Linear motor, suspension and vehicle

Abstract

The embodiment of the utility model provides a linear motor, a suspension and a vehicle. The linear motor comprises a shell, a center guide shaft, a position indicating unit and a position sensing unit, the center guide shaft is arranged in the shell and can axially move relative to the shell, the position indicating unit is arranged on the center guide shaft, and the position sensing unit is arranged on the shell and penetrates through the shell. The position sensing unit does not occupy the axial arrangement space of the linear motor any more, the overall structure is simple and small, stability and reliability are higher, and the use efficiency of the linear motor is effectively improved by arranging the position indicating unit on the center guide shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and more specifically, to a linear motor, a suspension and a vehicle. Background Art

[0002] A linear motor, also known as a linear motor, is a transmission device that converts electrical energy directly into linear motion mechanical energy without the need for any intermediate mechanism.

[0003] At present, in order to realize the parametric control of the motion of the linear motor, the stroke of the linear motor is measured, which is generally achieved by setting a sensor on the motion axis of the linear motor. However, this method directly arranges the sensor on the motion axis, which occupies the axial arrangement space of the linear motor, and the sensor moves axially with the motion axis, which is not conducive to the arrangement of the sensor harness. The overall structure is complex, the efficiency is low, and the reliability is poor.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0005] One purpose of the utility model is to provide a new technical solution for a linear motor.

[0006] According to a first aspect of the present utility model, a linear motor is provided, wherein the linear motor comprises:

[0007] case;

[0008] A central guide shaft, the central guide shaft is disposed in the housing and is capable of axial movement relative to the housing;

[0009] A position indicating unit, wherein the position indicating unit is arranged on the central guide shaft;

[0010] The position sensing unit is disposed on the shell and passes through the shell.

[0011] Optionally, there is a gap between the position indicating unit and the position sensing unit.

[0012] Optionally, the position sensing unit is a photoelectric position sensing unit or an electromagnetic position sensing unit.

[0013] Optionally, the position sensing unit is an electromagnetic position sensing unit, and the position indicating unit is a rack.

[0014] Optionally, it further comprises a magnetic induction device mounting seat, wherein the magnetic induction device mounting seat is arranged on the shell, the electromagnetic position sensing unit is mounted on the magnetic induction device mounting seat, and there is a gap between the electromagnetic position sensing unit and the rack.

[0015] Optionally, the rack is provided with a calibration position tooth, the depth of the calibration position tooth being different from the depth of other teeth of the rack.

[0016] Optionally, the rack and the central guide shaft are an integral component, or the rack is fixedly connected to the central guide shaft.

[0017] Optionally, the magnetic sensing device mounting seat includes a clamping member and a fastener, the clamping member is used to clamp the electromagnetic position sensing unit, and the fastener is used to fasten the electromagnetic position sensing unit.

[0018] Optionally, the shell includes an upper shell and a lower shell, the upper shell is provided with an upper shell connecting block, the lower shell is provided with a lower shell connecting block, and the upper shell connecting block is detachably connected to the lower shell connecting block.

[0019] Optionally, it further includes a stator and a mover, the shell includes an upper shell and a lower shell, the stator is fixed in the lower shell, the mover is fixed on the central guide shaft, and the position indicating unit is arranged on the mover.

[0020] Optionally, the linear motor is a cylinder-type linear motor or a plate-type linear motor.

[0021] Optionally, the plate-type linear motor includes at least two stator coil mounting plates, and the position indicating unit is disposed between the two stator coil mounting plates.

[0022] Optionally, it further comprises an upper mounting ear, a lower mounting ear and a spring, wherein the spring is installed between the upper mounting ear and the shell.

[0023] Optionally, it also includes a lower guide shaft, which is located inside the shell, one end of the central guide shaft is fixedly connected to the upper mounting ear, and the other end of the central guide shaft is slidably connected to the lower guide shaft.

[0024] According to a second aspect of the present invention, a suspension is provided, comprising a control system and a linear motor as described in any one of the first aspects.

[0025] According to a third aspect of the present invention, a vehicle is provided, comprising a linear motor as described in any one of the first aspects, or comprising a suspension as described in the second aspect.

[0026] According to one embodiment of the utility model, by arranging the position sensing unit on the shell, the position sensing unit no longer occupies the axial arrangement space of the linear motor, and the overall structure is simple and compact, and it does not need to move with the center guide shaft, which is beneficial to the wiring harness arrangement of the position sensing unit, and has high stability and reliability. At the same time, the position indication unit is arranged on the center guide shaft, so that the position sensing unit can detect the position indication unit in real time, thereby completing the real-time sensing and recording of the current stroke of the linear motor, facilitating the parametric control of the movement of the linear motor, and real-time grasping and adjusting the movement position and stroke of the linear motor to cooperate with the realization of various expansion functions of the linear motor, effectively improving the use efficiency of the linear motor.

[0027] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0029] Figure 1 It is a structural schematic diagram of a cylindrical linear motor in one embodiment of the utility model.

[0030] Figure 2 It is a partial enlarged view of a cylindrical linear motor in one embodiment of the utility model.

[0031] Figure 3 It is a structural schematic diagram of a cylindrical linear motor in another embodiment of the utility model.

[0032] Figure 4 It is a structural schematic diagram of a plate-type linear motor in one embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 1. Upper mounting ear; 2. Spring; 3. Upper shell; 4. Center guide shaft; 5. Fastening bolts; 6. Lower shell; 7. Stator; 8. Lower guide shaft; 9. Lower mounting ear; 10. Mover; 11. Rack; 111. Calibration position tooth; 12. Lower shell connecting block; 13. Upper shell connecting block; 14. Electromagnetic position sensing unit; 141. Probe; 15. Fastening bolts; 16. Magnetic induction device mounting seat; 17. Rack; 18. Electromagnetic position sensing unit; 19. Fastening bolts; 20. Magnetic induction device mounting seat; 21. Rack; 22. Stator coil; 23. Stator coil mounting plate. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] The technical solutions disclosed in various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0041] First, refer to Figures 1 to 4 , an embodiment of the present application provides a linear motor, including a housing, a center guide shaft 4, a position indicating unit and a position sensing unit. The center guide shaft 4 is disposed in the housing and can move axially relative to the housing. The position indicating unit is disposed on the center guide shaft 4. The position sensing unit is disposed on the housing and passes through the housing. The position indicating unit is used to indicate the specific position of the center guide shaft 4 relative to the housing and can be detected by the position sensing unit. The position sensing unit and the position indicating unit can adopt a combination of a detection member and a detected member in a common position detection device, so they are not described in detail herein.

[0042] Among them, in this embodiment, the position sensing unit is arranged on the shell, so that the position sensing unit no longer occupies the axial arrangement space of the linear motor. The overall structure is simple and compact, and it does not need to move with the center guide shaft 4, which is beneficial to the wiring harness arrangement of the position sensing unit, and has higher stability and reliability.

[0043] In addition, the position indication unit is arranged on the central guide shaft, so that the position sensing unit can detect the position indication unit in real time, complete the real-time sensing and recording of the current stroke of the linear motor, facilitate the parametric control of the movement of the linear motor, grasp and adjust the movement position and stroke of the linear motor in real time, and can also cooperate to realize various expansion functions of the linear motor, effectively improving the use efficiency of the linear motor.

[0044] Optionally, there is a gap between the position indicating unit and the position sensing unit so that the position sensing unit can better detect the position indicating unit, and the gap between the two also effectively avoids mutual wear between the position indicating unit and the position sensing unit, thereby extending the service life.

[0045] Optionally, the position sensing unit is a photoelectric position sensing unit, the position indicating unit is a grating, the grating and the central guide shaft 4 are an integral component, or the grating is fixedly connected to the central guide shaft 4. The photoelectric position sensing unit includes a scanning head, which can scan the grating in real time to complete the real-time sensing and recording of the next stroke of the linear motor.

[0046] Alternatively, if Figure 1 or Figure 2 As shown, the position sensing unit is an electromagnetic position sensing unit 14 , and the position indicating unit is a rack 11 .

[0047] In this embodiment, when the linear motor reciprocates linearly, the central guide shaft 4 can drive the rack 11 to move, and cut the signal sent by the electromagnetic position sensor unit 14 to generate magnetic field and current changes. At the same time, the electromagnetic position sensor unit 14 can process the signal to identify the current position and movement direction of the rack 11, and feed it back to the control device of the linear motor, so as to realize the parameterized controllable motion stroke function of the linear motor.

[0048] Therefore, this embodiment measures the stroke of the linear motor through the electromagnetic principle, that is, it is detected through the rack cutting magnetic field method, and the overall response speed is faster, the accuracy is higher, and the reliability is stronger.

[0049] Alternatively, if Figure 1 or Figure 2 As shown, the linear motor further includes a magnetic induction device mounting seat 16 , which is disposed on the housing. The electromagnetic position sensing unit 14 is mounted on the magnetic induction device mounting seat 16 , and there is a gap between the electromagnetic position sensing unit 14 and the rack 11 .

[0050] In this embodiment, the electromagnetic position sensor unit 14 is installed through the magnetic sensing device mounting seat 16, so that the electromagnetic position sensor unit 14 can be disassembled and repaired more conveniently when a failure or damage occurs.

[0051] In addition, compared with the prior art that uses mechanical contact detection to easily cause wear and consumption, this embodiment adopts the principle of non-contact electromagnetic induction, that is, there is a gap between the electromagnetic position sensing unit 14 and the rack 11, so that there is no contact wear and consumption between the electromagnetic position sensing unit 14 and the rack 11, and the service life is longer.

[0052] Alternatively, if Figure 2 As shown, the electromagnetic position sensing unit 14 includes a probe 141, and the shell is made of steel or other metal or non-metal material, preferably with the ability to shield the magnetic field. The probe 141 passes through the shell and is inside the shell, which effectively improves the anti-interference ability and measurement accuracy of the probe 141, and enables the probe 141 to detect at a close distance from the rack 11.

[0053] Alternatively, if Figure 2 As shown, the rack 11 is provided with a calibration position tooth 111, and the depth of the calibration position tooth 111 is different from the depth of other teeth of the rack.

[0054] Specifically, the calibration position tooth 111 is designed to be near the zero position of the linear motor, so that when the linear motor is performing linear reciprocating motion, that is, the linear motor is within a cycle of power-on operation, the electromagnetic position sensing unit 14 can identify the current position of the linear motor by scanning the calibration position tooth 111, and implement subsequent real-time position sensing, thereby better realizing the detection of the linear motor and facilitating the expansion of the function of the linear motor.

[0055] Optionally, the rack 11 and the central guide shaft 4 are an integral component, or the rack 11 is fixedly connected to the central guide shaft 4 to simplify the matching relationship between the rack 11 and the central guide shaft 4 and improve assembly efficiency.

[0056] Alternatively, if Figure 2 As shown, the magnetic sensing device mounting seat 16 includes a clamping member and a fastener, the clamping member is used to clamp the electromagnetic position sensing unit 14 , and the fastener is used to fasten the electromagnetic position sensing unit 14 .

[0057] Specifically, the present embodiment facilitates the assembly of the electromagnetic position sensor unit 14 through the provision of the clamping parts and the fasteners, which is conducive to reuse. On the other hand, it is also convenient to replace and repair the electromagnetic position sensor unit 14 when it is damaged, thereby reducing the use cost of the linear motor.

[0058] Among them, the fastener described in this embodiment is a fastening bolt 15. Of course, the fastener can also be other fasteners such as screws and rivets, and this application does not make specific restrictions here.

[0059] Alternatively, if Figure 1 As shown, the shell includes an upper shell 3 and a lower shell 6, the upper shell 3 is provided with an upper shell connecting block 13, and the lower shell 6 is provided with a lower shell connecting block 12, and the upper shell connecting block 13 is detachably connected to the lower shell connecting block 12.

[0060] In this embodiment, the shell is divided into two parts, an upper part and an lower part, so that the overall structure of the linear motor is divided into blocks, which is convenient for the production and assembly of the linear motor.

[0061] It should be noted that, in this embodiment, the upper shell connecting block 13 and the lower shell connecting block 12 are connected by fastening bolts 5. Of course, the upper shell connecting block 13 and the lower shell connecting block 12 can also be connected by other fasteners such as screws and rivets.

[0062] Optionally, the linear motor further includes a stator 7 and a mover 10 , the stator 7 is fixed in the lower housing 6 , the mover 10 is fixed on the central guide shaft 4 , and the position indicating unit is arranged on the mover 10 .

[0063] Specifically, Figure 3 As shown, the position indicating unit in this embodiment is a rack 17, the electromagnetic position sensor unit 18 is installed on the magnetic sensing device mounting base 20, the fastening bolt 19 is used to fasten the electromagnetic position sensor unit 18, the electromagnetic position sensor unit 18 passes through the shell, and there is a gap between the electromagnetic position sensor unit 18 and the rack 17.

[0064] Therefore, in this embodiment, by setting the rack 17 on the mover 10, the electromagnetic position sensing unit 18 can more accurately complete the real-time sensing and recording of the current stroke of the linear motor, and more effectively grasp and adjust the movement position and stroke of the linear motor in real time, thereby greatly expanding the function of the linear motor, such as realizing the damping control of the linear motor, the electromagnetic suspension height compensation of the linear motor, and the side deviation state adjustment of the vehicle body.

[0065] Alternatively, if Figures 1 to 3 As shown, the linear motor is a cylinder-type linear motor.

[0066] Optionally, the linear motor is a plate-type linear motor, and the plate-type linear motor may be a double-plate, triple-plate or other multi-plate linear motor, such as Figure 4As shown, the plate-type linear motor includes a stator coil 22 and a stator coil mounting plate 23 , and the rack 21 is disposed between the two stator coil mounting plates 23 .

[0067] Alternatively, if Figure 1 As shown, the linear motor also includes an upper mounting ear 1, a lower mounting ear 9 and a spring 2. The spring 2 is installed between the upper mounting ear 1 and the housing, so that the position data measured by the electromagnetic position sensing unit 14 is also equivalent to the compression and rebound position of the spring 2.

[0068] Alternatively, if Figure 1 As shown, the linear motor also includes a lower guide shaft 8, which is located inside the shell. One end of the center guide shaft 4 is fixedly connected to the upper mounting ear 1, and the other end of the center guide shaft 4 is slidably connected to the lower guide shaft 8.

[0069] In this embodiment, the central guide shaft 4 is guided by the lower guide shaft 8, so that the linear reciprocating motion of the linear motor is more stable and reliable.

[0070] In a second aspect, in one embodiment, a suspension is provided, the suspension comprising a control system and a linear motor as mentioned in the first aspect.

[0071] In a third aspect, in one embodiment, a vehicle is provided, the vehicle comprising the linear motor as described in the first aspect, or comprising a suspension as described in the second aspect.

[0072] Among them, the position data measured by the electromagnetic position sensing unit in this embodiment is also equivalent to the compression and rebound data of the suspension, so that the control system can calculate the roll of the vehicle at the suspension through the measured position data, and further realize the roll compensation adjustment of the vehicle, that is, realize the linear motor electromagnetic suspension height compensation, and the body side deviation state adjustment and other functions.

[0073] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0074] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A linear motor, characterized in that: include: case; A central guide shaft (4), the central guide shaft (4) being arranged in the housing and being capable of axial movement relative to the housing; A position indicating unit, wherein the position indicating unit is arranged on the central guide shaft (4); The position sensing unit is disposed on the shell and passes through the shell.

2. The linear motor according to claim 1, characterized in that: There is a gap between the position indicating unit and the position sensing unit.

3. The linear motor according to claim 1, characterized in that: The position sensing unit is a photoelectric position sensing unit or an electromagnetic position sensing unit.

4. The linear motor according to claim 3, characterized in that: The position sensing unit is an electromagnetic position sensing unit (14), and the position indicating unit is a rack (11).

5. The linear motor according to claim 4, characterized in that: It also comprises a magnetic induction device mounting seat (16), wherein the magnetic induction device mounting seat (16) is arranged on the housing, the electromagnetic position sensing unit (14) is mounted on the magnetic induction device mounting seat (16), and there is a gap between the electromagnetic position sensing unit (14) and the rack (11).

6. The linear motor according to claim 4, characterized in that: The rack (11) is provided with a calibration position tooth, the depth of which is different from the depth of other teeth of the rack.

7. The linear motor according to claim 4, characterized in that: The rack (11) and the central guide shaft (4) are an integral component, or the rack (11) is fixedly connected to the central guide shaft (4).

8. The linear motor according to claim 5, characterized in that: The magnetic induction device mounting seat (16) comprises a clamping piece and a fastener, wherein the clamping piece is used to clamp the electromagnetic position sensing unit (14), and the fastener is used to fasten the electromagnetic position sensing unit (14).

9. The linear motor according to claim 1, characterized in that: The shell comprises an upper shell (3) and a lower shell (6); the upper shell (3) is provided with an upper shell connecting block (13); the lower shell (6) is provided with a lower shell connecting block (12); the upper shell connecting block (13) is detachably connected to the lower shell connecting block (12).

10. The linear motor according to any one of claims 1 to 6, 8 or 9, characterized in that: It also includes a stator (7) and a mover (10), the shell includes an upper shell (3) and a lower shell (6), the stator (7) is fixed in the lower shell (6), the mover (10) is fixed on the central guide shaft (4), and the position indicating unit is arranged on the mover (10).

11. The linear motor according to claim 10, characterized in that: The linear motor is a cylinder-type linear motor or a plate-type linear motor.

12. The linear motor according to claim 11, characterized in that: The plate-type linear motor comprises at least two stator coil mounting plates, and the position indicating unit is arranged between the two stator coil mounting plates.

13. The linear motor according to claim 1, characterized in that: It also comprises an upper mounting ear (1), a lower mounting ear (9) and a spring, wherein the spring is mounted between the upper mounting ear (1) and the housing.

14. The linear motor according to claim 13, characterized in that: It also includes a lower guide shaft (8), which is located inside the shell. One end of the central guide shaft (4) is fixedly connected to the upper mounting ear (1), and the other end of the central guide shaft (4) is slidably connected to the lower guide shaft.

15. A suspension, characterized in that: It comprises a control system and a linear motor as described in any one of claims 1 to 14.

16. A vehicle, characterized in that: It comprises a linear motor as claimed in any one of claims 1 to 14, or comprises a suspension as claimed in claim 15.

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