An electromechanical brake caliper and brake

Abstract

This application discloses an electromechanical brake caliper and brake. The electromechanical brake caliper includes a caliper body and a mounting bracket. The caliper body is slidably connected to the mounting bracket via guide posts. The two caliper arms of the caliper body are connected along their main force direction via a connecting assembly to apply a preload pressure to the caliper body to resist brake opening deformation. A connecting beam is provided between the clamps of the mounting bracket, extending along the width direction of the mounting bracket. This application, by applying a preload pressure between the two caliper arms of the caliper body via the connecting assembly, can effectively offset part of the braking load, reduce the stress amplitude of the caliper body, and delay fatigue damage. The connecting beam between the clamps of the mounting bracket increases the overall rigidity, allowing the braking friction torque to be shared by the connecting beam and the mounting position, reducing the peak torque borne by the mounting position. The connecting assembly and the connecting beam significantly improve the overall load-bearing capacity of the caliper and extend its service life.

Description

Technical Field

[0001] This application generally relates to the field of vehicle braking technology. More specifically, this application relates to an electromechanical brake caliper and brake. Background Technology

[0002] With the gradual adoption of electromechanical braking technology in the mining machinery industry, the reliability and service life of electromechanical brake calipers, as the core actuators of the system, directly affect the operational safety and maintenance costs of mining trucks. Compared to traditional hydraulic brake calipers, electromechanical brake calipers, due to the need for a motor drive mechanism on one side, typically adopt a floating caliper structure design. This means the caliper body is slidably connected to the mounting bracket via guide posts, and during braking, a piston pushes the brake pads to press against the brake disc to generate braking force.

[0003] However, existing electromechanical brake calipers, when applied to heavy-duty mining trucks weighing over 150 tons, are limited by the load-bearing capacity of their floating structure and struggle to adapt to extremely harsh braking conditions. These mining trucks experience extremely high braking loads, with a single caliper exerting a braking force of up to 400kN on both sides. They are also subjected to high-intensity braking scenarios such as heavy-load downhill driving and frequent start-stop operations, resulting in violent and frequent braking actions. Under these conditions, the reaction force of the braking force repeatedly acts on both sides of the caliper, forcing the caliper to open and deform, and causing... Figure 1 The four characteristic regions A, B, C, and D of the clamp body in the brake pads cause severe stress concentration; at the same time, the braking friction force is transmitted to the mounting bracket via the brake pads, causing the attached... Figure 2 The mounting brackets at positions E and F in the system are subjected to enormous torque and deformation. Under continuous alternating loads, fatigue damage accumulates rapidly in these high-stress areas, ultimately leading to frequent fatigue fractures of the clamp body and mounting bracket in these regions. Actual application data shows that the service life of existing products is only a few months, severely restricting the reliability of the braking system and driving safety, while significantly increasing the maintenance costs and downtime of mining trucks.

[0004] In view of this, there is an urgent need to provide an electromechanical brake caliper and brake solution in order to effectively improve the load-bearing capacity of the caliper body and mounting bracket and extend their service life. Summary of the Invention

[0005] In order to at least solve one or more of the technical problems mentioned above, this application proposes an electromechanical brake caliper and brake solution with high load-bearing capacity and long service life in several aspects.

[0006] In a first aspect, this application provides an electromechanical brake caliper, including a caliper body and a mounting bracket. The caliper body is slidably connected to the mounting bracket via guide posts to form a floating caliper structure. The two caliper arms of the caliper body are connected along their main force direction via a connecting assembly to apply a pre-tightening pressure to the caliper body to resist brake opening deformation. A connecting beam is provided between the clamps of the mounting bracket, and the connecting beam extends along the width direction of the mounting bracket to improve overall rigidity and share the braking friction torque.

[0007] In some embodiments, a preload element disposed between the two clamp arms is further included, the preload element being used to apply an initial preload force to the connecting assembly to establish a preload-relief mechanism on the clamps.

[0008] In some embodiments, both the connecting components and the pretensioners are provided in two sets, with the two sets of pretensioners respectively located adjacent to a corresponding set of connecting components; there are two connecting beams respectively connected between two pairs of oppositely arranged clamps to connect the four clamps in pairs, and each connecting beam is located between a corresponding set of connecting components and the pretensioners.

[0009] In some embodiments, the height of the connecting beam is higher than the connecting assembly but lower than the height of the pretensioner.

[0010] In some embodiments, the connecting beam is disposed on the mounting bracket at a position corresponding to the contact surface of the brake pad.

[0011] In some embodiments, the clip has a vertically arranged extension above it, and the connecting beam is disposed at the extended end of the extension.

[0012] In some embodiments, the clamp body has a protrusion on its clamp arm, the protrusion having an assembly hole for mounting the connecting assembly and an installation hole for mounting the preload; along the length of the clamp body, the assembly hole is located outside the installation hole.

[0013] In some embodiments, the connecting assembly includes a support pin and a mounting sleeve fitted around the outer periphery of the support pin; one end of the support pin is provided with a threaded portion and the other end is provided with a limiting portion; the support pin passes through a mounting hole on one of the clamp arms and is threadedly connected to a mounting hole on another clamp arm, and the limiting portion is locked at the mounting hole through which the support pin passes; both ends of the mounting sleeve abut against the inner sidewalls of the two mounting holes respectively.

[0014] In some embodiments, the preload member has the same structure as the support pin, and the mounting hole that mates with the threaded portion of the preload member is a blind hole.

[0015] In a second aspect, this application provides an electromechanical brake for mining trucks, including the electromechanical brake caliper described above.

[0016] The electromechanical brake caliper described above, in this embodiment, applies preload pressure between the two caliper arms via a connecting assembly. This preload pressure is opposite in direction to the opening deformation force experienced by the caliper during braking, effectively offsetting part of the braking load, reducing the stress amplitude of the caliper, and delaying fatigue damage. A connecting beam is erected between the clamps of the mounting bracket, increasing overall rigidity and allowing the braking friction torque to be shared by the connecting beam and the mounting position, reducing the peak torque experienced by the mounting position. Through the coordinated operation of the connecting assembly and the connecting beam, a significant increase in the overall load-bearing capacity and a substantial extension of service life of the caliper are achieved without altering the existing mounting interface. Attached Figure Description

[0017] The above features of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0018] Figure 1 A schematic diagram of the caliper body in the prior art is shown; Figure 2 A schematic diagram of the mounting bracket for calipers in the prior art is shown; Figure 3 A schematic diagram of the structure of an electromechanical brake caliper according to an embodiment of this application is shown; Figure 4 A front view of an electromechanical brake caliper according to an embodiment of this application is shown; Figure 5 A cross-sectional view of an electromechanical brake caliper according to an embodiment of this application is shown; Figure 6 It shows Figure 5 A cross-sectional view along the AA direction; Figure 7 A schematic diagram of the mounting bracket according to an embodiment of this application is shown.

[0019] In the picture: 100, Electromechanical brake caliper; 101. Clamp body; 102. Mounting bracket; 103. Long guide post; 104. Short guide post; 105. Brake pad; 1011. Connecting assembly; 1012. Support pin; 1013. Mounting sleeve; 1014. Preload element; 1021. Extension; 1022. Connecting beam. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used herein is for describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0023] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0024] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] like Figure 3-7 As shown, in a first aspect, this application provides an electromechanical brake caliper 100, including a caliper body 101 and a mounting bracket 102. The caliper body 101 is slidably connected to the mounting bracket 102 via guide posts to form a floating caliper structure. The two caliper arms of the caliper body 101 are connected along their main force direction via a connecting assembly 1011 to apply a pre-tightening pressure to the caliper body 101 to resist brake opening deformation. A connecting beam 1022 is provided between the clamps of the mounting bracket 102. The connecting beam 1022 extends along the width direction of the mounting bracket 102 to improve the overall rigidity and share the braking friction torque.

[0026] This application provides an electromechanical brake caliper 100, particularly suitable for heavy-duty braking conditions of mining trucks with a capacity of 150 tons or more. The electromechanical brake caliper 100 includes a caliper body 101 and a mounting bracket 102. The caliper body 101 is slidably connected to the mounting bracket 102 via a long guide post 103 and a short guide post 104 to form a floating caliper structure. Since a motor drive mechanism needs to be arranged on one side of the floating caliper, its structural form determines that the caliper body 101 and the mounting bracket 102 are the main load-bearing components of the caliper, bearing the enormous reaction force and frictional torque generated during braking (the direction of the frictional force is as follows...). Figure 2 As indicated by the middle arrow F, the frictional torque is the product of the frictional force and the lever arm.

[0027] To address the technical problems of insufficient load-bearing capacity and easy fatigue fracture of the floating caliper mentioned above, this application has carried out synergistic optimization of the structure of the caliper body 101 and the mounting bracket 102.

[0028] like Figure 3-5 As shown, the two clamp arms of clamp 101 are connected along their main force direction (width direction) by a connecting assembly 1011. This connecting assembly 1011 can apply a pre-tightening pressure in its connecting direction. This pre-tightening pressure acts on the clamp 101, and its direction is opposite to the direction of the opening deformation force borne by the clamp 101 during braking. When braking occurs, the reaction force of the braking force acts on both sides of the clamp 101, causing the clamp 101 to tend to open. This opening force must first overcome the pre-tightening pressure applied by the connecting assembly 1011 before it can be transmitted to the base structure of the clamp 101. Through the above-mentioned pre-load offsetting mechanism, the peak load and stress alternation amplitude directly borne by the clamp 101 can be reduced, and the stress distribution uniformity on the clamp 101 bearing frame is improved, thereby delaying the accumulation of fatigue damage to the clamp 101 under high-frequency, high-load braking cycle conditions.

[0029] In addition, a connecting beam 1022 is provided between the clamps of the mounting bracket 102. This connecting beam 1022 extends along the width of the mounting bracket 102, spanning between the clamps on both sides of the mounting bracket 102. The addition of this connecting beam 1022 creates a frame structure in the width direction of the mounting bracket 102, significantly improving its overall rigidity and enhancing its ability to resist bending and torsional deformation when subjected to braking friction torque. Simultaneously, the connecting beam 1022 provides an additional load transfer path for the braking friction torque, allowing the torque to be shared by the connecting beam 1022 and the mounting position of the mounting bracket 102. This effectively reduces the peak torque experienced at the mounting position, lowers the stress level and deformation in that area, thereby improving the structural strength and fatigue resistance of the mounting bracket 102.

[0030] This application, through the coordinated design of the pre-tightening reinforcement of the caliper body 101 and the stiffness enhancement of the mounting bracket 102, achieves a significant increase in the overall load-bearing capacity of the caliper and an effective reduction in structural stress while maintaining the consistency of the overall mounting interface with the existing mining truck electromechanical brake caliper 100. This significantly extends the service life of the caliper under heavy load and high-frequency braking conditions, ensures the functional reliability of the braking system and driving safety, and also achieves a moderate weight reduction effect.

[0031] like Figure 3 As shown, in one specific embodiment, a pretensioner 1014 is also included, disposed between the two clamp arms 101, the pretensioner 1014 being used to apply an initial pretension force to the connecting assembly 1011 to establish a preload-relief mechanism on the clamp arms 101.

[0032] In this application, the electromechanical brake caliper 100 also includes a preload member 1014 disposed between the two caliper arms 101. This preload member 1014 applies a controllable initial preload force to the connecting assembly 1011, thereby establishing a preload-type load offsetting mechanism on the caliper arms 101. That is, the braking reaction force generated during braking must first overcome this initial preload force before it can be transmitted to the caliper body 101 base structure. In this way, the peak load and stress alternation amplitude directly borne by the caliper body 101 can be effectively reduced, and the stress distribution on the caliper body 101 tends to be more uniform, thereby further improving the fatigue resistance and service life of the caliper body 101 under high-frequency, high-load braking cycle conditions.

[0033] like Figure 3 As shown, in a specific embodiment, both the connecting assembly 1011 and the pretensioner 1014 are provided in two sets, with the two sets of pretensioners 1014 respectively arranged adjacent to a corresponding set of connecting assemblies 1011; there are two connecting beams 1022, which are respectively connected between two pairs of oppositely arranged clamps to connect the four clamps in pairs, and each connecting beam 1022 is located between a corresponding set of connecting assemblies 1011 and the pretensioner 1014.

[0034] In the scheme of this application, two sets of connecting components 1011 and pretensioners 1014 are provided, and the two sets of pretensioners 1014 are respectively arranged adjacent to the corresponding set of connecting components 1011. In this way, each set of connecting components 1011 and the corresponding set of pretensioners 1014 work together. That is, the connecting components 1011 apply the main pretension pressure to resist the braking opening deformation, while the pretensioners 1014 apply a controllable initial pretension force to the connecting components 1011. The two work together to construct a preload offsetting mechanism, which together reduces the stress amplitude of the clamp body 101 under high frequency and high load braking cycle conditions.

[0035] Accordingly, two connecting beams 1022 are also provided. Those skilled in the art will understand that the mounting bracket 102 has four clamps, arranged in pairs opposite each other. The two connecting beams 1022 are respectively connected between the two pairs of opposite clamps, thereby connecting the four clamps in pairs, so that the mounting bracket 102 as a whole forms a four-sided frame structure. Each connecting beam 1022 is positioned on the mounting bracket 102 between a corresponding set of connecting components 1011 and preload members 1014.

[0036] The solution of this application arranges each connecting beam 1022 between a corresponding set of connecting components 1011 and pretensioners 1014, so that the connecting beam 1022 is exactly located in the area defined by the connecting components 1011 and pretensioners 1014 in the width direction of the mounting bracket 102, thereby forming a structural layout on the mounting bracket 102 in which the connecting beam 1022, the connecting components 1011 and the pretensioners 1014 are arranged longitudinally and correspond to each other. This layout allows the connecting beam 1022, positioned between the connecting assembly 1011 and the pretensioner 1014, to optimize the force transmission path on the mounting bracket 102. Specifically, when braking friction torque acts on the mounting bracket 102, the connecting beam 1022 can directly receive and share the load transmitted from the brake pad 105 at its designated location, shortening the path of torque transmission from the brake pad 105 contact surface to the connecting beam 1022. This improves the efficiency of the connecting beam 1022 in sharing the braking friction torque, thereby enhancing the overall stiffness and structural strength of the mounting bracket 102. Simultaneously, this layout also allows the connecting beam 1022, connecting assembly 1011, and pretensioner 1014 to form a compact and hierarchical structural relationship within the limited space of the mounting bracket 102, avoiding assembly interference between components and improving space utilization.

[0037] like Figure 6 As shown, in one specific embodiment, the height of the connecting beam 1022 is higher than that of the connecting assembly 1011 and lower than that of the pretensioner 1014.

[0038] In the solution of this application, in the height direction of the mounting bracket 102, the height of the connecting beam 1022 is set to be higher than the support pin 1012 in the connecting assembly 1011, and lower than the height of the pretensioner 1014. This height arrangement creates a distinct spatial distribution of the connecting beam 1022, the connecting assembly 1011, and the pretensioner 1014 in the height direction, avoiding structural interference between the components and improving the space utilization of the mounting bracket 102.

[0039] like Figure 6 As shown, in a specific embodiment, the connecting beam 1022 is disposed on the mounting bracket 102 at the position corresponding to the contact surface of the brake pad 105.

[0040] In this application, both connecting beams 1022 are positioned on the mounting bracket 102 at locations corresponding to the contact surfaces of the brake pads 105. This positioning ensures that the connecting beams 1022 directly correspond to the plane of the brake pads 105 on the mounting bracket 102. When braking friction is transmitted from the brake pads 105 to the mounting bracket 102, the connecting beams 1022 can directly receive and share part of the friction torque at this position, thereby shortening the torque transmission path and improving the efficiency of the connecting beams 1022 in sharing the braking friction torque.

[0041] like Figure 7 As shown, in a specific embodiment, the clip has a vertically arranged extension 1021 above it, and the connecting beam 1022 is disposed at the extended end of the extension 1021.

[0042] In this application, a vertically extending extension 1021 is provided above the clamping plate of the mounting bracket 102. The connecting beam 1022 is not directly mounted on the main body of the clamping plate, but is located at the extended end of the extension 1021, forming two C-shaped groove structures on the side of the clamping plate. The accommodating space formed by the C-shaped groove structure on the mounting bracket 102 is used to accommodate part of the clamping body 101, making the assembly relationship between the clamping body 101 and the mounting bracket 102 more compact, improving space utilization, and facilitating layout optimization within the limited space of the vehicle.

[0043] like Figure 3 As shown, in one specific embodiment, the clamp body 101 has a protrusion on its arm, and the protrusion has an assembly hole for mounting the connecting assembly 1011 and an installation hole for mounting the preload 1014; along the length direction of the clamp body 101, the assembly hole is located outside the installation hole.

[0044] In this application, the clamp body 101 has a protrusion on its arm, which protrudes outward from the surface of the arm to provide a support structure for mounting related components. The protrusion has two types of holes: a mounting hole for mounting the connecting assembly 1011 and a mounting hole for mounting the preload member 1014. Along the length of the clamp body 101, the mounting hole is located outside the mounting hole, meaning the connecting assembly 1011 is closer to the outer edge of the clamp body 101 than the preload member 1014.

[0045] Through the aforementioned hole arrangement, the connecting component 1011 and the pre-tightening component 1014 are staggered along the length of the clamp body 101 arm, effectively preventing structural interference during assembly and use. Simultaneously, because they spatially avoid each other, the connecting component 1011 and the pre-tightening component 1014 can function independently. That is, the connecting component 1011 applies the main pre-tightening force, while the pre-tightening component 1014 applies a controllable initial pre-tightening force, without interfering with each other. This facilitates precise transmission and independent adjustment of the pre-tightening force. Furthermore, this staggered arrangement optimizes the hole distribution on the protrusion, facilitating assembly operations and improving the overall structural rationality and assembly convenience of the clamp body 101.

[0046] like Figure 6 As shown, in a specific embodiment, the connecting assembly 1011 includes a support pin 1012 and a mounting sleeve 1013 sleeved on the outer periphery of the support pin 1012; one end of the support pin 1012 is provided with a threaded portion, and the other end is provided with a limiting portion. The support pin 1012 passes through a mounting hole on one arm of the clamp body 101 and is threadedly connected to a mounting hole on another arm of the clamp body 101, and the limiting portion is locked at the mounting hole through which the support pin 1012 passes; both ends of the mounting sleeve 1013 abut against the inner sidewalls of the two mounting holes respectively.

[0047] In this application, the connecting assembly 1011 includes a support pin 1012 and a mounting sleeve 1013, wherein the mounting sleeve 1013 is fitted onto the outer periphery of the support pin 1012. One end of the support pin 1012 is provided with a threaded portion, and the other end is provided with a limiting portion. During assembly, the support pin 1012 passes through the mounting hole on one of the clamp arms 101 with its threaded portion, and continues to be screwed into the mounting hole on the other clamp arm 101 and threadedly connected to that mounting hole. At the same time, the limiting portion of the support pin 1012 is locked at the first mounting hole into which it passes, thereby axially positioning and locking the support pin 1012 between the two clamp arms 101. The mounting sleeve 1013 is fitted onto the outer periphery of the support pin 1012, and its two ends abut against the inner sidewalls of the two mounting holes, respectively.

[0048] Through the above structure, the support pin 1012 undertakes the main functions of shear resistance and axial positioning, while the mounting sleeve 1013 abuts against the inner walls of the two assembly holes at both ends, so as to evenly distribute the contact stress between the support pin 1012 and the assembly holes, avoid stress concentration in a local area of ​​the support pin 1012, and improve the assembly rigidity and structural stability between the connecting component 1011 and the clamp body 101 arm, thereby enhancing the fatigue resistance of the connecting component 1011 under alternating loads.

[0049] In one specific implementation, the preload 1014 has the same structure as the support pin 1012, and the mounting hole that mates with the threaded portion of the preload 1014 is a blind hole.

[0050] In this application, the preload 1014 and the support pin 1012 adopt the same structural design, that is, one end of the preload 1014 is provided with a threaded portion, and the other end is provided with a limiting portion. During assembly, the preload 1014 passes through the mounting hole on one of the clamp arms 101 with its threaded portion, and is screwed into the mounting hole on the other clamp arm 101 and threadedly connected to the mounting hole; at the same time, the limiting portion of the preload 1014 is locked at the first mounting hole into which it passes, thereby axially positioning and locking the preload 1014 between the two clamp arms 101.

[0051] It is worth noting that the mounting hole that mates with the threaded portion of the preload 1014 in this design is a blind hole, meaning that the bottom of the mounting hole is closed and not through. Thus, when the preload 1014 is screwed in until the end of its threaded portion abuts against the bottom of the blind hole, the preset assembly position is achieved. The bottom wall of the blind hole provides a precise axial positioning reference for the preload 1014, effectively preventing excessive screwing of the preload 1014 that could lead to excessive preload or structural damage, ensuring the accuracy and controllability of the initial preload applied by the preload 1014.

[0052] Furthermore, a gasket is provided between the limiting part and the side wall of the assembly hole or mounting hole. The gasket is placed between the limiting part and the side wall of the assembly hole or mounting hole to form a flexible isolation between the limiting part of the support pin 1012 or preload 1014 and the side wall of the assembly hole of the clamp body 101 arm, so as to avoid the limiting part directly contacting the side wall of the assembly hole rigidly and causing wear or crushing.

[0053] By incorporating this shim, the axial load borne by the limiting part is evenly transferred to the sidewall of the mounting hole, effectively reducing contact stress and mitigating wear between the limiting part and the sidewall of the mounting hole. This improves the stability and reliability of the assembly connection between the connecting assembly 1011 or the preload 1014 and the clamp arm 101. Furthermore, the shim allows for fine-tuning of the axial position of the limiting part by selecting shims of different thicknesses to compensate for manufacturing errors and assembly deviations, further ensuring the accuracy of the preload application.

[0054] In some embodiments, this application provides an electromechanical brake for mining trucks, including the electromechanical brake caliper 100 as described above.

[0055] In this application, an electromechanical brake for mining trucks is also provided. The electromechanical brake includes the electromechanical brake caliper 100 as described above.

[0056] The electromechanical brake of this application employs the aforementioned electromechanical brake caliper 100. During braking, the caliper body 101 resists brake opening deformation through the preload applied by the connecting assembly 1011. The mounting bracket 102 enhances overall rigidity and shares the braking friction torque through the connecting beam 1022. Therefore, this electromechanical brake exhibits higher structural strength and a longer service life under heavy-load, high-frequency braking conditions, ensuring the reliability of the mining truck braking system and driving safety.

[0057] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An electromechanical brake caliper, comprising a caliper body and a mounting bracket, wherein the caliper body is slidably connected to the mounting bracket via guide posts to form a floating caliper structure, characterized in that, The two clamp arms of the clamp body are connected by a connecting assembly along their main force direction to apply a pre-tightening pressure to the clamp body to resist braking opening deformation. A connecting beam is provided between the clamps of the mounting bracket. The connecting beam extends along the width direction of the mounting bracket to improve the overall rigidity and share the braking friction torque.

2. The electromechanical brake caliper according to claim 1, characterized in that, It also includes a preload element disposed between the two clamp arms, the preload element being used to apply an initial preload force to the connecting assembly to establish a preload-type load offset mechanism on the clamps.

3. The electromechanical braking caliper according to claim 2, characterized in that, Both the connecting component and the pretensioner are provided in two sets, and the two sets of pretensioners are respectively arranged adjacent to the corresponding set of the connecting component. Two connecting beams are provided, each connecting between two pairs of oppositely arranged clamping pieces to connect the four clamping pieces in pairs, and each connecting beam is located between a corresponding set of connecting components and the pretensioner.

4. The electromechanical brake caliper according to claim 3, characterized in that, The height of the connecting beam is higher than the connecting assembly but lower than the height of the pretensioner.

5. The electromechanical brake caliper according to claim 3, characterized in that, The connecting beam is positioned on the mounting bracket at the location corresponding to the contact surface of the brake pad.

6. The electromechanical brake caliper according to claim 5, characterized in that, The clip has a vertically arranged extension above it, and the connecting beam is located at the extended end of the extension.

7. The electromechanical brake caliper according to any one of claims 2-6, characterized in that, The clamp body has a protrusion on its clamp arm, and the protrusion has an assembly hole for installing the connecting component and an installation hole for installing the pre-tightening component. Along the length of the clamp body, the assembly hole is located outside the mounting hole.

8. The electromechanical brake caliper according to claim 7, characterized in that, The connecting component includes a support pin and a mounting sleeve fitted around the outer periphery of the support pin; One end of the support pin is provided with a threaded portion, and the other end is provided with a limiting portion. After the support pin passes through the mounting hole on one of the clamp arms, it is threadedly connected to the mounting hole on the other clamp arm, and the limiting portion is locked at the mounting hole through which the support pin passes; the two ends of the mounting sleeve abut against the inner sidewalls of the two mounting holes respectively.

9. The electromechanical brake caliper according to claim 8, characterized in that, The preload has the same structure as the support pin, and the mounting hole that mates with the threaded portion of the preload is a blind hole.

10. An electromechanical brake for a mining truck, characterized in that, Including the electromechanical brake caliper as described in any one of claims 1 to 9.

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