A motor assembly and a head-up display

Abstract

A motor assembly and a head-up display (HUD) are disclosed, relating to the field of HUD display system technology. The motor assembly includes a motor body, a motor bracket, a worm gear, and an elastic element. The motor bracket includes a first mounting plate and a second mounting plate spaced apart from each other, connected by a first support plate. One end of the elastic element abuts against the first mounting plate, and the other end abuts against the second mounting plate. The worm gear is connected to the output end of the motor body, which is located on the side of the second mounting plate opposite to the first mounting plate. The worm gear passes through the second mounting plate, the elastic element, and the first mounting plate in sequence. The worm gear drives the reflector bracket of the HUD to rotate. This motor assembly can improve the stability and accuracy of the reflector rotation of the HUD while extending the service life of the motor assembly.

Description

Technical Field

[0001] This utility model relates to the field of HUD display system technology, and more specifically, to a motor assembly and a head-up display. Background Technology

[0002] A vehicle-mounted HUD (Head-Up Display) is a display system that projects driving information into the driver's line of sight through optical reflection, effectively reducing driver eye deviation and improving driving safety. As one of the core components of a HUD, the stability and adjustment precision of the reflector's axis directly determine the clarity and dynamic adaptability of the projected image.

[0003] Existing reflector brackets typically use a motor worm gear for rotation. Currently, most worm gears do not have an elastic element installed along their axis, which can easily lead to worm gear vibration, resulting in decreased stability of the rotating shaft and consequently reduced adjustment accuracy of the reflector. A small number of worm gears have an elastic element, but this element is located at the end of the worm gear furthest from the motor, applying force to the motor shaft and potentially reducing the motor's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a motor assembly and a head-up display that can improve the stability and accuracy of the head-up display's reflector rotation while extending the service life of the motor assembly.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In one aspect, this utility model provides a motor assembly, including a motor body, a motor bracket, a worm gear, and an elastic element; the motor bracket includes a first assembly plate and a second assembly plate arranged at relative intervals, the first assembly plate and the second assembly plate being connected by a first support plate; one end of the elastic element abuts against the first assembly plate and the other end abuts against the second assembly plate; the worm gear is connected to the output end of the motor body, the motor body is disposed on the side of the second assembly plate opposite to the first assembly plate, and the worm gear passes through the second assembly plate, the elastic element, and the first assembly plate in sequence; the worm gear is used to drive the reflector bracket of the head-up display to rotate.

[0007] Optionally, the elastic element includes a first abutting plane, a second abutting plane, and a connecting plate; the first abutting plane abuts and fits against the first assembly plate, and the second abutting plane abuts and fits against the second assembly plate; the two sides of the connecting plate are respectively connected to the first abutting plane and the second abutting plane.

[0008] Optionally, there are two second abutment surfaces and two connecting plates, with the two second abutment surfaces spaced apart; the two connecting plates are respectively connected to the opposite sides of the first abutment surface.

[0009] Optionally, the second abutting plane is provided with a positioning hole, and the periphery of the positioning hole is provided with a first limiting wall; the second assembly plate is provided with an assembly hole corresponding to the positioning hole, and the periphery of the assembly hole is provided with a second limiting wall; the first limiting wall can be sleeved on the outer wall of the second limiting wall.

[0010] Optionally, the connecting plate is provided with at least one bend along the elastic force direction of the elastic element.

[0011] Optionally, the motor bracket also includes a third assembly plate, which is arranged parallel to the first assembly plate at a distance; the third assembly plate and the first assembly plate are connected by a second support plate; the worm gear passes through the second assembly plate, the elastic element, the first assembly plate and the third assembly plate in sequence.

[0012] Optionally, the second support plate is vertically disposed on one side of the first assembly plate, and the first support plate is vertically disposed on the other side of the assembly plate; a limiting plate is vertically disposed on the side of the first abutting plane of the elastic member close to the second support plate, and the limiting plate can be attached to the outer wall of the second support plate.

[0013] Optionally, the worm includes a shaft and a worm wheel sleeved on the outer wall of the shaft, the worm wheel having multiple helical teeth along the shaft axis; the motor assembly also includes a transmission gear that meshes with the helical teeth; the worm drives the reflector bracket of the head-up display to rotate via the transmission gear.

[0014] Optionally, the motor bracket is provided with a transmission rod, the extension direction of which is perpendicular to the extension direction of the worm gear; a transmission gear is rotatably mounted on the transmission rod, and the end face of the transmission gear is drivenly connected to the rotating shaft of the reflector bracket.

[0015] Another aspect of this utility model provides a head-up display, including a reflector bracket and a motor assembly; the reflector bracket includes a frame and a rotating shaft disposed on one side of the frame; the motor assembly includes a motor body and a worm gear, the worm gear being connected to the output end of the motor body, and the motor body driving the rotating shaft through the worm gear to cause the frame to rotate along the axis of the rotating shaft.

[0016] The beneficial effects of this utility model include:

[0017] This application provides a motor assembly including a motor body, a motor bracket, a worm gear, and an elastic element. The motor bracket includes a first mounting plate and a second mounting plate spaced apart from each other, connected by a first support plate. One end of the elastic element abuts against the first mounting plate, and the other end abuts against the second mounting plate. The worm gear is connected to the output end of the motor body, which is located on the side of the second mounting plate opposite to the first mounting plate. The worm gear passes through the second mounting plate, the elastic element, and the first mounting plate in sequence. The worm gear drives the reflector bracket of the head-up display to rotate. The aforementioned motor assembly, through the elastic element, applies an axial elastic force to the worm gear, offsetting the backlash caused by worm gear movement and ensuring stability during worm gear transmission. Furthermore, the elastic element is located on the side of the worm gear closer to the motor, with its elastic force direction opposite to the motor body, preventing the elastic force from directly acting on the motor shaft, reducing the additional load on the motor, and extending the service life of the motor assembly. This motor assembly can improve the stability and accuracy of the head-up display's reflector rotation while extending the service life of the motor assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the motor assembly provided in an embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of the structure of the motor bracket of the motor assembly provided in this embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of the elastic element of the motor assembly provided in this embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a head-up display provided in an embodiment of the present invention.

[0023] Icons: 100-Motor assembly; 110-Motor body; 120-Motor bracket; 111-First assembly plate; 112-Second assembly plate; 1121-Second limiting wall; 113-First support plate; 114-Third assembly plate; 115-Second support plate; 130-Worm gear; 131-Gear body; 132-Worm wheel; 140-Elastic element; 141-First abutting surface; 142-Second abutting surface; 1421-Positioning hole; 1422-First limiting wall; 143-Connecting plate; 1431-Bending part; 144-Limiting plate; 150-Transmission rod; 151-Transmission gear; 200-Head-up display; 210-Reflector bracket; 220-Housing. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figure 1 In one aspect of this application, a motor assembly 100 is provided, including a motor body 110, a motor bracket 120, a worm gear 130, and an elastic element 140. The motor bracket 120 includes a first mounting plate 111 and a second mounting plate 112 arranged at relative intervals, and the first mounting plate 111 and the second mounting plate 112 are connected by a first support plate 113. One end of the elastic element 140 abuts against the first mounting plate 111, and the other end abuts against the second mounting plate 112. The worm gear 130 is connected to the output end of the motor body 110, and the motor body 110 is disposed on the side of the second mounting plate 112 opposite to the first mounting plate 111. The worm gear 130 passes through the second mounting plate 112, the elastic element 140, and the first mounting plate 111 in sequence. The worm gear 130 is used to drive the reflector bracket 210 of the head-up display 200 to rotate.

[0029] Specifically, the motor assembly 100 includes a motor body 110, and a worm gear 130 is connected to the output end of the motor body 110. The motor body 110 can serve as a power source to provide rotational driving force for the worm gear 130, enabling the worm gear 130 to rotate around its axis.

[0030] like Figure 1 and Figure 2 As shown, to improve the rotational stability of the worm gear 130, the motor assembly 100 also includes a motor bracket 120, which is composed of a first mounting plate 111, a second mounting plate 112, and a first support plate 113. The first mounting plate 111 and the second mounting plate 112 are respectively vertically connected to opposite sides of the first support plate 113, such that the first mounting plate 111 and the second mounting plate 112 are arranged parallel to each other and spaced apart.

[0031] Since the elastic element 140 is assembled within the gap between the first assembly plate 111 and the second assembly plate 112, in order to ensure that the elastic element 140 has sufficient assembly space, in a preferred embodiment of this application, as follows: Figure 2 As shown, the first support plate 113 is disposed on the edge of the first assembly plate 111 and the second assembly plate 112, forming a U-shaped structure.

[0032] The elastic element 140 is located between the first assembly plate 111 and the second assembly plate 112, with its two ends abutting against the first assembly plate 111 and the second assembly plate 112 respectively, such that the energy storage direction of the elastic element 140 is in the same direction as the line connecting the first assembly plate 111 and the second assembly plate 112. The elastic element 140, the first assembly plate 111 and the second assembly plate 112 are all provided with coaxial through holes, and the worm gear 130 can pass through the second assembly plate 112, the elastic element 140 and the first assembly plate 111 in sequence to drive the connection with the reflector bracket 210 of the head-up display 200.

[0033] This arrangement not only provides a limiting effect on the elastic element 140, but also allows the first mounting plate 111 and the second mounting plate 112 to provide a limiting effect on the worm gear 130's axis, thus improving the driving stability of the worm gear 130 to a certain extent. Furthermore, the motor assembly 100, through the elastic element 140, applies axial spring force to the worm gear 130, offsetting the backlash caused by the worm gear 130's movement and ensuring the stability of the worm gear 130 during transmission. Moreover, the elastic element 140 is located on the side of the worm gear 130 closer to the motor, unlike existing elastic elements which are typically located on the side of the worm gear furthest from the motor. This arrangement ensures that the spring force of the elastic element 140 is directed away from the motor body 110, preventing the spring force from directly acting on the motor shaft, reducing the additional load on the motor, and extending the service life of the motor assembly 100.

[0034] It should be noted that, in one possible implementation of this application, firstly, as... Figure 1 As shown, the worm gear 130 includes a shaft 131 and a worm wheel 132 sleeved on the outer wall of the shaft 131. The worm wheel 132 has multiple helical teeth along the shaft 131 as the axis. The motor assembly 100 also includes a transmission gear 151, which meshes with the helical teeth. The worm gear 130 drives the reflector bracket 210 of the head-up display 200 to rotate through the transmission gear 151.

[0035] Specifically, the rod body 131 is made of a material with high strength and wear resistance. A worm gear 132 is fitted on the outer wall of the rod body 131. The worm gear 132 has a cylindrical structure and multiple helical teeth on its outer wall. The transmission gear 151 meshes with the helical teeth. When the motor body 110 drives the rod body 131 to rotate, the rod body 131 and the worm gear 132 rotate synchronously, thereby driving the transmission gear 151 to rotate. One side of the transmission gear 151 is driven to connect to the reflector bracket 210 of the head-up display 200. When the gear rotates, it can synchronously drive the reflector bracket 210 to rotate.

[0036] Second, such as Figure 2As shown, the motor bracket 120 also includes a third assembly plate 114, which is arranged parallel to the first assembly plate 111 at intervals; the third assembly plate 114 and the first assembly plate 111 are connected by a second support plate 115; the worm gear 130 passes through the second assembly plate 112, the elastic element 140, the first assembly plate 111 and the third assembly plate 114 in sequence.

[0037] Specifically, in order to further improve the rotational stability of the worm gear 130, such as Figure 2 As shown, the motor bracket 120 also includes a third mounting plate 114, which is disposed on the side of the first mounting plate 111 opposite to the second mounting plate 112. The third mounting plate 114 is connected to the first mounting plate 111 via a second support plate 115, such that the third mounting plate 114 and the first mounting plate 111 are arranged relatively parallel to each other and spaced apart.

[0038] The third assembly plate 114 has another through hole coaxially arranged with the through hole of the first assembly plate 111. The worm gear 130 passes through the first assembly plate 111 and then through the third assembly plate 114. The end of the worm gear 130 can be movably inserted into the protective component through a washer. Figure 2 As shown, preferably, the second support plate 115 and the third assembly plate 114 have an L-shaped structure, and the second support plate 115 is disposed at the end of the first support plate 113 to provide sufficient space for the installation of the worm gear 130.

[0039] To make the motor bracket 120 more stable, the first support plate 113 and the second support plate 115 are respectively disposed on opposite sides of the first assembly plate 111 to ensure that the motor bracket 120 is subjected to more even force.

[0040] The motor assembly 100 provided in this application includes a motor body 110, a motor bracket 120, a worm gear 130, and an elastic element 140. The motor bracket 120 includes a first mounting plate 111 and a second mounting plate 112 arranged at relative intervals, and the first mounting plate 111 and the second mounting plate 112 are connected by a first support plate 113. One end of the elastic element 140 abuts against the first mounting plate 111, and the other end abuts against the second mounting plate 112. The worm gear 130 is connected to the output end of the motor body 110, and the motor body 110 is disposed on the side of the second mounting plate 112 opposite to the first mounting plate 111. The worm gear 130 passes through the second mounting plate 112, the elastic element 140, and the first mounting plate 111 in sequence. The worm gear 130 is used to drive the reflector bracket 210 of the head-up display 200 to rotate. The aforementioned motor assembly 100, through the provision of the elastic element 140, applies an axial elastic force to the worm gear 130, offsetting the backlash caused by the worm gear 130's movement and ensuring the stability of the worm gear 130 during transmission. Furthermore, the elastic element 140 is located on the side of the worm gear 130 closest to the motor, with its elastic force direction away from the motor body 110, preventing the elastic force from directly acting on the motor shaft, reducing the additional load on the motor, and extending the service life of the motor assembly 100. The aforementioned motor assembly 100 can improve the stability and accuracy of the head-up display 200's mirror flipping while extending the service life of the motor assembly 100.

[0041] For example, such as Figure 3 As shown, the elastic member 140 includes a first abutting plane 141, a second abutting plane 142, and a connecting plate 143; the first abutting plane 141 abuts against and fits against the first assembly plate 111, and the second abutting plane 142 abuts against and fits against the second assembly plate 112; the two sides of the connecting plate 143 are respectively connected to the first abutting plane 141 and the second abutting plane 142.

[0042] Specifically, such as Figure 3 As shown, the first abutting plane 141 of the elastic element 140 abuts against and fits against the first assembly plate 111, and the second abutting plane 142 abuts against and fits against the second assembly plate 112. The first abutting plane 141 and the second abutting plane 142 serve as force transmission interfaces, forming a stable contact surface with the assembly plate. The connecting plate 143 is an elastic deformation body, which can both transmit force and offset the gap generated by the worm gear 130 through deformation.

[0043] It should be noted that the elastic element 140 is made of metal. In the prior art, the elastic element 140 is mostly made of plastic, which is prone to deformation at high temperatures, reducing the elastic compensation effect. In contrast, this application uses a metal elastic element 140, which improves its reliability and further enhances the stability of the worm gear 130 during transmission.

[0044] Optionally, such as Figure 3As shown, there are two second abutment surfaces 142 and two connecting plates 143, with the two second abutment surfaces 142 spaced apart; the two connecting plates 143 are respectively connected to the opposite sides of the first abutment surface 141.

[0045] Specifically, such as Figure 3 As shown, the arrangement of the two second abutment planes 142 makes the elastic element 140 form symmetrical axial force application points, so that the resultant force of the elastic force on the worm 130 passes through the axis, avoiding the radial off-center load that may occur in the traditional single-plane structure, preventing the worm 130 from bending and deforming, and improving the service life of the motor assembly 100.

[0046] The number of connecting plates 143 corresponds to the number of second abutment surfaces 142, which is also two. The arrangement of two connecting plates 143 can distribute the load to both sides of the first abutment surface 141, avoiding fatigue fracture caused by local stress concentration in a single connecting plate 143.

[0047] In one possible implementation of this application, such as Figure 3 As shown, the second abutment plane 142 is provided with a positioning hole 1421, and a first limiting wall 1422 is provided around the periphery of the positioning hole 1421; as Figure 2 As shown, the second assembly plate 112 is provided with an assembly hole corresponding to the positioning hole 1421, and a second limiting wall 1121 is provided around the periphery of the assembly hole; the first limiting wall 1422 can be sleeved on the outer wall of the second limiting wall 1121.

[0048] Specifically, this application does not impose any restrictions on the specific number of positioning holes 1421 and assembly holes, as long as the number and location of positioning holes 1421 and assembly holes correspond. When the elastic member 140 and the second assembly plate 112 are assembled through the positioning holes 1421 and assembly holes, the first limiting wall 1422 can be sleeved on the outer wall of the second limiting wall 1121, forming a clearance fit based on a hole, which can limit the axial translation of the elastic member 140; and also, to a certain extent, limit the radial movement of the elastic member 140.

[0049] During assembly, the first limiting wall 1422 and the second limiting wall 1121 can improve the assembly accuracy and efficiency of the elastic element 140, and at the same time can squeeze the worm 130 and apply axial elastic force to the worm 130, thereby improving the transmission stability of the worm 130 and reducing the possibility of the worm 130 moving in unison.

[0050] Optionally, such as Figure 3 As shown, the connecting plate 143 is provided with at least one bent portion 1431 along the elastic force direction of the elastic member 140. Specifically, by providing the bent portion 1431, the elastic path length can be increased within a limited assembly spacing, thereby increasing the deformation of the elastic member 140 and increasing the elastic force of the elastic sheet.

[0051] For example, such as Figure 2 and Figure 3 As shown, the second support plate 115 is vertically disposed on one side of the first assembly plate 111, and the first support plate 113 is vertically disposed on the other side of the assembly plate; a limiting plate 144 is vertically disposed on the side of the first abutting plane 141 of the elastic member 140 near the second support plate 115, and the limiting plate 144 can be attached to the outer wall of the second support plate 115.

[0052] Specifically, such as Figure 3 As shown, the limiting plate 144 is perpendicularly connected to the first abutting plane 141, forming an L-shaped structure. When the first abutting plane 141 abuts against the first assembly plate 111, the limiting plate 144 can fit precisely against the outer wall of the second support plate 115. At this time, the second support plate 115 can play a certain limiting effect on the elastic element 140, preventing the elastic element 140 from shifting position and improving the elastic compensation accuracy of the elastic element 140.

[0053] In one possible implementation of this application, such as Figure 1 and Figure 2 As shown, the motor bracket 120 is provided with a transmission rod 150, the extension direction of the transmission rod 150 is perpendicular to the extension direction of the worm gear 130; the transmission gear 151 is rotatably mounted on the transmission rod 150, and the end face of the transmission gear 151 is drivenly connected to the rotating shaft of the reflector bracket 210.

[0054] Specifically, such as Figure 2 As shown, the transmission rod 150 is perpendicularly connected to the second support plate 115. The transmission gear 151 is sleeved on the transmission rod 150 and can mesh with the teeth of the worm gear 132 to achieve rotation. The side of the transmission gear 151 facing away from the second support plate 115 is driven to the rotating shaft of the reflector bracket 210. When the transmission gear 151 rotates clockwise or counterclockwise, it can drive the rotating shaft to rotate together, thereby causing the reflector bracket 210 to rotate around the axis of the rotating shaft. This arrangement makes the transmission process more reliable and stable.

[0055] Another aspect of the embodiments of this application, such as Figure 4 As shown, a head-up display 200 is provided, including a reflector bracket 210 and a motor assembly 100; the reflector bracket 210 includes a frame and a rotating shaft disposed on one side of the frame; the motor assembly 100 includes a motor body 110 and a worm gear 130, the worm gear 130 is connected to the output end of the motor body 110, and the motor body 110 drives the rotating shaft through the worm gear 130 to drive the frame to rotate along the axis of the rotating shaft.

[0056] Specifically, the head-up display 200 includes a housing 220, with a motor assembly 100 housed within the housing 220 to provide some protection for the motor assembly 100. A reflector is mounted on the frame of the reflector bracket 210. An electric motor drives a worm gear 130 to rotate along its axis, thereby rotating the frame along its axis to adjust the reflector angle. The specific structure and beneficial effects of the motor assembly 100 have been described in detail above and will not be repeated here. The reflector bracket 210 of the head-up display 200 exhibits good stability and accuracy when flipped, while also extending its service life.

[0057] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. An electric machine assembly, characterized by The device includes a motor body (110), a motor bracket (120), a worm gear (130), and an elastic element (140). The motor bracket (120) includes a first mounting plate (111) and a second mounting plate (112) arranged at relative intervals, and the first mounting plate (111) and the second mounting plate (112) are connected by a first support plate (113). One end of the elastic element (140) abuts against the first mounting plate (111), and the other end abuts against the second mounting plate (112). The worm gear (130) is connected to the output end of the motor body (110), and the motor body (110) is located on the side of the second mounting plate (112) away from the first mounting plate (111). The worm gear (130) passes through the second mounting plate (112), the elastic element (140), and the first mounting plate (111) in sequence. The worm gear (130) is used to drive the reflector bracket (210) of the head-up display (200) to rotate.

2. The electric machine assembly of claim 1, wherein, The elastic element (140) includes a first abutting plane (141), a second abutting plane (142), and a connecting plate (143); the first abutting plane (141) abuts against and fits against the first assembly plate (111), and the second abutting plane (142) abuts against and fits against the second assembly plate (112); the two sides of the connecting plate (143) are respectively connected to the first abutting plane (141) and the second abutting plane (142).

3. The motor assembly according to claim 2, characterized in that, There are two of each of the second abutting plane (142) and the connecting plate (143), with the two second abutting planes (142) spaced apart; the two connecting plates (143) are respectively connected to the opposite sides of the first abutting plane (141).

4. The motor assembly according to claim 2, characterized in that, The second abutting plane (142) is provided with a positioning hole (1421), and a first limiting wall (1422) is provided around the periphery of the positioning hole (1421); the second assembly plate (112) is provided with an assembly hole corresponding to the positioning hole (1421), and a second limiting wall (1121) is provided around the periphery of the assembly hole; the first limiting wall (1422) can be sleeved on the outer wall of the second limiting wall (1121).

5. The motor assembly according to claim 3, characterized in that, The connecting plate (143) is provided with at least one bending portion (1431) along the elastic direction of the elastic member (140).

6. The motor assembly according to claim 2, characterized in that, The motor bracket (120) further includes a third assembly plate (114), which is arranged parallel to the first assembly plate (111) at a distance; the third assembly plate (114) and the first assembly plate (111) are connected by a second support plate (115); the worm gear (130) passes through the second assembly plate (112), the elastic element (140), the first assembly plate (111) and the third assembly plate (114) in sequence.

7. The motor assembly according to claim 6, characterized in that, The second support plate (115) is vertically disposed on one side of the first assembly plate (111), and the first support plate (113) is vertically disposed on the other side of the assembly plate; the first abutting plane (141) of the elastic member (140) is vertically disposed on the side of the second support plate (115) with a limiting plate (144), and the limiting plate (144) can be attached to the outer wall of the second support plate (115).

8. The motor assembly according to claim 1, characterized in that, The worm gear (130) includes a shaft (131) and a worm wheel (132) sleeved on the outer wall of the shaft (131). The worm wheel (132) has multiple helical teeth along the shaft (131) as the axis. The motor assembly (100) also includes a transmission gear (151) that meshes with the helical teeth. The worm gear (130) drives the reflector bracket (210) of the head-up display (200) to rotate through the transmission gear (151).

9. The motor assembly according to claim 8, characterized in that, The motor bracket (120) is provided with a transmission rod (150), the extension direction of which is perpendicular to the extension direction of the worm gear (130); the transmission gear (151) is rotatably mounted on the transmission rod (150), and the end face of the transmission gear (151) is driven to be connected to the rotating shaft of the reflector bracket (210).

10. A heads-up display, characterized in that, The device includes a reflector bracket (210) and a motor assembly (100) as described in any one of claims 1-9; the reflector bracket (210) includes a frame and a rotating shaft disposed on one side of the frame; the motor assembly (100) includes a motor body (110) and a worm gear (130), the worm gear (130) being connected to the output end of the motor body (110), and the motor body (110) driving the rotating shaft through the worm gear (130) to rotate the frame along the axis of the rotating shaft.

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