Linear motor, shock absorber, suspension system and vehicle
By fixing the buffer member and guide rod to the end cover in a linear motor, combining the guide and buffering effects, the impact and abnormal noise during the movement of the mover and stator is solved, and better shock absorption effect and system stability are achieved.
Patent Information
- Application Number
- CN202421221802.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In automobile suspension systems, the movers and stator in the linear motor are prone to impact during relative motion, and abnormal noises will also occur when the buffer member is fixed to the mover assembly.
A linear motor is designed in which the buffer member and the guide rod are fixed to the end cover, and the mating module and the damping module move relatively in the axial direction of the sleeve. The guide rod is used for guidance, and the buffer member is used for buffering to avoid impact and friction. There is no relative movement between the piece and the guide rod to prevent abnormal noise.
It effectively prevents abnormal noise between the mating module and the end cap in the linear motor, and improves the shock absorption effect through the elastic deformation of the buffer member, enhancing the stability and service life of the system.
Smart Images
Figure CN222346680U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the automotive field, and in particular to a linear motor, a shock absorber, a suspension system and a vehicle. Background Art
[0002] With the rapid development of automobiles, the suspension system in automobiles has changed from traditional hydraulic suspension to electric suspension. The electric suspension is mainly adjusted by the relative movement of the mover and stator in the linear motor. However, the mover and stator are prone to collision during the relative movement, resulting in abnormal noise. In order to solve the abnormal noise problem, a buffer is set between the mover and the stator to prevent the mover and the stator from colliding. The buffer is generally fixed on the mover assembly, and the buffer is prone to abnormal noise when it moves with the mover assembly. Utility Model Content
[0003] The purpose of the present application is to provide a linear motor, a shock absorber, a suspension system and a vehicle. In the linear motor, the buffer and the guide rod are both fixed to the end cover, which is helpful to prevent abnormal noise.
[0004] The first aspect of the present application provides a linear motor, including a matching module and a damping module. The damping module includes a sleeve, an end cover, a buffer and a guide rod, and the sleeve is provided with a housing cavity with a first opening. The end cover is fixed to the sleeve to close the first opening. The guide rod and the buffer are both arranged in the housing cavity, one end of the guide rod is fixed to the end cover, and the axial directions of the guide rod and the sleeve are the same. The buffer is sleeved on the guide rod and fixedly connected to the end cover.
[0005] The matching module is at least partially installed in the accommodating cavity, the matching module and the damping module can move relatively along the axial direction of the sleeve, the guide rod is used to guide the matching module, and the buffer is used to buffer the matching module. One of the matching module and the damping module is a stator, and the other is a mover.
[0006] In the linear motor provided in the embodiment of the present application, the mating module can move relative to the damping module along the axial direction of the sleeve, the guide rod is used to guide the mating module, and the buffer is used to buffer the mating module. For example, the mating module moves toward the buffer, the mating module abuts the buffer, and the buffer buffers the mating module to prevent the mating module from rigidly colliding with the end cover, so as to avoid abnormal noise between the mating module and the end cover. In addition, since the buffer and the guide rod are both fixed to the end cover, before the mating module abuts the buffer, the buffer and the guide rod will not move relative to each other, and no friction will be generated between the buffer and the guide rod, so that no abnormal noise will occur between the buffer and the guide rod.
[0007] In some embodiments, the end cover includes a mounting surface, the mounting surface faces the accommodating cavity. The end cover is provided with a clamping piece, the clamping piece is convexly arranged on the mounting surface, and the buffer piece is clamped to the clamping piece. By providing the clamping piece to fix the buffer piece, assembly is convenient.
[0008] In some embodiments, the clamping member includes a first boss, which is convexly disposed on a side of the clamping member facing the guide rod. Along the axial direction of the sleeve, the first boss is spaced apart from the mounting surface. The buffer member includes a second boss, which is convexly disposed on a side of the buffer member facing the clamping member. When the buffer member is clamped to the clamping member, the second boss is clamped into the space between the first boss and the mounting surface, so that the buffer member is fixed to the end cover.
[0009] In some embodiments, the buffer includes an arc segment and a support segment. Along the axial direction of the sleeve, the arc segment and the support segment are connected, the support segment is fixed to the end cover, and the arc segment is located on the side of the support segment away from the end cover. Both ends of the arc segment along the axial direction of the sleeve are bent toward the guide rod, and the arc segment and the guide rod enclose a buffer cavity. By providing the buffer cavity, when the mating module abuts the arc segment, the arc segment is more likely to elastically deform toward the buffer cavity, so that the buffer can better buffer the mating module.
[0010] In some embodiments, along the direction from the end cap to the buffer, the difference between the outer diameter and the inner diameter of the curved segment gradually decreases.
[0011] In some embodiments, an inclined guide surface is provided on one side of the support section facing the end cap. By providing the inclined guide surface, the buffer can be more easily sleeved on the guide rod, thereby improving assembly efficiency.
[0012] In some embodiments, the matching module is a mover and the damping module is a stator. The matching module includes a piston rod and a coil assembly. One end of the piston rod extends into the accommodating chamber, the piston rod is sleeved on the guide rod, the piston rod is located on the side of the buffer away from the end cover, and the end of the piston rod away from the buffer is located outside the accommodating chamber. The coil assembly is arranged in the accommodating chamber, the coil assembly is sleeved on the piston rod and is fixedly connected to the piston rod. When the coil assembly is energized, the piston rod and the coil assembly can move relative to the damping module along the axial direction of the sleeve.
[0013] In some embodiments, the damping module further comprises a plurality of magnets which are sequentially arranged on the side of the accommodating cavity along the axial direction of the sleeve. The plurality of magnets are used to interact with the coil assembly so that the piston rod and the coil assembly move relative to the damping module along the axial direction of the sleeve.
[0014] In some embodiments, the linear motor further comprises a bearing seat, a first linear bearing and a second linear bearing. The sleeve is further provided with a second opening, the second opening being in communication with the accommodating cavity, and the second opening being opposite to the first opening along the axial direction of the sleeve. The bearing seat is fixed to the end of the sleeve provided with the second opening. The piston rod sequentially passes through the bearing seat and the second opening into the accommodating cavity. The first linear bearing is located in the gap between the bearing seat and the piston rod, the first linear bearing is mounted on the bearing seat, and the piston rod is slidably connected to the first linear bearing.
[0015] The piston rod is provided with a guide cavity, which is concavely arranged on the side of the piston rod facing the guide rod, and the guide rod extends into the guide cavity. The second linear bearing is arranged between the cavity side surface of the guide cavity and the outer peripheral surface of the guide rod.
[0016] By providing the first linear bearing and the second linear bearing, the piston rod can move more smoothly.
[0017] In some embodiments, the second linear bearing is fixed to the piston rod, and the guide rod is slidably connected to the second linear bearing. Lubricating oil is provided between the buffer and the guide rod. By providing the lubricating oil between the buffer and the guide rod, the piston rod and the second linear bearing move toward the buffer, the buffer is abutted and deformed, and the lubricating oil is squeezed between the second linear bearing and the guide rod. The lubricating oil lubricates the second linear bearing and the guide rod, so that the piston rod can move more smoothly.
[0018] In some embodiments, the linear motor further comprises a dust ring, which is mounted on the bearing seat, is located in the gap between the bearing seat and the piston rod, and is located on the side of the first linear bearing away from the second opening. The dust ring is used to close the gap between the bearing seat and the piston rod. By providing the dust ring, dust is prevented from entering the gap between the bearing seat and the piston rod and sticking to the first linear bearing, thereby preventing the piston rod from getting stuck during movement.
[0019] In some embodiments, the matching module further includes a temperature sensor, which is mounted on the coil assembly and is used to detect the temperature of the coil assembly.
[0020] The second aspect of the present application includes a shock absorber, including the linear motor provided by the first aspect of the present application.
[0021] The third aspect of the present application provides a suspension system, comprising a first mounting seat, a second mounting seat and the linear motor provided in the first aspect of the present application. The first mounting seat is fixed to one end of the mating module located outside the accommodating cavity, and the second mounting seat is connected to the end cover. The first mounting seat and the second mounting seat are used to install the linear motor on the vehicle.
[0022] In some embodiments, the suspension system further includes a first fixing seat and a spring. The first fixing seat is fixedly connected to the first fixing seat on the side facing the sleeve, and the sleeve is provided with a second fixing seat. Along the axial direction of the sleeve, the first fixing seat and the second fixing seat are spaced and opposite to each other. One end of the spring is installed on the first fixing seat, and the other end of the spring is installed on the second fixing seat. By providing the spring, the buffering performance of the suspension system is improved.
[0023] In some embodiments, a buffer pad is further included, the buffer pad is arranged between the spring and the second fixing seat, the buffer pad is fixed to the second fixing seat, and one end of the spring facing the buffer pad is fixed to the buffer pad. The buffer pad is used to buffer the spring to prevent the spring from rigidly colliding with the second fixing seat when compressed and causing abnormal noise.
[0024] In some embodiments, a first sensor and a controller are further included, and the first sensor and the linear motor are both electrically connected to the controller. The first sensor is used to detect road surface information and transmit the detected road surface information to the controller. The controller controls the matching module to move relative to the damping module along the axial direction of the sleeve according to the road surface information. By setting the first sensor and the controller, the suspension system can predict the road surface conditions and make active adjustments.
[0025] In some embodiments, a second sensor is further included, the second sensor is electrically connected to the controller, the second sensor is installed on the linear motor, and the second sensor is used to detect the displacement of the damping module or the displacement of the matching module, and transmit the detected displacement to the controller.
[0026] The fourth aspect of the present application provides a vehicle, comprising a vehicle body, a lower arm, and the suspension system provided in the third aspect of the present application, wherein the first mounting seat is connected to the vehicle body, and the second mounting seat is connected to the lower arm. Alternatively, the first mounting seat is connected to the lower arm, and the second mounting seat is connected to the vehicle body.
[0027] In the linear motor provided in the embodiment of the present application, the mating module can move relative to the damping module along the axial direction of the sleeve, the guide rod is used to guide the mating module, and the buffer is used to buffer the mating module. For example, the mating module moves toward the buffer, the mating module abuts the buffer, and the buffer buffers the mating module to prevent the mating module from rigidly colliding with the end cover, so as to avoid abnormal noise between the mating module and the end cover. In addition, since the buffer and the guide rod are both fixed to the end cover, before the mating module abuts the buffer, the buffer and the guide rod will not move relative to each other, and the buffer and the guide rod will not generate friction, so that no abnormal noise will occur between the buffer and the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation scheme are briefly introduced below.
[0029] Figure 1 It is a schematic diagram of the structure of the linear motor provided in an embodiment of the present application.
[0030] Figure 2 yes Figure 1 Schematic diagram of the structure of the damping module of the linear motor shown in.
[0031] Figure 3 yes Figure 1 Schematic diagram of the structure of the matching module of the linear motor shown in.
[0032] Figure 4 yes Figure 2 Enlarged view of point A in the middle.
[0033] Figure 5 yes Figure 1 Enlarged view of point B in the middle.
[0034] Figure 6 yes Figure 1 Enlarged view of point C in the middle.
[0035] Figure 7 It is a schematic diagram of the structure of the suspension system provided in an embodiment of the present application.
[0036] Figure 8 It is a partial structural schematic diagram of a suspension system provided in another embodiment of the present application.
[0037] Description of the accompanying drawings: 1-suspension system, 10-linear motor, 20-first mounting seat, 30-second mounting seat, 40-first fixed seat, 50-spring, 60-buffer pad, 70-second sensor, 71-magnetic scale, 72-sensor reader, 80-dust cover, 1000-damping module, 2000-matching module, 100-sleeve, 101-first opening, 102-accommodating cavity, 103-second opening, 104-second fixed seat, 200-end cover, 201-mounting surface, 202-clamping member, 203-first boss, 300-buffer, 301-second boss, 302-bending arc section, 303-support section, 304- Buffer cavity, 305-inclined guide surface, 306-through hole, 310-guide rod, 320-magnetic steel, 330-bearing seat, 331-mounting hole, 332-first mounting groove, 333-third mounting groove, 340-first linear bearing, 350-second linear bearing, 360-dust ring, 370-mounting bracket, 371-fourth mounting groove, 500-piston rod, 501-shoulder, 502-guide cavity, 503-second mounting groove, 504-wire cavity, 505-wire hole, 600-coil assembly, 601-iron core, 602-coil, 603-wire groove, 700-first end plate, 710-second end plate, 720-fixed block. DETAILED DESCRIPTION
[0038] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Figure 1 For the convenience of description, the axial direction of the sleeve 100 is defined as the X-axis direction. Figure 1 The description of the orientation shown uses the positive direction of the X-axis as “up” and the negative direction of the X-axis as “down”, which does not constitute a limitation on the damping module 1000, the linear motor 10 and the suspension system 1 in actual application scenarios.
[0039] Please refer to Figure 1 , Figure 2 and Figure 3 The linear motor 10 provided in the embodiment of the present application includes a damping module 1000 and a matching module 2000. The damping module 1000 includes a sleeve 100, an end cover 200, a buffer 300 and a guide rod 310. The sleeve 100 is provided with a housing cavity 102 with a first opening 101, and the sleeve 100 is a circular cylinder. In other embodiments, the sleeve 100 may also be a square cylinder. The sleeve 100 is formed by aluminum alloy die casting. In other embodiments, the sleeve 100 may also be formed by injection molding. The end cover 200 is fixed to the sleeve 100 to close the first opening 101. Exemplarily, the end cover 200 is fixed to the sleeve 100 by bolts or screws. The guide rod 310 and the buffer 300 are both arranged in the housing cavity 102. One end of the guide rod 310 is fixed to the end cover 200. The axial directions of the guide rod 310 and the sleeve 100 are the same. In this embodiment, the guide rod 310 is fixed to the end cover 200 by screws. In other embodiments, the guide rod 310 can also be welded and fixed to the end cover 200. The buffer 300 is sleeved on the guide rod 310 and fixedly connected to the end cover 200. The buffer 300 is made of a flexible material, such as rubber. The buffer 300 has a certain elasticity, so that the buffer 300 can play a buffering role.
[0040] At least part of the mating module 2000 is installed in the accommodating cavity 102. The mating module 2000 and the damping module 1000 can move relative to each other along the axial direction (X-axis direction) of the sleeve 100. The guide rod 310 is used to guide the mating module 2000, and the buffer 300 is used to buffer the mating module 2000. One of the mating module 2000 and the damping module 1000 is a stator, and the other is a mover. For example, the mating module 2000 serves as a mover, and the damping module 1000 serves as a stator. The mating module 2000 moves toward the buffer 300, and the mating module 2000 abuts against the buffer 300. The buffer 300 buffers the mating module 2000 to prevent the mating module 2000 from rigidly colliding with the end cover 200, so as to avoid damage to components and abnormal noise. Among them, the buffer component 300 and the guide rod 310 are both fixed to the end cover 200. Before the mating module 2000 abuts against the buffer component 300, the buffer component 300 and the guide rod 310 will not move relative to each other, and no friction will be generated between the buffer component 300 and the guide rod 310, so that no abnormal sound will occur between the buffer component 300 and the guide rod 310.
[0041] In addition, the linear motor 10 is used in a shock absorber. When the matching module 2000 abuts against the buffer member 300, the buffer member 300 can provide nonlinear damping, so that the shock absorber has a better shock absorbing effect.
[0042] In other embodiments, the matching module 2000 may also be used as a stator, and the damping module 1000 may be used as a mover. The damping module 1000 moves along the X-axis direction, and the matching module 2000 moves relative to the damping module 1000 along the X-axis direction.
[0043] In some embodiments, please refer to Figure 2 The end cover 200 includes a mounting surface 201, and the mounting surface 201 faces the accommodating cavity 102. The end cover 200 is provided with a clamping member 202, which is convexly arranged on the mounting surface 201 and is annular. The buffer member 300 is clamped to the clamping member 202 to be fixed to the end cover 200. The buffer member 300 is fixed to the end cover 200 by clamping, and the assembly of the buffer member 300 and the end cover 200 does not require the aid of other mounting members and mounting equipment, so the assembly is more convenient, thereby improving the assembly efficiency.
[0044] In some embodiments, please refer to Figure 4The clamping member 202 includes a first boss 203, which is convexly arranged on the side of the clamping member 202 facing the guide rod 310, and the first boss 203 is in a circular ring shape. Along the axial direction of the sleeve 100 (X-axis direction), the first boss 203 is spaced apart from the mounting surface 201. The buffer member 300 includes a second boss 301, which is convexly arranged on the side of the buffer member 300 facing the clamping member 202, and the second boss 301 is in a circular ring shape. When the buffer member 300 is clamped to the clamping member 202, the second boss 301 undergoes elastic deformation to fit into the interval between the first boss 203 and the mounting surface 201, and the second boss 301 abuts against the first boss 203, so that the buffer member 300 is fixed to the end cover 200. In this embodiment, the buffer member 300 is fixedly connected to the end cover 200 by setting the second boss 301 to abut against the first boss 203, and the structure is simple.
[0045] In some embodiments, please refer to Figure 4 The buffer 300 is provided with a through hole 306, which penetrates both sides of the buffer 300 along the X-axis direction, and the guide rod 310 passes through the through hole 306. It can be understood that the buffer 300 is sleeved on the guide rod 310. The buffer 300 includes a curved segment 302 and a supporting segment 303. Figure 4 The dotted line in is the boundary line between the curved segment 302 and the support segment 303. Along the axial direction (X-axis direction) of the sleeve 100, the curved segment 302 and the support segment 303 are connected, a portion of the through hole 306 is located in the curved segment 302, and the other portion is located in the support segment 303. The second boss 301 is disposed on the support segment 303, the support segment 303 is fixed to the end cover 200, and the curved segment 302 is located on the side of the support segment 303 away from the end cover 200. In this embodiment, the curved segment 302 and the support segment 303 are integrally processed and formed.
[0046] The two ends of the curved segment 302 along the axial direction (X-axis direction) of the sleeve 100 are bent toward the guide rod 310, and the curved segment 302 and the guide rod 310 enclose a buffer cavity 304. When the matching module 2000 abuts against the buffer member 300, the matching module 2000 first abuts against the end of the curved segment 302 facing the positive direction of the X-axis, and the end of the curved segment 302 facing the positive direction of the X-axis is elastically deformed toward the buffer cavity 304.
[0047] In this embodiment, by setting up the buffer cavity 304, the curved segment 302 has space for deformation, and the curved segment 302 is more likely to undergo elastic deformation, so that the buffer component 300 has better buffering performance. The buffer component 300 can better buffer the matching module 2000, thereby increasing the service life of the linear motor 10.
[0048] In some embodiments, please refer to Figure 4, along the direction from the end cap 200 to the buffer 300 (the positive direction of the X axis), the difference between the outer diameter and the inner diameter of the curved segment 302 gradually decreases. Specifically, the difference between the outer diameter and the inner diameter of the curved segment 302 can decrease linearly and uniformly, or can decrease unevenly.
[0049] It can be understood that the thickness of the curved segment 302 gradually decreases along the positive direction of the X-axis, and the thickness of the end of the curved segment 302 facing the positive direction of the X-axis is the smallest. The smaller the thickness of the curved segment 302, the easier it is for the curved segment 302 to undergo elastic deformation. When the matching module 2000 abuts against the buffer 300, the matching module 2000 abuts against the end of the curved segment 302 with the smallest thickness, so the curved segment 302 is more likely to undergo elastic deformation, and the buffer 300 has better buffering performance for the matching module 2000. In addition, the thickness of the curved segment 302 gradually decreases, the curved segment 302 can undergo elastic deformation uniformly, and the buffer 300 has better buffering performance.
[0050] In some embodiments, please refer to Figure 4 , an inclined guide surface 305 is provided on the side of the support section 303 facing the end cover 200. When the buffer 300 is sleeved on the guide rod 310, the end of the guide rod 310 abuts against the inclined guide surface 305 and slides into the through hole 306, and finally the buffer 300 is sleeved into the end of the guide rod 310 close to the end cover 200 and fixed to the end cover 200. By providing the inclined guide surface 305, the buffer 300 can be more easily sleeved on the guide rod 310, thereby improving the assembly efficiency.
[0051] In some embodiments, please refer to Figure 1 and Figure 3 , the matching module 2000 includes a piston rod 500 and a coil assembly 600. One end of the piston rod 500 extends into the accommodating chamber 102, the piston rod 500 is sleeved on the guide rod 310, the piston rod 500 is located on the side of the buffer 300 away from the end cover 200, and the end of the piston rod 500 away from the buffer 300 is located outside the accommodating chamber 102. The coil assembly 600 is arranged in the accommodating chamber 102, the coil assembly 600 is sleeved on the piston rod 500 and is fixedly connected to the piston rod 500. When the coil assembly 600 is energized, the piston rod 500 and the coil assembly 600 can move relative to the damping module 1000 along the axial direction of the sleeve 100.
[0052] In some embodiments, please refer to Figure 1 and Figure 2 The damping module 1000 further includes a plurality of magnetic steels 320, which are sequentially arranged on the side surface of the accommodating cavity 102 along the axial direction (X-axis direction) of the sleeve 100. The plurality of magnetic steels 320 are used to interact with the coil assembly 600, so that the piston rod 500 and the coil assembly 600 move relative to the damping module 1000 along the axial direction (X-axis direction) of the sleeve 100.
[0053] Specifically, the magnetic steel 320 is annular. A plurality of magnetic steels 320 are sequentially arranged on the cavity side of the accommodating cavity 102 along the X-axis direction. Exemplarily, the plurality of magnetic steels 320 are fixed to the cavity side of the accommodating cavity 102 by gluing. Adjacent magnetic steels 320 are arranged in close contact, and the magnetic poles of adjacent magnetic steels 320 are opposite, and the plurality of magnetic steels 320 are used to generate a magnetic field.
[0054] Please refer to Figure 1 , Figure 3 and Figure 5 , the coil assembly 600 includes an iron core 601 and a plurality of coils 602. The iron core 601 is provided with a plurality of wire slots 603, and the plurality of wire slots 603 are arranged at intervals along the X-axis direction. In this embodiment, the iron core 601 is formed by stacking a plurality of silicon steel sheets of different diameters. The matching module 2000 also includes a shoulder 501, a first end plate 700, a second end plate 710 and a fixing block 720. The shoulder 501 is sleeved on the piston rod 500 and fixed to the outer peripheral surface of the piston rod 500. In other embodiments, the shoulder 501 can be integrally processed and formed with the piston rod 500. The first end plate 700 is sleeved on the piston rod 500 and abuts against the shaft shoulder 501, the iron core 601 is sleeved on the piston rod 500 and abuts against the first end plate 700, that is, a plurality of silicon steel sheets are sleeved on the piston rod 500, one of the silicon steel sheets abuts against the side of the first end plate 700 away from the shaft shoulder 501, and the second end plate 710 is sleeved on the piston rod 500 and abuts against the side of the iron core 601 away from the first end plate 700. The fixing block 720 is fixed to the piston rod 500, and the fixing block 720 abuts against the side of the second end plate 710 away from the iron core 601.
[0055] It can be understood that the fixing block 720 and the shaft shoulder 501 press the first end plate 700 , the second end plate 710 and the iron core 601 to fix the first end plate 700 , the second end plate 710 and the iron core 601 to the piston rod 500 .
[0056] Multiple coils 602 are wound in multiple wire slots 603 in a one-to-one correspondence. Multiple coils 602 constitute multiple groups of three-phase coils, and each group of three-phase coils includes three coils 602. Multiple groups of three-phase coils are arranged in sequence along the X-axis direction. Multiple three-phase coils are connected in series or in parallel, and one of the three-phase coils is connected to the three-phase current so that each group of three-phase coils is connected to the three-phase current. Among them, the phase sequence of the three-phase current is U, V, W. In other embodiments, the phase sequence of the three-phase current can also be U, W, V.
[0057] After each set of three-phase coils is connected to the three-phase current, the current flowing through each coil 602 cuts the magnetic flux lines of the magnetic field generated by the multiple magnetic steels 320. According to the Lorentz force law, the multiple coils 602 are all subjected to the magnetic force along the X-axis direction, so that the multiple coils 602 can move along the X-axis direction.
[0058] In some embodiments, please refer to Figure 1 , Figure 5 and Figure 6 , the linear motor 10 also includes a bearing seat 330, a first linear bearing 340 and a second linear bearing 350. The sleeve 100 is also provided with a second opening 103, and the second opening 103 is communicated with the accommodating chamber 102. Along the axial direction (X-axis direction) of the sleeve 100, the second opening 103 is opposite to the first opening 101. The bearing seat 330 is fixed to the end of the sleeve 100 where the second opening 103 is provided. The piston rod 500 passes through the bearing seat 330 and the second opening 103 in sequence to enter the accommodating chamber 102. The first linear bearing 340 is located in the gap between the bearing seat 330 and the piston rod 500, and the first linear bearing 340 is installed on the bearing seat 330, and the piston rod 500 is slidably connected to the first linear bearing 340.
[0059] Specifically, the bearing seat 330 is provided with a mounting hole 331, which passes through the opposite sides of the bearing seat 330 along the X-axis direction, and the mounting hole 331 is opposite to the second opening 103. The piston rod 500 passes through the mounting hole 331 and the second opening 103 in sequence to enter the accommodating chamber 102, and a gap is retained between the piston rod 500 and the hole wall surface of the mounting hole 331. The hole wall surface of the mounting hole 331 is concavely provided with a first mounting groove 332, and the first linear bearing 340 is installed in the first mounting groove 332. The piston rod 500 passes through the first linear bearing 340, and the outer peripheral surface of the piston rod 500 abuts against the ball of the first linear bearing 340, that is, the piston rod 500 is slidably connected with the first linear bearing 340.
[0060] The piston rod 500 is provided with a guide cavity 502, and the guide cavity 502 is recessed on the side of the piston rod 500 facing the guide rod 310, and the guide rod 310 extends into the guide cavity 502. The second linear bearing 350 is arranged between the cavity side surface of the guide cavity 502 and the outer peripheral surface of the guide rod 310. In this embodiment, the cavity side surface of the guide cavity 502 is recessed with a second mounting groove 503, and the second linear bearing 350 is fixed to the second mounting groove 503. It can be understood that the second linear bearing 350 is fixed to the piston rod 500. When the guide rod 310 penetrates the guide cavity 502, it passes through the second linear bearing 350, and the ball of the second linear bearing 350 is exposed relative to its inner peripheral surface and abuts against the outer peripheral surface of the piston rod 500. It can be understood that the guide rod 310 is slidably connected with the second linear bearing 350. In other embodiments, the second linear bearing 350 is sleeved on the guide rod 310 and fixed to the guide rod 310, and the ball of the second linear bearing 350 is exposed relative to its outer peripheral surface and abuts against the cavity side of the guide cavity 502, that is, the piston rod 500 is slidably connected to the second linear bearing 350.
[0061] In this embodiment, the first linear bearing 340 and the second linear bearing 350 are provided so that the piston rod 500 can move more smoothly.
[0062] In some embodiments, lubricating oil is provided between the buffer 300 and the guide rod 310. By providing the lubricating oil between the buffer 300 and the guide rod 310, when the piston rod 500 and the second linear bearing 350 move toward the buffer 300, the buffer 300 is abutted and deformed, and the lubricating oil is squeezed between the second linear bearing 350 and the guide rod 310, and the lubricating oil lubricates the second linear bearing 350 and the guide rod 310, so that the piston rod 500 can move more smoothly.
[0063] In some embodiments, please refer to Figure 6 The linear motor 10 further includes a dust ring 360, which is mounted on the bearing seat 330, and is located in the gap between the bearing seat 330 and the piston rod 500, and the dust ring 360 is located on the side of the first linear bearing 340 away from the second opening 103. The dust ring 360 is used to close the gap between the bearing seat 330 and the piston rod 500.
[0064] Specifically, the hole wall surface of the mounting hole 331 is further concavely provided with a third mounting groove 333, and the third mounting groove 333 is located on the side of the first linear bearing 340 away from the second opening 103. The damping module 1000 also includes a mounting bracket 370, which is mounted on the third mounting groove 333, and the mounting bracket 370 abuts against the groove wall surface of the third mounting groove 333. The mounting bracket 370 is provided with a fourth mounting groove 371, and the dust ring 360 is mounted on the fourth mounting groove 371, and the dust ring 360 abuts against the groove wall surface of the fourth mounting groove 371 and the outer peripheral surface of the piston rod 500 to close the gap between the piston rod 500 and the bearing seat 330. In this embodiment, by providing the dust ring 360, dust is prevented from entering the gap between the bearing seat 330 and the piston rod 500, and the piston rod 500 is prevented from getting stuck during the movement process.
[0065] In some embodiments, the matching module 2000 further includes a temperature sensor, which is installed on the coil assembly 600 and is used to detect the temperature of the coil assembly 600. By setting the temperature sensor, the user can monitor the temperature of the coil assembly 600 to prevent the temperature of the coil assembly 600 from being too high and affecting the performance and life of the linear motor 10.
[0066] The embodiment of the present application also provides a shock absorber, including the linear motor 10 provided in the embodiment of the present application. The linear motor 10 produces shock absorption by adjusting the relative movement between the damping module 1000 and the matching module 2000. At the same time, when the buffer 300 is abutted and elastically deformed, the buffer 300 can also provide nonlinear damping, so that the shock absorption effect of the shock absorber is better.
[0067] Please refer to Figure 7The embodiment of the present application also provides a suspension system 1, comprising a first mounting seat 20, a second mounting seat 30 and a linear motor 10 provided in the embodiment of the present application. The first mounting seat 20 is fixed to one end of the mating module 2000 located outside the accommodating cavity 102. Specifically, the first mounting seat 20 is fixed to one end of the piston rod 500 located outside the accommodating cavity 102. Exemplarily, the first mounting seat 20 is sleeved on the piston rod 500, and then the first mounting seat 20 is locked to the piston rod 500 using a nut. The second mounting seat 30 is connected to the end cover 200. In this embodiment, the second mounting seat 30 and the end cover 200 are integrally processed and formed. In other embodiments, the second mounting seat 30 can also be welded and fixed to the end cover 200.
[0068] The first mounting seat 20 and the second mounting seat 30 are used to mount the linear motor 10 on the vehicle. Specifically, the first mounting seat 20 is connected to the vehicle body, and the second mounting seat 30 is connected to the lower arm. Alternatively, the first mounting seat 20 is connected to the lower arm, and the second mounting seat 30 is connected to the vehicle body. When the vehicle is traveling on a bumpy road, the linear motor 10 works, and the matching module 2000 moves up and down relative to the damping module 1000 to achieve shock absorption, so that the vehicle can maintain balance.
[0069] In some embodiments, please refer to Figure 7 The suspension system 1 also includes a first fixed seat 40 and a spring 50. The first fixed seat 40 is made of rubber, and is fixedly connected to the side of the first mounting seat 20 facing the sleeve 100. Exemplarily, the first fixed seat 40 is sleeved on the piston rod 500 and glued to the first mounting seat 20. The sleeve 100 is provided with a second fixed seat 104. Along the axial direction (X-axis direction) of the sleeve 100, the first fixed seat 40 and the second fixed seat 104 are spaced apart from each other. One end of the spring 50 is installed on the first fixed seat 40, and the other end of the spring 50 is installed on the second fixed seat 104. By providing the spring 50, the buffering performance of the suspension system 1 is improved.
[0070] In some embodiments, please refer to Figure 7 The suspension system 1 further includes a buffer pad 60, which is disposed between the spring 50 and the second fixing seat 104. The buffer pad 60 is fixed to the second fixing seat 104, and one end of the spring 50 facing the buffer pad 60 is fixed to the buffer pad 60. It can be understood that the spring 50 is mounted on the second fixing seat 104 through the buffer pad 60. The buffer pad 60 is used to buffer the spring 50, so as to prevent the spring 50 from rigidly colliding with the second fixing seat 104 and causing abnormal noise when the spring 50 is compressed.
[0071] In some embodiments, the suspension system 1 further includes a first sensor and a controller, both of which are mounted on the vehicle body. The first sensor and the linear motor 10 are both electrically connected to the controller. The first sensor is used to detect road surface information and transmit the detected road surface information to the controller. The controller controls the matching module 2000 to move relative to the damping module 1000 along the axial direction (X-axis direction) of the sleeve 100 according to the road surface information. By setting the first sensor and the controller, the suspension system 1 can predict the road surface conditions and make active adjustments, thereby making the shock absorption performance of the suspension system 1 better.
[0072] In some embodiments, please refer to Figure 8 The suspension system 1 further includes a second sensor 70, which is electrically connected to the controller. The second sensor 70 is mounted on the linear motor 10, and is used to detect the displacement of the damping module 1000 or the displacement of the matching module 2000, and transmit the detected displacement to the controller.
[0073] Specifically, the second sensor 70 is an absolute value sensor, and the second sensor 70 includes a magnetic scale 71 and a sensor reader 72. When the matching module 2000 is a mover and the damping module 1000 is a stator, the magnetic scale 71 is installed on the piston rod 500, the magnetic scale 71 moves with the matching module 2000, the sensor reader 72 is installed on the bearing seat 330, and the sensor reader 72 remains stationary. The sensor reader 72 cooperates with the magnetic scale 71 to detect the displacement of the matching module 2000, and transmits the detected displacement to the controller. Alternatively, when the damping module 1000 is a mover and the matching module 2000 is a stator, the magnetic scale 71 is installed on the bearing seat 330, the magnetic scale 71 moves with the damping module 1000, the sensor reader 72 is installed on the piston rod 500, and the sensor reader 72 remains stationary. The sensor reader 72 cooperates with the magnetic scale 71 to detect the displacement of the damping module 1000, and transmits the detected displacement to the controller. The controller then determines the motion state of the linear motor 10 according to the received displacement.
[0074] In some embodiments, please refer to Figure 7 The piston rod 500 is also provided with a wire-passing cavity 504. Along the X-axis direction, the wire-passing cavity 504 penetrates the bottom surface of the guide cavity 502 and the side of the piston rod 500 away from the guide cavity 502. Figure 7The dotted line perpendicular to the X-axis in the figure is the boundary between the wire cavity 504 and the guide cavity 502. The piston rod 500 is also provided with a wire hole 505, which connects the wire cavity 504 with the accommodating cavity 102. The wire harness of the coil assembly 600 passes through the wire cavity 504 from the wire hole 505 and passes from the wire cavity 504 to the outside. By providing the wire cavity 504 and the wire hole 505, the wire harness can be led out from the center of the piston rod 500 to the outside, saving space. In addition, the wire harness only passes through the wire cavity 504 and will not enter the guide cavity 502, thereby preventing the wire harness from affecting the movement of the mating module 2000.
[0075] In some embodiments, please refer to Figure 7 The suspension system 1 further includes a dust cover 80, which is sleeved on the bearing seat 330 and is located on the inner side of the spring 50. One end of the dust cover 80 is fixed to the first fixing seat 40, and the other end of the dust cover 80 is fixed to the end of the sleeve 100. The dust cover 80 is used to shield the bearing seat 330 and the piston rod 500, to prevent dust from sticking to the piston rod 500 and dust from entering the accommodating cavity 102 from the mounting hole 331 and the second opening 103.
[0076] The embodiment of the present application also provides a vehicle, including a vehicle body, a lower arm and a suspension system 1 provided in the embodiment of the present application, wherein the first mounting seat 20 is connected to the vehicle body, and the second mounting seat 30 is connected to the lower arm. Alternatively, the first mounting seat 20 is connected to the lower arm, and the second mounting seat 30 is connected to the vehicle body. When the vehicle is traveling on a bumpy road section, the linear motor 10 works, and the matching module 2000 moves up and down relative to the damping module 1000 to achieve shock absorption, so that the vehicle remains balanced. In addition, the spring 50 in the suspension system 1 can also provide damping, so that the shock absorption effect of the suspension system 1 is better, and the vehicle can travel on a bumpy road section more stably.
[0077] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea.
Claims
1. A linear motor, characterized in that: It comprises a matching module and a damping module; the damping module comprises a sleeve, an end cover, a buffer and a guide rod, and the sleeve is provided with a receiving cavity with a first opening; The end cover is fixed to the sleeve to close the first opening; the guide rod and the buffer are both arranged in the accommodating cavity, one end of the guide rod is fixed to the end cover, and the axial directions of the guide rod and the sleeve are the same; the buffer is sleeved on the guide rod and fixedly connected to the end cover; The mating module is at least partially installed in the accommodating cavity, the mating module and the damping module can move relative to each other along the axial direction of the sleeve, the guide rod is used to guide the mating module, and the buffer member is used to buffer the mating module; one of the mating module and the damping module is a stator, and the other is a mover.
2. The linear motor according to claim 1, characterized in that: The end cover comprises a mounting surface, the mounting surface faces the accommodating cavity; the end cover is provided with a clamping piece, the clamping piece is protruded from the mounting surface, and the buffer piece is clamped to the clamping piece.
3. The linear motor according to claim 2, characterized in that: The clamping member comprises a first boss, which is convexly arranged on a side of the clamping member facing the guide rod; along the axial direction of the sleeve, the first boss is spaced apart from the mounting surface; The buffer member includes a second boss, which is protruding from the side of the buffer member facing the clamping member; when the buffer member is clamped to the clamping member, the second boss is clamped into the gap between the first boss and the mounting surface, so that the buffer member is fixed to the end cover.
4. The linear motor according to claim 1, characterized in that: The buffer comprises a curved segment and a supporting segment; along the axial direction of the sleeve, the curved segment and the supporting segment are connected, the supporting segment is fixed to the end cover, and the curved segment is located on a side of the supporting segment away from the end cover; Both ends of the curved segment along the axial direction of the sleeve are bent toward the guide rod, and the curved segment and the guide rod enclose a buffer cavity.
5. The linear motor according to claim 4, characterized in that: Along the direction from the end cover to the buffer, the difference between the outer diameter and the inner diameter of the curved segment gradually decreases.
6. The linear motor according to claim 5, characterized in that: The support section is provided with an inclined guide surface on one side facing the end cover.
7. The linear motor according to any one of claims 1 to 6, characterized in that: The matching module is a mover, and the damping module is a stator; the matching module includes a piston rod and a coil assembly; one end of the piston rod extends into the accommodating cavity, the piston rod is sleeved on the guide rod, the piston rod is located on the side of the buffer away from the end cover, and the end of the piston rod away from the buffer is located outside the accommodating cavity; The coil assembly is disposed in the accommodating cavity, and the coil assembly is sleeved on the piston rod and fixedly connected to the piston rod; when the coil assembly is energized, the piston rod and the coil assembly can move relative to the damping module along the axial direction of the sleeve.
8. The linear motor according to claim 7, characterized in that: The damping module also includes a plurality of magnets, which are arranged in sequence on the side surface of the accommodating cavity along the axial direction of the sleeve; the plurality of magnets are used to interact with the coil assembly so that the piston rod and the coil assembly move relative to the damping module along the axial direction of the sleeve.
9. The linear motor according to claim 7, characterized in that: It also includes a bearing seat, a first linear bearing and a second linear bearing; the sleeve is further provided with a second opening, the second opening is communicated with the accommodating cavity, and along the axial direction of the sleeve, the second opening is opposite to the first opening; The bearing seat is fixed to the end of the sleeve provided with the second opening; the piston rod passes through the bearing seat and the second opening in sequence and enters the accommodating cavity; the first linear bearing is located in the gap between the bearing seat and the piston rod, the first linear bearing is installed on the bearing seat, and the piston rod is slidably connected to the first linear bearing; The piston rod is provided with a guide cavity, which is recessed on the side of the piston rod facing the guide rod, and the guide rod extends into the guide cavity; the second linear bearing is arranged between the cavity side surface of the guide cavity and the outer peripheral surface of the guide rod.
10. The linear motor according to claim 9, characterized in that: The second linear bearing is fixed to the piston rod, and the guide rod is slidably connected to the second linear bearing; and lubricating oil is provided between the buffer and the guide rod.
11. The linear motor according to claim 9, characterized in that: It also includes a dust ring, which is installed on the bearing seat, located in the gap between the bearing seat and the piston rod, and located on the side of the first linear bearing away from the second opening; the dust ring is used to close the gap between the bearing seat and the piston rod.
12. The linear motor according to claim 7, characterized in that: The matching module further includes a temperature sensor, which is installed on the coil assembly and is used to detect the temperature of the coil assembly.
13. A shock absorber, characterized in that: A linear motor comprising the linear motor described in any one of claims 1 to 12.
14. A suspension system, characterized in that: It includes a first mounting seat, a second mounting seat and a linear motor according to any one of claims 1 to 12; the first mounting seat is fixed to one end of the matching module located outside the accommodating cavity, and the second mounting seat is connected to the end cover; the first mounting seat and the second mounting seat are used to install the linear motor on a vehicle.
15. The suspension system according to claim 14, characterized in that It also includes a first fixing seat and a spring; the first fixing seat is fixedly connected to the side of the first mounting seat facing the sleeve, and the sleeve is provided with a second fixing seat; along the axial direction of the sleeve, the first fixing seat and the second fixing seat are spaced apart and opposite to each other; one end of the spring is installed on the first fixing seat, and the other end of the spring is installed on the second fixing seat.
16. The suspension system according to claim 15, characterized in that It also includes a buffer pad, which is arranged between the spring and the second fixing seat, the buffer pad is fixed to the second fixing seat, and one end of the spring facing the buffer pad is fixed to the buffer pad.
17. The suspension system according to claim 14, characterized in that It also includes a first sensor and a controller, wherein the first sensor and the linear motor are electrically connected to the controller; the first sensor is used to detect road surface information and transmit the detected road surface information to the controller; the controller controls the matching module to move relative to the damping module along the axial direction of the sleeve according to the road surface information.
18. The suspension system according to claim 17, characterized in that It also includes a second sensor, which is electrically connected to the controller; the second sensor is installed on the linear motor, and the second sensor is used to detect the displacement of the damping module or the displacement of the matching module, and transmit the detected displacement to the controller.
19. A vehicle, characterized in that: The invention comprises a vehicle body, a lower swing arm and the suspension system according to any one of claims 14 to 18, wherein the first mounting seat is connected to the vehicle body and the second mounting seat is connected to the lower swing arm; or the first mounting seat is connected to the lower swing arm and the second mounting seat is connected to the vehicle body.