability of the relative movement between the primary assembly 10 and the secondary assembly 50.
[0097] In some embodiments, the core 13 and the second shaft body 117 can be combined together by a detachable connection manner. The detachable connection manner includes but is not limited to threaded connection or snap connection, etc. In other embodiments, the core 13 and the second shaft body 117 can be combined together by a non-detachable connection manner. The non-detachable connection manner includes but is not limited to welding or bonding, etc.
[0098] Referring to Figure 1 and Figure 2 In some embodiments, the core 13 comprises a plurality of core blocks 133, and the plurality of core blocks 133 are stacked in the axial direction of the mandrel 11, and two adjacent core blocks 133 jointly form the accommodating groove 131.
[0099] Specifically, in some embodiments, the iron core block 133 can include a main body part connectable with the second shaft body 117 and a protruding part protruding from one end of the main body part in a direction away from the second shaft body 117, so that, in the case of stacking a plurality of iron core blocks 133, two adjacent iron core blocks 133 can jointly form the accommodation groove 131.
[0100] Referring to Figure 1 Further, in some embodiments, the primary assembly 10 further includes a high-voltage connector 18 accommodated in the hollow chamber 111 and electrically connected with the winding 19 through an electrical connector 181. The high-voltage connector 18 is arranged in the hollow chamber 111, so as to, on the one hand, reduce the possibility of mechanical damage to the high-voltage connector 18, improve the insulation of the high-voltage connector 18, and ensure the normal operation of the primary assembly 10; and on the other hand, reduce the space occupied by the high-voltage connector 18 and the shaft 11, improve the compactness of the structure of the primary assembly 10, and facilitate the miniaturization of the primary assembly 10 and the linear motor 100.
[0101] Referring to Figure 1 Specifically, in some embodiments, the high-voltage connector 18 further includes a connector female end 183 located outside the hollow chamber 111, the connector female end 183 being capable of transmitting electrical energy to the high-voltage connector 18 and transmitting the electrical energy to the winding 19 through the three-phase terminals of the high-voltage connector 18, so as to make the winding 19 generate a magnetic field.
[0102] Referring to Figure 1 and Figure 6 In some embodiments, the secondary assembly 50 includes a sensor read head 57 cooperating with the inductor 17 of the primary assembly 10 to detect the position change between the secondary assembly 50 and the primary assembly 10.
[0103] For example, in the case where the first inductor 17 is a magnetic grid and the second inductor 17 is the sensor read head 57, the magnetic grid and the sensor read head 57 are spaced apart from each other, and the sensor read head 57 is capable of moving along the axial direction of the shaft 11 relative to the magnetic grid, wherein, in the process of moving the sensor read head 57 relative to the magnetic grid, the sensor read head 57 can generate a corresponding signal according to the change of the magnetic field of the magnetic grid, and detect the position change between the secondary assembly 50 and the primary assembly 10 according to the signal.
[0104] Referring to Figure 1 In some embodiments, the secondary assembly 50 further includes a magnetic member 59 accommodated in the accommodating cavity 511, the magnetic member 59 being used to cooperate with the winding 19 to enable the shell 51 to move relative to the shaft 11.
[0105] Specifically, in some embodiments, the magnetic piece 59 is arranged on the inner wall of the shell 51, and the core 13 and the magnetic piece 59 are accommodated in the accommodating cavity 511 and opposite to the magnetic piece 59. Wherein, in the case that the winding 19 passes through the current, the winding 19 can generate a magnetic field, and the magnetic field generated by the winding 19 can interact with the magnetic field generated by the magnetic piece 59 to generate an acting force to drive the shell 51 to move relative to the core shaft 11, thereby the secondary assembly 50 can move relative to the primary assembly 10 along the axial direction of the core shaft 11. It should be noted that, in some embodiments, the magnetic piece 59 can be a magnetic steel.
[0106] Referring to Figure 9 The suspension system 1000 of the embodiment of the present application comprises the linear motor 100 of the above-mentioned embodiment. It can be understood that, since the suspension system 1000 of the embodiment of the present application comprises the linear motor 100 of the above-mentioned embodiment, the suspension system 1000 at least comprises the same beneficial effects as the linear motor 100, which will not be repeated here.
[0107] In the suspension system 1000 of the embodiment of the present application, the length of the guide rod 55 extending into the hollow chamber 111 is longer when the secondary assembly 50 is in the second limit position than when the secondary assembly 50 is in the first limit position. In the case that the secondary assembly 50 is in the first limit position relative to the primary assembly 10, the guide rod 55 penetrates out of the first bearing 30. The first bearing 30 can guide the end of the guide rod 55 located in the hollow chamber 111, which can avoid the problem of the guide rod 55 tilting, thereby avoiding the problem of the guide rod 55 scratching and impacting the first bearing 30, and the problem of the first bearing 30 being damaged.
[0108] Referring to Figure 9 The vehicle 10000 of the embodiment of the present application comprises the suspension system 1000 of the above-mentioned embodiment. The vehicle 10000 includes but is not limited to a passenger vehicle 10000 such as an electric vehicle 10000, a hybrid vehicle 10000, or a large engineering vehicle 10000 under not very harsh working conditions. It can be understood that, since the vehicle 10000 of the embodiment of the present application comprises the suspension system 1000 of the above-mentioned embodiment, the vehicle 10000 at least comprises the same beneficial effects as the suspension system 1000, which will not be repeated here.
[0109] Specifically, in some embodiments, the vehicle 10000 further comprises a vehicle body 3000 and a wheel 5000, the wheel 5000 is arranged on the wheel 5000 and can move relative to the vehicle body 3000. The suspension system 1000 further comprises a suspension, the linear motor 100 is arranged on the suspension, and one end of the linear motor 100 is connected with the vehicle body 3000. Wherein, in the case of stable operation of the linear motor 100, the linear motor 100 can drive the wheel 5000 to move relative to the vehicle body 3000, thereby the position detection component can determine the relative displacement between the vehicle body 3000 and the wheel 5000 according to the position change between the primary assembly 10 and the secondary assembly 50.
[0110] In the vehicle 10000 of the embodiments of the present application, compared with the case that the secondary assembly 50 is in the first limit position, the length of the guide rod 55 extending into the hollow chamber 111 is longer when the secondary assembly 50 is in the second limit position. In the case that the secondary assembly 50 is in the first limit position relative to the primary assembly 10, the guide rod 55 penetrates out of the first bearing 30. The first bearing 30 can play a guiding role for one end of the guide rod 55 located in the hollow chamber 111, which can avoid the problem of inclination of the guide rod 55, thereby avoiding the problem of scratching and impacting the first bearing 30 by the guide rod 55, and the problem of damage to the first bearing 30 is less likely to occur.
[0111] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure. Meanwhile, other embodiments can be derived by using the above-described embodiments, so that structural and logical substitutions and changes can be made without departing from the scope of the present disclosure.
[0112] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.
Claims
1. A linear motor (100), characterized in that The application relates to a linear motor, comprising: a primary assembly (10) comprising a mandrel (11) provided with a hollow chamber (111); a first bearing (30) mounted in the hollow chamber (111); and a secondary assembly (50) comprising a guide rod (55) with one end extending into the hollow chamber (111) and penetrating the first bearing (30); in the axial direction of the mandrel (11), the secondary assembly (50) is movable relative to the primary assembly (10) between a first limit position and a second limit position, the length of the guide rod (55) extending into the hollow chamber (111) is longer when the secondary assembly (50) is in the second limit position than when the secondary assembly (50) is in the first limit position, and the first end (551) of the guide rod (55) is higher than the first end surface (31) of the first bearing (30) when the secondary assembly (50) is in the first limit position.
2. Linear motor (100) according to claim 1, characterized in that The first end (551) has a first end surface located in the hollow chamber (111), and the outer diameter of the first end surface is smaller than the inner diameter of the first bearing (30).
3. The linear motor (100) according to claim 1, characterized in that The first end (551) has a first end surface located in the hollow chamber (111), and the outer diameter of the first end surface is smaller than the maximum outer diameter of the guide rod.
4. The linear motor (100) of claim 1, characterized in that, The end of the guide rod (55) extending into the hollow chamber (111) is provided with a chamfer.
5. The linear motor (100) of claim 1, characterized in that, The secondary assembly (50) further comprises a housing (51) provided with a receiving cavity (511) in which the mandrel (11) is arranged, and an end cover (56) connected to the other end of the guide rod (55).
6. The linear motor (100) according to claim 5, characterized in that In the axial direction of the mandrel (11), the first bearing (30) is arranged at one end of the hollow chamber (111) close to the end cover (56).
7. The linear motor (100) according to claim 1, characterized in that The secondary assembly (50) further comprises a housing (51) provided with a receiving cavity (511); and the linear motor (100) further comprises: a first buffer (80) sleeved on the mandrel (11), the first buffer (80) is spaced from the inner wall of the housing (51) when the secondary assembly (50) is in the first limit position, and the first buffer (80) is compressed by the inner wall of the housing (51) when the secondary assembly (50) is in the second limit position.
8. The linear motor (100) of claim 1, characterized in that, The secondary assembly (50) further comprises a housing (51) provided with a receiving cavity (511), and an end cover (56), the other end of the guide rod (55) being connected with the end cover (56); the primary assembly (10) further comprises an iron core (13), the iron core (13) being located in the receiving cavity (511), and in the axial direction of the core shaft (11), the iron core (13) divides the receiving cavity (511) into a first cavity (513) and a second cavity (515), the first bearing (30) being provided with a passage (35) for increasing the communication gap between the first cavity (513) and the second cavity (515).
9. The linear motor (100) according to claim 8, characterized in that The first cavity (513) is farther away from the end cover (56) than the second cavity (515), the first cavity (513) being in communication with the hollow chamber (111), the first bearing (30) being located between the outer peripheral wall of the guide rod (55) and the inner wall of the hollow chamber (111), and the second cavity (515) being in communication with the hollow chamber (111) through the passage (35).
10. The linear motor (100) according to claim 9, characterized in that The core shaft (11) is provided with an opening (15) in communication with the hollow chamber (111) and the first cavity (513).
11. A suspension system (1000) characterized by, The linear motor (100) according to any one of claims 1-10. The suspension system (1000) according to claim 11.
12. A vehicle (10000), characterized by