Fan clutch assembly capable of automatically detecting rotating speed

Abstract

The utility model relates to the technical field of clutches, in particular to a fan clutch assembly capable of automatically detecting rotating speed, which comprises a fan clutch, a rotating speed sensor component and an induction code disc, the rotating speed sensor component and the induction code disc are fixed on the fan clutch, and the rotating speed sensor component is fixed on a non-rotating part of the fan clutch. The induction code disc is fixed to a follow-up rotating piece of the fan clutch, the rotating speed sensor assembly and the induction code disc are oppositely arranged in the radial direction or the axial direction of the fan clutch, and a gap exists between the rotating speed sensor assembly and the induction code disc, so that the problem that the electromagnetic fan clutch cannot monitor the real-time rotating speed of a load is solved; and whether the fan clutch fails in the operation process or not can be accurately judged. The load rotating speed of the fan clutch is monitored in real time, closed-loop control is achieved in cooperation with the control module, the suction time of the fan clutch is controlled, abnormal abrasion of the clutch is improved, fan noise is lowered, and comfort of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clutches, in particular to a fan clutch assembly capable of self-detecting rotational speed. Background Art

[0002] The information disclosed in this background technology section is only intended to increase understanding of the overall background of the present invention, and is not necessarily regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] The engine cooling system uses a cooling fan to cool the water temperature of the engine's thermal circulation system. A fan clutch is installed between the cooling fan and the engine, and different intensities of cooling can be achieved by adjusting the working state of the cooling fan.

[0004] The prior art discloses a three-speed drive clutch (publication number: CN 11648839 U). The three-speed drive clutch does not have a self-detection function for load speed. The conventional clutch cannot meet the engine's requirements for reducing instantaneous fan noise, improving driver and passenger comfort, and dynamically intelligently self-detecting whether the fan clutch is faulty. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the present utility model is to provide a fan clutch assembly that can self-detect the rotational speed, so as to solve the problems of high instantaneous noise of the fan clutch fan and the inability of the fan clutch to dynamically and intelligently self-detect whether it is faulty.

[0006] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0007] In the first aspect, the utility model provides a fan clutch assembly that can self-detect the speed, including: a fan clutch, a speed sensor assembly and an inductive code disk, the fan clutch including a core shaft, the core shaft having a front end and a rear end, and the core shaft is provided with a connecting disk, an electromagnetic attraction mechanism, a driving disk and an iron core component in sequence along the direction from the front end to the rear end; the core shaft is a fixed axis, and the speed sensor assembly is fixed to the front end of the core shaft; the inductive code disk is fixed on the connecting disk, away from the electromagnetic attraction mechanism, and the speed sensor assembly and the inductive code disk are arranged opposite to each other in the radial or axial direction of the fan clutch and there is a gap.

[0008] In the second aspect, the utility model also provides a fan clutch assembly that can self-detect the speed, including: a fan clutch, a speed sensor assembly and an inductive code disk, the fan clutch including a core shaft, the core shaft having a front end and a rear end, and the core shaft is provided with a connecting disk, an electromagnetic attraction mechanism, a drive disk and an iron core component in sequence along the direction from the front end to the rear end; the core shaft is a fixed axis, the speed sensor assembly is fixed on the core shaft, and is located between the connecting disk and the electromagnetic attraction mechanism; the inductive code disk is fixed on the connecting disk, close to the side of the electromagnetic attraction mechanism, and the speed sensor assembly and the inductive code disk are arranged relative to each other in the radial or axial direction of the fan clutch and there is a gap.

[0009] Preferably, the speed sensor assembly is fixed on the core shaft, and includes a sleeve, a bracket plate and a Hall sensor, the Hall sensor is fixed on the bracket plate, the bracket plate is fixed on the sleeve, and the sleeve is fixed on the core shaft.

[0010] Preferably, the bracket plate is made of non-magnetic material.

[0011] Preferably, the induction code disc is made of magnetic conductive material, and a tooth plate is provided at a position where the induction code disc is opposite to the Hall sensor.

[0012] Preferably, the number of tooth plates of the induction code disk is 4 to 16, and the tooth plates are evenly distributed on the base disk.

[0013] On the third aspect, the utility model also provides a fan clutch assembly that can self-detect the rotational speed, including: a fan clutch, a rotational speed sensor assembly and an inductive code disk, the fan clutch including a core shaft, the core shaft having a front end and a rear end, and the core shaft is sequentially provided with a drive disk, an electromagnetic attraction mechanism, a connecting disk and an iron core component along the direction from the front end to the rear end; the core shaft is a fixed shaft, the rotational speed sensor assembly is fixed to the rear end of the iron core component and is located at the rear end of the core shaft; the inductive code disk is fixed to the rear end of the connecting disk, and the rotational speed sensor assembly and the inductive code disk are arranged relative to each other in the radial or axial direction of the fan clutch and there is a gap.

[0014] Fourthly, the utility model also provides a fan clutch assembly that can self-detect the rotational speed, including: a fan clutch, a rotational speed sensor assembly and an inductive code disk, the fan clutch including a core shaft, the core shaft having a front end and a rear end, the core shaft being provided with a connecting disk, an electromagnetic attraction mechanism, a driving disk and an iron core component in sequence along the direction from the front end to the rear end; the core shaft is a rotating shaft, the rotational speed sensor assembly is fixed to the rear end of the iron core component and is located at the rear end of the core shaft; the inductive code disk is fixed to the rear end of the connecting disk, and is arranged opposite to the rotational speed sensor assembly in the radial or axial direction of the fan clutch with a gap therebetween.

[0015] Preferably, the speed sensor assembly is fixed on the core component, including a bracket plate and a Hall sensor, the Hall sensor is fixed on the bracket plate, the bracket plate is fixed on the core component, and the core component is pivotally or fixedly connected to the core shaft.

[0016] Preferably, the rotation speed sensor assembly includes an L-shaped bracket plate and a Hall sensor, and the Hall sensor is fixed on the bracket plate.

[0017] Preferably, the induction code disc is made of magnetic conductive material, and a tooth plate is provided at a position where the induction code disc is opposite to the Hall sensor.

[0018] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0019] 1. The utility model realizes real-time monitoring of the load speed of the fan clutch by adding a self-detection speed component to the existing fan clutch, solves the problem that the fan clutch cannot dynamically self-detect and determine whether it has failed, effectively reduces the misjudgment claims of the fan clutch, and improves the economy of the clutch product.

[0020] 2. In the first solution proposed by the present invention, the speed sensor assembly needs to transmit electrical signals, and is arranged on a non-rotating part, which has a simple structure and lower cost. The speed sensor assembly is arranged at the front end of the core shaft, has a simple structure, is easy to install and fix, and can effectively reduce costs. The Hall sensor wiring harness can be arranged in the core shaft slot, and the internal routing can prevent the wiring harness from being worn or dragged and damaged.

[0021] 3. In the second solution proposed by the present invention, the speed sensor assembly needs to transmit electrical signals. It is arranged on a non-rotating part with a simple structure and lower cost. The speed sensor assembly is arranged between the connecting disk and the electromagnetic attraction mechanism. The speed sensor assembly and the induction code disk are located inside the connecting disk, which can effectively prevent damage caused by sand and gravel foreign objects caused by high-speed rotation of the fan blades; the heat dissipation of the heat dissipation teeth inside the connecting disk can effectively prevent dust from adhering to the Hall sensor; the internal wiring can prevent the wiring harness from being worn or dragged and damaged; the shaft sleeve and the shaft sleeve inside the connecting disk are combined, which can effectively save costs.

[0022] 4. In the third and fourth solutions proposed in the present invention, the speed sensor assembly needs to transmit electrical signals, and is arranged on a non-rotating part, which has a simple structure and lower cost; the speed sensor assembly is arranged at the rear end of the core component, has a simple structure, is easy to install and fix, and can effectively reduce costs; the Hall sensor wiring harness can be integrated into the core component wiring harness or be separately routed and fixed on the core wiring harness, which can prevent the wiring harness from being worn or dragged and damaged.

[0023] 5. The present invention adds a self-detection speed component to the existing fan clutch, thereby realizing real-time monitoring of the load speed of the fan clutch. In conjunction with the PLC control module, the clutch engagement time can be controlled, thereby improving abnormal clutch wear, reducing fan noise, and improving the comfort of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is a schematic diagram of the fan clutch structure provided by Example 1 of the present utility model;

[0026] Figure 2 This is a schematic diagram of the fan clutch structure provided by Example 2 of the present utility model;

[0027] Figure 3 This is a schematic structural diagram of the speed sensor assembly provided in Examples 1 and 2 of the present utility model;

[0028] Figure 4 (a) and Figure 4 (b) are schematic diagrams of the structures of the induction code disks provided in Examples 1 and 2 of the present invention;

[0029] Figure 5 This is a schematic diagram of the fan clutch structure provided by Example 3 of the present utility model;

[0030] Figure 6 This is a schematic diagram of the fan clutch structure provided by Example 4 of the present utility model;

[0031] Figure 7 This is a schematic diagram of the rotation speed sensor assembly provided in Example 3 and Example 4 of the present utility model;

[0032] Figure 8 This is a schematic diagram of the induction code disk structure provided by Example 3 and Example 4 of the present utility model;

[0033] In the figure: 101-core shaft, 102-connecting disk, 103-electromagnetic attraction mechanism, 104-driving disk, 105-iron core component, 2-speed sensor assembly, 3-inductive code disk, 201-shaft sleeve, 202-bracket plate, 203-Hall sensor, 301-base disk, 302-tooth plate, 303-through hole.

[0034] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly specified in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Explanation of terms: The terms "installed", "connected", "connected", "fixed" and the like in this utility model should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected, directly connected, or indirectly connected through an intermediate medium; they can be internally connected between two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meaning of the terms in this utility model can be understood according to the specific circumstances. The terms "first", "second", etc. in this utility model are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0038] Example 1

[0039] As mentioned in the background art, existing clutches have problems such as high instantaneous noise of the fan clutch fan and the fan clutch being unable to dynamically and intelligently self-detect whether it is faulty.

[0040] In order to solve the problems mentioned in the background technology, this embodiment proposes a fan clutch assembly that can self-detect the speed, such as Figure 1 As shown, it includes: a core shaft 101, the core shaft 101 has a front end and a rear end (the front end refers to the left side of the figure, and the rear end refers to the right side of the figure), and the core shaft 101 is provided with a connecting disk 102, an electromagnetic attraction mechanism 103, a driving disk 104 and an iron core component 105 in sequence along the direction from the front end to the rear end. The speed sensor assembly 2 is fixed to the front end of the core shaft 101, and the inductive code disk 3 is fixed to the left end face of the connecting disk 102, that is, the side away from the electromagnetic attraction mechanism 103, and is located at the inner ring position of the left end face. The inductive code disk 3 and the speed sensor assembly 2 are arranged opposite to each other in the radial direction of the fan clutch and there is a gap. The radial gap is 2 to 3 mm, and in this embodiment, the core shaft is fixed.

[0041] Furthermore, the structure of the speed sensor assembly 2 is as follows: Figure 3 As shown, it includes: a sleeve 201, a bracket plate 202 and a Hall sensor 203, the Hall sensor 203 is fixed on the bracket plate 202, the bracket plate 202 is fixed on the sleeve 201, the sleeve 201 is fixed to the front end of the core shaft 101, the sleeve 201 is axially positioned in the axial direction by the bearing and the annular protrusion on the bearing, and the bracket plate 202 is a non-magnetic material. Since the core shaft is fixed, the Hall sensor 203 in this embodiment is fixed.

[0042] Furthermore, the speed sensor assembly needs to transmit electrical signals, so placing it on a non-rotating component simplifies the structure and reduces costs. In this solution, the speed sensor assembly is placed at the front end of the mandrel 101, simplifying installation and securing, effectively reducing costs. The Hall effect sensor wiring harness can be routed within the mandrel slot, and internal routing prevents wear and tear or dragging damage.

[0043] Furthermore, the inductive code disk 3 is made of magnetic conductive material, and its structural form is as shown in Figure 4 (a) and Figure 4 (b), including a base disk 301 and tooth plates 302 that are connected to the base disk 301 as a whole and are equidistant and evenly spaced. The base disk 301 and the connecting disk 102 are interference fit, welded, riveted, connected with fasteners, screwed or cast as a whole; it is located at the end of the connecting disk 102; in this embodiment, the base disk 301 of the inductive code disk 3 in Figure 4 (a) on the left is provided with through holes 303 suitable for screws to pass through, and the number of tooth plates is 6; the number of tooth plates of the inductive code disk 3 in Figure 4 (b) on the right is 12; under low-speed working conditions, the more tooth plates there are, the more accurate and stable the detection data is, and a larger number of tooth plates can be used to facilitate precise control.

[0044] By adding a self-detection speed component to the existing fan clutch, real-time monitoring of the load speed of the fan clutch is achieved, solving the problem that the fan clutch cannot dynamically self-detect and determine whether it has failed. This effectively reduces claims for misjudgment of the fan clutch and improves the economy of the clutch product.

[0045] Example 2

[0046] The difference between Example 2 and Example 1 is that, in Example 2, the fixed positions of the rotation speed sensor assembly 2 and the inductive code disk 3 are adjusted.

[0047] Specifically, such as Figure 2As shown, the core shaft 101 is fixed, the speed sensor assembly 2 is fixed on the core shaft 101, and is located between the connecting disk 102 and the electromagnetic attraction mechanism 103, the induction code disk 3 is fixed on the connecting disk 102, and is close to one side of the electromagnetic attraction mechanism 103, that is, it is located on the right end face of the connecting disk 102, and is located at the inner ring position of the right end face; the induction code disk 3 and the speed sensor assembly 2 are arranged opposite to each other in the radial direction of the fan clutch and there is a gap, and the radial gap is 2 to 3 mm.

[0048] Furthermore, the speed sensor assembly needs to transmit electrical signals, and being arranged on a non-rotating part has a simple structure and lower cost. In this embodiment, the speed sensor assembly is arranged between the connecting disk 102 and the electromagnetic attraction mechanism 103, and the speed sensor assembly and the induction code disk are located inside the connecting disk, which can effectively prevent damage caused by sand and gravel foreign objects caused by high-speed rotation of the fan blades; the heat dissipation of the heat dissipation teeth inside the connecting disk can effectively prevent dust from adhering to the Hall sensor; the internal wiring can prevent the wiring harness from being worn or dragged and damaged; the shaft sleeve 201 and the shaft sleeve inside the connecting disk are combined, which can effectively save costs.

[0049] Furthermore, the structure of the speed sensor assembly 2 is as follows: Figure 3 As shown, it includes: a sleeve 201, a bracket plate 202 and a Hall sensor 203, wherein the Hall sensor 203 is fixed on the bracket plate 202, the bracket plate 202 is fixed on the sleeve 201, the sleeve 201 is fixed on the core shaft 101, and axial positioning is performed by the bearing on the core shaft and the sleeve, and the bracket plate 202 is made of non-magnetic material.

[0050] Furthermore, the inductive code disk 3 is made of magnetic conductive material, and its structural form is as shown in Figure 4 (a) and Figure 4 (b), including a base disk 301 and tooth plates 302 that are connected to the base disk 301 as a whole and are equidistant and evenly spaced. The base disk 301 and the connecting disk 102 are interference fit, welded, riveted, connected with fasteners, screwed or cast as a whole; it is located at the end of the connecting disk 102; in this embodiment, the base disk 301 of the inductive code disk 3 in Figure 4 (a) on the left is provided with through holes 303 suitable for screws to pass through, and the number of tooth plates is 6; the number of tooth plates of the inductive code disk 3 in Figure 4 (b) on the right is 12; under low-speed working conditions, the more tooth plates there are, the more accurate and stable the detection data is, and a larger number of tooth plates can be used to facilitate precise control.

[0051] Example 3

[0052] The difference between Example 3 and Example 1 is that in Example 3, the positions of the connecting disk 102 and the driving disk 104 are swapped.

[0053] like Figure 5As shown, this embodiment provides a fan clutch assembly capable of self-detecting rotational speed, including a core shaft 101 having a front end and a rear end ( Figure 3 In the figure, the front end refers to the left side of the figure, and the rear end refers to the rear side of the figure), the core shaft 101 is provided with a driving disk 104, an electromagnetic attraction mechanism 103, a connecting disk 102 and an iron core component 105 in sequence along the direction from the front end to the rear end, the speed sensor assembly 2 is fixed to the rear end of the iron core component 105, and the induction code disk 3 is fixed to the rear end of the connecting disk 102, and is arranged radially opposite to the speed sensor assembly 2 with a gap therebetween.

[0054] Furthermore, the structure of the speed sensor assembly 2 is as follows: Figure 7 As shown, it includes: a bracket plate 202 and a Hall sensor 203, the Hall sensor 203 is fixed on the bracket plate 202, the bracket plate 202 is L-shaped, the bracket plate 202 is fixed on the core component 105, the core component 105 is fixed on the core shaft 101, and axial positioning is performed by the bearing and the sleeve on the core shaft. The bracket plate 202 is a non-magnetic material. Since the core component 105 is fixed, the Hall sensor 203 in this embodiment is fixed.

[0055] Furthermore, the speed sensor assembly needs to transmit electrical signals, so placing it on a non-rotating component simplifies the structure and reduces costs. In this solution, the speed sensor assembly is placed at the rear end of the core component 105, simplifying its installation and securing, effectively reducing costs. The Hall effect sensor wiring harness can be integrated into the core component wiring harness or routed separately and secured to the core wiring harness, preventing damage from wear and drag.

[0056] Furthermore, the induction code disk 3 is made of magnetic conductive material, and its structure is as follows: Figure 8 , including a base plate 301 and tooth plates 302 that are connected to the base plate 301 as a whole and are equidistant and evenly spaced. The number of tooth plates is 6. The base plate 301 is provided with through holes 303 suitable for screws to pass through. The base plate 301 and the connecting plate 102 are connected or screwed together by fasteners; it is located at the rear end of the connecting plate 102; under low speed conditions, the more tooth plates there are, the more accurate and stable the detection data is, and more tooth plates can be used to facilitate precise control.

[0057] Example 4

[0058] The difference between Example 4 and Example 1 is that the core shaft in Example 4 is a rotating shaft structure.

[0059] like Figure 6As shown, it includes a core shaft 101, and the core shaft 101 has a front end and a rear end (the front end refers to the left side of the figure, and the rear end refers to the right side of the figure). The core shaft 101 is provided with a connecting disk 102, an electromagnetic attraction mechanism 103, a driving disk 104 and an iron core component 105 in sequence along the direction from the front end to the rear end. The iron core component 105 is pivotally connected to the core shaft, and the iron core component 105 is fixedly connected to the engine body bracket. The speed sensor assembly 2 is fixed to the rear end of the iron core component 105, and the induction code disk 3 is fixed to the rear end of the connecting disk 102, and is arranged radially opposite to the speed sensor assembly 2 with a gap.

[0060] Furthermore, the structure of the speed sensor assembly 2 is as follows: Figure 7 As shown, it includes: a bracket plate 202 and a Hall sensor 203, the Hall sensor 203 is fixed on the bracket plate 202, the bracket plate 202 is L-shaped, the bracket plate 202 is fixed on the core component 105, the bracket plate 202 is a non-magnetic material, and since the core component 105 is fixedly connected to the engine body bracket, the Hall sensor 203 in this embodiment is fixed.

[0061] Furthermore, the speed sensor assembly needs to transmit electrical signals, so placing it on a non-rotating component simplifies the structure and reduces costs. In this solution, the speed sensor assembly is placed at the rear end of the core component 105, simplifying its installation and securing, effectively reducing costs. The Hall effect sensor wiring harness can be integrated into the core component wiring harness or routed separately and secured to the core wiring harness, preventing damage from wear and drag.

[0062] Furthermore, the induction code disk 3 is made of magnetic conductive material, and its structure is as follows: Figure 8 , including a base plate 301 and tooth plates 302 that are connected to the base plate 301 as a whole and are equidistant and evenly spaced. The number of tooth plates is 6. The base plate 301 is provided with through holes 303 suitable for screws to pass through. The base plate 301 and the connecting plate 102 are connected or screwed together by fasteners; it is located at the rear end of the connecting plate 102; under low speed conditions, the more tooth plates there are, the more accurate and stable the detection data is, and more tooth plates can be used to facilitate precise control.

[0063] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A fan clutch assembly capable of self-detecting rotational speed, characterized in that: include: A fan clutch, a speed sensor assembly and an inductive code disk, wherein the fan clutch includes a core shaft having a front end and a rear end, and a connecting disk, an electromagnetic attraction mechanism, a driving disk and an iron core component are sequentially arranged on the core shaft along the direction from the front end to the rear end; the core shaft is a fixed axis, and the speed sensor assembly is fixed to the front end of the core shaft; the inductive code disk is fixed on the connecting disk, away from the electromagnetic attraction mechanism, and the speed sensor assembly and the inductive code disk are arranged opposite to each other in the radial or axial direction of the fan clutch and there is a gap.

2. A fan clutch assembly capable of self-detecting rotational speed, characterized in that: include: A fan clutch, a speed sensor assembly and an inductive code disk, wherein the fan clutch includes a core shaft having a front end and a rear end, and a connecting disk, an electromagnetic attraction mechanism, a driving disk and an iron core component are sequentially arranged on the core shaft along the direction from the front end to the rear end; the core shaft is a fixed shaft, and the speed sensor assembly is fixed on the core shaft and is located between the connecting disk and the electromagnetic attraction mechanism; the inductive code disk is fixed on the connecting disk, close to the side of the electromagnetic attraction mechanism, and the speed sensor assembly and the inductive code disk are arranged opposite to each other in the radial or axial direction of the fan clutch and there is a gap.

3. A fan clutch assembly capable of self-detecting rotational speed according to any one of claims 1-2, characterized in that: The rotation speed sensor assembly includes a shaft sleeve, a bracket plate and a Hall sensor. The Hall sensor is fixed on the bracket plate, the bracket plate is fixed on the shaft sleeve, and the shaft sleeve is fixed on the core shaft.

4. A fan clutch assembly capable of self-detecting rotational speed according to claim 3, characterized in that: The bracket plate is made of non-magnetic conductive material.

5. The fan clutch assembly capable of self-detecting rotational speed according to claim 3, characterized in that: The induction code disc is made of magnetic conductive material, and a tooth plate is provided at a position where the induction code disc is opposite to the Hall sensor.

6. The fan clutch assembly capable of self-detecting rotational speed according to claim 5, characterized in that: The number of tooth plates of the induction code disk is 4 to 16, and the tooth plates are evenly distributed on the base disk.

7. A fan clutch assembly capable of self-detecting rotational speed, characterized in that: include: A fan clutch, a speed sensor assembly and an inductive code disk, wherein the fan clutch includes a core shaft having a front end and a rear end, and a drive disk, an electromagnetic attraction mechanism, a connecting disk and an iron core component are sequentially arranged on the core shaft along the direction from the front end to the rear end; the core shaft is a fixed shaft, and the speed sensor assembly is fixed to the rear end of the iron core component and is located at the rear end of the core shaft; the inductive code disk is fixed to the rear end of the connecting disk, and the speed sensor assembly and the inductive code disk are arranged relative to each other in the radial or axial direction of the fan clutch and there is a gap.

8. A fan clutch assembly capable of self-detecting rotational speed, characterized in that: include: A fan clutch, a speed sensor assembly and an inductive code disk, wherein the fan clutch includes a core shaft having a front end and a rear end, and a connecting disk, an electromagnetic attraction mechanism, a driving disk and an iron core component are sequentially arranged on the core shaft along the direction from the front end to the rear end; the core shaft is a rotating shaft, and the speed sensor assembly is fixed to the rear end of the iron core component and is located at the rear end of the core shaft; the inductive code disk is fixed to the rear end of the connecting disk, and is arranged opposite to the speed sensor assembly in the radial or axial direction of the fan clutch with a gap therebetween.

9. A fan clutch assembly capable of self-detecting rotational speed according to any one of claims 7-8, characterized in that: The rotation speed sensor assembly includes an L-shaped bracket plate and a Hall sensor, and the Hall sensor is fixed on the bracket plate.

10. A fan clutch assembly capable of self-detecting rotational speed as claimed in claim 9, characterized in that: The induction code disc is made of magnetic conductive material, and a tooth plate is provided at a position where the induction code disc is opposite to the Hall sensor.

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