Pressure relief type anti-lock driving piston mechanism, disc brake and electric vehicle

Abstract

The utility model provides a pressure relief type anti-lock driving piston mechanism, a disc brake and an electric vehicle, and relates to the technical field of electric vehicle brakes, the pressure relief type anti-lock driving piston mechanism comprises a piston body, an elastic reset piece and a top sleeve, the piston body is internally provided with a pressure relief cavity, and the elastic reset piece is arranged in the top sleeve; the first end of the piston body is communicated with the pressure relief cavity and is provided with an opening, and the second end of the piston body is communicated with the pressure relief cavity and is provided with an exhaust hole; the top sleeve is inserted into the pressure relief cavity along the opening, and the piston body is in sliding fit with the top sleeve; the elastic reset piece is arranged in the pressure relief cavity, and the two ends of the elastic reset piece are connected with the piston body and the ejector sleeve respectively. According to the utility model, the piston body, the elastic reset piece and the top sleeve are matched with one another, so that the pressure is relieved in a way of discharging gas in the pressure relief cavity in the braking process, the braking locking can be effectively prevented, and the safety and reliability of a vehicle are improved on the basis of ensuring the braking distance.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle brakes, in particular to a pressure relief anti-lock driving piston mechanism, a disc brake and an electric vehicle. Background Art

[0002] Electric vehicles are a type of transportation that uses batteries as energy. With its advantages of being green, environmentally friendly, easy to use, and low cost, it has become people's preferred means of transportation.

[0003] Existing two-wheeled and three-wheeled electric vehicles use braking systems such as front disc and rear drum, front and rear dual discs, CBS (combined brake) and ABS (anti-lock braking system). The disc brake device usually works by hydraulically pushing the piston movement. Existing disc brake devices have the risk of locking the front / rear wheels when braking too quickly, thereby causing a safety hazard of falling off the vehicle. Therefore, during driving, manual operation of the brake handle is required to achieve a relatively safe braking effect. This method is inconvenient to operate. In emergency braking scenarios, it may cause the vehicle to skid or fall off due to wheel locking.

[0004] Therefore, an anti-lock disc brake suitable for products such as electric bicycles and electric motorcycles, which can meet users' demand for cost-effectiveness and effectively prevent wheel locking and eliminate safety hazards, is urgently needed to be invented. Utility Model Content

[0005] The purpose of the present invention is to provide a pressure relief anti-lock braking drive piston mechanism, a disc brake and an electric vehicle to solve the above-mentioned technical problems existing in the prior art; the preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects; see the following for details.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The utility model provides a pressure relief anti-lock driving piston mechanism, comprising a piston body, an elastic return member and a top sleeve, wherein: a pressure relief chamber is provided inside the piston body, a first end of the piston body is connected to the pressure relief chamber and is provided with an opening, and a second end of the piston body is connected to the pressure relief chamber and is provided with an exhaust hole; the top sleeve is inserted into the pressure relief chamber along the opening, and the piston body and the top sleeve are slidably matched; the elastic return member is provided in the pressure relief chamber, and its two ends are respectively connected to the piston body and the top sleeve.

[0008] Preferably, a storage chamber is provided on the outer end surface of the second end of the piston body; and the pressure relief chamber is communicated with the storage chamber through the exhaust hole.

[0009] Preferably, the pressure relief anti-lock braking drive piston mechanism includes a fixing member, the inner wall of the piston body is provided with a first mounting portion, and the fixing member is provided on the first mounting portion for limiting the top sleeve.

[0010] Preferably, a plurality of first mounting parts are axially arranged on the inner wall of the piston body, the fixing part is detachably connected to the first mounting part, and the fixing part can be installed to any of the first mounting parts to adjust the elastic force value of the elastic reset part; the fixing part is configured as a retaining spring, the first mounting part is configured as a first annular groove, and the retaining spring is adapted to the first annular groove.

[0011] Preferably, the pressure relief anti-lock braking drive piston mechanism also includes a seal, a second mounting portion is provided on the outer wall of the top sleeve, and the seal is provided on the second mounting portion for sealing the top sleeve and the piston body; a plurality of second mounting portions are provided on the outer wall of the top sleeve along the axial direction, the seal is detachably connected to the second mounting portion, and each second mounting portion is provided with the seal; the seal is configured as a sealing ring, the second mounting portion is configured as a second annular groove, and the sealing ring is adapted to the second annular groove.

[0012] Preferably, the piston body is configured as a cylindrical structure with one end open; the top sleeve is configured as a cylindrical structure with one end open; the inner diameter of the piston body matches the outer diameter of the top sleeve; the elastic reset member is arranged inside the piston body and the top sleeve.

[0013] Preferably, the inner end wall of the piston body is provided with a first mounting boss; the inner end wall of the top sleeve is provided with a second mounting boss, and the first mounting boss and the second mounting boss are arranged opposite to each other; the two ends of the elastic return member are respectively sleeved on the first mounting boss and the second mounting boss.

[0014] The utility model provides a disc brake, comprising any one of the aforementioned pressure relief anti-lock driving piston mechanisms.

[0015] Preferably, the disc brake includes a brake handle, an upper brake pump, a brake oil pipe, a lower brake pump, a brake pad and a brake disc, wherein: the brake handle, the upper brake pump, the brake oil pipe and the lower brake pump are connected in sequence; the output end of the lower brake pump is connected to the brake pad through the pressure relief anti-lock driving piston mechanism, and can push the brake pad to resist the brake disc through the pressure relief anti-lock driving piston mechanism.

[0016] The utility model provides an electric vehicle comprising any one of the above-mentioned disc brakes.

[0017] The utility model provides a pressure relief anti-lock driving piston mechanism, a disc brake, and an electric vehicle, which have at least the following beneficial effects:

[0018] The pressure relief anti-lock braking driving piston mechanism comprises a piston body, an elastic return member and a top sleeve, which cooperate with each other to be used for anti-lock braking.

[0019] A pressure relief chamber is provided inside the piston body, a first end of the piston body is communicated with the pressure relief chamber and is provided with an opening, a second end of the piston body is communicated with the pressure relief chamber and is provided with an exhaust hole, the top sleeve is inserted into the pressure relief chamber along the opening, the piston body and the top sleeve are slidably matched, and in actual use, the top sleeve is connected to the brake block, and when braking, the brake pump drives the piston mechanism to move, so that the brake block abuts the brake disc, and friction realizes braking. In this process, the piston body and the top sleeve move relative to each other, so that the gas inside the pressure relief chamber is discharged through the exhaust hole, thereby playing a role of pressure relief, which can effectively prevent the brake from locking, and the anti-lock effect is significant.

[0020] The elastic return member is arranged in the pressure relief chamber, and its two ends are respectively connected to the piston body and the top sleeve. During the braking process, the piston body and the top sleeve undergo relative displacement, which causes the elastic return member to deform. When the braking is completed, the elastic return member in the deformed state generates elastic force to act on the piston body and the top sleeve, causing the two to return to their initial positions.

[0021] The utility model cooperates with the piston body, the elastic reset member and the top sleeve to release the pressure in the pressure relief chamber during braking, which can effectively prevent the brake from locking and effectively improve the safety and reliability of the vehicle while ensuring the braking distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of the pressure relief anti-lock braking drive piston mechanism of the utility model from one perspective;

[0024] Figure 2 This is a structural diagram of the pressure relief anti-lock braking drive piston mechanism of the utility model from another perspective;

[0025] Figure 3 This is an exploded schematic diagram of the pressure relief anti-lock braking drive piston mechanism of the utility model;

[0026] Figure 4 It is a cross-sectional schematic diagram of the piston body of the utility model;

[0027] Figure 5 It is a cross-sectional schematic diagram of the top cover of the utility model;

[0028] Figure 6 This is a schematic cross-sectional view of a piston body provided with a plurality of first annular mounting grooves according to the present invention;

[0029] Figure 7 This is a schematic diagram of the assembly of the disc brake of the utility model;

[0030] Figure 8 This is a structural diagram of the utility model's opposed single-cylinder disc brake;

[0031] Figure 9 This is a structural diagram of the utility model single-cylinder disc brake;

[0032] Figure 10 It is a structural diagram of the multi-cylinder disc brake of the utility model.

[0033] Reference numerals

[0034] 1. Pressure-relief anti-lock brake drive piston mechanism; 11. Piston body; 111. Pressure-relief chamber; 112. Opening; 113. Exhaust hole; 114. First annular groove; 115. First mounting boss; 116. Storage chamber; 12. Elastic return member; 13. Top sleeve; 131. Second annular groove; 132. Second mounting boss; 14. Fixing member; 15. Sealing member; 2. Brake handle; 3. Brake upper pump; 4. Brake oil pipe; 5. Brake lower pump; 6. Brake pad; 7. Brake disc. DETAILED DESCRIPTION

[0035] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] Example 1:

[0037] The utility model provides a pressure relief anti-lock braking drive piston mechanism 1, referring to Figures 1 to 6 As shown, the pressure relief anti-lock braking driving piston mechanism 1 includes a piston body 11 , an elastic return member 12 and a top sleeve 13 .

[0038] A pressure relief chamber 111 is provided inside the piston body 11 . An opening 112 is provided at a first end of the piston body 11 in communication with the pressure relief chamber 111 . An exhaust hole 113 is provided at a second end of the piston body 11 in communication with the pressure relief chamber 111 .

[0039] The top sleeve 13 is inserted into the pressure relief chamber 111 along the opening 112 . The top sleeve 13 is adapted to the size of the pressure relief chamber 111 . The inner wall of the piston body 11 and the outer wall of the top sleeve 13 are slidably matched.

[0040] The elastic return member 12 is disposed in the pressure relief chamber 111 , and its two ends are connected to the piston body 11 and the top sleeve 13 respectively.

[0041] In actual use, the piston body 11 is connected to the output end of the brake lower pump 5, and the top sleeve 13 is connected to the brake pad 6. During braking, the brake lower pump 5 is activated to push the piston body 11 to move. The piston body 11 drives the top sleeve 13 to move through the elastic reset member 12. The top sleeve 13 pushes the brake pad 6 to move and resists against the brake disc 7. The friction between the two realizes braking.

[0042] During the above process, relative sliding occurs between the piston body 11 and the top sleeve 13, squeezing the gas in the pressure relief chamber 111 and causing it to be slowly discharged through the exhaust hole 113, thereby relieving pressure and effectively preventing the brake pad 6 from locking the brake disc 7 due to emergency braking.

[0043] At the same time, as the piston body 11 and the top sleeve 13 slide relative to each other, the elastic return member 12 is deformed. When the braking is completed, the elastic return member 12 in the deformed state can push the piston body 11 and the top sleeve 13 to return to their initial positions.

[0044] The utility model realizes pressure relief by exhausting the pressure relief chamber 111 during emergency braking through the cooperation between the piston body 11, the elastic reset member 12 and the top sleeve 13, and has a significant anti-lock effect. On the basis of ensuring the braking distance, the safety and reliability of the vehicle are greatly improved.

[0045] Example 2:

[0046] Example 2 is based on Example 1:

[0047] like Figures 1 to 6 As shown, a storage chamber 116 is provided on the outer end surface of the second end of the piston body 11 ; the pressure relief chamber 111 is connected to the storage chamber 116 through the exhaust hole 113 , and the storage chamber 116 is used for temporary storage of gas.

[0048] During the pressure relief process, the gas in the pressure relief chamber 111 enters the storage chamber 116 through the exhaust hole 113 .

[0049] During the process of the piston body 11 and the top sleeve 13 returning to their original positions, the gas temporarily stored in the storage chamber 116 flows back into the pressure relief chamber 111 through the exhaust hole 113 .

[0050] In actual application, the volume of the storage chamber 116 is adjusted and set according to the vehicle speed, braking distance, etc.

[0051] As an optional embodiment, the pressure relief anti-lock braking driving piston mechanism 1 includes a fixing member 14 . The inner wall of the piston body 11 is provided with a first mounting portion, and the fixing member 14 is provided on the first mounting portion.

[0052] The fixing member 14 is used to limit the top sleeve 13 and can effectively ensure the thrust value of the elastic reset member 12.

[0053] As an optional embodiment, a plurality of the first mounting portions are axially provided on the inner wall of the piston body 11 , and the fixing member 14 is detachably connected to the first mounting portion.

[0054] During actual use, the fixing member 14 is installed on the corresponding first installation portion according to actual needs, so that the elastic force value of the elastic reset member 12 can be adjusted.

[0055] The elastic return member 12 is a spring. When the piston body 11 and the top sleeve 13 slide relative to each other, the spring is compressed and deformed.

[0056] The fixing member 14 is configured as a retaining spring, and the first mounting portion is configured as a first annular groove 114 . The retaining spring is adapted to the first annular groove 114 . Thus, the fixing member 14 has a firm structure when installed and is easy to operate when assembled and disassembled.

[0057] The first annular groove 114 is a retaining spring groove. The multiple first annular grooves 114 distributed along the axial direction form a multi-stage retaining spring groove. The multi-stage retaining spring groove provides multiple installation positions for the retaining spring. By installing the retaining spring to different installation positions, the elastic force value of the elastic return member 12 can be adjusted.

[0058] As an optional embodiment, the pressure relief anti-lock braking drive piston mechanism 1 further includes a seal 15 . A second mounting portion is provided on the outer wall of the top sleeve 13 , and the seal 15 is provided on the second mounting portion.

[0059] The seal 15 is used to seal between the top sleeve 13 and the piston body 11, so that the driving piston mechanism has good air tightness.

[0060] As an optional embodiment, the outer wall of the top sleeve 13 is axially provided with multiple second mounting parts, and the seal 15 is detachably connected to the second mounting part. Each second mounting part is provided with a seal 15, and multiple groups of seals 15 are used to further improve the sealing effect.

[0061] The sealing member 15 is configured as a sealing ring, and the second mounting portion is configured as a second annular groove 131 . The sealing ring is matched with the second annular groove 131 , so that the sealing ring can be easily assembled and disassembled.

[0062] By setting up multi-level retaining ring grooves and multi-layer sealing rings, the exhaust volume during braking is precisely controlled to achieve the best anti-lock effect.

[0063] As an optional embodiment, the piston body 11 is configured as a cylindrical structure with one end open; the top sleeve 13 is configured as a cylindrical structure with one end open, the opening of the piston body 11 and the opening of the top sleeve 13 are arranged opposite to each other, the inner diameter of the piston body 11 and the outer diameter of the top sleeve 13 are matched, and the elastic return part 12 is arranged inside the piston body 11 and the top sleeve 13.

[0064] In this way, the structure is compact, which can effectively reduce the volume of the entire pressure relief anti-lock driving piston mechanism 1 and improve its space utilization, while having good air tightness to ensure the braking and anti-lock effects.

[0065] As an optional embodiment, the inner end wall of the piston body 11 is provided with a first mounting boss 115; the inner end wall of the top sleeve 13 is provided with a second mounting boss 132, and the first mounting boss 115 and the second mounting boss 132 are arranged opposite to each other; the two ends of the elastic return member 12 are respectively mounted on the first mounting boss 115 and the second mounting boss 132.

[0066] The first mounting boss 115 and the second mounting boss 132 cooperate with each other to stably mount the elastic return member 12 .

[0067] Furthermore, to facilitate the installation of the elastic return member 12 , the first mounting boss 115 and the second mounting boss 132 are both configured to be truncated cone-shaped.

[0068] Example 3

[0069] Example 3 is based on Example 2:

[0070] The utility model provides a disc brake, such as Figure 7 As shown, the disc brake includes a pressure relief anti-lock braking drive piston mechanism 1.

[0071] The disc brake with the pressure relief anti-lock driving piston mechanism 1 can effectively prevent the brake pad 6 from locking the brake disc 7 during emergency braking, thereby preventing the wheel from locking, and the braking effect is significant.

[0072] As an optional embodiment, the disc brake includes a brake handle 2, a brake upper pump 3, a brake oil pipe 4, a brake lower pump 5, a brake pad 6 and a brake disc 7. The brake handle 2, the brake upper pump 3, the brake oil pipe 4 and the brake lower pump 5 are connected in sequence; the output end of the brake lower pump 5 is connected to the brake pad 6 through a pressure relief anti-lock driving piston mechanism 1, and the output end of the brake lower pump 5 is the telescopic action end of its piston.

[0073] During braking, the user controls the upper brake pump 3 through the brake handle 2, and delivers the hydraulic oil to the lower brake pump 5 through the brake oil pipe 4. The lower brake pump 5 moves to push the pressure relief anti-lock brake driving piston mechanism 1 to move, and the pressure relief anti-lock brake driving piston mechanism 1 drives the brake pad 6 to press against the brake disc 7, thereby achieving braking of the entire vehicle.

[0074] In the prior art, since the thrust is increased during emergency braking, the brake pad 6 may lock the brake disc 7, thereby affecting safety.

[0075] In the present invention, during the above braking process, the pressure relief anti-lock driving piston mechanism 1 slowly releases air through the exhaust hole 113, thereby achieving the function of pressure relief and further achieving the anti-lock braking function, which can greatly improve safety and reliability while ensuring the braking effect.

[0076] The disc brake of the present invention is applicable to opposed disc brakes, single-cylinder disc brakes or multi-cylinder disc brakes, etc.

[0077] like Figure 8 As shown, Figure 8 It is a structural diagram of an opposed disc brake, which includes two pressure relief anti-lock driving piston mechanisms 1 arranged opposite to each other. Under the action of a brake pump, the two brake blocks 6 on the left and right sides respectively drive the brake disc 7 to clamp the brake pads 6 on the left and right sides.

[0078] like Figure 9 As shown, Figure 9 It is a structural diagram of a single-cylinder disc brake, which includes a pressure relief anti-lock braking drive piston mechanism 1. The brake pump drives the brake pad 6 to press against the brake disc 7 through the pressure relief anti-lock braking drive piston mechanism 1.

[0079] like Figure 10 As shown, Figure 10 It is a structural diagram of a multi-cylinder disc brake, which includes multiple pressure relief anti-lock driving piston mechanisms 1. Multiple pressure relief anti-lock driving piston mechanisms 1 have greater braking force.

[0080] Example 4

[0081] Example 4 is based on Example 3:

[0082] The utility model provides an electric vehicle, which comprises the disc brake.

[0083] The electric vehicle using the disc brake has a good anti-lock braking function and can greatly improve the safety and reliability of the entire vehicle driving process.

[0084] In the description of this application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" or "several" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0086] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0087] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A pressure relief anti-lock braking drive piston mechanism, characterized in that: It includes a piston body, an elastic reset member and a top sleeve, wherein: A pressure relief chamber is provided inside the piston body, a first end of the piston body is connected to the pressure relief chamber and is provided with an opening, and a second end of the piston body is connected to the pressure relief chamber and is provided with an exhaust hole; The top sleeve is inserted into the pressure relief chamber along the opening, and the piston body and the top sleeve are slidably matched; The elastic return member is arranged in the pressure relief chamber, and two ends thereof are connected to the piston body and the top sleeve respectively.

2. The pressure relief anti-lock braking drive piston mechanism according to claim 1, characterized in that: A storage cavity is provided on the outer end surface of the second end of the piston body; The pressure relief chamber is communicated with the storage chamber through the exhaust hole.

3. The pressure relief anti-lock braking drive piston mechanism according to claim 1, characterized in that: The pressure relief anti-lock braking drive piston mechanism includes a fixing member. The inner wall of the piston body is provided with a first mounting portion. The fixing member is provided on the first mounting portion and is used for limiting the top sleeve.

4. The pressure relief anti-lock braking drive piston mechanism according to claim 3, characterized in that: A plurality of first mounting portions are axially provided on the inner wall of the piston body, the fixing member is detachably connected to the first mounting portion, and the fixing member can be mounted to any of the first mounting portions to adjust the elastic force value of the elastic reset member; The fixing member is configured as a clip, the first mounting portion is configured as a first annular groove, and the clip is adapted to the first annular groove.

5. The pressure relief anti-lock braking drive piston mechanism according to claim 1, characterized in that: The pressure relief anti-lock braking drive piston mechanism further includes a sealing member, a second mounting portion is provided on the outer wall of the top sleeve, and the sealing member is provided on the second mounting portion for sealing the top sleeve and the piston body; The outer wall of the top sleeve is provided with a plurality of second mounting parts along the axial direction, the sealing member is detachably connected to the second mounting part, and each second mounting part is provided with the sealing member; The sealing member is configured as a sealing ring, the second mounting portion is configured as a second annular groove, and the sealing ring is adapted to the second annular groove.

6. The pressure relief anti-lock braking drive piston mechanism according to claim 1, characterized in that: The piston body is configured as a cylindrical structure with one end open; The top sleeve is configured as a cylindrical structure with one end open; The inner diameter of the piston body matches the outer diameter of the top sleeve; The elastic return member is arranged inside the piston body and the top sleeve.

7. The pressure relief anti-lock braking drive piston mechanism according to claim 1, characterized in that: The inner end wall of the piston body is provided with a first mounting boss; The inner end wall of the top sleeve is provided with a second mounting boss, and the first mounting boss and the second mounting boss are arranged opposite to each other; Two ends of the elastic reset member are respectively sleeved on the first mounting boss and the second mounting boss.

8. A disc brake, characterized in that: The invention comprises the pressure relief anti-lock braking drive piston mechanism according to any one of claims 1 to 7.

9. The disc brake according to claim 8, characterized in that: The disc brake comprises a brake handle, an upper brake pump, a brake oil pipe, a lower brake pump, a brake pad and a brake disc, wherein: The brake handle, the upper brake pump, the brake oil pipe and the lower brake pump are connected in sequence; The output end of the brake lower pump is connected to the brake pad via the pressure relief anti-lock brake driving piston mechanism, and can push the brake pad to abut against the brake disc via the pressure relief anti-lock brake driving piston mechanism.

10. An electric vehicle, characterized in that: Including the disc brake according to claim 8 or 9.

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