Brake damping device and brake pedal

Abstract

The utility model discloses a damping device for braking, which comprises a fixed shaft, a rotating sleeve, a friction piece and a driving component, and the rotating sleeve is sleeved on the fixed shaft and is rotatably connected with the fixed shaft; the friction piece is arranged between the fixed shaft and the rotary sleeve, can move in the axial direction of the fixed shaft and is used for adjusting the friction force between the rotary sleeve and the fixed sleeve. The driving assembly abuts against the friction piece and is used for driving the friction piece to move in the axial direction. The utility model further discloses a brake pedal provided with the brake damping device. The damping force can be increased along with the increase of displacement in the braking process of the pedal, so that the force fed back by the pedal is increased, and the foot feeling is optimized. And when braking is released, the damping force is greatly reduced along with release of the pedal arm, and the counter force of the pedal in the release process is reduced. And variable damping is achieved, and the experience feeling of a driver is more comfortable. Through the improvement on the structure, the braking force is improved, and the problems of insufficient braking force and overlarge elastic force in the treading process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of brake assist devices, in particular to a brake damping device, and also to a brake pedal applying the brake damping device. Background Art

[0002] The traditional automobile brake pedal resistance source is only realized by internal mechanisms such as vacuum booster, 1-box, 2-box, etc. With the development of wire control technology, modern cars have begun to use electronic brake pedals. However, due to the short travel of the existing pedal simulator, it is impossible to achieve a large force during the pedaling process, and during the pedal retraction process, the pedal reaction force is large, resulting in a "bouncing foot" phenomenon. During long-distance driving, the driver's ankle is prone to fatigue, which reduces the driver's comfort.

[0003] Based on the above problems existing in the prior art, in order to further improve driving comfort, optimize the foot feel during pedaling and releasing, and enhance braking force, designing a brake damping device suitable for a car pedal becomes the problem to be solved by this application. Utility Model Content

[0004] One of the purposes of the utility model is to provide a brake damping device, which improves the braking force through structural improvements and effectively avoids the problems of insufficient braking force and excessive elastic force during pedaling.

[0005] In order to solve the above technical problems, the present application provides a brake damping device including a fixed shaft, a rotating sleeve, a friction member and a driving assembly, wherein the rotating sleeve is placed on the fixed shaft and is rotatably connected to the fixed shaft; the friction member is arranged between the fixed shaft and the rotating sleeve and can move axially along the fixed shaft to adjust the friction force between the rotating sleeve and the fixed sleeve. The driving assembly abuts against the friction member and is used to drive the friction member to move axially.

[0006] In addition to the above-mentioned technical solutions, this application also makes improvements in the following aspects:

[0007] In some embodiments, the fixed shaft is provided with a cylindrical section and a conical section. The cylindrical section of the fixed shaft is provided with a spiral groove, and the spiral groove is spirally distributed along the axial direction of the fixed shaft; the conical section of the fixed shaft is provided with a slide groove, and at least one slide groove is provided and distributed circumferentially along the conical surface of the conical section.

[0008] In some embodiments, the outer diameter of the tapered section of the fixed shaft gradually decreases from the outer end to the end close to the cylindrical section; the minimum outer diameter of the tapered section of the fixed shaft is smaller than the outer diameter of the cylindrical section of the fixed shaft.

[0009] In some embodiments, the outer diameter of the tapered section of the fixed shaft gradually decreases from the outer end to the end close to the cylindrical section; the minimum outer diameter of the tapered section of the fixed shaft is not greater than the outer diameter of the cylindrical section of the fixed shaft.

[0010] In some embodiments, the inner side wall of the rotating sleeve is provided with at least one guide groove along its axial direction, and the guide grooves are distributed in an annular shape along the inner side wall of the rotating sleeve.

[0011] In some embodiments, the friction member includes at least one friction block, which is slidably mounted with the slide groove. The friction block is provided with an inner arc surface and an outer arc surface, the inner arc surface is in contact with the conical surface of the slide groove, and the outer arc surface is in contact with the inner side wall of the rotating sleeve. The shape of the inner arc surface of the friction block matches the shape of the slide groove contact surface of the conical section.

[0012] In some embodiments, the driving assembly includes a rotating pressure ring, an elastic member, and a thrust bearing is arranged between the rotating pressure ring and the elastic member. The elastic member is installed on the cylindrical section of the fixed shaft, and the two ends of the elastic member are respectively in contact with the friction block and the thrust bearing.

[0013] In some embodiments, the rotating pressure ring is provided with a sliding boss and a rotating boss; at least one sliding boss is provided, which is distributed on the outer ring surface of the rotating pressure ring and is slidably fitted with a guide groove provided on the inner side wall of the rotating sleeve. At least one rotating boss is provided, which is distributed on the inner ring surface of the rotating pressure ring, and the rotating boss on the rotating pressure ring is slidably fitted with a spiral groove provided on the fixed shaft.

[0014] In some embodiments, spring washers are respectively arranged between the elastic member and the friction block and between the thrust bearing and the elastic member.

[0015] In some embodiments, the spring washer is provided with a limiting groove, and the end of the elastic member abuts against the limiting groove of the spring washer.

[0016] Another object of the present application is to provide a brake pedal which is equipped with the above-mentioned brake damping device, thereby optimizing the foot feel during the pedaling process and improving the pedaling comfort and braking effect of the brake pedal.

[0017] Beneficial effects of the utility model:

[0018] 1. In the present application, a fixed shaft and a rotating sleeve are provided, and a friction member for changing the friction force between the rotating sleeve and the fixed shaft is provided between the rotating sleeve and the fixed shaft. The friction force between the rotating sleeve and the fixed shaft is changed by the interaction force of the rotating pressure ring of the driving assembly and the elastic member provided between the friction member and the rotating pressure ring. Through the smooth transmission of force, the braking stability is improved while the braking force required for the braking process is guaranteed.

[0019] 2. The fixed shaft in this application adopts a combined structural design of a conical section and a cylindrical section. The conical section of the fixed shaft is matched with the friction block, and the shape design matches the conical section. The change of damping force from small to large is achieved during the pedaling process, meeting the braking force requirements during the braking process. At the same time, the application is provided with a spiral groove in the cylindrical section of the fixed shaft. The spiral groove cooperates with the rotating boss provided on the spiral pressure ring to release the rebound force smoothly, avoiding the problem of rapid release of the rebound force, making the braking process more stable.

[0020] 3. The present application also records a brake pedal, which is equipped with the brake damping device, thereby optimizing the foot feel during the pedaling process and improving the comfort and braking effect of the brake pedal.

[0021] In summary, the present application optimizes the overall structure to achieve that during the braking process, as the displacement increases, the damping force increases from a small amount, thereby increasing the pedal braking force and optimizing the foot feel. When the brake is released, as the pedal arm is released, the damping force decreases from a large amount, reducing the reaction force of the pedal during the release process, achieving a change in the damping size, and making the driver's experience more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] Figure 1 This is a schematic diagram of the internal structure of the brake damping device for this application;

[0024] Figure 2 This is an exploded view of the brake damping device for this application;

[0025] Figure 3 The figure is a schematic diagram of the structure of a brake pedal equipped with the brake damping device.

[0026] The numbers in the figure are as follows:

[0027] 1. Pedal base; 2. Nut; 3. Bolt shaft; 4. Brake damping device; 5. Pedal arm; 401. Fixed shaft; 4011. Slide groove; 4012. Spiral groove; 402. Rotating sleeve; 4021. Guide groove; 403. Friction block; 404. Spring washer; 405. Elastic member; 406. Rotating pressure ring; 4061. Sliding boss; 4062. Rotating boss; 407. Thrust bearing. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present application and its application or use. The present application can be implemented in other different forms and is not limited to the embodiments described herein.

[0029] 1. Explanation of Descriptive Terms in This Application

[0030] The embodiments provided in this application in conjunction with the technical solutions are intended to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art. It should be noted that unless otherwise specifically stated in this application, the relative arrangement of components described in these embodiments should be interpreted as merely exemplary, and not as a limitation to the technical solutions of this application.

[0031] If the directional terms such as "upper", "lower", "left", "right", "bottom", "top" etc. are used in this application, they are defined relative to the directions in the drawings and are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be understood as restrictive terms.

[0032] In the present application, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0033] In addition, this application does not discuss in detail the technologies and equipment known to ordinary technicians in the relevant fields, but where appropriate, the technologies and equipment should be considered as part of the specification.

[0034] The application scenario of this application is mainly based on the automobile brake pedal, and it can also be applied to other scenarios according to its function. Its application scenario is not restricted or limited by the specific embodiments recorded in this application.

[0035] 2. Based on the problem that the existing pedal simulator cannot achieve a large force during pedaling due to its short stroke, and the pedal reaction force is large during the pedal retraction process, resulting in a "foot bouncing" phenomenon, which reduces the driver's comfort, the present application specifically provides a technical solution to the above-mentioned problem. The technical solution, working principle and technical effect of the present application are described in detail below in conjunction with specific embodiments.

[0036] This embodiment describes a brake damping device, which, when in use, is installed on the brake pedal of a car in order to improve stability and comfort during braking.

[0037] like Figure 1 , Figure 2 As shown, the brake damping device includes a rotating sleeve 402, a fixed shaft 401, a friction member, and a driving component for driving the friction member to move.

[0038] The rotating sleeve 402 is connected to the pedal arm 5 of the brake pedal. The rotating sleeve 402 is sleeved on the fixed shaft 401 and is rotationally connected to the fixed shaft 401 .

[0039] During operation, the brake pedal is stepped on to drive the pedal arm 5 to rotate, and the rotating sleeve 402 rotates with the pedal arm 5. The rotating sleeve 402 can rotate relative to the fixed shaft 401, acting on the driving component, and then driving the friction member to move, thereby adjusting the damping force.

[0040] In order to ensure the consistency and stability of the moving direction of the driving assembly, at least one guide groove 4021 is opened on the inner side wall of the rotating sleeve 402 along its axial direction.

[0041] Preferably, in this embodiment, the inner side wall of the rotating sleeve 402 is provided with four guide grooves 4021 along its axial direction, and the four guide grooves 4021 are distributed in a ring array along the inner side wall of the rotating sleeve 402 .

[0042] The fixed shaft 401 is matched with the rotating sleeve 402 , and a through hole is provided at the central axis of the fixed shaft 401 . The through hole is convenient for installation with the pedal.

[0043] When in use, the fixed shaft 401 is fixedly installed and fixed on the pedal base 1 through the nut 2.

[0044] In order to facilitate the installation of the friction member and adjust the damping force, the fixed shaft 401 adopts a structural design that combines a cylindrical section and a conical section.

[0045] The outer diameter of the tapered section of the fixed shaft 401 gradually decreases from the outer end to the end close to the cylindrical section. This structural design cooperates with the friction member to form a sliding fit structure, and the size of the friction force is changed through the combination of this sliding fit structure.

[0046] As a further optimization, the minimum outer diameter of the conical section of the fixed shaft 401 is less than or equal to the outer diameter of the cylindrical section of the fixed shaft 401. This design aims to ensure that the friction part moves only at the conical section, thereby limiting the friction part and preventing the friction part from detaching from the conical section and causing excessive rebound force.

[0047] In order to facilitate the installation of the friction member, a slide groove 4011 is further provided in the conical section of the fixed shaft 401 . There is at least one slide groove 4011 , and the slide groove 4011 is used for installing the friction member.

[0048] Preferably, in this embodiment, four slide grooves 4011 are provided, and the four slide grooves 4011 are distributed in an array along the circumference of the conical surface of the conical section. Of course, the distribution of the slide grooves 4011 can also adopt a non-array layout.

[0049] Friction pieces are installed in the four slide grooves 4011 respectively, forming a friction combination structure with the inner wall of the rotating sleeve 402 in four directions for adjusting the magnitude of the damping force.

[0050] In addition, a spiral groove 4012 is formed on the cylindrical section of the fixed shaft 401 , and the spiral groove 4012 is distributed in a spiral shape along the axial direction of the fixed shaft 401 .

[0051] The friction member is a main component for adjusting the friction force, and includes at least one friction block 403 , which is installed in a sliding cooperation with the slide groove 4011 .

[0052] Preferably, in this embodiment, four friction blocks 403 are provided.

[0053] In order to achieve the adjustment effect that the damping force changes from small to large during braking and changes from large to small after releasing the brake, while ensuring a good braking effect, the friction block 403 is optimized in structural design.

[0054] The friction block 403 is provided with an inner arc surface and an outer arc surface. The inner arc surface has a certain slope. The inner arc surface with a certain slope fits with the conical surface of the slide groove 4011, and the outer arc surface fits tightly with the inner wall of the rotating sleeve 402.

[0055] The shape of the inner arc surface of the friction block 403 matches the shape of the fitting surface of the sliding groove 4011 of the conical section.

[0056] The driving assembly is a driving mechanism for adjusting the damping force, and is used to drive the friction member to move in the axial direction along the slide groove 4011 .

[0057] The driving assembly includes a rotating pressure ring 406 and an elastic member 405 , and a thrust bearing 407 is arranged between the rotating pressure ring 406 and the elastic member 405 .

[0058] The elastic member 405 is mounted on the cylindrical section of the fixed shaft 401, and two ends of the elastic member 405 are respectively in contact with the friction block 403 and the thrust bearing 407. In this embodiment, the elastic member is a spring.

[0059] When the pedal is stepped on, the pedal arm 5 drives the rotating sleeve 402 to rotate, and then drives the rotating pressure ring 406 to rotate, and the compression elastic member 405 provides driving force for the friction block 403 to move.

[0060] As an optimization, a sliding boss 4061 and a rotating boss 4062 are provided on the rotating pressure ring 406, and at least one sliding boss 4061 is provided.

[0061] In this embodiment, four sliding bosses 4061 are provided. The four sliding bosses 4061 are distributed on the outer ring surface of the rotating pressure ring 406 and are slidably fitted with the guide grooves 4021 provided on the inner wall of the rotating sleeve 402 .

[0062] During operation, under the action of the rotating force of the rotating sleeve 402, the sliding boss 4061 of the rotating pressure ring 406 moves along the guide groove 4021 toward the inside of the rotating sleeve 402, and adjusts the position of the friction block 403 in the slide groove 4011 by squeezing the elastic member 405, thereby adjusting the damping force.

[0063] As a further optimization, the rotating boss 4062 is designed to cooperate with the spiral groove 4012 on the fixed shaft 401, and at least one rotating boss 4062 is provided.

[0064] In this embodiment, two rotating bosses 4062 are arranged, distributed on the inner ring surface of the rotating pressure ring 406 and arranged corresponding to the spiral groove 4012 . The rotating bosses 4062 on the rotating pressure ring 406 are slidably fitted with the spiral groove 4012 arranged on the fixed shaft 401 .

[0065] This design is to achieve the adjustment of the damping force on the one hand, and to ensure the stability of the axial pressure on the other hand.

[0066] To further ensure that the friction block 403 and the thrust bearing 407 are evenly stressed after being pressed by the elastic member 405 during the process of stepping on and releasing the pedal, spring washers 404 are provided between the elastic member 405 and the friction block 403 and between the thrust bearing 407 and the elastic member 405 to ensure uniform force transmission.

[0067] As an optimization, a limiting groove is opened on the spring washer, and the two ends of the elastic member are respectively abutted against the limiting groove of the spring washer, so as to improve the stability of the elastic member when working.

[0068] In combination with the above description of the structure and technical effects, the specific method of using a brake damping device in the present application is as follows:

[0069] The brake damping device is used in conjunction with a brake pedal. The device is installed on the brake pedal. When the brake pedal is stepped on, the brake arm is driven to move. The brake arm drives the rotating sleeve 402 to rotate, and then drives the rotating pressure ring 406 to move. Under the action of the rotational force, the rotating pressure ring 406 moves along the spiral groove 4012 of the fixed shaft 401, squeezing the elastic member 405. The elastic member 405 transmits the squeezing force to the friction block 403. The friction block 403 is forced to move along the slide groove 4011 of the tapered section and fits tightly with the inner wall of the rotating sleeve 402. The greater the squeezing force of the elastic member 405, the tighter the fit with the rotating sleeve 402.

[0070] During the entire pedaling process, the damping force changes from small to large.

[0071] When the pedal is released, under the action of the reverse force of the elastic member 405, it reacts on the rotating pressure ring 406, and the rotating pressure ring 406 moves outward along the spiral groove 4012 of the fixed shaft 401. The further the rotating pressure ring 406 moves outward, the smaller the reaction force of the elastic member 405. The magnitude of the damping force changes from large to small, thereby reducing the reaction force of the pedal during the release process. The changing damping force makes the driver experience more comfortable.

[0072] like Figure 3 As shown, the utility model records a brake pedal, which is equipped with the above-mentioned brake damping device 4. By installing the brake damping device 4, the foot feel during braking is improved and the comfort of braking the brake pedal is improved.

[0073] The brake pedal comprises a pedal base 1 , a nut 2 , a bolt shaft 3 , a brake damping device 4 , and a pedal arm 5 .

[0074] The brake damping device 4 is mounted on the pedal arm 5, and the rotating sleeve 402 on the brake damping device 4 is fixedly connected to the pedal arm 5. When the pedal arm 5 is braked, the brake damping device 4 starts to rotate to apply damping to the pedal arm 5, and when the pedal arm 5 is released, the brake damping device 4 rotates back to also apply damping to the rotation of the pedal arm 5.

[0075] The rotating sleeve 402 on the brake damping device 4 is fixed to the pedal arm 5 , and the brake damping device 4 and the pedal arm 5 are fixed to the pedal base 1 by the bolt shaft 3 and the nut 2 .

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0077] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

Claims

1. A brake damping device, characterized in that: include, Fixed axis (401); A rotating sleeve (402) is sleeved on the fixed shaft (401) and is rotationally connected to the fixed shaft (401); A friction member, disposed between the fixed shaft (401) and the rotating sleeve (402), movable along the axial direction of the fixed shaft, and used for adjusting the friction force between the rotating sleeve and the fixed sleeve; and a driving assembly, which is used for driving the friction member to move axially.

2. The brake damping device according to claim 1, characterized in that: The fixed shaft (401) is provided with a cylindrical section and a conical section; The cylindrical section of the fixed shaft (401) is provided with a spiral groove (4012), and the spiral groove (4012) is distributed in a spiral shape along the axial direction of the fixed shaft (401); The conical section of the fixed shaft (401) is provided with a slide groove (4011), and at least one slide groove (4011) is provided and distributed circumferentially along the conical surface of the conical section.

3. The brake damping device according to claim 2, characterized in that: The outer diameter of the conical section of the fixed shaft (401) gradually decreases from the outer end to the end close to the cylindrical section; the minimum outer diameter of the conical section of the fixed shaft (401) is smaller than the outer diameter of the cylindrical section of the fixed shaft (401).

4. The brake damping device according to claim 1, characterized in that: The inner side wall of the rotating sleeve (402) is provided with at least one guide groove (4021) along its axial direction, and the guide grooves (4021) are distributed in an annular shape along the inner side wall of the rotating sleeve (402).

5. The brake damping device according to claim 1, characterized in that: The friction member comprises a friction block (403), at least one of which is provided and installed in a sliding cooperation with the slide groove (4011); The friction block (403) is provided with an inner arc surface and an outer arc surface; the inner arc surface is in contact with the conical surface of the slide groove (4011), and the outer arc surface is in contact with the inner wall of the rotating sleeve (402); The shape of the inner arc surface of the friction block (403) matches the shape of the fitting surface of the sliding groove (4011) of the conical section.

6. The brake damping device according to claim 2, characterized in that: The driving assembly comprises a rotating pressure ring (406) and an elastic member (405), and a thrust bearing (407) is arranged between the rotating pressure ring (406) and the elastic member (405); The elastic member (405) is mounted on the cylindrical section of the fixed shaft (401), and two ends of the elastic member (405) are respectively in contact with the friction block (403) and the thrust bearing (407).

7. The brake damping device according to claim 6, characterized in that: The rotating pressure ring (406) is provided with a sliding boss (4061) and a rotating boss (4062); At least one sliding boss (4061) is provided, distributed on the outer ring surface of the rotating pressure ring (406), and is installed in a sliding manner with the guide groove (4021) provided on the inner side wall of the rotating sleeve (402); At least one rotating boss (4062) is provided and distributed on the inner ring surface of the rotating pressure ring (406). The rotating boss (4062) on the rotating pressure ring (406) is installed in a sliding fit with the spiral groove (4012) provided on the fixed shaft (401).

8. The brake damping device according to claim 6, characterized in that: Spring washers (404) are respectively arranged between the elastic member (405) and the friction block (403) and between the thrust bearing (407) and the elastic member (405).

9. The brake damping device according to claim 8, characterized in that: The spring washer (404) is provided with a limiting groove, and the end of the elastic member (405) abuts against the limiting groove of the spring washer (404).

10. A brake pedal, characterized in that: The invention comprises a brake damping device as described in any one of claims 1 to 9.

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