Brake device and vehicle comprising same

Abstract

A brake device includes: a caliper body; the brake pad is mounted on one side of the caliper body; a mounting portion formed inside the caliper body; and a pad urging unit located in the mounting portion and configured to press one surface of the brake pad. The sheet pushing unit includes: a rotating medium that rotates; a conversion assembly engaged with the rotating medium and converting a rotational motion into a linear motion together with the rotating medium; and a piston formed to surround one side of the conversion assembly. The brake device can ensure braking performance by reducing the total length of the caliper body while reducing manufacturing cost.

Description

Technical Field

[0001] The present disclosure relates to a braking device suitable for a vehicle and a vehicle including the same, and more particularly, to a braking device for reducing the total length of a caliper body and a vehicle including the same. Background Art

[0002] A braking device installed in a vehicle is a device for decelerating, stopping, or maintaining a stopped state of the vehicle while driving. It is located inside a rotating wheel and brakes the vehicle by pressing a disc-shaped brake disc rotating with the wheel from both sides using brake pads.

[0003] In a general braking device, one brake pad is usually pushed by one piston to press the brake disc, but there are also cases where two or more pistons push the brake pad.

[0004] Therefore, since the caliper body should include an internal space for accommodating the piston and the piston driving member, the total length of the caliper body should be ensured, and the caliper body requires a certain volume and weight. This is directly related to the manufacturing cost of the braking device.

[0005] In addition, when the brake pad is pushed by the piston, it is important to press the brake pad evenly for braking performance. Since the pressure is more evenly distributed over the entire surface of the brake pad, the brake pad can apply pressure to the brake disc more evenly. In other words, preventing uneven wear of the brake pad can reduce the possibility of piston damage and prevent a decline in braking performance.

[0006] Therefore, an improved technique is needed to improve the performance of the braking device while reducing the total length of the caliper body. Summary of the Invention

[0007] Accordingly, the present disclosure relates to a braking device and a vehicle including the same, which substantially eliminates one or more problems caused by the limitations and disadvantages of the related art.

[0008] One aspect of the present disclosure provides a braking device and a vehicle including the same, and more particularly, provides a braking device and a vehicle including the same that ensure braking performance while reducing the manufacturing cost by reducing the total length of the caliper body.

[0009] Another aspect of the present disclosure provides a braking device and a vehicle including the same that increase the surface pressure of the brake pad by evenly distributing pressure on one surface of the brake pad.

[0010] The object to be achieved by the present disclosure is not limited to the above-described content, and those skilled in the art will more clearly understand other objects not described herein through the following detailed description.

[0011] According to one aspect of the present disclosure, a braking device includes: a caliper body; a brake pad mounted on one side of the caliper body; a mounting portion formed inside the caliper body; and a pad propulsion unit located in the mounting portion and configured to press one surface of the brake pad. The pad propulsion unit includes: a rotating medium that rotates; a conversion assembly that engages with the rotating medium and converts the rotational motion into linear motion together with the rotating medium; and a piston formed to surround one side of the conversion assembly.

[0012] The conversion assembly may include: a ball nut coupled to the rotating medium and rotating together with the rotating medium; and a ball screw passing through the rotating medium and the ball nut and moving forward or backward by the rotation of the ball nut.

[0013] The conversion assembly may include a ball bearing mounted on an outer circumferential surface of the ball nut.

[0014] The ball nut may include a contact portion formed to protrude from the outer circumferential surface of the ball nut and contact the ball bearing.

[0015] The ball screw may include a head having a curved surface on one side thereof, and the piston may include a connection surface having a curved surface formed to correspond to the curved surface of the head.

[0016] A gap may be formed between one side of the head and one side of the connection surface.

[0017] The conversion assembly may include an annular seal portion coupled to an outer circumferential surface of the head, and the piston may include an insertion groove formed to allow the seal portion to be inserted therein.

[0018] The ball screw may include at least one anti-rotation groove formed therein, and the at least one anti-rotation groove may have a polygonal shape.

[0019] The piston may include at least two pressing portions symmetrically spaced apart from each other in a left-right direction or an up-down direction with respect to the center of the conversion assembly.

[0020] According to another aspect of the present disclosure, a vehicle includes: a body; a wheel located below the body and rotating; a brake disc coupled to the wheel and rotating together with the wheel; a caliper body into which one end of the brake disc is inserted; a brake pad mounted on one side of the caliper body, one surface of the brake pad facing the brake disc; a mounting portion formed inside the caliper body; and a pad propulsion unit located in the mounting portion and configured to press one surface of the brake pad. The pad propulsion unit includes: a rotating medium that rotates; a conversion assembly that engages with the rotating medium and converts the rotational motion into linear motion together with the rotating medium; and a piston formed to surround one side of the conversion assembly.

[0021] The braking device according to the present disclosure and a vehicle including the same can ensure braking performance while reducing manufacturing costs by reducing the total length of the caliper body.

[0022] In addition, by evenly distributing pressure on one surface of the brake pad, the surface pressure of the brake pad can be improved.

[0023] The effects achievable by the present disclosure are not limited to the effects specifically described above, and those skilled in the art will more clearly understand other advantages not described herein through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present disclosure, are incorporated in and constitute a part of this application, show embodiments of the present disclosure, and together with the description are used to explain the principles of the present disclosure. In the drawings:

[0025] Figure 1 is a front view showing a braking device and a brake disc according to an embodiment of the present disclosure;

[0026] Figure 2 is a perspective view showing a braking device according to an embodiment of the present disclosure;

[0027] Figure 3 is a bottom view showing a braking device according to an embodiment of the present disclosure;

[0028] Figure 4 is a detailed side view showing a pad pushing unit in a braking device according to an embodiment of the present disclosure;

[0029] Figure 5 and Figure 6 is a schematic diagram for describing the driving of a pad pushing unit in a braking device according to an embodiment of the present disclosure;

[0030] Figure 7 is a schematic diagram showing an anti-rotation groove formed in a ball screw in a braking device according to an embodiment of the present disclosure; and

[0031] Figures 8 to 11 is a schematic diagram showing various embodiments of a piston in a braking device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] A detailed description will now be given with reference to the accompanying drawings according to the exemplary embodiments disclosed herein. Identical or equivalent components may have the same reference numerals, and their descriptions will not be repeated. As used herein, the suffixes "module" and "component" may be added or used interchangeably for the convenience of writing this specification, and do not imply different meanings or functions. When describing the embodiments disclosed in this specification, related well-known technologies may not be described in detail so as not to obscure the subject matter of the embodiments disclosed in this specification. In addition, it should be noted that the drawings are only for easily understanding the embodiments disclosed in this specification and should not be construed as limiting the technical spirit disclosed in this specification. Therefore, the present disclosure should be construed as extending to any changes, equivalents, and alternatives other than those specifically listed in the drawings.

[0033] Although the terms first, second, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another.

[0034] It can be understood that when an element is referred to as being "connected" to another element, the element can be directly connected to other elements, or there may also be intermediate elements. In contrast, it can be understood that when an element is referred to as being "directly connected" to another element, there are no intermediate elements.

[0035] The singular representation may include the plural representation unless it represents a completely different meaning from the context.

[0036] The terms used herein (such as "including" or "having", etc.) are intended to indicate the features, numbers, steps, operations, elements, components, or combinations thereof used in the following description, and thus it should be understood that the possibility of the existence or addition of one or more different features, numbers, steps, operations, elements, components, or combinations thereof is not excluded.

[0037] Figure 1 is a front view showing a braking device 1000 and a brake disc 10 according to an embodiment of the present disclosure. Figure 2 is a perspective view showing a braking device 1000 according to an embodiment of the present disclosure. Figure 3 is a bottom view showing a braking device 1000 according to an embodiment of the present disclosure.

[0038] Hereinafter, when describing the braking device 1000 according to an embodiment of the present disclosure, the left - right direction will be described based on the X - axis direction, the front - rear direction will be described based on the Y - axis direction, and the up - down direction will be described based on the Z - axis direction.

[0039] The wheels of a vehicle are generally arranged on the left and right, Figure 1 The front direction shown may be arranged to face the outside of the vehicle. Refer to Figure 1 and Figure 2, the braking device 1000 according to the present disclosure may be a device that brakes a vehicle by pressing a brake disc 10 of the vehicle with a brake pad 1200. During vehicle travel, the brake disc 10 may rotate together with the wheel, and when the braking device 1000 applies pressure to the brake disc 10, the braking device 1000 may reduce the rotational speed of the wheel by applying resistance to the rotation of the braking device 1000.

[0040] Referring to Figure 2 and Figure 3 , the braking device 1000 according to an embodiment of the present disclosure may include a caliper body 1100, a brake pad 1200, and a pad pushing unit 1300. In addition, the braking device 1000 according to the present disclosure may further include a pad carrier 1400 and a connecting pin 1500.

[0041] The caliper body 1100 may be a main body to which the components of the braking device 1000 can be connected. The caliper body 1100 may be set to a shape similar to the shape of " " such that a part of the brake disc 10 can be disposed in the recessed area. The caliper body 1100 may have a brake pad 1200 disposed therein such that the caliper body 1100 can press both sides of the brake disc 10. In addition, the pad pushing unit 1300 that presses one surface of the brake pad 1200 may be installed in the caliper body 1100.

[0042] The material and shape of the caliper body 1100 may be determined in various ways by considering the positions of other components, loads, etc. Preferably, the material of the caliper body 1100 may include a metal-based material. The caliper body 1100 may be made of a metal-based material having an appropriate porosity to support the reaction force against the braking clamping force.

[0043] The pad carrier 1400 may be connected to the caliper body 1100 and the connecting pin 1500, and may also be connected to both sides of the brake pad 1200 to guide the movement of the brake pad 1200. The brake pad 1200 may include protrusions formed on both sides thereof, and the pad carrier 1400 may include grooves corresponding to the protrusions such that the protrusions of the brake pad 1200 can be inserted into the grooves of the pad carrier 1400.

[0044] The grooves of the pad carrier 1400 may extend in the direction in which the brake pad 1200 moves to press the brake disc 10. Therefore, the brake pad 1200 can move while the protrusions on both sides of the brake pad 1200 are guided by the pad carrier 1400.

[0045] The pad carrier 1400 can be connected to a fixed member (such as a wheel knuckle (not shown)), and the caliper body 1100 connected to the pad carrier 1400 can move while being guided in the direction of the connecting pin 1500. For example, during a braking operation, the caliper body 1100 can move by the reaction force generated when the brake pads 1200 apply pressure to the brake disc 10. The direction of the connecting pin 1500 can be parallel to the direction in which the brake pads 1200 move.

[0046] In addition, the pad carrier 1400 can be made of a metal-based material with appropriate strength to support the braking torque acting on the brake pads 1200.

[0047] The brake pads 1200 can include pads that directly contact and frictionally engage the brake disc 10, and a backing plate connected to one surface of the brake pads 1200. A plurality of brake pads 1200 can be provided. In this case, the first brake pads 1200 can press one side of the brake disc 10, and the second brake pads 1200 can press the other side of the brake disc 10. The two brake pads 1200 can be arranged to face each other with the brake disc 10 therebetween.

[0048] Although not shown in the drawings, the braking device 1000 according to an embodiment of the present disclosure can include a motor for driving the pad actuator unit 1300 and a gear unit composed of gears connected to the motor. The operation of the motor can be controlled based on an electrical signal, and when the motor operates, the rotational motion of the motor can be transmitted to the pad actuator unit 1300 through the gear unit.

[0049] The gear unit can be composed of a combination of multiple gears to transmit the rotational motion of the motor. The multiple gears can be connected to the motor gear, and the types, numbers, positions, and sizes of the multiple gears can include various structures designed by those skilled in the art. The multiple gears can be composed of a combination of various types of gears (such as spur gears, helical gears, and worm gears).

[0050] In addition, the braking device 1000 according to an embodiment of the present disclosure can include a mounting portion 1700 formed inside the caliper body 1100. The pad actuator unit 1300 can be located in the mounting portion 1700 to press one surface of the brake pads 1200.

[0051] Figure 4 is a detailed side view showing the pad actuator unit 1300 in the braking device 1000 according to an embodiment of the present disclosure. Figure 5 and Figure 6 is a schematic diagram for describing the driving of the pad actuator unit 1300 in the braking device 1000 according to an embodiment of the present disclosure. Figure 7It is a schematic diagram showing the anti-rotation groove 1322b formed in the ball screw 1322 in the braking device 1000 according to an embodiment of the present disclosure.

[0052] In the braking device 1000 according to an embodiment of the present disclosure, the piece propulsion unit 1300 may receive power from the above gear unit to press and move the brake piece 1200. The piece propulsion unit 1300 may include a rotating medium 1310, a conversion assembly 1320, and a piston 1330.

[0053] First, the rotating medium 1310 may receive power from the gear unit to rotate. The conversion assembly 1320 may include various components capable of converting the rotational motion into a linear motion together with the rotating medium 1310 and the connection mechanism between the components. For example, in the braking device 1000 according to an embodiment of the present disclosure, the conversion assembly 1320 may include a ball nut 1321, a ball screw 1322, and a ball bearing 1323.

[0054] In addition, the piston 1330 may be formed to surround one side of the conversion assembly 1320. More specifically, as Figure 4 shown, one side of the ball screw 1322 may be inserted into the piston 1330 so that the piston 1330 may linearly move together with the ball screw 1322.

[0055] The ball nut 1321 may be coupled to the rotating medium 1310 to rotate together with the rotating medium 1310. Referring to Figure 2 and Figure 3 simultaneously, the rotation axis of the ball nut 1321 may be parallel to the direction (y-axis direction) in which the brake piece 1200 moves. The ball nut 1321 may include a helical thread on its inner surface.

[0056] The ball screw 1322 may pass through the rotating medium 1310 and the ball nut 1321 and move forward or backward through the rotation of the ball nut 132l. That is, through the rotation of the ball nut 1321, the ball screw 1322 may linearly move in the direction (y-axis direction) parallel to the movement of the brake piece 1200.

[0057] In particular, the ball screw 1322 may be formed longer than the length of the ball nut 1321 to ensure the moving area for moving forward or backward (in the y-axis direction) and to cope with the wear of the brake piece 1200. Therefore, as Figure 4 shown, one end of the ball screw 1322 may protrude from one end of the ball nut 1321 by a length L2. By ensuring that the ball screw 1322 has an extra length, this allows the performance of the braking device 1000 to be maintained even if the brake piece 1200 wears in the future.

[0058] Specifically, in the braking device 1000 according to an embodiment of the present disclosure, the conversion assembly 1320 may include a ball bearing 1323 located on the outer peripheral surface of the ball nut 1321. When the ball nut 1321 rotates together with the rotating medium 1310, the ball bearing 1323 may assist the rotational movement of the ball nut 1322.

[0059] Furthermore, in the braking device 1000 according to an embodiment of the present disclosure, the ball nut 1321 may include a contact portion 1321a that is formed to protrude from the outer peripheral surface and contact the ball bearing 1323. Thus, the ball bearing 1323 is located between the contact portion 1321a and one end of the caliper body 1100 and is fixed in place.

[0060] Referring simultaneously to Figure 5 and Figure 6 , due to the advancement of the ball screw 1322, the piston 1330 moves forward, thereby generating a clamping force. Then, a reaction force F1 that resists the clamping force applied to the piston 1330 is generated, and the reaction force F1 is transmitted along the ball screw 1322 to the ball nut 1321. Then, the reaction force F1 that resists the clamping force through the contact portion 1321a can be transmitted to the caliper body 1100 through the ball bearing 1323.

[0061] That is to say, the braking device 1000 according to an embodiment of the present disclosure can transmit the reaction force F1 that resists the clamping force to the caliper body 1100 through the structure in which the contact portion 1321a of the ball nut 1321 contacts the ball bearing 1323, thereby improving the durability of the components included in the braking device 1000 of the present disclosure.

[0062] In addition, the ball bearing 1323 in the braking device 1000 according to an embodiment of the present disclosure can support the load F2 of the rotating medium 1310, the conversion assembly 1320, and the piston 1330, thereby improving the durability of the components included in the braking device 1000 of the present disclosure as described above.

[0063] Furthermore, the ball screw 1322 in the braking device 1000 according to an embodiment of the present disclosure may include a head 1322a on one side thereof, and the head 1322a includes a curved surface. The piston 1330 may include a connection surface 1331 that is formed to have a curved surface corresponding to the curved surface of the head 1322a. A gap may be formed between one side of the head 1322a and one side of the connection surface 1331.

[0064] This can allow the braking device 1000 according to an embodiment of the present disclosure to pivot in an organized manner while the head 1322a of the ball screw 1322 is inserted into the piston 1330. In particular, the gap between one side of the head 1322a and one side of the connection surface 1331 can be used to ensure an area for the organized movement of the ball screw 1322.

[0065] In addition, the conversion assembly 1320 in the braking device 1000 according to an embodiment of the present disclosure can include an annular seal portion 1324, and the annular seal portion 1324 is coupled to the outer peripheral surface of the head 1322a. The piston 1330 can be formed with an insertion groove 1332, and the seal portion 1324 is inserted into the insertion groove 1332. The head 1322a of the ball screw 1322 and the piston 1330 can be coupled through the seal portion 1324, and when the ball screw 1322 linearly moves, the piston 1330 can also linearly move together with the ball screw 1322 and press one surface of the brake pad 1200.

[0066] Therefore, the braking device 1000 according to an embodiment of the present disclosure can respond to the wear of the brake pad 1200 by referring to Figures 4 to 6 the combination and rotation of the components of the sheet propulsion unit 1300 as described above, while being able to reduce the total length L1 of the caliper body 1100.

[0067] That is to say, compared with the conventional sheet propulsion component, through the rotation structure of the ball nut 1321 and the ball bearing 1323 and the movement structure of the piston 1330 into which the ball screw 1322 is inserted and coupled, the braking device 1000 according to an embodiment of the present disclosure can reduce the lengths of the piston 1330 and the ball nut 1322, thereby reducing the total length L1 of the caliper body 1100.

[0068] In addition, the braking device 1000 according to an embodiment of the present disclosure can reduce the volume and weight of the caliper body 1100 by reducing the total length L1 of the caliper body 1100, thereby obtaining the effect of reducing the manufacturing cost of the braking device 1000.

[0069] In addition, the braking device 1000 according to an embodiment of the present disclosure can further include a protective cover 1325, and the protective cover 1325 blocks the gap between the piston 1330 and the caliper body 1100 to prevent foreign matters from being introduced from the outside.

[0070] Referring simultaneously to Figure 5 and Figure 7 , in the braking device 1000 according to an embodiment of the present disclosure, the ball screw 1322 can include at least one anti-rotation groove 1322b formed therein. The at least one anti-rotation groove 1322b can have a polygonal shape.

[0071] In one embodiment, as shown in Figure 7 (a) of Figure 7 , an anti-rotation groove 1322b may be formed at the center of the ball screw 1322, and as shown in Figure 7 (b) of Figure 7 , three anti-rotation grooves 1322b may be formed at the same distance from the center of the ball screw 1322. This is to prevent the rotation of one end of the ball screw 1322 from being coupled to another member such as an actuator by inserting a member such as a pin into the anti-rotation groove 1322b.

[0072] In addition, a member such as a pin inserted into the anti-rotation groove 1322b may be integrated or press-fitted with another member such as an actuator to support a relatively high rotational torque.

[0073] The anti-rotation groove 1322b may be formed to an appropriate depth L3 to obtain the above effects. For example, considering the lining thickness of the brake pad 1200, the anti-rotation groove 1322b may be formed to a depth of at least twice (the lining thickness (2 mm) of the brake pad).

[0074] Figures 8 to 11 is a schematic view showing various embodiments of the piston 1330 in the brake device 1000 of the present disclosure. Figure 8 is a schematic view showing the pivoting of the piston 1330 according to another embodiment of the piston 1330 in the brake device 1000 of the present disclosure, and Figure 9 is a schematic view showing the pivoting of the piston 1330 in the case where the caliper body 1100 is deformed.

[0075] As described above, when uneven wear occurs on the surface of the brake pad 1200, the pressure is not evenly distributed on the surface of the brake pad 1200. This may be a direct cause of the performance degradation of the brake device 1000 for braking a vehicle.

[0076] In addition, this problem may also occur when the caliper body 1100 is deformed. For example, as shown in Figure 9 When one side of the caliper body 1100 is bent and the piston 1330 moves linearly, the pressure may not be evenly applied to the entire surface of the brake pad 1200.

[0077] Therefore, the brake device 1000 according to an embodiment of the present disclosure can solve the above problems through various shapes of the piston 1330. That is, as shown in Figures 8 to 11 The piston 1330 may include members of various shapes into which the head 1322a of the ball screw 1322 can be inserted, and include at least two pressurizing portions 1350 symmetrically spaced apart from each other in the left-right direction (x-axis direction) or the up-down direction (z-axis direction) with respect to the center.

[0078] As described above with reference to Figure 4As described above, the piston 1330 can be pivotally organized while rotating through the connecting surface 1331 of the piston 1330 and the curved surface of the head 1322a. In addition, the pivotal area of the piston 1330 can be fixed by a gap formed between one side of the head 1322a and one side of the connecting surface 1331. Even if the brake pads 1200 are unevenly worn, this can allow the piston 1330 to press the brake pads 1200 while rotating. In addition, even if the caliper body 1100 is deformed, the piston 1330 can press the brake pads 1200 while rotating.

[0079] Therefore, the braking device 1000 according to an embodiment of the present disclosure can uniformly apply pressure to the brake pads 1200 and can additionally prevent the piston 1330 from being damaged, thereby maintaining the performance of the braking device 1000 for braking a vehicle.

[0080] Figure 10 is a detailed schematic diagram showing at least two pressing portions 1350 included in the piston 1330, and Figure 11 is a schematic diagram showing the movement of the pressing portion 1350 through the stop groove 1353 and the stop protrusion 1610.

[0081] As Figure 10 shown in (a) of, the braking device 1000 according to an embodiment of the present disclosure may include at least two pressing portions 1350 that are symmetrically spaced apart from each other in the left-right direction (x-axis direction) with respect to the center of the piston 1330. This enables the brake pads 1200 to be pressed with a uniform force.

[0082] In another embodiment of the present disclosure, as Figure 10 shown in (b) of, it may further include at least two pressing portions 1350 that are symmetrically spaced apart from each other in the up-down direction (z-axis direction) with respect to the center of the piston 1330.

[0083] For ease of description, the pressing portions 1350 that are symmetrically spaced apart from each other in the left-right direction (x-axis direction) are referred to as the first pressing portions 1351, and the pressing portions 1350 that are symmetrically spaced apart from each other in the up-down direction (z-axis direction) are referred to as the second pressing portions 1352.

[0084] When the distance between the first pressing portions 1351 that are spaced apart from each other in the first direction (x-axis direction) with respect to the center of the piston 1330 increases, the moment formed in the piston 1330 increases. Therefore, it is necessary to control the increase in the moment formed in the piston 1330.

[0085] To this end, the braking device 1000 according to an embodiment of the present disclosure may further include second pressing portions 1352 that are symmetrically spaced apart from each other in the vertical direction (z-axis direction) with respect to the center of the piston 1330, thereby increasing the pressing area for pressing the brake pad 1200 at the center of the piston 1330. This can reduce the moment formed in the piston 1330. Therefore, the possibility of damage to the piston 1330 can be reduced.

[0086] In addition, with reference to Figure 2 and Figure 3 simultaneously, the braking device 1000 according to an embodiment of the present disclosure may further include a back plate 1600 located between one surface of the brake pad 1200 and the piston 1330. The back plate 1600 may include a stopper protrusion 1610 formed on one of its surfaces, and the at least two pressing portions 1350 may include stopper grooves 1353 that come into contact with the stopper protrusion 1616.

[0087] This is to prevent the pressing areas of the plurality of pressing portions 1350 from moving out of the area where the brake pad 1200 is located during the pivoting of the piston 1330 on one side of the conversion assembly 1320.

[0088] That is, in order to enable the plurality of pressing portions 1350 to uniformly apply pressure to the entire surface of the brake pad 1200, the braking device 1000 according to an embodiment of the present disclosure is provided with a stopper protrusion 1610 and stopper grooves 1353 that come into contact with the stopper protrusion 1610, thereby preventing the pressing areas of the plurality of pressing portions 1350 from moving out of the area where the brake pad 1200 is located.

[0089] In addition, in an embodiment for reducing the moment formed in the piston 1330, when the first pressing portion 1351 and the second pressing portion 1352 are provided, as shown in (b) of Figure 10 , considering the rotational shape of the piston 1330, a stopper groove 1353 may be formed in the first pressing portion 1351.

[0090] In summary, the braking device according to the present disclosure and a vehicle including the same can ensure braking performance by reducing the total length of the caliper body while reducing the manufacturing cost. In addition, the pressure can be evenly distributed on one surface of the brake pad to increase the surface pressure of the brake pad.

[0091] The above detailed description should be construed as illustrative in all aspects and not restrictive. The scope of the present disclosure should be determined by a reasonable interpretation of the technical solutions of the present disclosure, and all changes within the equivalent scope of the present disclosure should be included within the scope of the present disclosure.

Claims

1. A braking device, comprising: A caliper body; A brake pad, which is installed on one side of the caliper body; An installation part, which is formed inside the caliper body; And A pad propulsion unit, which is located in the installation part and configured to press one surface of the brake pad, Wherein, the pad propulsion unit includes: A rotating medium, which rotates; A conversion component, which engages with the rotating medium and converts the rotational motion into a linear motion together with the rotating medium; and A piston, which is formed around one side of the conversion component.

2. The braking device according to claim 1, wherein, The conversion component includes: A ball nut, which is coupled to the rotating medium and rotates together with the rotating medium; and A ball screw, which passes through the rotating medium and the ball nut and moves forward or backward through the rotation of the ball nut.

3. The braking device according to claim 2, wherein, The conversion component further includes a ball bearing installed on the outer peripheral surface of the ball nut.

4. The braking device according to claim 3, wherein, The ball nut includes a contact part, which is formed to protrude from the outer peripheral surface of the ball nut and contact the ball bearing.

5. The braking device according to claim 2, wherein, The ball screw includes a head, which has a curved surface on one side of the head, and Wherein the piston includes a connection surface, which has a curved surface formed to correspond to the curved surface of the head.

6. The braking device according to claim 5, wherein, A gap is formed between one side of the head and one side of the connection surface.

7. The braking device according to claim 5, wherein, The conversion component further includes an annular sealing part, which is coupled to the outer peripheral surface of the head, and Wherein the piston includes an insertion groove, and the sealing part is inserted into the insertion groove.

8. The braking device according to claim 2, wherein, The ball screw includes at least one anti-rotation groove formed therein, Wherein the at least one anti-rotation groove has a polygonal shape, and Wherein the ball screw is formed to be longer than the length of the ball nut.

9. The braking device according to claim 1, wherein, The piston includes at least two pressing parts, and at least two of the pressing parts are symmetrically spaced apart from each other in a first direction or a second direction with respect to the center of the conversion component, and Wherein the second direction is perpendicular to the first direction.

10. A vehicle, comprising: A vehicle body; A wheel, which is located below the vehicle body and rotates; A brake disc, which is coupled to the wheel and rotates together with the wheel; A caliper body, and one end of the brake disc is inserted into the caliper body; A brake pad, which is installed on one side of the caliper body, and one surface of the brake pad faces the brake disc; An installation part, which is formed inside the caliper body; And A pad propulsion unit, which is located in the installation part and configured to press one surface of the brake pad, Wherein, the pad propulsion unit includes: A rotating medium, which rotates; A conversion component, which engages with the rotating medium and converts the rotational motion into a linear motion together with the rotating medium; and A piston, which is formed around one side of the conversion component.

Images