Low-dragging active return elastic mechanism, brake calipers and vehicle

Abstract

The utility model belongs to the technical field of automobiles, and discloses a low-dragging active return elastic mechanism, brake calipers and a vehicle. The low-dragging active return elastic mechanism is installed on the caliper support, the caliper support is provided with a support clamping groove, the low-dragging active return elastic mechanism comprises a first spring piece, the first spring piece comprises a clamping hook, a connecting section, an upper bent arc, a lower bent arc and a fixing part, the clamping hook and the connecting section are connected, the upper bent arc and the lower bent arc are connected, and the free end of the clamping hook is used for hooking the inner brake block or the outer brake block; the upper bent arc and the lower bent arc are located on the two sides of the support clamping groove respectively. The fixing part is connected with one end, deviating from the upper arc, of the lower arc, and at least part of the fixing part and the connecting section are jointly located in the support clamping groove. The low-dragging active return elastic mechanism, the brake calipers and the vehicle can be suitable for elastic return of a brake block of an electronic mechanical brake, elasticity is larger, the return effect is better, and zero dragging is better achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and in particular to a low-drag active return elastic mechanism, a brake caliper and a vehicle. Background Art

[0002] As the degree of electrification of automobile chassis continues to deepen, the demand for intelligent control of automobile chassis braking is getting higher and higher. At present, the execution structure of the chassis brake wheel end is still mainly based on traditional brake calipers, which generate braking force through hydraulic transmission. However, since traditional brake calipers themselves cannot generate braking force and cannot independently control the clamping and release of braking force, they cannot meet the needs of intelligent control, so the electronic mechanical brake system EMB came into being. At present, most of the calipers on the market only have parking EPB calipers, and electronic mechanical brake systems have not yet been mass-produced.

[0003] With the rapid development of automobiles, the requirements for automobile carbon emissions are getting higher and higher. At present, the main direction of global OEMs is low-energy new energy vehicles. Under the premise of ensuring the performance of various components of the automobile, research is conducted on how the components can meet the low-energy consumption requirements of customers. The demand for brakes is to reduce the drag as much as possible. At present, the mainstream vehicle customer demand is to reduce the drag of the brakes to below 0.5Nm, which is called the "zero drag" level. The key part to achieve the reduction of drag is the active return spring, and there are various active return springs on the market.

[0004] The existing active return spring is mainly used for hydraulic brakes. The spring force of this active return spring is within 30N. Too small a spring force is suppressed in achieving the effect of zero drag torque, making it very difficult to achieve the effect of zero drag torque.

[0005] Therefore, it is urgent to design a low-drag active return elastic mechanism, a brake caliper and a vehicle to solve the above problems. Utility Model Content

[0006] One purpose of the utility model is to provide a low-drag active return elastic mechanism, which can be applicable to the elastic return of the brake block of the electronic mechanical brake, has greater elasticity, better return effect, and better achieves zero drag.

[0007] Another object of the utility model is to provide a brake caliper that can achieve rapid return when the vehicle brakes are released.

[0008] Another object of the utility model is to provide a vehicle, which can reduce the drag feeling of the user when stopping and braking, and provide a better use experience.

[0009] To achieve this purpose, the utility model adopts the following technical solutions:

[0010] The low-drag active return elastic mechanism is installed on the caliper bracket, the caliper bracket is provided with a bracket slot, the low-drag active return elastic mechanism comprises a first spring sheet, and the first spring sheet comprises:

[0011] A connected hook and a connecting section, wherein the free end of the hook is used to hook the inner brake block or the outer brake block;

[0012] A connected upper curved arc and a lower curved arc, wherein the upper curved arc and the lower curved arc are respectively located on two sides of the bracket slot;

[0013] The fixing portion is connected to one end of the lower curved arc away from the upper curved arc, and at least part of the fixing portion and the connecting section are located together in the bracket slot.

[0014] As an optional solution, it also includes a first connecting arc and a second connecting arc connected to each other, the first connecting arc is connected to the upper curved arc and has the same bending direction as the upper curved arc, and the second connecting arc is connected to the connecting section and has the opposite bending direction to the first connecting arc.

[0015] As an optional solution, the height of the lower curved arc is H1, the height of the upper curved arc is H2, and H2>H1.

[0016] As an optional solution, the arc radius of the lower curved arc is R1, the arc radius of the upper curved arc is R2, and R2>R1.

[0017] As an optional solution, the radius of the first connecting arc is R3, the radius of the second connecting arc is R4, R1>R3, and R1>R4.

[0018] As an optional solution, the widths of the upper curved arc, the lower curved arc, the hook and the connecting section are all greater than or equal to 5 mm; and / or

[0019] The thickness of the upper curved arc, the lower curved arc, the hook and the connecting section are all greater than 0.3 mm.

[0020] As an optional solution, it also includes a second spring sheet, which is connected to the fixing portion and is constructed as a convex arc toward the inner brake block or the outer brake block, and the convex arc abuts against the bottom side of the inner brake block or the outer brake block.

[0021] As an optional solution, the first spring piece corresponding to the inner brake block and the first spring piece corresponding to the outer brake block are integrated through a connecting beam.

[0022] A brake caliper comprising the above-mentioned low-drag active return elastic mechanism.

[0023] A vehicle comprises the above-mentioned brake caliper.

[0024] The beneficial effects of the utility model are:

[0025] The utility model provides a low-drag active return elastic mechanism. When the low-drag active return elastic mechanism is in use, the hook hooks the inner brake block or the outer brake block. During braking, the brake block drives the hook to deform in the direction of the brake disc, so that the upper curved arc and the lower curved arc are deformed. When the braking is finished, the piston or the caliper body no longer applies pressure to the brake block, and the upper curved arc and the lower curved arc rebound to drive the hook to pull the brake block away from the brake disc, wherein the upper curved arc mainly plays a deformation role, and the lower curved arc mainly plays a supporting role. Such an arrangement enables the rebound force to reach more than 30N, the elasticity of the first spring sheet is greater, the return effect of the brake block is better, and zero drag is better achieved.

[0026] The utility model also provides a brake caliper, comprising the low-drag active return elastic mechanism. The brake caliper can achieve rapid return when the vehicle releases the brake by adopting the low-drag active return elastic mechanism.

[0027] The utility model also provides a vehicle, comprising the above-mentioned brake caliper. By adopting the above-mentioned brake caliper, the user's dragging feeling is reduced when stopping the brake, and the use feeling is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a brake caliper provided by an embodiment of the utility model;

[0029] Figure 2 is a cross-sectional view of a brake caliper provided by an embodiment of the utility model;

[0030] Figure 3 It is a structural schematic diagram of a low-drag active return elastic mechanism provided by an embodiment of the utility model;

[0031] Figure 4 is a cross-sectional view of a portion of a brake caliper provided by an embodiment of the utility model;

[0032] Figure 5 It is a structural schematic diagram of a portion of a brake caliper provided by an embodiment of the utility model;

[0033] Figure 6 It is a structural schematic diagram of a low-drag active return elastic mechanism provided by another embodiment of the utility model.

[0034] In the figure:

[0035] 210, brake disc; 220, caliper bracket; 221, clamping protrusion; 230, caliper body; 240, motor drive unit; 250, outer brake block; 260, inner brake block; 270, piston; 280, lead screw;

[0036] 10. first spring sheet; 11. downward curved arc; 12. upward curved arc; 13. connecting section; 14. hook; 15. fixing portion; 16. first connecting arc; 17. second connecting arc;

[0037] 20. second spring sheet;

[0038] 30. Upper spring clip; 40. Side spring clip; 50. Connecting beam. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] like Figure 1 and Figure 2 As shown, when the vehicle brakes, the motor drive unit 240 drives the lead screw 280 to rotate, and the lead screw 280 is threadedly connected to the piston 270, so that the piston 270 moves along its axial direction, and the piston 270 contacts the inner brake block 260 so that the inner brake block 260 abuts against the brake disc 210. At the same time, the caliper body 230 also abuts in the direction of the brake disc 210 under the reaction force of the piston 270, and the inner brake block 260 and the outer brake block 250 rub against the brake disc 210 to brake the brake disc 210. When the braking is completed, the motor drive unit 240 reverses, but the inner brake block 260 and the outer brake block 250 cannot return to their original positions, and a low-drag active return spring mechanism is required for return. The spring force of the return spring in the prior art is within 30N. An excessively small spring force is suppressed in achieving the effect of zero drag torque, and it is very difficult to achieve the effect of zero drag torque.

[0044] In order to solve the above problems, this embodiment provides a low-drag active return elastic mechanism, which can be applied to the elastic return of the brake pad of the electronic mechanical brake, has greater elasticity, better return effect, and better achieves zero drag. Figure 2 and Figure 3 As shown, the low-drag active return elastic mechanism is installed on the caliper bracket 220, and the caliper bracket 220 is provided with a bracket slot (not marked). The low-drag active return elastic mechanism includes a first spring sheet 10, and the first spring sheet 10 includes a connected hook 14 and a connecting section 13, a connected upper curved arc 12 and a lower curved arc 11, and a fixing portion 15. The free end of the hook 14 is used to hook the inner brake block 260 or the outer brake block 250; the upper curved arc 12 and the lower curved arc 11 are respectively located on both sides of the bracket slot; the fixing portion 15 is connected to one end of the lower curved arc 11 away from the upper curved arc 12, and at least part of the fixing portion 15 and the connecting section 13 are located together in the bracket slot.

[0045] When the above-mentioned low-drag active return elastic mechanism is in use, the hook 14 hooks the inner brake block 260 or the outer brake block 250 (hereinafter collectively referred to as the brake block). During braking, the brake block drives the hook 14 to deform in the direction of the brake disc 210, so that the upper curved arc 12 and the lower curved arc 11 are deformed. When the braking is completed, the piston 270 or the caliper body 230 no longer applies pressure to the brake block, and the upper curved arc 12 and the lower curved arc 11 rebound to drive the hook 14 to pull the brake block away from the brake disc 210, wherein the upper curved arc 12 mainly plays a deformation role, and the lower curved arc 11 mainly plays a supporting role. This arrangement enables the rebound force to reach more than 30N, the first spring leaf 10 has greater elasticity, the brake block has a better return effect, and zero drag is better achieved.

[0046] Alternatively, if Figure 3 As shown, the low-drag active return elastic mechanism further includes a first connecting arc 16 and a second connecting arc 17 connected to each other, wherein the first connecting arc 16 is connected to the upper curved arc 12 and has the same bending direction as the upper curved arc 12, and the second connecting arc 17 is connected to the connecting section 13 and has a bending direction opposite to that of the first connecting arc 16. The above arrangement forms two arc sections in opposite directions between the connecting section 13 and the upper curved arc 12, thereby increasing the deformation of the part, improving the strength of the part, and thus extending the service life of the first spring leaf 10.

[0047] See also Figure 3 and Figure 4 The arc radius of the lower curved arc 11 is R1, and the arc radius of the upper curved arc 12 is R2, R2>R1. Such a design ratio can ensure that the deformation of the lower curved arc 11 is small, and it mainly plays the role of adjusting the position and supporting the upper curved arc 12. The upper curved arc 12 mainly provides elastic force and undergoes elastic deformation.

[0048] Furthermore, if Figure 3 and Figure 4 As shown, the radius of the first connecting arc 16 is R3, and the radius of the second connecting arc 17 is R4, R1>R3, and R1>R4, that is, the smaller the radius, the better the effect of improving strength. This setting ensures that the deformation of the upper curved arc 12 is maximized, while improving the strength of the upper curved arc 12 and the connecting section 13.

[0049] Alternatively, if Figure 3 and Figure 4 As shown, the height of the lower curved arc 11 is H1, and the height of the upper curved arc 12 is H2, H2>H1. The above arrangement further ensures that the deformation of the lower curved arc 11 is small, and mainly plays the role of adjusting the position and supporting the upper curved arc 12. The upper curved arc 12 mainly provides elastic force and undergoes elastic deformation.

[0050] In this embodiment, H1=2mm, R1=1.5mm, H2=8mm, and R2=4mm, which can be adjusted according to actual conditions during implementation.

[0051] Optionally, a recessed area is formed between the upper curved arc 12 and the lower curved arc 11 for a smooth transition, so that the entire first spring sheet 10 is roughly in the shape of an ear, the connection strength at this location is enhanced, and the supporting strength of the lower curved arc 11 on the upper curved arc 12 is further improved.

[0052] Optionally, the widths of the upper curved arc 12, the lower curved arc 11, the hook 14 and the connecting section 13 are all greater than or equal to 5 mm. The above setting appropriately widens the widths of the upper curved arc 12, the lower curved arc 11, the hook 14 and the connecting section 13, so that the elastic force of the first spring sheet 10 can reach more than 30N.

[0053] In another embodiment, the thickness of the upper curved arc 12, the lower curved arc 11, the hook 14 and the connecting section 13 are all greater than 0.3 mm. That is, by increasing the thickness of the first spring sheet 10, the effect of increasing the resilience can also be achieved, which is not limited here.

[0054] Alternatively, see Figure 3 and Figure 5 The low-drag active return elastic mechanism further includes a second spring sheet 20, which is connected to the fixing portion 15, and is configured as a convex arc facing the inner brake block 260 or the outer brake block 250, and the convex arc abuts against the bottom side of the inner brake block 260 or the outer brake block 250. It can be understood that the convex arc of the second spring sheet 20 provides an upward elastic force for the brake block, and the upward elastic force can suppress the up and down movement of the brake block during the vibration process, thereby improving the stability of the braking process or the resetting process.

[0055] Alternatively, see Figure 3 and Figure 5 The low-drag active return elastic mechanism also includes an upper spring clip 30, which is connected to the fixing portion 15 and has a generally U-shaped cross-section. The caliper bracket 220 is provided with a clamping protrusion 221. The upper spring clip 30 and the clamping protrusion 221 are clamped with each other, providing a limited fixation in the upper and lower directions for the low-drag active return elastic mechanism.

[0056] Alternatively, see Figure 3 and Figure 5 The low-drag active return elastic mechanism also includes a side spring clip 40, which is clamped with the main arm of the caliper bracket 220 to provide left and right direction (i.e., axial direction of the piston 270) limitation for the low-drag active return elastic mechanism, so that the low-drag active return elastic mechanism remains basically fixed on the caliper bracket 220.

[0057] Optionally, in this embodiment, four low-drag active return elastic mechanisms are provided, and low-drag active return elastic mechanisms are provided at both ends of the outer brake block 250 and both ends of the inner brake block 260 to ensure the balance of the force on the brake blocks.

[0058] In this embodiment, the four low-drag active return elastic mechanisms are independent of each other.

[0059] In another embodiment, Figure 6 As shown, the first spring sheet 10 corresponding to the inner brake block 260 and the first spring sheet 10 corresponding to the outer brake block 250 are integrated through the connecting beam 50. This arrangement improves the installation speed of the low-drag active return elastic mechanism and can also realize the installation of two low-drag active return elastic mechanisms on the caliper bracket 220 at one time.

[0060] This embodiment further provides a brake caliper, comprising the low-drag active return elastic mechanism. The brake caliper can achieve rapid return when the vehicle releases the brakes by adopting the low-drag active return elastic mechanism.

[0061] This embodiment also provides a vehicle, including the above-mentioned brake caliper. By adopting the above-mentioned brake caliper, the vehicle reduces the drag feeling of the user when stopping the brake, and the user experience is better.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A low-drag active return elastic mechanism is installed on a caliper bracket (220), wherein the caliper bracket (220) is provided with a bracket slot, characterized in that: The low-drag active return elastic mechanism comprises a first spring sheet (10), wherein the first spring sheet (10) comprises: A connected hook (14) and a connecting section (13), wherein the free end of the hook (14) is used to hook an inner brake block (260) or an outer brake block (250); An upper curved arc (12) and a lower curved arc (11) are connected, wherein the upper curved arc (12) and the lower curved arc (11) are respectively located on two sides of the bracket slot; The fixing portion (15) is connected to an end of the lower curved arc (11) away from the upper curved arc (12), and at least part of the fixing portion (15) and the connecting section (13) are located together in the bracket slot.

2. The low-drag active return elastic mechanism according to claim 1, characterized in that: It also comprises a first connecting arc (16) and a second connecting arc (17) connected to each other, wherein the first connecting arc (16) is connected to the upper curved arc (12) and has the same bending direction as the upper curved arc (12), and the second connecting arc (17) is connected to the connecting section (13) and has a bending direction opposite to that of the first connecting arc (16).

3. The low-drag active return elastic mechanism according to claim 2, characterized in that: The height of the lower curved arc (11) is H1, and the height of the upper curved arc (12) is H2, where H2>H1.

4. The low-drag active return elastic mechanism according to claim 3, characterized in that: The arc radius of the lower curved arc (11) is R1, and the arc radius of the upper curved arc (12) is R2, where R2>R1.

5. The low-drag active return elastic mechanism according to claim 4, characterized in that: The radius of the first connecting arc (16) is R3, the radius of the second connecting arc (17) is R4, R1>R3, and R1>R4.

6. The low-drag active return elastic mechanism according to any one of claims 1 to 5, characterized in that: The widths of the upper curved arc (12), the lower curved arc (11), the hook (14) and the connecting section (13) are all greater than or equal to 5 mm; and / or The thickness of the upper curved arc (12), the lower curved arc (11), the hook (14) and the connecting section (13) are all greater than 0.3 mm.

7. The low-drag active return elastic mechanism according to any one of claims 1 to 5, characterized in that: The invention also comprises a second spring sheet (20), wherein the second spring sheet (20) is connected to the fixing portion (15), and the second spring sheet (20) is configured as a convex arc facing the inner brake block (260) or the outer brake block (250), and the convex arc abuts against the bottom side of the inner brake block (260) or the outer brake block (250).

8. The low-drag active return elastic mechanism according to claim 1, characterized in that: The first spring piece (10) corresponding to the inner brake block (260) and the first spring piece (10) corresponding to the outer brake block (250) are integrated via a connecting beam (50).

9. A brake caliper, characterized in that: It comprises a low-drag active return elastic mechanism as described in any one of claims 1-8.

10. A vehicle, characterized in that Comprising a brake caliper as claimed in claim 9.

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