actuator

Abstract

An actuator for a head-up display includes: a linkage configured to be attached to one end of an aspherical mirror; a drive force transmission structure including a lead screw configured to move the linkage; a driver configured to allow the lead screw to rotate about a rotation axis of the motor when the motor is driven; a motor bracket disposed on top of the motor and attached to the driver to support the driver; a top motor mount disposed on top of the motor; a bottom motor mount disposed on bottom of the motor; a vibration damping portion disposed between the top motor mount and the motor bracket and configured to absorb vibrations from the motor; and a cantilevered dynamic vibration absorber disposed at both ends of the bottom motor mount and configured to absorb vibrations from the motor. The actuator provided in this application can reduce manufacturing costs and minimize the overall weight of the actuator by using the vibration damping portion and the cantilevered dynamic vibration absorber.

Description

Technical Field

[0001] This disclosure relates to an actuator for a head-up display drive module, and more specifically, to a vibration absorption device for an actuator for a head-up display. Background Technology

[0002] The following description provides background information in connection with this disclosure and does not constitute prior art.

[0003] A head-up display (HUD) is a device that displays images such as vehicle speed, remaining fuel, and navigation information on the windshield that forms the front window of a vehicle. HUDs are typically configured to project information from an image generation unit onto the windshield.

[0004] Head-up displays use a motor to rotate an aspherical mirror. As the motor's revolutions per minute (RPM) increases, the motor's vibration (i.e., the motor's acceleration) increases. Conventional head-up displays disclose techniques for suppressing motor vibration by using dynamic vibration absorbers made of metals such as brass.

[0005] However, metal dynamic vibration absorbers, such as those made of brass, are heavier than components such as the motor and the motor mount used to hold it in place. This can increase the manufacturing cost of the actuators used in head-up displays and also increase the overall weight of the actuators. A problem with head-up displays based on conventional technology is that if the motor operates at high RPMs, the motor's vibrations cannot be damped, and therefore, noise is generated. Utility Model Content

[0006] Embodiments of this disclosure provide an actuator for a head-up display that reduces manufacturing costs and minimizes the overall weight of the actuator used in a head-up display by using a vibration damping section and a cantilevered dynamic vibration absorber.

[0007] Embodiments of this disclosure provide an actuator for a head-up display that can handle low-frequency vibrations and attenuate vibrations and noise from a motor by using a cantilevered dynamic vibration absorber.

[0008] Embodiments of this disclosure provide an actuator for a head-up display that enhances assemblability by adjusting the connection angle of the lower mounting component and the connection position of the cantilevered dynamic vibration absorber.

[0009] The problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description other problems not mentioned herein.

[0010] An actuator for a head-up display is provided according to an embodiment of the present disclosure. The actuator includes: a linkage configured to be attached to one end of an aspherical mirror; a drive force transmission structure including a lead screw configured to move the linkage; a driver configured to allow the lead screw to rotate about a rotation axis of the motor when the motor is driven; a motor bracket disposed on top of the motor and attached to the driver to support the driver; a top motor mount disposed on top of the motor; a bottom motor mount disposed on bottom of the motor; a vibration damping portion disposed between the top motor mount and the motor bracket and configured to absorb vibrations from the motor; and a cantilevered dynamic vibration absorber disposed at both ends of the bottom motor mount and configured to absorb vibrations from the motor.

[0011] The vibration damping portion includes: a first through-hole formed as part of either end of the top motor mount; a first damper fitted and attached to the motor bracket to absorb vibrations from the motor, the first damper including a first damper hole corresponding to the first through-hole; a first shoulder threaded member penetrating the first through-hole, the first damper hole, and the motor bracket; and a first nut connected to the first shoulder threaded member.

[0012] The cantilevered dynamic vibration absorber includes: a second through-hole formed to pass through a portion of either end of the bottom motor mount; a second damper fitted and attached to the bottom motor mount to absorb vibrations from the motor, the second damper including a second damper hole corresponding to the second through-hole; a dynamic vibration absorber external threaded member penetrating at least a portion of the second damper hole and the second through-hole; and a second nut connected to the dynamic vibration absorber external threaded member.

[0013] The external thread of the dynamic vibration absorber is adjusted to a preset mass and preset length so that the natural frequency of the motor is equal to the target frequency of the cantilever dynamic vibration absorber as calculated.

[0014] The cantilevered dynamic vibration absorber further includes a flange bushing penetrating at least a portion of the second damper hole and the second through hole, and wherein the external threaded component of the dynamic vibration absorber includes: a first threaded portion penetrating the flange bushing and fastened to the second nut; a first rod extending in the diametrical direction of the first threaded portion, the first rod extending toward the bottom of the motor; and a first head extending in the diametrical direction of the first rod, the ...

[0015] The external threaded component of the dynamic vibration absorber includes: a second threaded portion fastened to the second nut; a second rod body, shaped to be wider than the second threaded portion along the diameter direction of the second threaded portion, and the second rod body penetrating the second through hole and the second damper hole; a first shoulder, shaped to be wider than the second rod body along the diameter direction of the second rod body; and a second head, shaped to be narrower than the first shoulder along the diameter direction of the first shoulder, and the second head extending toward the bottom of the motor.

[0016] The cantilevered dynamic vibration absorber further includes a second shouldered threaded component, which passes through the second through hole, the second damper hole, and the second nut. The second shouldered threaded component includes: a third threaded portion fastened to the second nut; a second shoulder portion, which is shaped to be wider than the third threaded portion along the diametrical direction of the third threaded portion, and the second shoulder portion penetrates the second through hole and the second damper hole; and a third head portion, which is shaped to be wider than the second shoulder portion along the diametrical direction of the second shoulder portion.

[0017] The second shouldered threaded member includes a threaded hole that penetrates the third head and passes through at least a portion of the second shoulder, and wherein the dynamic vibration absorber external threaded member includes: a fourth threaded portion that is coupled to the threaded hole and extends toward the bottom of the motor; and a fourth head that is shaped to be wider than the fourth threaded portion along the diametrical direction of the fourth threaded portion.

[0018] The cantilevered dynamic vibration absorber is positioned at a location corresponding to the area where the vibration damping section is located.

[0019] The bottom motor mount can rotate at a predetermined angle relative to the top motor mount and is positioned at the bottom of the motor to prevent physical interference with the vibration damping portion.

[0020] The vibration damping portion is further configured to absorb noise from the motor; the cantilever dynamic vibration absorber is further configured to absorb noise from the motor; or a combination of the above.

[0021] According to another embodiment of this disclosure, an actuator is provided for a head-up display of a vehicle, the actuator comprising: a linkage configured to be attached to one end of an aspherical mirror; a drive force transmission structure including a lead screw configured to move the linkage; a motor; a controller configured to control the motor; a driver configured to guide the lead screw to rotate about a rotational axis of the motor when the motor is driven; a motor bracket disposed on top of the motor and attached to the driver to support the driver; a top motor mount disposed on top of the motor; a bottom motor mount disposed on bottom of the motor; a vibration damping portion disposed between the top motor mount and the motor bracket, and the vibration damping portion configured to attenuate vibrations from the motor; and a cantilevered dynamic vibration absorber disposed at both ends of the bottom motor mount and configured to absorb vibrations from the motor.

[0022] The vibration damping portion is further configured to absorb noise from the motor; the cantilever dynamic vibration absorber is further configured to absorb noise from the motor; or a combination of the above.

[0023] The vibration damping portion includes: a first through hole formed through the top motor mount; a first damper fitted and attached to the motor bracket to absorb vibrations from the motor, the first damper including a first damper hole corresponding to the first through hole; a first shoulder threaded member penetrating the first through hole, the first damper hole and the motor bracket; and a first nut connected to the first shoulder threaded member.

[0024] The cantilevered dynamic vibration absorber includes: a second through-hole formed to pass through a portion of either end of the bottom motor mount; a second damper fitted and attached to the bottom motor mount to absorb vibrations from the motor, the second damper including a second damper hole corresponding to the second through-hole; a dynamic vibration absorber external threaded member penetrating at least a portion of the second damper hole and the second through-hole; and a second nut connected to the dynamic vibration absorber external threaded member.

[0025] The external thread of the dynamic vibration absorber can be adjusted to a preset mass and preset length to set the natural frequency of the motor to be equal to the target frequency of the cantilever dynamic vibration absorber.

[0026] According to embodiments of this disclosure, a vibration absorption configuration for a head-up display drive module can reduce manufacturing costs and minimize the total weight of the actuator used in the head-up display by using a vibration damping section and a cantilevered dynamic vibration absorber.

[0027] According to embodiments of this disclosure, a vibration absorption device for a head-up display drive module can handle low-frequency vibrations and attenuate vibrations and noise from the motor by using a cantilevered dynamic vibration absorber.

[0028] According to embodiments of this disclosure, a vibration absorbing device for a head-up display drive module can enhance assemblability by adjusting the connection angle of the lower mounting component and the connection position of the cantilevered dynamic vibration absorber. Attached Figure Description

[0029] Figure 1 This is a view showing an actuator for a head-up display according to an embodiment of the present disclosure.

[0030] Figure 2 This is an exploded perspective view showing an actuator for a head-up display according to an embodiment of the present disclosure.

[0031] Figure 3 It is along Figure 1 The cross-sectional view taken by line A-A' shows a cantilevered dynamic vibration absorber according to a first embodiment of the present disclosure.

[0032] Figure 4 It is along Figure 1 The cross-sectional view taken by line A-A' shows a cantilevered dynamic vibration absorber according to a second embodiment of the present disclosure.

[0033] Figure 5 It is along Figure 1 The cross-sectional view taken by line A-A' shows a cantilevered dynamic vibration absorber according to a third embodiment of the present disclosure.

[0034] Figure 6 This is a perspective view showing another example of the connection position of the bottom motor bracket according to an embodiment of the present disclosure.

[0035] Figure 7 It is a graph showing the vibration reduction curve of a dynamic vibration absorber according to conventional technology and the present disclosure. Detailed Implementation

[0036] Figure 1 This is a view showing an actuator for a head-up display according to an embodiment of the present disclosure.

[0037] Figure 2 This is an exploded perspective view showing an actuator for a head-up display according to an embodiment of the present disclosure.

[0038] refer to Figure 1 and Figure 2According to embodiments of the present disclosure, an actuator 100 for a head-up display includes some or all of the following: a link 110, a drive force transmission structure 120, a driver 130, a motor bracket 140, a top motor mount 132, a bottom motor mount 133, a vibration damping portion 150, and a cantilevered dynamic vibration absorber 160.

[0039] Link 110 may be attached to an aspherical mirror (not shown) and a drive force transmission structure 120. Link 110 may be configured to be attached to one end of the aspherical mirror. Link 110 may be arranged between the drive force transmission structure 120 and the aspherical mirror (not shown) to connect these components.

[0040] Spherical mounts (not shown) may be formed on opposite ends of the aspherical mirror to allow the aspherical mirror (not shown) to rotate. Link 110 may interact with drive force transmission structure 120 and allow the aspherical mirror to rotate about the axis of rotation of the spherical mount (not shown).

[0041] The drive force transmission structure 120 may include some or all of the lead screw 121 and the guide shaft 122. The drive force transmission structure 120 may move in an arc at the other end of the connecting rod 110.

[0042] The lead screw 121 is configured to rotate via a rotating shaft connected to and extending to the motor 131, and the lead screw may be integrally formed with the drive force transmission structure 120, or formed as a detachable structure that can be assembled / disassembled. The lead screw 121 can move the connecting rod 110. A controller (e.g., a processor), not shown, may be configured to control or actuate the motor 131.

[0043] A guide shaft 122 may be formed between the lead screw mount 143 and the damper mount 142, spaced apart from and parallel to the lead screw 121. The guide shaft 122 may penetrate a portion of the connecting rod 110 and be attached to that portion. As the connecting rod 110 moves along the lead screw 121, the guide shaft 122 may guide the connecting rod 110 along the range of motion, so that the connecting rod 110 moves without rotation.

[0044] The driver 130 may include some or all of the following: motor 131, top motor mount 132, bottom motor mount 133, and body 134.

[0045] Motor 131 can be a DC motor, AC motor, induction motor, synchronous motor, stepper motor, servo motor, brushless motor, linear motor, or permanent magnet synchronous motor (PMSM).

[0046] The top motor mount 132 can be configured to abut against the top surface of the motor 131. The top of the motor 131 refers to the portion near the shaft of the motor 131. The top motor mount 132 can be configured to completely cover the top of the motor 131.

[0047] The top motor mount 132 can be attached to the damper mount 142 using a first shouldered threaded part 152. Both ends of the top motor mount 132 can extend in a direction perpendicular to the axis of the motor 13 for attachment to the damper mount 142.

[0048] The bottom motor mount 133 can be configured to abut against the bottom surface of the motor 131. The shape of the bottom motor mount 133 can correspond to the shape of the top motor mount 132. However, the shape of the bottom motor mount 133 is not limited to the shape of the top motor mount 132. The bottom motor mount 133 can be formed to completely cover the bottom of the motor 131.

[0049] The bottom motor mount 133 may extend at both ends in a direction perpendicular to the axis of the motor 13 for attachment to the damper mount 142. The bottom motor mount 133 may be made of thin sheet metal.

[0050] The body 134 may be formed between the top motor mount 132 and the bottom motor mount 133. The body 134 may be configured to completely cover the side of the motor 131. The body 134 may be formed to connect to the top motor mount 132. However, the shape of the body 134 is not limited to these.

[0051] The motor bracket 140 may include some or all of the housing mount 141, damper mount 142, and lead screw mount 143. The motor bracket 140 may be disposed on top of the motor 131. The motor bracket 140 may be attached to and support the driver 130.

[0052] The housing mount 141 may be configured to abut against a surface of the housing 180. The housing 180 may securely hold an actuator for the head-up display within the head-up display. The housing 180 may include a plurality of bosses (not shown) and holes (not shown) for securing the housing mount 141 in place.

[0053] Multiple bosses (not shown) define the positions where the housing mount 141 is attached to the housing 180. A housing hole (not shown) may be formed in one surface of the housing mount 141, through which a self-tapping screw 181 passes. The self-tapping screw 181 can be secured to multiple holes (not shown) formed in one surface of the housing 180 by penetrating the housing hole (not shown).

[0054] Flexible cable 182 can be arranged between housing 180 and the bracket of motor 131. Flexible cable 182 refers to the wire connected to motor 131. Flexible cable 182 can be installed with both sides exposed (i.e., left and right sides).

[0055] Switch 170 may be located on a portion of housing mount 141. Switch 170 can detect the point at which the aspherical mirror reaches its operating limit.

[0056] The damper mount 142 may be disposed adjacent to the top motor mount 132. The damper mount 142 may be bent perpendicular to the housing mount 141. An opening 142a may be formed in the surface of the damper mount 142 to allow the first damper 153 to be fitted and attached to the damper mount.

[0057] The lead screw 121 can penetrate the surface of the lead screw mounting 143 and be attached thereto. The lead screw mounting 143 can be bent perpendicular to the housing mounting 141.

[0058] The vibration damping portion 150 may include some or all of the following: a first through hole 151, a first shoulder threaded member 152, a first damper 153, a first nut 154, and a flexible connector 155.

[0059] The first through hole 151 may be formed as part of either end of the top motor mount 132. The first shoulder threaded part 152 may penetrate the first through hole 151.

[0060] A first damper 153 may be mounted and attached to a motor bracket 140 to absorb vibrations from a motor 131. Specifically, the first damper may be mounted and attached to a damper mount 142. The first damper 153 attenuates vibrations of the motor 131 passing through the top motor mount 132 and reduces noise generated from within the actuator for the head-up display.

[0061] A first damper 153 may be disposed between the top motor mount 132 and the damper mount 142. The first damper 153 may include a first damper hole 153a formed therethrough and corresponding to the first through hole 151.

[0062] The first damper hole 153a may be formed to pass through one side of the first damper 153, so that the first shouldered threaded member 152 penetrates the first damper. The first nut 154 may be connected to the first shouldered threaded member 152 that has passed through the first through hole 151, the first damper hole 153a and the opening hole 142a.

[0063] The flexible connector 155 can compensate for the eccentricity between the rotation axis of the motor 131 and the rotation axis of the lead screw 121. The flexible connector 155 may have a first hub 155b and a second hub 155c connected to opposite sides of the spacer 155a.

[0064] The rotation axis of motor 131 can be fitted and attached to a first hub 155b connected to one side of flexible connector 155. Lead screw 121 can be fitted and attached to a second hub 155c connected to the other side of flexible connector 155.

[0065] Even if the rotating shafts of motor 131 and lead screw 121 are not aligned, the eccentricity between the shafts can be compensated by using spacer 155a. For example, the flexible coupling 155 according to an embodiment of this disclosure can be an Oldham coupling (cross coupling). Here, the Oldham coupling is used as a connector to compensate for the eccentricity between the shafts connected to both sides. However, the type of flexible coupling 155 is not limited to this.

[0066] The cantilever dynamic vibration absorber 160 may include a second through hole 161, a second damper 162, a dynamic vibration absorber external thread 163, and a second nut 164. The cantilever dynamic vibration absorber 160 may be disposed at both ends of the bottom motor mounting member 133.

[0067] The second through hole 161 may be formed as part of either end of the bottom motor mount 133.

[0068] The second damper 162 may be fitted and attached to the bottom motor mount 133 to absorb vibrations from the motor 131. The second damper 162 may attenuate vibrations of the motor 131 passing through the bottom motor mount 133 and reduce noise generated from within the actuator for the head-up display. The second damper 162 may include a second damper hole 162a formed therethrough and corresponding to the second through-hole 161.

[0069] The external thread 163 of the dynamic vibration absorber can penetrate at least a portion of the second through hole 161 and the second damper hole 162a. The external thread 163 of the dynamic vibration absorber can be adjusted to a preset mass and a preset length such that the natural frequency of the motor 131 and the target frequency of the cantilever dynamic vibration absorber 160 are calculated to be equal.

[0070] The external threaded component 163 of the dynamic vibration absorber is cantilevered, thereby allowing adjustment of its axial length. The length of the external threaded component 163 can be determined based on the amplitude and frequency of the vibration generated by the motor 131. The length of the external threaded component 163 can be adjusted so that the natural frequency of the motor 131 and the natural frequency of the cantilevered dynamic vibration absorber 160 are synchronized.

[0071] The second nut 164 can be connected to the external threaded part 163 of the dynamic vibration absorber that penetrates the second through hole 161 and the second damper hole 162a.

[0072] The cantilevered dynamic vibration absorber 160 can be positioned at a location corresponding to the area where the vibration damping part 150 is located.

[0073] Figure 3 It is along Figure 1 The cross-sectional view taken by line A-A' shows a cantilevered dynamic vibration absorber according to a first embodiment of the present disclosure.

[0074] refer to Figure 3 The cantilevered dynamic vibration absorber 160 according to the first embodiment of this disclosure may further include a flange bushing 165 that at least partially penetrates the second through-hole 161 and the second damper hole 162a. The flange portion of the flange bushing 165 may be configured to cover at least a portion of the top of the second damper 162. Forces applied to the flange portion may be distributed to the second damper 162, thereby increasing the total compressive force.

[0075] According to a first embodiment of the present disclosure, the external threaded part 163 of the dynamic vibration absorber may include a first threaded portion 163a, a first rod body 163b, and a first head 163c.

[0076] The first threaded portion 163a can penetrate the flange bushing 165. The first threaded portion 163a can be fastened to the second nut 164.

[0077] The first rod 163b can be formed to connect to the first threaded portion 163a. ​​The first rod 163b can be shaped to be wider than the first threaded portion 163a along the diameter direction of the first threaded portion 163a. ​​The first rod 163b can extend toward the bottom of the motor 131. The length of the first rod 163b can be adjusted so that the natural frequency of the motor 131 and the natural frequency of the cantilever dynamic vibration absorber 160 are consistent with each other.

[0078] The first head 163c can be formed to connect to the first shaft 163b. The first head 163c can be shaped to be wider than the first shaft 163b along the diameter direction of the first shaft 163b.

[0079] Figure 4 It is along Figure 1 The cross-sectional view taken along line A-A' shows a cantilevered dynamic vibration absorber according to a second embodiment of the present disclosure. Here, details related to the embodiment will be omitted. Figure 1 and Figure 2 The description of the actuator for the head-up display in the embodiments is superimposed on the description.

[0080] refer to Figure 4 According to the second embodiment of the present disclosure, the cantilever dynamic vibration absorber 160 may include some or all of the second threaded portion 263a, the second rod body 263b, the first shoulder portion 263c, and the second head 263d.

[0081] The second threaded portion 263a can be fastened to the second nut 164. The second rod body 263b can be formed to connect to the second threaded portion 263a. The second rod body 263b can be shaped to be wider than the second threaded portion 263a along the diametrical direction of the second threaded portion 263a. The second rod body 263b can penetrate at least a portion of the second through hole 161 and the second damper hole 162a.

[0082] The first shoulder 263c may be formed to connect to the second threaded portion 263a. The first shoulder 263c may be shaped to be wider than the second shaft 263b along the diameter direction of the second shaft 263b. The first shoulder 263c may perform the same function as the flange portion of the flange bushing.

[0083] The second head 263d may be formed to connect to the first shoulder 263c. The second head 263d may be formed inward along the diameter direction of the first shoulder 263c and be smaller in width than the first shoulder 263c. The second head 263d may extend toward the bottom of the motor 131. The length of the second head 263d may be adjusted such that the natural frequency of the motor 131 and the natural frequency of the cantilevered dynamic vibration absorber 160 are consistent with each other.

[0084] Figure 5 It is along Figure 1 The cross-sectional view taken along line A-A' shows a cantilevered dynamic vibration absorber according to a third embodiment of the present disclosure. Here, details related to the embodiment will be omitted. Figure 1 and Figure 2 The description of the actuator for the head-up display in the embodiments is superimposed on the description.

[0085] According to a third embodiment of the present disclosure, the cantilever dynamic vibration absorber 160 may include a second shouldered threaded member 365 penetrating a second through hole 161, a second damper hole 162a, and a second nut 164.

[0086] The second shoulder threaded part 365 may include some or all of the third threaded portion 365a, the second shoulder portion 365b, and the third head 365c.

[0087] The third threaded portion 365a can be fastened to the second nut 164. The second shoulder portion 365b can be formed by connecting to the third threaded portion 365a. The second shoulder portion 365b can be shaped to be wider than the third threaded portion 365a along the diametrical direction of the third threaded portion 365a. The second shoulder portion 365b can penetrate at least a portion of the second through hole 161 and the second damper hole 162a.

[0088] The third head 365c may be formed to connect to the second shoulder 365b. The third head 365c may be shaped to be wider than the second shoulder 365b along the diameter direction of the second shoulder 365b.

[0089] The second shoulder threaded member 365 may include a threaded hole 365d that penetrates at least a portion of the third head 365c and the second shoulder 365b.

[0090] The external threaded part 163 of the dynamic vibration absorber according to the third embodiment of this disclosure may include some or all of the fourth threaded part 163a and the fourth head 363b.

[0091] The fourth threaded portion 363a can penetrate at least a portion of the threaded hole 365d and connect to the second shouldered threaded member 365. The fourth threaded portion 363a can extend toward the bottom of the motor 131. The length of the fourth head 363b can be adjusted so that the natural frequency of the motor 131 and the natural frequency of the cantilevered dynamic vibration absorber 160 are synchronized.

[0092] The fourth head 363b may be formed to connect to the fourth threaded portion 363a. The fourth head 363b may be shaped to be wider than the fourth threaded portion 363a along the diametrical direction of the fourth threaded portion 363a.

[0093] Figure 6 This is a perspective view showing another example of the connection position of the bottom motor bracket according to an embodiment of the present disclosure. Here, details related to the embodiment according to... Figure 1 and Figure 2 The description of the actuator for the head-up display in the embodiments is superimposed on the description.

[0094] Reference Figure 6 The bottom motor mount 133 can rotate at a certain angle relative to the top motor mount 132. After rotating at a certain angle, the bottom motor mount 133 can be positioned at the bottom of the motor 131, thereby preventing physical interference with the vibration damping portion 150.

[0095] Figure 7It is a graph showing the vibration reduction curve of a dynamic vibration absorber according to conventional technology and the present disclosure.

[0096] Figure 7 Line a represents the vibration reduction curve of the head-up display without the vibration damping section 150 and the cantilever dynamic vibration absorber 160 installed. Figure 7 Line b represents the vibration reduction curve with only the cantilevered dynamic vibration absorber 160 installed. In line a, the vibration amplitude varies greatly with frequency, and the vibration reduction effect disappears as the main structure enters resonance. In line b, the cantilevered dynamic vibration absorber 160 reduces the vibration somewhat, but the vibration level remains high.

[0097] Figure 7 Line c represents the vibration reduction curve obtained by increasing the weight of the mass of the cantilever dynamic vibration absorber 160. Figure 7 Line d represents the vibration reduction curve obtained when the cantilever dynamic vibration absorber 160 with vibration damping section 160 and damper is installed, as in the embodiments of this disclosure. In line c, a shift in resonant frequency occurs away from the operating range, resulting in a reduction in amplitude within the operating range; however, issues regarding the safety of the cantilever dynamic vibration absorber 160 and size limitations depending on the installation location still exist.

[0098] Line d shows a significant reduction in vibration response at both resonant frequencies, which can lead to an overall reduction in amplitude. Furthermore, it enables a reduction in load over the operating range and improves the safety of the cantilevered dynamic vibration absorber.

[0099] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0078118, filed with the Korean Intellectual Property Office on June 17, 2024, the entire contents of which are incorporated herein by reference for all purposes.

Claims

1. An actuator for a head-up display, characterized in that, The actuator includes: The connecting rod is configured to be attached to one end of the aspherical mirror; A drive force transmission structure includes a lead screw configured to move the connecting rod; A driver configured to allow the lead screw to rotate about the rotation axis of the motor when the motor is driven; A motor bracket is disposed on top of the motor and attached to the driver to support the driver; A top motor mounting bracket is disposed on the top of the motor; A bottom motor mounting bracket is provided on the bottom of the motor; A vibration damping section is disposed between the top motor mount and the motor bracket, and configured to absorb vibrations from the motor; and A cantilevered dynamic vibration absorber is disposed at both ends of the bottom motor mounting and configured to absorb vibrations from the motor.

2. The actuator of claim 1, wherein, The vibration damping component includes: The first through hole is formed as part of either end of the top motor mount; A first damper is assembled and attached to the motor bracket to absorb vibrations from the motor, the first damper including a first damper hole corresponding to the first through hole; A first shouldered threaded component penetrates the first through hole, the first damper hole, and the motor bracket; and The first nut is connected to the first shouldered threaded part.

3. The actuator of claim 1, wherein, The cantilever dynamic vibration absorber includes: The second through hole is formed as part of either end of the bottom motor mount; A second damper, assembled and attached to the bottom motor mount to absorb vibrations from the motor, the second damper including a second damper hole corresponding to the second through hole; The dynamic vibration absorber external threaded component penetrates at least a portion of the second damper hole and the second through hole; and The second nut is connected to the external thread of the dynamic vibration absorber.

4. The actuator of claim 3, wherein, The external thread of the dynamic vibration absorber is adjusted to a preset mass and preset length so that the natural frequency of the motor is equal to the target frequency of the cantilever dynamic vibration absorber as calculated.

5. The actuator of claim 4, wherein, The cantilevered dynamic vibration absorber further includes a flange bushing that penetrates at least a portion of the second damper hole and the second through hole, and The external threaded component of the dynamic vibration absorber includes: The first threaded portion penetrates the flange bushing and is fastened to the second nut; The first rod body, extending along the diametrical direction of the first threaded portion, is wider than the first threaded portion, and extends towards the bottom of the motor; and The first head, along the diameter direction of the first shaft, is wider than the first shaft.

6. The actuator of claim 4, wherein, The external threaded component of the dynamic vibration absorber includes: The second threaded portion is fastened to the second nut; The second rod body is shaped to be wider than the second threaded portion along the diameter direction of the second threaded portion, and the second rod body penetrates the second through hole and the second damper hole; The first shoulder, extending along the diameter of the second shaft, is wider than the second shaft; and The second head is formed inward along the diametrical direction of the first shoulder and is smaller in width than the first shoulder, and the second head extends toward the bottom of the motor.

7. The actuator of claim 4, wherein, The cantilevered dynamic vibration absorber also includes a second shouldered threaded component, which passes through the second through hole, the second damper hole, and the second nut. The second shouldered threaded component includes: The third threaded portion is fastened to the second nut; The second shoulder, shaped along the diametrical direction of the third threaded portion, is wider than the third threaded portion, and the second shoulder penetrates the second through hole and the second damper hole; and The third head, along the diameter direction of the second shoulder, is wider than the second shoulder.

8. The actuator of claim 7, wherein, The second shouldered threaded member includes a threaded hole that penetrates the third head and passes through at least a portion of the second shoulder, and The external threaded component of the dynamic vibration absorber includes: A fourth threaded portion, connected to the threaded hole and extending toward the bottom of the motor; and The fourth head, along the diameter direction of the fourth threaded portion, is shaped such that its width is greater than that of the fourth threaded portion.

9. The actuator of claim 4, wherein, The cantilevered dynamic vibration absorber is positioned at a location corresponding to the area where the vibration damping section is located.

10. The actuator of claim 4, wherein, The bottom motor mount can rotate at a predetermined angle relative to the top motor mount and is positioned at the bottom of the motor to prevent physical interference with the vibration damping portion.

11. The actuator of claim 1, wherein, One of the following conditions must be met: The vibration damping section is also configured to absorb noise from the motor; The cantilevered dynamic vibration absorber is also configured to absorb noise from the motor; or The combination of the two above.

12. An actuator for a head-up display of a vehicle, characterized in that The actuator includes: The connecting rod is configured to be attached to one end of the aspherical mirror; A drive force transmission structure includes a lead screw configured to move the connecting rod; motor; Controller, configured to control the motor; A driver configured to guide the lead screw to rotate about the rotation axis of the motor when the motor is driven; A motor bracket is disposed on top of the motor and attached to the driver to support the driver; A top motor mounting bracket is disposed on the top of the motor; A bottom motor mounting bracket is provided on the bottom of the motor; A vibration damping portion is disposed between the top motor mount and the motor bracket, and the vibration damping portion is configured to attenuate vibrations from the motor; and A cantilevered dynamic vibration absorber is disposed at both ends of the bottom motor mounting and configured to absorb vibrations from the motor.

13. The actuator of claim 12, wherein, One of the following conditions must be met: The vibration damping section is also configured to absorb noise from the motor; The cantilevered dynamic vibration absorber is also configured to absorb noise from the motor; or The combination of the two above.

14. The actuator of claim 12, wherein, The vibration damping component includes: A first through hole is formed to pass through the top motor mounting member; A first damper is assembled and attached to the motor bracket to absorb vibrations from the motor, the first damper including a first damper hole corresponding to the first through hole; A first shouldered threaded component penetrates the first through hole, the first damper hole, and the motor bracket; and The first nut is connected to the first shouldered threaded part.

15. The actuator of claim 12, wherein, The cantilever dynamic vibration absorber includes: The second through hole is formed as part of either end of the bottom motor mount; A second damper, assembled and attached to the bottom motor mount to absorb vibrations from the motor, the second damper including a second damper hole corresponding to the second through hole; The dynamic vibration absorber external threaded component penetrates at least a portion of the second damper hole and the second through hole; and The second nut is connected to the external thread of the dynamic vibration absorber.

16. The actuator of claim 15, wherein, The external thread of the dynamic vibration absorber can be adjusted to a preset mass and preset length to set the natural frequency of the motor to be equal to the target frequency of the cantilever dynamic vibration absorber.

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