Electronic mechanical brake and vehicle with same

Abstract

The utility model provides an electronic mechanical brake and a vehicle with the same, the electronic mechanical brake comprises a brake caliper body, the brake caliper body is provided with a brake block, and the brake block is used for braking a brake disc of the vehicle; the driving mechanism comprises a driving motor, a transmission mechanism, a lead screw and a lead screw nut, the lead screw extends in the first direction, the brake block is fixed to one end of the lead screw, the lead screw nut is arranged on the outer side of the lead screw in a sleeving mode, the driving motor is connected with the lead screw nut through the transmission mechanism, and the lead screw nut is connected with the transmission mechanism. And the motor is used for driving the lead screw nut to rotate so as to drive the lead screw to move in the first direction. According to the electronic mechanical brake, the lead screw is driven through the lead screw nut, the overall size of the electronic mechanical brake can be effectively reduced, the electronic mechanical brake can be conveniently installed, meanwhile, the universality of the electronic mechanical brake can be effectively improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle manufacturing technical field especially electronic mechanical brake and vehicle with it. BACKGROUND

[0002] The electronic mechanical brake in prior art is large in size, and interference with adjacent structures is prone to occur during installation of the electronic mechanical brake, thus increasing the difficulty of installation of the electronic mechanical brake, and further hindering the installation of the electronic mechanical brake. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved. To this end, the utility model provides an electronic mechanical brake, which can facilitate the installation of the electronic mechanical brake.

[0004] The utility model further provides a vehicle with the electronic mechanical brake.

[0005] According to the electronic mechanical brake of the first aspect of the utility model, the brake block is fixed to one end of the lead screw, and the lead screw nut is sleeved on the outside of the lead screw, and the drive motor is connected with the lead screw nut through the transmission mechanism, which is used to drive the rotation of the lead screw nut to drive the movement of the lead screw in the first direction.

[0006] According to the electronic mechanical brake of the utility model, the lead screw is driven by the lead screw nut, which can effectively reduce the overall size of the electronic mechanical brake, and facilitate the installation of the electronic mechanical brake, and effectively improve the versatility of the electronic mechanical brake and reduce the production cost.

[0007] According to some embodiments of the utility model, the transmission mechanism comprises a first gear coaxially fixed with the lead screw nut, a drive gear sleeved and fixed on the motor shaft of the drive motor, and the drive gear is in transmission connection with the first gear.

[0008] According to some optional embodiments of the utility model, the transmission mechanism further comprises a transmission shaft extending in the first direction, the transmission shaft, the motor shaft and the lead screw are arranged in parallel and spaced apart in the second direction, and the second direction is perpendicular to the first direction, a second gear sleeved on the transmission shaft and engaged with the drive gear, and a third gear sleeved on the transmission shaft and engaged with the first gear.

[0009] According to some optional embodiments of the present application, the second gear is arranged on one side of the lead screw in the first direction, the first gear is sleeved and fixed on the outer circumferential surface of the lead screw nut, and the third gear is opposite to the first gear in the second direction.

[0010] According to some embodiments of the present application, in the first direction, the driving motor is located on one side of the second gear facing the first gear.

[0011] According to some embodiments of the present application, the third gear is integrally formed with the transmission shaft.

[0012] According to some embodiments of the present application, the electronic mechanical brake comprises a housing, a mounting cavity is formed in the housing, and the driving mechanism is arranged in the mounting cavity.

[0013] According to some optional embodiments of the present application, the housing comprises a first housing and a second housing, the first housing and the second housing are butted and matched along the first direction to define the mounting cavity, and the brake caliper body is fixed on one side of the second housing away from the first housing.

[0014] According to some embodiments of the present application, the electronic mechanical brake comprises bearings, the bearings are arranged in the mounting cavity and fixed with the housing, the lead screw nut is arranged and supported on the radial inner side of the bearings, and the number of bearings is multiple, and the multiple bearings are arranged in intervals in the axial direction of the lead screw nut.

[0015] According to some embodiments of the present application, the electronic mechanical brake comprises a heat dissipation cover, the heat dissipation cover is fixed on the housing and located on one side of the housing away from the brake caliper body.

[0016] According to some embodiments of the present application, the brake caliper body further comprises a fixed block, the fixed block and the brake block are arranged in intervals along the first direction, and the brake block is adapted to cooperate with the fixed block to clamp the brake disc.

[0017] The vehicle according to the second aspect of the present application comprises the electronic mechanical brake according to the first aspect of the present application.

[0018] According to the vehicle of the present application, by arranging the electronic mechanical brake of the first aspect of the present application, the overall volume of the electronic mechanical brake can be effectively reduced by driving the lead screw with the lead screw nut, thereby facilitating the installation of the electronic mechanical brake, and the versatility of the electronic mechanical brake can be effectively improved, and the production cost can be reduced.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of an electromechanical brake according to an embodiment of the present application.

[0021] REFERENCE NUMERALS

[0022] 100, electromechanical brake;

[0023] 10, brake caliper body; 11, brake pad; 12, fixed block;

[0024] 20, driving mechanism; 21, driving motor; 211, motor shaft; 22, transmission mechanism; 221, first gear; 222, driving gear; 223, transmission shaft; 224, second gear; 225, third gear; 23, lead screw; 24, lead screw nut;

[0025] 30, housing; 31, first housing; 32, second housing;

[0026] 40, bearing;

[0027] 50, heat dissipation cover;

[0028] 60, bracket. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Figure 1 Description of an electromechanical brake 100 according to an embodiment of the present application.

[0031] Referring to Figure 1 , the electromechanical brake 100 according to an embodiment of the present application comprises a brake caliper body 10 and a driving mechanism 20.

[0032] Specifically, the brake caliper body 10 is provided with a brake pad 11, and the brake pad 11 is used to brake the brake disc of the vehicle; the driving mechanism 20 comprises a driving motor 21, a transmission mechanism 22, a lead screw 23 and a lead screw nut 24, the lead screw 23 extends along a first direction (such as the up-down direction shown in the figure), and the brake pad 11 is fixed to one end of the lead screw 23 (such as the left end shown in the figure). Figure 1 Figure 1 ​The lower end of the lead screw 23 shown is shown. The lead screw nut 24 is sleeved on the outside of the lead screw 23. The drive motor 21 is connected to the lead screw nut 24 through the transmission mechanism 22 and is used to drive the lead screw nut 24 to rotate so as to drive the lead screw 23 to move in the first direction.

[0033] For example, such as Figure 1 As shown, brake block 11 clamps the brake disc, stopping the wheel from rotating; brake block 11 releases the brake disc, allowing the wheel to rotate. Lead screw 23 extends vertically, with brake block 11 fixed to its lower end. Lead screw nut 24 is sleeved on the outside of lead screw 23. Drive motor 21 is connected to transmission mechanism 22, which in turn is connected to lead screw nut 24. Lead screw nut 24 is connected to lead screw 23, thus enabling drive motor 21 to drive lead screw 23 to move vertically. Preferably, ball bearings are provided between lead screw 23 and lead screw nut 24, thereby converting the lateral force of lead screw nut 24's rotation into the axial force of lead screw 23's movement.

[0034] When the electromechanical brake 100 is used to brake the brake disc of the vehicle, the drive motor 21 runs, the drive motor 21 drives the transmission mechanism 22, the transmission mechanism 22 drives the lead screw nut 24 to rotate, the lead screw nut 24 drives the lead screw 23 to rotate, and the lead screw 23 drives the brake block 11 at the lower end of the lead screw 23 to move downward until the brake block 11 clamps the brake disc, thereby braking the vehicle.

[0035] The electromechanical brake 100 of this invention drives the lead screw 23 via the lead screw nut 24. Since the lead screw 23 is located inside the lead screw nut 24, it moves within the lead screw nut 24 without requiring additional space inside the electromechanical brake 100. Compared to the prior art where the lead screw 23 drives the lead screw nut 24, the required movement space for the lead screw nut 24 is greater than that for the lead screw 23. Therefore, this application uses a drive method where the lead screw nut 24 drives the lead screw 23, eliminating the need to consider the movement space required for the lead screw nut 24. This effectively reduces the overall size of the electromechanical brake 100, facilitating its installation. Furthermore, it effectively prevents interference between the electromechanical brake 100 and adjacent structures. For example, it avoids interference between the electromechanical brake 100 and the lower control arm of the shock absorber, or interference between the electromechanical brake 100 and the front wheel drive shaft. This significantly improves the versatility of the electromechanical brake 100, eliminating the need for development for a single vehicle model and reducing production costs.

[0036] In addition, the driving form of the drive motor 21 driving the brake block 11 has the characteristics of fast response time and high response accuracy, which can effectively improve active safety performance and braking efficiency, and thus effectively improve the driving safety of the vehicle.

[0037] According to the embodiment of the utility model, the overall volume of the electromechanical brake 100 can be effectively reduced by driving the lead screw 23 through the lead screw nut 24, thereby facilitating the installation of the electromechanical brake 100, and the versatility of the electromechanical brake 100 can be effectively improved, and the production cost can be reduced.

[0038] According to some embodiments of the utility model, referring to Figure 1 , the transmission mechanism 22 comprises a first gear 221 and a driving gear 222. The first gear 221 is coaxially fixed with the lead screw nut 24; the driving gear 222 is sleeved and fixed on the motor shaft 211 of the driving motor 21, and the driving gear 222 is in transmission connection with the first gear 221. Thus, the transmission mechanism 22 can drive the lead screw nut 24 through the first gear 221, so that the driving motor 21 can drive the lead screw nut 24 to rotate, and the driving motor 21 is provided with the driving gear 222, so that the rotating force of the motor shaft 211 of the driving motor 21 can be transmitted to the transmission mechanism 22, thereby ensuring that the driving motor 21 can normally drive the transmission mechanism 22.

[0039] For example, as shown in Figure 1 , the motor shaft 211 of the driving motor 21 is provided with the driving gear 222, the radial outer side of the lead screw nut 24 is provided with the first gear 221, and the driving gear 222 is in transmission connection with the first gear 221, so as to realize that the driving motor 21 drives the lead screw nut 24 to rotate through the driving gear 222 and the first gear 221.

[0040] According to some optional embodiments of the utility model, referring to Figure 1 , the transmission mechanism 22 further comprises a transmission shaft 223, a second gear 224 and a third gear 225. Specifically, the transmission shaft 223 extends along a first direction (such as the up-down direction shown in Figure 1 , the transmission shaft 223, the motor shaft 211 and the lead screw 23 are arranged in parallel and are arranged at intervals in a second direction (such as the left-right direction shown in Figure 1 , the second direction is perpendicular to the first direction; the second gear 224 is sleeved on the transmission shaft 223 and is in meshing with the driving gear 222; and the third gear 225 is sleeved on the transmission shaft 223 and is in meshing with the first gear 221.

[0041] Thus, the transmission shaft 223 is arranged, the driving motor 21 can drive the first gear 221 to rotate through the driving gear 222 and the transmission shaft 223, without directly connecting the driving gear 222 and the first gear 221, so that the transmission ratio between the driving gear 222 and the first gear 221 can be adjusted, and the connection between the driving gear 222 and the first gear 221 can be facilitated, and meanwhile, the parallel arrangement of the transmission shaft 223, the motor shaft 211 and the lead screw 23 can ensure that the transmission shaft 223, the motor shaft 211 and the lead screw 23 can be connected through parallel gear transmission, so that the power transmission between the transmission shaft 223, the motor shaft 211 and the lead screw 23 can be facilitated. In addition, the second gear 224 is arranged, the connection between the transmission shaft 223 and the driving gear 222 can be facilitated, so that the driving gear 222 can transmit power to the transmission shaft 223, and the third gear 225 is arranged, the connection between the transmission shaft 223 and the first gear 221 can be facilitated, so that the transmission shaft 223 can transmit power to the lead screw nut 24.

[0042] For example, as shown in Figure 1 , the transmission shaft 223 extends along the up-down direction, the transmission shaft 223, the motor shaft 211 and the lead screw 23 are arranged in parallel, and the transmission shaft 223 is located between the motor shaft 211 and the lead screw 23, the second gear 224 and the third gear 225 are arranged on the transmission shaft 223, the second gear 224 is engaged with the driving gear 222, and the third gear 225 is engaged with the first gear 221.

[0043] According to some optional embodiments of the utility model, referring to Figure 1 , the second gear 224 is arranged on one side (such as the upper side of the lead screw 23, as shown in Figure 1 ) of the lead screw 23 in the first direction (such as the up-down direction, as shown in Figure 1 ), the first gear 221 is sleeved and fixed on the outer circumferential surface of the lead screw nut 24, and the third gear 225 is opposite to the first gear 221 in the second direction (such as the left-right direction, as shown in Figure 1 ).

[0044] Thus, the second gear 224 is arranged at the end of the lead screw 23, the engagement connection between the second gear 224 and the driving gear 222 can be facilitated, so that the motor shaft 211 can drive the transmission shaft 223, and meanwhile, the interference between the second gear 224 and one end of the lead screw 23 can be avoided, so that the normal rotation of the second gear 224 can be ensured. In addition, the third gear 225 is arranged at a reasonable position, compared with the scheme that the second gear 224 and the third gear 225 are arranged in parallel on one side of the motor shaft 211 in the second direction in the prior art, the length of the electromechanical brake 100 in the second direction can be reduced, so that the overall volume of the electromechanical brake 100 can be reduced, and thus the installation of the electromechanical brake 100 can be facilitated.

[0045] For example, as shown in Figure 1 , the second gear 224 is arranged at the upper end of the transmission shaft 223 and on the upper side of the lead screw 23, the third gear 225 is arranged on the lower side of the second gear 224, the first gear 221 is sleeved on the outer peripheral surface of the lead screw nut 24, and the second gear 224 and the third gear 225 are opposite in the left-right direction.

[0046] According to some embodiments of the utility model, referring to Figure 1 , in the first direction (such as the up-down direction shown in Figure 1 ), the driving motor 21 is located on the side of the second gear 224 facing the first gear 221 (such as the lower side of the second gear 224 shown in Figure 1 ). Therefore, the driving motor 21 is reasonably arranged, so that the occupied space of the driving motor 21 in the first direction can be minimized, and thus the overall volume of the electromechanical brake 100 can be reduced. In addition, the overall weight of the electromechanical brake 100 can also be reduced, so that the installation of the electromechanical brake 100 can be further facilitated. For example, as shown in Figure 1 , the driving motor 21 is located on the lower side of the second gear 224.

[0047] According to some embodiments of the utility model, referring to Figure 1 , the third gear 225 is integrally formed with the transmission shaft 223. Therefore, the connection strength between the third gear 225 and the transmission shaft 223 can be ensured, the rotation of the third gear 225 relative to the transmission shaft 223 can be effectively prevented, and at the same time, the overall structural strength of the third gear 225 and the transmission shaft 223 can be improved, and damage to the third gear 225 and the transmission shaft 223 can be effectively prevented.

[0048] According to some embodiments of the utility model, referring to Figure 1 , the electromechanical brake 100 comprises a housing 30, an installation cavity is formed in the housing 30, and the driving mechanism 20 is arranged in the installation cavity. Therefore, the housing 30 can protect the driving mechanism 20, so that dust or liquid from the outside can be prevented from entering the installation cavity and affecting the driving mechanism 20, and thus the service life of the driving mechanism 20 can be ensured, and rust damage to the driving mechanism 20 can be effectively prevented.

[0049] According to some optional embodiments of the utility model, referring to Figure 1 , the housing 30 comprises a first housing 31 and a second housing 32, the first housing 31 and the second housing 32 are butted and matched in the first direction (such as the up-down direction shown in Figure 1 ) to define the installation cavity, and the brake caliper body 10 is fixed to the side of the second housing 32 away from the first housing 31 (such as the lower side of the second housing 32 shown in Figure 1 ).

[0050] In this way, the first shell 31 and the second shell 32 cooperatively define the mounting cavity, and this arrangement is simple in structure and convenient to assemble, and meanwhile, the driving structure can be conveniently mounted in the shell 30. In addition, the brake caliper body 10 is reasonably arranged, and the brake caliper body 10 does not occupy the space in the mounting cavity, so that the volume of the shell 30 can be reduced, and the processing of the shell 30 is facilitated.

[0051] For example, as shown in Figure 1 , the first shell 31 and the second shell 32 are butted in the up-down direction and cooperatively define the mounting cavity, and the brake caliper body 10 is located at the lower side of the second shell 32.

[0052] According to some optional embodiments of the present application, referring to Figure 1 , the electromechanical brake 100 further comprises: a bearing 40, the bearing 40 is arranged in the mounting cavity and fixed to the shell 30, and the lead screw nut 24 is arranged on and supported by the radially inner side of the bearing 40, and the number of bearings 40 is multiple, that is, the number of bearings 40 can be two, three or four or more, and the multiple bearings 40 are arranged in the axial direction of the lead screw nut 24.

[0053] In this way, the bearing 40 can ensure the stability of the rotation of the lead screw nut 24, so as to avoid eccentric rotation of the lead screw nut 24, and meanwhile, the multiple bearings 40 can provide support at multiple points in the axial direction of the lead screw nut 24, so as to further ensure the stability of the rotation of the lead screw nut 24.

[0054] For example, as shown in Figure 1 , the bearing 40 is sleeved on the outer circumferential surface of the lead screw nut 24, and the inner and outer side walls in the radial direction of the bearing 40 abut on the lead screw nut 24 and the second shell 32 respectively, and the number of bearings 40 is two, and the two bearings 40 are located on both sides of the first gear 221 in the up-down direction, so as to ensure the stability of the rotation of the lead screw nut 24.

[0055] According to some embodiments of the present application, referring to Figure 1 , the electromechanical brake 100 further comprises: a heat dissipation cover 50, the heat dissipation cover 50 is fixed to the shell 30 and located at the side of the shell 30 away from the brake caliper body 10 (for example, the upper side of the shell 30 as shown in Figure 1 ). In this way, the heat dissipation cover 50 can dissipate heat for the driving motor 21, so as to effectively prevent the driving motor 21 from being damaged by high temperature, and further to ensure the service life of the driving motor 21. For example, as shown in Figure 1 , the heat dissipation cover 50 is fixed to the first shell 31 and located at the upper side of the first shell 31.

[0056] According to some embodiments of the present application, referring to Figure 1 , the brake caliper body 10 can further comprise: a fixed block 12, the fixed block 12 and the brake block 11 are arranged in the first direction (for example, the left-right direction as shown inFigure 1 The brake blocks 11 are adapted to cooperate with the fixed blocks 12 to clamp the brake disc. Thus, the fixed blocks 12 cooperate with the brake blocks 11 to clamp the brake disc, so that the electronic mechanical brake 100 can brake the brake disc.

[0057] For example, as shown in Figure 1 The fixed blocks 12 are fixed in the brake caliper body 10, the fixed blocks 12 are arranged in the up-down direction with the brake blocks 11, and the fixed blocks 12 are located on the lower side of the brake blocks 11.

[0058] Further, as shown in Figure 1 The electronic mechanical brake 100 further comprises a bracket 60 connected with the shell 30, and the bracket 60 is adapted to be fixed with the wheel hub of the vehicle. Thus, the electronic mechanical brake 100 can be fixed on the vehicle through the bracket 60, so that the fixation of the electronic mechanical brake 100 can be facilitated.

[0059] According to the vehicle of the second aspect of the utility model, referring to Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 , the electronic mechanical brake 100 of the first aspect of the utility model is included.

[0060] According to the vehicle of the embodiment of the utility model, by setting the electronic mechanical brake 100 of the first aspect of the utility model, the overall volume of the electronic mechanical brake 100 can be effectively reduced by driving the lead screw 23 through the lead screw nut 24, and then the installation of the electronic mechanical brake 100 can be facilitated, and the versatility of the electronic mechanical brake 100 can be effectively improved, and the production cost can be reduced.

[0061] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, structure and operation, therefore it cannot be understood as a limitation of the utility model.

[0062] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0063] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electromechanical brake (100), characterized by, The brake caliper body (10) is provided with a brake block (11) for braking a brake disc of a vehicle. The drive mechanism (20) comprises a drive motor (21), a transmission mechanism (22), a lead screw (23) and a lead screw nut (24), the lead screw (23) extends in a first direction, the brake block (11) is fixed to one end of the lead screw (23), the lead screw nut (24) is sleeved on the outside of the lead screw (23), the drive motor (21) is connected with the lead screw nut (24) through the transmission mechanism (22), and the drive motor (21) is used to drive the lead screw nut (24) to rotate, so as to drive the lead screw (23) to move in the first direction. The transmission mechanism (22) comprises: A first gear (221) is coaxially fixed with the lead screw nut (24); A drive gear (222) is sleeved and fixed on a motor shaft (211) of the drive motor (21), and the drive gear (222) is in transmission connection with the first gear (221). The transmission mechanism (22) further comprises:

2. The electromechanical brake (100) according to claim 1, characterized in that A transmission shaft (223) extends in a first direction, the transmission shaft (223), the motor shaft (211) and the lead screw (23) are arranged in parallel and are spaced apart in a second direction, and the second direction is perpendicular to the first direction; A second gear (224) is sleeved on the transmission shaft (223) and is in meshing connection with the drive gear (222); A third gear (225) is sleeved on the transmission shaft (223) and is in meshing connection with the first gear (221). The second gear (224) is arranged on one side of the lead screw (23) in the first direction, the first gear (221) is sleeved and fixed on the outer circumferential surface of the lead screw nut (24), and the third gear (225) is opposite to the first gear (221) in the second direction.

3. The electromechanical brake (100) according to claim 2, characterized in that In the first direction, the drive motor (21) is located on the side of the second gear (224) facing the first gear (221).

4. The electromechanical brake (100) of claim 2, wherein, The third gear (225) is integrally formed with the transmission shaft (223).

5. The electromechanical brake (100) of claim 2, wherein, The housing (30) comprises:

6. The electromechanical brake (100) according to any one of claims 1-5, characterized in that, A housing (30) is formed in an installation cavity, and the drive mechanism (20) is arranged in the installation cavity. The housing (30) comprises a first housing (31) and a second housing (32), the first housing (31) and the second housing (32) are butted and matched in the first direction to define the installation cavity, and the brake caliper body (10) is fixed to the side of the second housing (32) away from the first housing (31).

7. The electromechanical brake (100) of claim 6, characterized in that The housing (30) comprises:

8. The electromechanical brake (100) of claim 6, wherein, ​ A bearing (40) is arranged in the mounting cavity and fixed with the housing (30), the lead screw nut (24) is arranged in and supported by the radial inner side of the bearing (40), and the number of the bearings (40) is multiple, and the multiple bearings (40) are arranged in the axial direction of the lead screw nut (24) in intervals.

9. The electromechanical brake (100) of claim 6, wherein, Comprising: A heat dissipation cover (50) is fixed on the housing (30) and located on the side of the housing (30) away from the brake caliper body (10).

10. The electromechanical brake (100) of claim 1, wherein, The brake caliper body (10) further comprises a fixed block (12) arranged in the first direction in intervals with the brake block (11), and the brake block (11) is adapted to cooperate with the fixed block (12) to clamp the brake disc.

11. A vehicle characterized by comprising: The electronic mechanical brake (100) according to any one of claims 1-10.

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