Drag torque detection device for EMB and working method thereof

Abstract

The present invention belongs to the technical field of torque detection, and specifically relates to a drag torque detection device for EMB and a working method thereof. The drag torque detection device for EMB comprises: a rotating shaft, one end of which is provided with a mounting plate, and the other end is connected to a motor through a torque sensor; a brake disc, which is connected to a threaded hole of the mounting disc through bolts, and triggers a glue chamber to release thread glue into the threaded hole during the assembly of the bolts; a control module, which is electrically connected to the motor and the torque sensor, and is configured to drive the brake disc to rotate by controlling the motor, and detect whether the brake disc is tilted according to data obtained by the torque sensor. The drag torque detection device for EMB improves the tightness of the bolt and the threaded hole by causing the bolt to trigger the glue chamber to release thread glue into the threaded hole during the assembly of the brake disc, that is, better simulates the real application scenario of the brake disc.

Description

Technical Field

[0001] The present invention belongs to the technical field of torque detection, and specifically relates to vehicle testing, and in particular to a drag torque detection device for EMB and a working method thereof. Background Art

[0002] Brake discs and brake pads are core components in the braking process and require drag torque testing before leaving the factory.

[0003] In the actual installation scenario of the brake disc, the brake disc is not only fixed by bolts, but also coated with thread glue on the threads of the bolts; in the related technology, the existing drag torque detection device only fixes the brake disc by bolts, and does not apply thread glue, which causes the bolts used to fix the brake disc to easily loosen during the detection process, thereby affecting the detection accuracy.

[0004] Therefore, how to solve the technical problem that the brake disc cannot simulate the actual thread tightening scenario due to the lack of thread glue during installation is an urgent problem that technical personnel in this field need to solve.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The embodiments of the present disclosure at least provide a drag torque detection device for EMB and a working method thereof.

[0007] In the first aspect, an embodiment of the present disclosure provides a drag torque detection device for EMB, including: a rotating shaft, one end of which is provided with a mounting plate, and the other end is connected to a motor through a torque sensor; a brake disc, which is connected to a threaded hole of the mounting plate through bolts, and during the assembly of the bolts, a glue chamber is triggered to release thread glue into the threaded hole; a control module, which is electrically connected to the motor and the torque sensor, and is configured to drive the brake disc to rotate by controlling the motor, and detect whether the brake disc is tilted according to data obtained by the torque sensor.

[0008] In an optional embodiment, the glue chamber is opened on the periphery of the threaded hole, and the inner wall of the threaded hole is axially symmetrically provided with two slides connected to the glue chamber; a guide mechanism for blocking the glue chamber is arranged in the slide; a linkage piece is arranged in the threaded hole, and a pair of first guide pieces are arranged on the side wall of the linkage piece, and the two first guide pieces are respectively arranged in the corresponding slides; during the assembly of the bolt, the linkage piece is forced to retreat along the slide, and in the process of retreating, it resists with the guide mechanism, so that the front end of the guide mechanism opens the glue chamber, and at the same time, the rear end of the guide mechanism extends out of the slide; when the bolt assembly is completed, the guide mechanism and the corresponding first guide piece are reset after being misaligned, that is, the front end of the guide mechanism closes the glue chamber, and the rear end retracts into the slide; during the disassembly of the bolt, the linkage piece is rotated and reset along the thread direction of the threaded hole to clean the thread glue in the threaded hole.

[0009] In an optional embodiment, the guide mechanism includes: a guide column, which is arranged in the glue chamber; a slider, which is located in the slide and is sleeved on the guide column; a push block, which is inserted at the front end of the slider and is sleeved on the guide column; wherein, during the assembly of the bolts, the linkage plate is forced to retreat, and the first guide plate thereon resists the push block to drive the slider to retreat synchronously, that is, the front end of the slider opens the glue chamber, and the rear end extends out of the slide.

[0010] In an optional embodiment, the guide mechanism also includes: a guide piece arranged parallel to the guide column; a waist-shaped hole is opened in the middle of the push block, and the rear end of the guide piece is bent backward; during the bolt assembly process, the rear end of the push block is against the guide piece; when the bolt assembly is completed, the push block moves to the bending part of the guide piece, that is, the push block gradually retreats until it is misaligned with the first guide piece.

[0011] In an optional embodiment, a first return spring is sleeved on the guide column; when the bolt is assembled, the first return spring pushes the slider to return to its original position.

[0012] In an optional embodiment, a plug is provided at the bottom of the threaded hole, and a second reset spring is provided between the plug and the linkage plate; during the removal of the bolt, the second reset spring pushes the linkage plate to rotate and reset along the threaded direction of the threaded hole.

[0013] In an optional embodiment, a pair of second guide plates are symmetrically arranged on the side wall of the linkage plate, and the second guide plates are connected to the linkage plate by a torsion spring; during the assembly of the bolts, the second guide plates are forced to rotate so that the linkage plate is forced to retreat along the slide; and during the disassembly of the bolts, the second guide plates and the first guide plates jointly guide the linkage plate to rotate along the threaded direction of the threaded hole.

[0014] In an optional embodiment, the two first guide plates and the two second guide plates are evenly distributed along the circumference of the linkage plate.

[0015] In an optional embodiment, the two first guide plates and the two second guide plates are arranged along the thread direction of the threaded hole.

[0016] On the second aspect, the embodiment of the present disclosure also provides a working method of the drag torque detection device for EMB as described above, which includes: a mounting plate is provided at one end of the rotating shaft, and the other end is connected to the motor through a torque sensor; the brake disc is connected to the threaded hole of the mounting plate through bolts, and during the bolt assembly process, the glue chamber is triggered to release thread glue into the threaded hole; the motor is controlled by the control module to drive the brake disc to rotate, and whether the brake disc is tilted is detected according to the data obtained by the torque sensor.

[0017] The beneficial effect of the present invention is that the drag torque detection device for EMB and the working method thereof can improve the tightness of the bolt and the threaded hole by causing the bolt to trigger the glue chamber to release the thread glue into the threaded hole during the process of assembling the brake disc, that is, better simulate the real application scenario of the brake disc, and during the process of disassembling the brake disc, the thread glue in the threaded hole can also be cleaned to facilitate the next assembly.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a drag torque detection device for EMB provided in an embodiment of the present disclosure;

[0022] Figure 2 A schematic diagram of the structure of a mounting plate provided in an embodiment of the present disclosure;

[0023] Figure 3A schematic diagram of a cross-sectional structure of a threaded hole without a bolt installed provided in an embodiment of the present disclosure;

[0024] Figure 4 A schematic diagram of a cross-sectional structure of a threaded hole during a bolt assembly process provided by an embodiment of the present disclosure;

[0025] Figure 5 A schematic diagram of a cross-sectional structure of a threaded hole when a bolt is assembled according to an embodiment of the present disclosure;

[0026] Figure 6 A structural schematic diagram of a guide mechanism provided in an embodiment of the present disclosure;

[0027] Figure 7 A schematic diagram of a cross-sectional structure of a threaded hole during a bolt removal process provided by an embodiment of the present disclosure;

[0028] Figure 8 A schematic diagram of the structure of a linkage sheet provided in an embodiment of the present disclosure.

[0029] In the figure:

[0030] Base 1;

[0031] The first support base 2, the rotating shaft 21, the brake disc 22, the torque sensor 23, and the motor 24;

[0032] A second support seat 3, a driver 31, and a brake pad 32;

[0033] Installation disk 4;

[0034] Threaded hole 41, slideway 411;

[0035] Glue chamber 42;

[0036] Guide mechanism 43, guide column 431, slider 432, push block 433, waist-shaped hole 4331, guide sheet 434, first return spring 435;

[0037] Linkage piece 44, first guide piece 441, second return spring 442, second guide piece 443;

[0038] Plug 45. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] EMB is: electronic mechanical brake system.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] like Figure 1 , Figure 2 As shown, at least one embodiment provides a drag torque detection device for EMB, which includes: a rotating shaft 21, one end of which is provided with a mounting plate 4, and the other end is connected to a motor 24 through a torque sensor 23; a brake disc 22, which is connected to a threaded hole 41 of the mounting disc 4 through bolts, and during the assembly of the bolts, the glue chamber 42 is triggered to release thread glue into the threaded hole 41; a control module, which is electrically connected to the motor 24 and the torque sensor 23, and is configured to drive the brake disc 22 to rotate by controlling the motor 24, and detect whether the brake disc 22 is tilted according to the data obtained by the torque sensor 23.

[0044] Specifically, the drag torque detection device for EMB also includes: a base 1, on which a first support seat 2 and a second support seat 3 are arranged, a rotating shaft 21 is rotatably arranged on the first support seat 2, a driver 31 is arranged on the second support seat 3, and a brake pad 32 is arranged on the driving end of the driver 31; during the detection process, the brake disc 22 is first assembled on the mounting disc 4, and then the brake pad 32 is installed on the driver 31, and then the control module controls the brake pad 32 to clamp the brake disc 22 through the driver 31, and after multiple clamping actions are performed, the posture data of the brake pad 32 at this time is obtained through the visual sensor to detect whether the brake pad 32 is reset, wherein reset means qualified, and no reset means unqualified; when the brake pad 32 is detected, the control module drives the rotating shaft 21 to rotate through the motor 24, and the rotation of the rotating shaft 21 drives the brake disc 22 to rotate, and at this time the torque sensor 23 obtains data, and the data is used to detect whether the performance of the brake disc 22 is reduced due to multiple clamping of the brake pad 32.

[0045] like Figure 3 As shown, in order to enable the assembly of the bolt to trigger the glue chamber 42 to release the threaded glue, the glue chamber 42 is opened on the periphery of the threaded hole 41. At the same time, two slideways 411 connected to the glue chamber 42 are axially symmetrically opened on the inner wall of the threaded hole 41, and a guide mechanism 43 for blocking the glue chamber 42 is arranged in the slideway 411. A linkage piece 44 is arranged in the threaded hole 41, and a pair of first guide pieces 441 are arranged on the side wall of the linkage piece 44. The two first guide pieces 441 are respectively arranged in the corresponding slideways 411.

[0046] Specifically, Figure 4 As shown, during the bolt assembly process, the bolt presses against the linkage piece 44 and pushes the linkage piece 44 back along the slide 411. During the back movement of the linkage piece 44, the linkage piece 44 will press against the guide mechanism 43, and after the press, the guide mechanism 43 will be driven to move back synchronously, so that the guide mechanism 43 gradually opens the glue chamber 42, and the threaded glue in the glue chamber 42 flows into the threaded hole 41. At the same time, during the back movement of the guide mechanism 43, its rear end will extend out of the slide 411. This solution better simulates the actual installation scenario of the brake disc 22 by making the linkage piece 44 move back following the insertion end of the bolt, and opening the glue chamber 42 during the movement, so that the threaded glue in the glue chamber 42 fills the gap.

[0047] Specifically, Figure 5 As shown, when the bolt is assembled, the guide mechanism 43 retreats to the threshold value. At this time, the guide mechanism 43 and the first guide plate 441 are misaligned. Then, the guide mechanism 43 is reset due to the release of force due to the misalignment. The reset guide mechanism 43 will close the glue chamber 42, and the rear end of the guide mechanism 43 will also retract into the slide 411. The guide mechanism 43 of this scheme can intuitively indicate whether the bolt is installed in place, that is, if it is not installed in place, the guide mechanism 43 will not retract into the slide 411.

[0048] Specifically, Figure 6 As shown, during the bolt removal process, since the guide mechanism 43 has been reset, the linkage piece 44 is now engaged with the threaded hole 41. As the bolt is withdrawn, the linkage piece 44 is forced to rotate and reset, and the thread glue in the threaded hole 41 is cleaned during the reset process.

[0049] like Figure 4 As shown, in some embodiments, the guide mechanism 43 includes: a guide column 431, which is arranged in the glue chamber 42; a slider 432, which is located in the slide 411 and is sleeved on the guide column 431; a push block 433, which is inserted at the front end of the slider 432 and is sleeved on the guide column 431; wherein, during the bolt assembly process, the linkage piece 44 is forced to retreat, and the first guide piece 441 thereon resists the push block 433 to drive the slider 432 to retreat synchronously, that is, the front end of the slider 432 opens the glue chamber 42, and the rear end extends out of the slide 411.

[0050] Specifically, the slider 432 is slidably disposed in the slideway 411, and its function is to block the glue chamber 42 when no force is applied, and gradually open the glue chamber 42 when force is applied, and at the same time indicate whether the bolt is assembled in place during the bolt assembly process.

[0051] like Figure 4 , Figure 5 , Figure 6As shown, in some embodiments, the guide mechanism 43 also includes: a guide piece 434 arranged parallel to the guide column 431; a waist-shaped hole 4331 is opened in the middle of the push block 433, and the rear end of the guide piece 434 is bent backward; during the bolt assembly process, the rear end of the push block 433 is against the guide piece 434; when the bolt assembly is completed, the push block 433 moves to the bending part of the guide piece 434, that is, the push block 433 gradually retreats until it is misaligned with the first guide piece 441.

[0052] In some embodiments, a first return spring 435 is sleeved on the guide column 431 ; when the bolt is assembled, the first return spring 435 pushes the slider 432 to return to its original position.

[0053] Specifically, during the bolt assembly process, the rear end of the push block 433 is abutted by the guide piece 434, so that the front end of the push block 433 abuts against the first guide piece 441 of the linkage piece 44, so that the push block 433 and the linkage piece 44 retreat synchronously; when the push block 433 retreats to the threshold, the guide piece 434 here is bent backwards. At this time, the push block 433 is misaligned with the first guide piece 441 due to the existence of the waist-shaped hole 4331, causing the slider 432 to release the force and reset.

[0054] like Figure 7 As shown, in some embodiments, a plug 45 is provided at the bottom of the threaded hole 41, and a second return spring 442 is provided between the plug 45 and the linkage plate 44; during the bolt removal process, the second return spring 442 pushes the linkage plate 44 to rotate and return to its original position along the threaded direction of the threaded hole 41.

[0055] like Figure 7 , Figure 8 As shown, in some embodiments, a pair of second guide pieces 443 are symmetrically arranged on the side wall of the linkage piece 44, and the second guide pieces 443 are connected to the linkage piece 44 through a torsion spring; during the assembly of the bolts, the second guide pieces 443 are forced to rotate so that the linkage piece 44 is forced to retreat along the slideway 411; and during the disassembly of the bolts, the second guide pieces 443 and the first guide pieces 441 jointly guide the linkage piece 44 to rotate along the threaded direction of the threaded hole 41.

[0056] In some embodiments, the two first guide plates 441 and the two second guide plates 443 are evenly distributed along the circumference of the linkage plate 44 .

[0057] In some embodiments, the two first guide plates 441 and the two second guide plates 443 are arranged along the thread direction of the threaded hole 41 .

[0058] Specifically, direction F is the direction in which the linkage piece 44 is forced to retreat. When the linkage piece 44 is forced to retreat, the second guide piece 443 is folded against the thread of the threaded hole 41, but during the resetting process of the linkage piece 44, the second guide piece 443 will not be folded and is located in the thread of the threaded hole 41; at the same time, during the rotation and resetting process of the linkage piece 44, the thread glue in the thread groove is cleaned by the first guide piece 441 and the second guide piece 443 until it passes over the push block 433.

[0059] At least one embodiment provides a working method of a drag torque detection device for EMB, which includes: a mounting plate 4 is provided at one end of a rotating shaft 21, and the other end is connected to a motor 24 via a torque sensor 23; a brake disc 22 is connected to a threaded hole 41 of the mounting disc 4 via bolts, and during the assembly of the bolts, a glue chamber 42 is triggered to release thread glue into the threaded hole 41; the motor 24 is controlled by a control module to drive the brake disc 22 to rotate, and whether the brake disc 22 is tilted is detected based on data obtained by the torque sensor 23.

[0060] In summary, the drag torque detection device and working method for EMB improves the tightness between the bolt and the threaded hole 41 by causing the bolt to trigger the glue chamber 42 to release the thread glue into the threaded hole 41 during the assembly of the brake disc 22, that is, better simulates the actual application scenario of the brake disc, and during the disassembly of the brake disc, the thread glue in the threaded hole can also be cleaned to facilitate the next assembly.

[0061] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0062] In this article, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to another element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0063] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0064] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "include", "comprise" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0065] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0066] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention 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 of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0068] Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0069] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0070] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A drag torque detection device for EMB, characterized in that: include: A rotating shaft, one end of which is provided with a mounting plate, and the other end of which is connected to the motor via a torque sensor; The brake disc is connected to the threaded hole of the mounting disc by bolts, and the glue chamber is triggered to release thread glue into the threaded hole during the bolt assembly process; A control module is electrically connected to the motor and the torque sensor, and is configured to drive the brake disc to rotate by controlling the motor, and detect whether the brake disc is tilted according to data obtained by the torque sensor; The glue chamber is arranged at the periphery of the threaded hole, and the inner wall of the threaded hole is symmetrically provided with two slideways connected with the glue chamber along the axial direction; A guide mechanism for blocking the glue chamber is provided in the slideway; A linkage piece is arranged in the threaded hole, a pair of first guide pieces are arranged on the side wall of the linkage piece, and the two first guide pieces are arranged in corresponding slideways respectively; During the bolt assembly process, the linkage piece is forced to retreat along the slideway, and in the process of retreating, it abuts against the guide mechanism, so that the front end of the guide mechanism opens the glue chamber, and at the same time, the rear end of the guide mechanism extends out of the slideway; When the bolts are assembled, the guide mechanism and the corresponding first guide piece are reset after being misaligned, that is, the front end of the guide mechanism closes the glue chamber, and the rear end retracts into the slideway; During the process of disassembling the bolt, the linkage piece is rotated and reset along the thread direction of the threaded hole to clean the thread glue in the threaded hole; The guiding mechanism comprises: A guide post, disposed in the glue chamber; A slider is located in the slideway and sleeved on the guide column; A push block is inserted at the front end of the slide block and sleeved on the guide column; In the process of bolt assembly, the linkage piece is forced to move backward, and the first guide piece thereon abuts against the push block to drive the slider to move backward synchronously, that is, The front end of the slider opens the glue chamber, and the rear end extends out of the slideway; The guide mechanism further comprises: a guide sheet arranged parallel to the guide post; A waist-shaped hole is provided in the middle of the push block, and the rear end of the guide piece is bent backwards; During the bolt assembly process, the rear end of the push block abuts against the guide piece; When the bolt is assembled, the push block moves to the bend of the guide piece, that is, The push block gradually retreats until it is misaligned with the first guide piece.

2. The drag torque detection device for EMB according to claim 1, characterized in that: A first return spring is sleeved on the guide column; When the bolt is assembled, the first return spring pushes the slider to return to its original position.

3. The drag torque detection device for EMB according to claim 2, characterized in that: A plug is provided at the bottom of the threaded hole, and a second return spring is provided between the plug and the linkage piece; During the process of disassembling the bolt, the second reset spring pushes the linkage plate to rotate and reset along the thread direction of the threaded hole.

4. The drag torque detection device for EMB according to claim 3, characterized in that: A pair of second guide plates are symmetrically arranged on the side wall of the linkage plate, and the second guide plates are connected to the linkage plate via a torsion spring; During the bolt assembly process, the second guide piece is forced to rotate so that the linkage piece is forced to retreat along the slideway; and During the process of disassembling the bolt, the second guide piece and the first guide piece jointly guide the linkage piece to rotate along the thread direction of the threaded hole.

5. The drag torque detection device for EMB according to claim 4, characterized in that: The two first guide plates and the two second guide plates are evenly distributed along the circumference of the linkage plate.

6. The drag torque detection device for EMB according to claim 5, characterized in that: The two first guide plates and the two second guide plates are arranged along the thread direction of the threaded hole.

7. A working method of the drag torque detection device for EMB according to any one of claims 1 to 6, characterized in that: include: One end of the rotating shaft is provided with a mounting plate, and the other end is connected to the motor via a torque sensor; The brake disc is connected to the threaded hole of the mounting disc through bolts, and during the bolt assembly process, the glue chamber is triggered to release the thread glue into the threaded hole; The control module controls the motor to drive the brake disc to rotate, and detects whether the brake disc is tilted based on the data obtained by the torque sensor.

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