Brake device and vehicle

Abstract

The utility model discloses a brake device and a vehicle, and the brake device comprises a caliper housing which is provided with a containing cavity; the braking part is arranged on the caliper shell, and the braking part is located on one side of the containing cavity; the pushing part is contained in the containing cavity and connected with the braking part, and the pushing part is configured to be capable of pushing the braking part to move; the driving part is connected with the pushing part, and the driving part is configured to be capable of driving the pushing part to move; the first friction part is arranged on the side wall of the containing cavity, the pushing part penetrates through the first friction part and is in sliding connection with the first friction part, and the first friction part is located between the caliper shell and the pushing part so that the pushing part and the side wall of the containing cavity can be arranged in a spaced mode; the length of the contact part of the first friction part and the pushing part is smaller than the length of the side wall of the containing cavity. According to the brake device, the mechanical structure of the calipers can be simplified, the mechanical efficiency of the calipers is improved, and the consistency of the mechanical efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technical field of electric control mechanical caliper, especially relates to a brake device and vehicle. BACKGROUND

[0002] In the traditional hydraulic caliper system, the generation of clamping force depends on a floating piston structure. The piston moves under the action of hydraulic pressure, thereby realizing the clamping of the caliper. The sealing between the piston and the caliper housing is realized by a rectangular sealing ring, which ensures the stability of the pressure in the hydraulic system. This design allows the piston to be centered under the action of liquid pressure, thereby increasing the clamping force while avoiding direct contact and friction between the caliper housing and the piston, maintaining the high efficiency of the caliper.

[0003] However, unlike the traditional hydraulic caliper, the commonly used electric control mechanical caliper currently does not rely on brake fluid to push the piston to realize the clamping of the caliper. The electric control mechanical caliper in the prior art directly pushes the piston with a ball screw to realize the clamping of the caliper. In this design, since there is no hydraulic pressure, the piston will not generate a centering force. Therefore, under the action of a large clamping force, the direct contact between the inner wall of the caliper and the outer ring of the piston will cause a significant increase in friction, especially in the case of deformation that may occur in the caliper, which will cause a significant decrease in the mechanical efficiency of the caliper. SUMMARY

[0004] The utility model aims at solving the problem of large friction between the piston and the inner wall of the caliper of the existing electric control mechanical caliper, which leads to low mechanical efficiency of the caliper. The utility model provides a brake device and vehicle, which can cancel the piston, simplify the mechanical structure of the caliper, reduce the frictional resistance between the pushing part and the caliper housing, improve the mechanical efficiency of the caliper, and ensure the consistency of the mechanical efficiency.

[0005] To solve the above technical problems, the embodiment of the utility model discloses a kind of brake devices, comprising: caliper shell, with the accommodating cavity extending along the first direction;Brake part, be located in the caliper shell, along the first direction, the brake part is located in the side of accommodating cavity;Pushing part, is housed in the accommodating cavity, with the brake part is connected, the pushing part is configured to be able to push the brake part movement along the first direction;Driving part, with the pushing part is connected, the driving part is configured to be able to drive the pushing part movement along the first direction;First friction part, be located in the side wall of the accommodating cavity, along the first direction, the pushing part passes through the first friction part and with the first friction part sliding connection, along second direction, the first friction part is located between the caliper shell and the pushing part, to make the pushing part and the side wall of the accommodating cavity interval arrangement, the first direction and the second direction intersect;Wherein, along the first direction, the length of the contact part of the first friction part and the pushing part is less than the length of the side wall of the accommodating cavity.

[0006] With the above technical scheme, the pushing part (for example, nut) of the embodiment of the application is in sliding connection with the first friction part (for example, friction ring) during movement along the first direction relative to the caliper shell, instead of being in sliding connection with the side wall of the accommodating cavity. Along the first direction, the length of the contact part of the first friction part and the pushing part is less than the length of the side wall of the accommodating cavity. That is, the length of the first friction part in the first direction is smaller in the embodiment of the application, so that the contact area between the first friction part and the pushing part is smaller, and the frictional resistance generated by the sliding connection between the first friction part and the pushing part is smaller. During the process of pushing the brake part to implement clamping along the first direction by the pushing part, the large frictional resistance generated by the large-area contact between the pushing part and the side wall of the accommodating cavity is avoided, and small and stable frictional resistance between the pushing part and the side wall of the accommodating cavity is ensured.

[0007] Furthermore, compared with the electrically controlled mechanical caliper in the prior art, on the one hand, the embodiment of the application increases the mechanical efficiency of the brake device under large clamping force by using a small-size first friction part. On the other hand, the embodiment of the application removes the separate piston and the sealing ring, simplifies the mechanical structure of the caliper, and ensures the consistency of the mechanical efficiency of the brake device during mass production.

[0008] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a kind of brake devices, and the first friction part includes friction ring, and the friction ring is located in the side of the accommodating cavity close to the brake part, and extend along third direction;The friction ring has the first through hole along the first direction through the first friction part, and the pushing part passes through the first through hole, and with the friction ring sliding connection, the third direction surrounds the first direction;Along the first direction, the length of the friction ring is less than the length of the side wall of the accommodating cavity.

[0009] By using the above technical solution, the embodiment of the present application realizes the centering and support of the pushing part by using the sliding connection mode of the small-size friction ring and the pushing part. Compared with the electric control mechanical caliper in the prior art, the contact area between the friction ring and the pushing part is small, the friction resistance generated is small, the influence on the mechanical efficiency of the movement of the pushing part in the first direction is small, and the mechanical efficiency of the clamping process of the brake device is increased.

[0010] According to another specific embodiment of the present application, the embodiment of the present application discloses a brake device, the caliper shell comprises an opening, the opening is communicated with the accommodating cavity, the driving part extends out of the accommodating cavity through the opening; the brake device further comprises a second friction part, the second friction part is arranged on the hole wall of the opening, has a second through hole penetrating through the second friction part along the first direction, the driving part penetrates through the second through hole and is in sliding connection with the second friction part, along the second direction, the second friction part is located between the driving part and the hole wall of the opening.

[0011] According to another specific embodiment of the present application, the embodiment of the present application discloses a brake device, the second friction part comprises a friction bushing, the friction bushing is arranged on the hole wall of the opening and extends along the third direction, the driving part penetrates through the friction bushing and is in sliding connection with the friction bushing.

[0012] By using the above technical solution, the embodiment of the present application realizes the centering and support of the pushing part by using the sliding connection mode of the small-size friction ring and the pushing part. Compared with the electric control mechanical caliper in the prior art, the contact area between the friction ring and the pushing part is small, the friction resistance generated is small, the influence on the mechanical efficiency of the movement of the pushing part in the first direction is small, and the mechanical efficiency of the clamping process of the brake device is increased.

[0013] According to another specific embodiment of the present application, the embodiment of the present application discloses a brake device, the outer wall of the friction bushing has a convex part, along the first direction, the convex part is arranged at one end of the outer wall of the friction bushing away from the accommodating cavity, the hole wall of the opening has a concave part corresponding to the convex part, the convex part is accommodated in the concave part and abuts against the concave part, so as to limit the movement of the friction bushing relative to the opening along the first direction.

[0014] According to another specific embodiment of the present application, the embodiment of the present application discloses a brake device, the materials of the friction ring and the friction bushing respectively comprise copper, plastic or composite material.

[0015] By using the above technical solution, the friction ring and the friction bush prepared by using the material with low friction coefficient are used to further reduce the friction resistance of the pushing part and the driving part relative to the caliper shell during movement, and the mechanical efficiency of the braking device during the clamping process is further improved.

[0016] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a kind of brake devices, the driving part includes screw rod, the pushing part includes nut, the nut is sleeved on the outer side of the screw rod, and is connected with the screw rod transmission, the screw rod is configured to be able to rotate along the third direction, to drive the nut movement along the first direction;Along the first direction, the nut passes through the first through hole and is slidably connected with the friction ring, the screw rod passes through the second through hole and is slidably connected with the friction bush.

[0017] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a kind of brake devices, the side wall of the accommodating cavity further includes limiting groove, the limiting groove extends along the first direction, the outer wall of the nut includes the rotation stop boss corresponding with the limiting groove, and the rotation stop boss is protruded on the outer wall of the nut;The rotation stop boss is configured to be accommodated in the limiting groove, to limit the nut relative to the side wall of the accommodating cavity rotation along third direction, and can be relative to the limiting groove movement along the first direction.

[0018] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a kind of brake devices, further include dust cover, the outer wall of the pushing part is provided with fixed groove, along the second direction, the outside end of the dust cover is connected to the caliper shell, the inside end of the dust cover is sleeved on the outer wall of the pushing part, and is accommodated in the fixed groove, so that the inside end of the dust cover can follow the pushing part relative to the caliper shell telescopic movement along the first direction.

[0019] The embodiment of the utility model further discloses a kind of vehicle, including wheel, and the brake device described in any of the above embodiments, the pushing part is used to push the braking part along the first direction towards the brake disc of the vehicle, to brake the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It shows the perspective exploded view of the brake device of the embodiment of the utility model;

[0021] Figure 2 It shows the sectional view of the brake device of the embodiment of the utility model;

[0022] Figure 3 It shows the perspective exploded view of the pushing part and the friction assembly of the embodiment of the utility model;

[0023] Figure 4 Show Figure 2 A magnified view of a portion of region A in the middle;

[0024] Figure 5 Show Figure 2 A magnified view of a portion of region B in the middle. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", 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 that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0028] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] In the description of the present embodiment, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear, the embodiments of the utility model will be described in further detail below with reference to the drawings.

[0031] Reference Figure 1 And Figure 2 The present application provides a kind of brake device 1. Wherein, the brake device 1 of the present application embodiment includes: caliper shell 11, brake part 12, push part 13, driving part and friction assembly 14.

[0032] Specifically, as Figure 1 Indicated, caliper shell 11 has accommodating cavity 111. Exemplarily, accommodating cavity 111 extends along the first direction (i.e. the axial direction of accommodating cavity 111, as indicated in X direction of Figure 1 Along the first direction X, brake part 12 is arranged in caliper shell 11 and located at one side of accommodating cavity 111. Push part 13 is accommodated in accommodating cavity 111, driving part is connected with push part 13, and driving part is configured to drive push part 13 to move along the first direction X relative to caliper shell 11, push part 13 is connected with brake part 12, so that push part 13 can push brake part 12 to move along the first direction X. Exemplarily, the brake device 1 of the present application embodiment is applied to the brake of wheel, and the brake part 12 of the present application embodiment is friction plate, and end cover 114 is arranged between push part 13 and friction plate 121 close to one side of accommodating cavity 111, one end of end cover 114 is connected with push part 13, and the other end of end cover 114 is connected with friction plate 121.

[0033] It can be understood that the caliper shell 11 of the embodiment of the present application is provided with two friction plates, which are arranged at intervals along the first direction X, wherein the friction plate 121 close to the accommodation cavity 111 side can be pushed by the pushing part 13, and the other side of the friction plate 122 is fixed to one end 1101 of the caliper shell 11, and together define a containing space 123 for accommodating the brake disc of the vehicle wheel. For the convenience of description below, the braking part 12 of the embodiment of the present application is described by taking the friction plate 121 close to the accommodation cavity 111 side as an example. Thus, the pushing part 13 of the embodiment of the present application can push the friction plate 121 to move along the first direction X towards the brake disc (not shown in the figure) of the vehicle to brake the vehicle. Exemplarily, the first direction X is parallel to the axial direction of the vehicle wheel.

[0034] Reference Figure 3 and in combination Figure 1 and Figure 2 The above-mentioned friction assembly 14 is arranged in the caliper shell 11. Moreover, the friction assembly 14 of the embodiment of the present application is provided with a through hole, which can be passed through by the pushing part 13 and the driving part. The friction assembly 14 of the embodiment of the present application includes a first friction part and a second friction part. Exemplarily, the first friction part of the embodiment of the present application is a friction ring 141, and the second friction part is a friction bushing 142. However, it is not limited thereto, and the structure of the friction assembly 14 of the embodiment of the present application is not specifically limited, as long as it can be used to be respectively connected with the pushing part 13 and the driving part in sliding manner, so as to respectively reduce the frictional resistance between the pushing part 13 and the driving part and the caliper shell 11.

[0035] For the convenience of description below, the friction assembly 14 of the embodiment of the present application is described by taking the first friction part as a friction ring 141 and the second friction part as a friction bushing 142 as an example.

[0036] That is, along the first direction X, the pushing part 13 of the embodiment of the present application passes through the friction ring 141 and is connected with the friction ring 141 in sliding manner. Moreover, along the second direction (i.e. the radial direction of the accommodation cavity 111, as shown by the Y direction in the figure), the friction ring 141 is located between the caliper shell 11 and the pushing part 13. That is, along the second direction Y, the pushing part 13, the friction ring 141 and the side wall 1111 of the accommodation cavity are arranged in sequence, so that the pushing part 13 is arranged at intervals with the side wall 1111 of the accommodation cavity. Figure 2

[0037] Thus, the pushing part 13 of the embodiment of the present application is connected with the friction ring 141 in sliding manner during the movement relative to the caliper shell 11 along the first direction X, rather than being connected with the side wall 1111 of the accommodation cavity in sliding manner. Figure 4 As shown in the figure, along the first direction X, the length W1 of the contact part of the friction ring 141 with the pushing part 13 is less than the length W2 of the side wall 1111 of the accommodation cavity. Exemplarily, the first direction X intersects with the second direction Y. ​

[0038] In other words, the friction ring 141 of this embodiment has a shorter length along the first direction X, and the frictional resistance generated by the sliding connection with the pushing part 13 is smaller. During the process of the pushing part 13 pushing the friction piece 121 along the first direction X to perform clamping, the large frictional resistance generated by its large-area contact with the side wall 1111 of the receiving cavity is avoided, thus ensuring a small and stable frictional resistance between the pushing part 13 and the side wall 1111 of the receiving cavity.

[0039] It should be noted that, in the embodiments of this application, the length W1 of the contact portion between the friction ring 141 and the pushing part 13 is less than the length W2 of the side wall 1111 of the receiving cavity, meaning that, as Figure 2 As shown, when the length of the pushing part 13 is greater than or equal to the length W2 of the side wall 1111 of the receiving cavity, assuming that the pushing part 13 is slidably connected to the side wall 1111 of the receiving cavity, the length of the contact portion between the pushing part 13 and the side wall 1111 of the receiving cavity is the length W2 of the side wall 1111 of the receiving cavity. However, the length W1 of the contact portion between the pushing part 13 and the friction ring 141 is less than the length W2 of the side wall 1111 of the receiving cavity, indicating that the frictional resistance generated by the sliding connection between the pushing part 13 and the friction ring 141 is smaller.

[0040] However, this application embodiment does not limit this. For example, when the length of the pushing part 13 is less than the length W2 of the side wall 1111 of the receiving cavity, assuming that the pushing part 13 is slidably connected to the side wall 1111 of the receiving cavity, the length of the contact portion between the pushing part 13 and the side wall 1111 of the receiving cavity is the length of the pushing part 13. At this time, the length W1 of the contact portion between the friction ring 141 and the pushing part 13 in this application embodiment should be limited to less than the length of the pushing part 13.

[0041] Furthermore, compared with existing electromechanical calipers, this embodiment increases the mechanical efficiency of the braking device 1 under high clamping force by using a small-sized friction ring 141. On the other hand, this embodiment eliminates the separate piston and sealing ring, simplifying the mechanical structure of the caliper and ensuring the consistency of the mechanical efficiency of the braking device 1 during mass production.

[0042] The structure and working principle of the pushing part 13, the driving part and the friction assembly 14 of the present application embodiment will be described in detail below with reference to the accompanying drawings.

[0043] Figure 4 Show Figure 2 A magnified view of a portion of region A (the framed area). Figure 5 Show Figure 2 A magnified view of a portion of region B (the circular region).

[0044] refer to Figures 3 to 5The driving part of the embodiment of the present application comprises a screw rod 131, and the pushing part 13 comprises a nut 132. Exemplarily, the pushing part 13 and the driving part of the embodiment of the present application jointly constitute a ball screw, but the embodiment of the present application does not make specific limitation to the structure of the pushing part 13 and the driving part, as long as the driving part can drive the pushing part to push the braking part 12 to move in the first direction X. For example, the pushing part 13 of the embodiment of the present application can also be a connecting rod, and the driving part can also be a pneumatic cylinder or a driving motor in transmission connection with the connecting rod.

[0045] Hereinafter, for the convenience of description, the embodiment of the present application is described by taking the driving part as the screw rod 131 and the pushing part 13 as the nut 132 as an example.

[0046] Specifically, as shown in Figure 3 and Figure 4 , the nut 132 is sleeved outside the screw rod 131 and is connected with the screw rod 131 by using balls (not shown in the figure), the screw rod 131 is configured to be able to rotate in the third direction R and drive the nut 132 to move in the first direction X by rotation. That is, the nut 132 can move in the first direction X when the screw rod 131 rotates. Exemplarily, in the embodiment of the present application, the screw rod 131 between the screw rod 131 and the nut 132 is sequentially sleeved with a supporting gasket 1311, a thrust bearing 1312 and a flat gasket 1313 in the first direction X, and the supporting gasket 1311, the thrust bearing 1312 and the flat gasket 1313 are all located inside the nut 132.

[0047] In other words, one end 13201 of the nut 132 is connected with the end cover 114, one end 13101 of the screw rod 131 is inserted into the nut 132 and connected with the nut 132 by using balls, the other end 13102 of the screw rod 131 extends out of the accommodating cavity 111 and is in transmission connection with an external driving device (not shown in the figure, for example, a driving motor), so that the screw rod 131 is driven to rotate by the driving device, and when the nut 132 is driven to move in the first direction X by one end 13101 of the screw rod 131, one end 13201 of the nut 132 pushes the end cover 114 to move in the first direction X, and further pushes the friction plate 121 connected with the end cover 114 to move in the first direction X towards the brake disc (not shown in the figure) of the wheel, so as to clamp the brake disc and realize the braking of the vehicle. Exemplarily, the screw rod 131 and the nut 132 of the embodiment of the present application are connected by using balls; but are not limited thereto, the embodiment of the present application does not make specific limitation to the transmission connection mode between the screw rod and the nut, for example, the screw rod 131 and the nut 132 can also be in threaded connection.

[0048] Exemplarily, the flat gasket 1313 of the embodiment of the present application is further provided with a mounting cavity 116 away from the side of the thrust bearing 1312, the mounting cavity 116 is jointly defined by the other end 13202 of the nut 132 and the stepped boss of the side wall 1111 of the accommodating cavity 111, and is used for mounting a force sensor (not shown in the figure) so that the force sensor is supported on the stepped boss of the side wall 1111 of the accommodating cavity 111. However, the embodiment of the present application can also not be provided with the mounting cavity 116, so as to reduce the length of the accommodating cavity 111 in the first direction X and optimize the size of the brake device 1 in the first direction X.

[0049] Exemplarily, as shown in Figure 4 the other end 13102 of the lead screw 131 of the embodiment of the present application extends out of the accommodating cavity 111 and is provided with a male spline 1314 and an internal spline hole 1315 at the end. However, the other end 13102 of the lead screw 131 of the embodiment of the present application can also be provided with a female spline (not shown in the figure), that is, the whole part of the lead screw 131 does not extend out of the accommodating cavity 111, so as to reduce the combined height of the brake device 1 of the embodiment of the present application and reduce the size of the brake device 1 in the first direction X.

[0050] Exemplarily, as shown in Figure 4 the side wall 1111 of the accommodating cavity 111 of the embodiment of the present application is further provided with a limiting groove 1112, and the outer wall 1321 of the nut 132 is provided with a rotation-stopping boss 1322 corresponding to the limiting groove 1112. The rotation-stopping boss 1322 is protruded on the outer wall 1321 of the nut 132, and the limiting groove 1112 extends along the first direction X. When the nut 132 is installed in the accommodating cavity 111, the rotation-stopping boss 1322 is configured to be accommodated in the limiting groove 1112, and the two are matched with each other to limit the rotation of the nut 132 relative to the side wall 1111 of the accommodating cavity 111 along the third direction R, and the limiting groove 1112 is also used for guiding the rotation-stopping boss 1322 so that the nut 132 can move relative to the limiting groove 1112 along the first direction X.

[0051] And it can be understood that the rotation-stopping boss 1322 of the nut 132 can move in the limiting groove 1112, that is, the length of the limiting groove 1112 defines the stroke of the nut 132 along the first direction X, so that the limiting groove 1112 can also be used to prevent the nut 132 from moving out of the accommodating cavity 111 along the first direction X and affecting the normal use of the brake device 1.

[0052] Exemplarily, the number of the rotation-stopping boss 1322 and the limiting groove 1112 of the embodiment of the present application is not specifically limited, Figure 4Two rotation-stopping bosses 1322 and two limiting grooves 1112 corresponding to the rotation-stopping bosses 1322 are shown in FIG. 13, but the number of the rotation-stopping bosses 1322 and the limiting grooves 1112 is not limited to two, and can be one, three, four, five, six or more.

[0053] As shown in FIG. 13, Figure 3 and Figure 4 the brake device 1 further comprises a buckle 16. The other end 13102 of the screw rod 131 is provided with a groove corresponding to the buckle 16, and the buckle 16 is sleeved on the other end 13102 of the screw rod 131 and accommodated in the groove. In the first direction X, the buckle 16 is located on the side of the opening 112 away from the accommodating cavity 111, so as to limit the movement of the screw rod 131 in the first direction X towards the accommodating cavity 111.

[0054] As shown in FIG. 13, and

[0055] the buckle 16 has a "Y"-shaped through hole, and one end of the "Y"-shaped through hole extends to the outside of the side wall of the buckle 16, so that the "Y"-shaped through hole is in communication with the outside, and the buckle 16 can be inserted into the groove of the other end 13102 of the screw rod 131 in the second direction Y, thereby simplifying the assembly of the screw rod 131. Figure 3 Figure 4 As shown in FIG. 13, Figure 3 the friction ring 141 extends in the third direction (i.e. the circumferential direction of the accommodating cavity 111, as shown by the R direction in FIG. 13), and the friction ring 141 is accommodated in the accommodating cavity 111, located on the side 11101 of the accommodating cavity 111 close to the friction plate 121, and arranged on the side wall 1111 of the accommodating cavity. The friction ring 141 has a first through hole 1411 extending in the first direction X. As shown in FIG. 13, Figure 4 exemplarily, in the first direction X, the length W1 of the friction ring 141 is less than the length W2 of the side wall 1111 of the accommodating cavity 111.

[0056] Further, the caliper shell 11 further comprises an opening 112 extending in the first direction X, and the opening 112 is in communication with the accommodating cavity 111. The friction bushing 142 extends in the third direction R, and the friction bushing 142 is arranged on the hole wall 1121 of the opening 112, and the friction bushing 142 has a second through hole 1421 extending in the first direction X. As shown in FIG. 13,

[0057] exemplarily, the third direction R is around the first direction X. As shown in FIG. 13, Figure 4As shown, the outer wall 1422 of the friction bushing 142 of the embodiment of the present application is provided with a protrusion 1423, and the hole wall 1121 of the opening 112 is provided with a recess 1122 corresponding to the protrusion 1423. The protrusion 1423 is provided on the outer wall 1422 of the friction bushing 142 and extends along the third direction R, and the protrusion 1423 is accommodated in the recess 1122 and abuts against the recess 1122 to limit the movement of the friction bushing 142 relative to the opening 112 along the first direction X, so as to fix the friction bushing 142 on the caliper housing 11.

[0058] Therefore, along the first direction X, one end 13201 of the nut 132 of the embodiment of the present application passes through the first through hole 1411 and is in sliding connection with the friction ring 141, and the other end 13102 of the lead screw 131 passes through the second through hole 1421 and is in sliding connection with the friction bushing 142. And along the second direction Y, the friction ring 141 is located between the one end 13201 of the nut 132 and the side wall 1111 of the accommodating cavity 111, and the friction bushing 142 is located between the other end 13102 of the lead screw 131 and the hole wall 1121 of the opening 112.

[0059] The embodiment of the present application realizes the centering and support of the lead screw 131 and the nut 132 by using small-size friction ring 141 and friction bushing 142 to be in sliding connection with the lead screw 131 and the nut 132 respectively. Compared with the electrically controlled mechanical caliper in the prior art, the contact area between the friction ring 141 and the friction bushing 142 and the lead screw 131 and the nut 132 is small, the friction resistance generated is small, the influence on the mechanical efficiency of the movement of the lead screw 131 and the nut 132 along the first direction X is small, and the mechanical efficiency of the clamping process of the brake device 1 is increased.

[0060] For example, the materials of the friction ring 141 and the friction bushing 142 of the embodiment of the present application include copper, plastic or composite materials and the like with low friction coefficient. Furthermore, the embodiment of the present application further reduces the friction resistance suffered by the lead screw 131 and the nut 132 when moving relative to the caliper housing 11 by using the friction ring 141 and the friction bushing 142 made of materials with low friction coefficient, and further improves the mechanical efficiency of the clamping process of the brake device 1. The low-friction coefficient material mentioned in the embodiment of the present application refers to a material with a friction coefficient of 0.04 to 0.2, for example, 0.04, 0.08, 0.1, 0.15, 0.2 and the like.

[0061] As shown, Figure 5 The brake device 1 of the embodiment of the present application further comprises a dust cover 15.

[0062] Specifically, the dust cover 15 is arranged along the third direction R around the accommodating cavity 111, and the outer end 151 of the dust cover 15 is connected to the caliper shell 11 along the second direction Y, and the inner end 152 of the dust cover 15 is sleeved on the nut 132. The outer wall 1321 of the nut 132 is provided with a fixing groove 1323, and the inner end 152 of the dust cover 15 is accommodated in the fixing groove 1323 and fixedly connected with the nut 132, so that the inner end 152 of the dust cover 15 can follow the nut 132 to extend and contract relative to the caliper shell 11 along the first direction X, thereby playing a sealing and dustproof role.

[0063] For example, one side 11101 of the accommodating cavity 111 is provided with a groove extending around the side wall 1111 of the accommodating cavity 111, the outer end 151 of the dust cover 15 has a hook-shaped structure in cross-section, so that the outer end 151 of the dust cover 15 is clamped with the groove, and the inner end 152 of the dust cover 15 has a spherical structure in cross-section, so that the inner end 152 of the dust cover 15 is clamped with the fixing groove 1323. Furthermore, the dust cover 15 of the embodiment of the application further comprises a bending portion 153, which can extend and contract along the first direction X, so that when the dust cover 15 moves with the nut 132, the two ends of the dust cover 15 will not fall off from the caliper shell 11. However, the structure of the dust cover is not limited in the embodiment of the application, as long as it can connect the nut 132 and the caliper shell 11 to play a sealing and dustproof role.

[0064] In addition, as shown in Figure 1 the other end 1102 of the embodiment of the application also has a mounting hole 115, which is arranged on the opposite sides of the second direction Y of the accommodating cavity 111 and on the outside of the side wall 1111 of the accommodating cavity 111, so that the caliper shell 11 of the embodiment of the application can be mounted on an external vehicle. One end 1101 of the caliper shell 11 of the embodiment of the application also has a centrally located notch 113, through which the pushing part 13 can be fitted into the accommodating cavity 111 of the caliper shell 11. That is, through the notch 113, the pushing part 13 and the braking part 12 can be more conveniently mounted on the caliper shell 11, thereby simplifying the assembly of the brake device 1 of the embodiment of the application.

[0065] In summary, the brake device 1 of the embodiment of the application can reduce the frictional resistance of the pushing part 13 along the axial direction (i.e. the first direction X) during the clamping process of the brake device 1 by using a small-sized friction assembly 14, thereby improving the mechanical efficiency of the caliper and ensuring the consistency of the mechanical efficiency, and further eliminating the need for a separate piston and sealing ring, thereby simplifying the mechanical structure of the caliper.

[0066] Although the utility model has been illustrated and described by referring to certain preferred embodiments of the utility model, it should be understood by those skilled in the art that the above content is the further detailed description of the utility model combined with the specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple inferences or replacements, without departing from the spirit and scope of the utility model.

Claims

1. A brake device characterized by comprising: The brake device comprises: a caliper shell having a receiving cavity extending along a first direction; a brake portion provided on the caliper shell and located on one side of the receiving cavity along the first direction; a pushing portion accommodated in the receiving cavity and connected with the brake portion, the pushing portion being configured to push the brake portion to move along the first direction; a driving portion connected with the pushing portion, the driving portion being configured to drive the pushing portion to move along the first direction; a first friction portion provided on a side wall of the receiving cavity, the pushing portion passing through the first friction portion and being in sliding connection with the first friction portion along the first direction, the first friction portion being located between the caliper shell and the pushing portion along a second direction, so that the pushing portion is spaced apart from the side wall of the receiving cavity, the first direction intersecting the second direction; wherein the length of the contact part of the pushing portion with the first friction portion along the first direction is less than the length of the side wall of the receiving cavity.

2. The brake device according to claim 1, characterized by The first friction portion comprises a friction ring provided on one side of the receiving cavity close to the brake portion and extending along a third direction; the friction ring has a first through hole penetrating through the first friction portion along the first direction, the pushing portion passing through the first through hole and being in sliding connection with the friction ring, the third direction surrounding the first direction; the length of the friction ring along the first direction is less than the length of the side wall of the receiving cavity.

3. The brake device according to claim 2, characterized in that The caliper shell comprises an opening communicating with the receiving cavity, the driving portion passing through the opening and extending out of the receiving cavity; the brake device further comprises a second friction portion provided on the hole wall of the opening and having a second through hole penetrating through the second friction portion along the first direction, the driving portion passing through the second through hole and being in sliding connection with the second friction portion, the second friction portion being located between the driving portion and the hole wall of the opening along the second direction.

4. The brake device according to claim 3, characterized in that The second friction portion comprises a friction bushing provided on the hole wall of the opening and extending along a third direction, the driving portion passing through the friction bushing and being in sliding connection with the friction bushing.

5. The brake device according to claim 4, characterized in that the outer wall of the friction bushing has a protrusion provided on one end of the outer wall of the friction bushing away from the receiving cavity along the first direction, the hole wall of the opening has a recess corresponding to the protrusion, the protrusion being accommodated in the recess and abutting against the recess to limit the movement of the friction bushing relative to the opening along the first direction.

6. The brake device according to claim 5, characterized by The materials of the friction ring and the friction bushing respectively comprise copper, plastic or composite material.

7. The brake device according to claim 4, characterized by The driving portion comprises a lead screw, the pushing portion comprises a nut, the nut being sleeved on the outside of the lead screw and being in transmission connection with the lead screw, the lead screw being configured to rotate along the third direction to drive the nut to move along the first direction; the nut passes through the first through hole and is in sliding connection with the friction ring along the first direction, the lead screw passes through the second through hole and is in sliding connection with the friction bushing.

8. The brake device according to claim 7, characterized in that The side wall of the accommodating cavity further comprises a limiting groove extending along the first direction, and the outer wall of the nut comprises a rotation-stopping boss corresponding to the limiting groove, the rotation-stopping boss being protruded from the outer wall of the nut; The rotation-stopping boss is configured to be accommodated in the limiting groove to limit rotation of the nut relative to the side wall of the accommodating cavity along a third direction and to be movable relative to the limiting groove along the first direction.

9. The brake device according to claim 1, characterized by The dust cover is further included, the outer wall of the pushing part is provided with a fixing groove, and along the second direction, the outer end of the dust cover is connected to the caliper shell, the inner end of the dust cover is sleeved on the outer wall of the pushing part and accommodated in the fixing groove, so that the inner end of the dust cover can follow the pushing part to extend and retract relative to the caliper shell along the first direction.

10. A vehicle characterized by comprising: The brake device is applied to a vehicle wheel, and the pushing part is used to push the braking part to move along the first direction towards a brake disc of the vehicle to brake the vehicle.

Images