Magnetic rotational speed signal disc structure

Abstract

The application provides a magnetic rotating speed signal disc structure and belongs to the technical field of signal discs. The magnetic rotating speed signal disc structure comprises a supporting mechanism and a magnetic structure. The supporting mechanism comprises a mounting plate and a supporting plate. The supporting plate is annular. The magnetic structure comprises a spaced magnetic ring, a connecting plate and a fixing piece. The spaced magnetic ring is sleeved outside the supporting plate. By arranging the mounting plate and the supporting plate, an inner ring with stable structure and light weight can be formed. By arranging the spaced magnetic ring, the connecting plate and the fixing piece, the traditional convex tooth and concave tooth structure can be replaced. In the rotating process, the alternating magnetic poles can change the magnetic field around the sensor periodically like the traditional convex tooth, finally generate the rotating speed signal with the same principle, greatly reduce the volume and the weight, and ensure the synchronous rotation through the connecting plate and the fixing piece. In addition, the connecting plate and the fixing piece can be disassembled, maintained and replaced in the later period, and the practicability is improved.

Description

Technical Field

[0001] This application relates to the field of signal disks, and more specifically, to a magnetic speed signal disk structure. Background Technology

[0002] The crankshaft speed signal disc is a crucial component in an internal combustion engine. It is directly formed using a precision stamping process, and its primary function is to enable the crankshaft position sensor to accurately read the crankshaft's speed and position information. Simultaneously, with increasingly stringent fuel consumption regulations, the demand for lightweight engine components is growing. Traditional speed signal discs are typically made of carbon structural steel, featuring a toothed or hollowed-out structure with evenly distributed teeth. The outer ring has missing teeth to detect signals. When the signal disc rotates, the teeth pass over the front of the speed sensor, causing periodic changes in the magnetic field strength. The sensor detects these changes and outputs a corresponding pulse voltage signal. This signal is shaped and amplified by internal circuitry, outputting a regular square wave pulse with a frequency proportional to the engine speed, which is then read by the controller.

[0003] Currently, traditional speed signal disks are usually made of carbon structural steel, which requires a convex and concave tooth structure. There are also requirements for the number and width of the teeth. As a result, the signal disks often need to be made with a large diameter and heavy weight, and the space layout is limited. Summary of the Invention

[0004] To overcome the shortcomings of the existing system, this application provides a magnetic speed signal disk structure that solves the problem that traditional speed signal disks are usually made of carbon structural steel, which requires a convex and concave tooth structure, and there are also requirements for the number and width of the teeth. As a result, the signal disks often need to be made with a large diameter, heavy weight, and limited space layout.

[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0006] A magnetic speed signal disk structure includes a support mechanism and a magnetic structure.

[0007] The support mechanism includes a mounting plate and a support plate. The support plate is ring-shaped and is vertically fixed to the mounting plate.

[0008] The magnetic structure includes a spacer magnetic ring, a connecting plate, and a fixing member. The spacer magnetic ring is sleeved on the outside of the support plate. The connecting plate is fixedly connected inside the spacer magnetic ring and inserted into the support plate. The fixing member is fixedly connected to the connecting plate and the support plate.

[0009] In one specific implementation, the spacer magnetic ring is divided into a magnetized region, a non-magnetic region, and a demagnetized region, with the magnetized region and the non-magnetic region arranged alternately.

[0010] In the above implementation process, by setting a magnetized area, a non-magnetic area, and a demagnetized area, the traditional convex and concave tooth structure is replaced. During the rotation process, the alternating magnetic poles will cause the magnetic field around the sensor to change periodically, just like the traditional convex teeth, and finally generate a rotation speed signal based on the same principle. The demagnetized area replaces the toothless area.

[0011] In one specific implementation, the mounting plate has through-shaft holes and mounting holes, and there are multiple mounting holes arranged around the through-shaft holes.

[0012] In the above implementation process, a through hole is opened for the mounting shaft to pass through and then be fitted onto the turntable. The mounting hole is used for bolts to be passed through and fixed to the turntable for mounting.

[0013] In one specific implementation, the mounting plate and the support plate are integrally formed, and both the mounting plate and the support plate are thin steel plates.

[0014] In the above process, the structural strength of the integrated mounting plate and support plate is guaranteed, and the thin steel plate can meet the structural strength requirements while reducing weight.

[0015] In one specific implementation, the support plate has a socket, and the connecting plate is inserted into the socket.

[0016] In the above implementation process, by opening a socket, the connecting plate is inserted into the socket for connection, and the rotation of the annular support plate can synchronously drive the connecting plate and the spacer magnetic ring to rotate.

[0017] In one specific implementation, the fastener includes a first bolt group and a second bolt group, the first bolt group passing through the connecting plate and threadedly connected to the support plate, and the second bolt group passing through the connecting plate and threadedly connected to the support plate.

[0018] In the above implementation process, by setting a first bolt group and a second bolt group, the two bolt groups pass through the T-shaped connecting plate and are then tightened into the threaded holes on the inner side of the support plate to achieve fixation, which can be disassembled and replaced during subsequent maintenance.

[0019] The advantages of this embodiment are: by setting an mounting plate and a support plate, a structurally stable and lightweight inner ring can be formed; by setting an interval magnetic ring, a connecting plate and a fixing component, the traditional convex and concave tooth structure can be replaced; during rotation, the alternating magnetic poles will cause the magnetic field around the sensor to change periodically, just like traditional convex teeth, and finally generate a rotation speed signal based on the same principle, which can greatly reduce the size and weight; at the same time, the connecting plate and the fixing component can ensure synchronous rotation and can also be disassembled, repaired and replaced later, which improves practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the magnetic speed signal disk structure provided in the embodiments of this application;

[0021] Figure 2 A schematic diagram of the support mechanism structure provided for the embodiments of this application;

[0022] Figure 3 A schematic diagram of the mounting plate structure provided for an embodiment of this application;

[0023] Figure 4 A schematic diagram of the fastener structure provided for an embodiment of this application;

[0024] Figure 5 A schematic diagram of the spaced magnetic ring structure provided for an embodiment of this application.

[0025] In the diagram: 100 - Support mechanism; 110 - Mounting plate; 111 - Through-shaft hole; 112 - Mounting hole; 120 - Support plate; 121 - Insert; 200 - Magnetic structure; 210 - Spaced magnetic ring; 211 - Magnetized area; 212 - Non-magnetic area; 213 - Depleted magnetic area; 220 - Connecting plate; 230 - Fixing component; 231 - First bolt group; 232 - Second bolt group. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments.

[0027] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0028] In the embodiments, unless otherwise specified, all methods used are conventional methods in the art.

[0029] Please see Figures 1-5 This application provides a magnetic speed signal disk structure including a support mechanism 100 and a magnetic structure 200.

[0030] Please see Figure 1 , 2 3. The support mechanism 100 includes a mounting plate 110 and a support plate 120. The support plate 120 is ring-shaped and is vertically fixed to the mounting plate 110.

[0031] It should be noted that the mounting plate 110 and the support plate 120 are integrally formed, and both the mounting plate 110 and the support plate 120 are thin steel plates. The structural strength of the integrally formed mounting plate 110 and the support plate 120 is guaranteed, and the thin steel plates can meet the structural strength requirements while reducing weight.

[0032] Please see Figure 1 , 3 4 and 5, the magnetic structure 200 includes a spacer magnetic ring 210, a connecting plate 220 and a fixing member 230. The spacer magnetic ring 210 is sleeved on the outside of the support plate 120. The connecting plate 220 is fixedly connected inside the spacer magnetic ring 210 and inserted into the support plate 120. The fixing member 230 is fixedly connected to the connecting plate 220 and the support plate 120.

[0033] The spacer magnetic ring 210 is divided into a magnetized area 211, a non-magnetic area 212, and a demagnetized area 213. The magnetized area 211 and the non-magnetic area 212 are arranged alternately. By setting the magnetized area 211, the non-magnetic area 212, and the demagnetized area 213, the traditional convex and concave tooth structure is replaced. During the rotation process, the alternating magnetic poles will cause the magnetic field around the sensor to change periodically, just like the traditional convex teeth, and finally generate a rotation speed signal based on the same principle. The demagnetized area 213 replaces the toothless area. The magnetized area 211 can use neodymium iron boron magnets, but is not limited to neodymium iron boron magnets.

[0034] Traditional carbon steel signal disks, to ensure the impact and fatigue resistance of the mechanical teeth, are typically no less than 2.5-3mm thick; thinner disks are prone to deformation or breakage during high-speed rotation. In contrast, the thickness of magnetic materials, especially thin neodymium iron boron magnets or magnetic alloy sheets, can be reduced to 0.5-1.5mm. This significantly reduces the axial dimension of the signal disk while maintaining magnetic signal strength. Combined with a smaller diameter, the overall volume can be reduced by more than half.

[0035] Specifically, the mounting plate 110 has a through-shaft hole 111 and a mounting hole 112. Multiple mounting holes 112 are provided and arranged around the through-shaft hole 111. The through-shaft hole 111 is used to pass the mounting shaft through and then fit it onto the turntable. The mounting hole 112 is used to pass bolts through and fix the shaft to the turntable.

[0036] In this embodiment, the support plate 120 has a socket 121, and the connecting plate 220 is inserted into the socket 121. By opening the socket 121, the connecting plate 220 is inserted into the socket 121 for connection, and the rotation of the annular support plate 120 can synchronously drive the connecting plate 220 and the spacer magnetic ring 210 to rotate.

[0037] In this embodiment, the fastener 230 includes a first bolt group 231 and a second bolt group 232. The first bolt group 231 passes through the connecting plate 220 and is threaded to the support plate 120. The second bolt group 232 passes through the connecting plate 220 and is threaded to the support plate 120. By setting the first bolt group 231 and the second bolt group 232, the two groups of bolts pass through the T-shaped connecting plate 220 and are then tightened into the threaded holes on the inner side of the support plate 120 to achieve fixation, which can be disassembled and replaced during subsequent maintenance.

[0038] The working principle of this magnetic speed signal disk structure is as follows: In use, the spacer magnetic ring 210 is fitted onto the annular support plate 120, and the connecting plates 220 are aligned and inserted into the socket 121. Then, the first bolt group 231 and the second bolt group 232 are tightened and fixed. Next, the whole assembly is first fitted onto the crankshaft end to be installed through the through-shaft hole 111. Then, the mounting plate 110 is rotated so that the mounting hole 112 on the mounting plate 110 is aligned with the threaded hole on the crankshaft. Then, the bolts are tightened and fixed. The magnetized area 211 and the non-magnetic area 212 on the spacer magnetic ring 210 replace the traditional convex and concave tooth structure. During the rotation, the alternating magnetic poles will cause the magnetic field around the sensor to change periodically, just like the traditional convex teeth, and finally generate a speed signal based on the same principle. Compared with the traditional convex and concave tooth structure, it can accommodate a smaller sensor installation space, indirectly reducing the system size. The material thickness is thinner, further compressing the overall volume. It is also easy to disassemble and replace parts, and the cost is low.

[0039] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A magnetic speed signal disk structure, characterized in that, include A support mechanism (100) includes a mounting plate (110) and a support plate (120), the support plate (120) being annular and vertically fixedly connected to the mounting plate (110); A magnetic structure (200) includes a spacer magnetic ring (210), a connecting plate (220), and a fixing member (230). The spacer magnetic ring (210) is sleeved on the outside of the support plate (120). The connecting plate (220) is fixedly connected inside the spacer magnetic ring (210) and inserted into the support plate (120). The fixing member (230) is fixedly connected to the connecting plate (220) and the support plate (120).

2. The magnetic speed signal disk structure according to claim 1, characterized in that, The spacer magnetic ring (210) is divided into a magnetized region (211), a non-magnetic region (212) and a demagnetized region (213), with the magnetized region (211) and the non-magnetic region (212) arranged alternately.

3. The magnetic speed signal disk structure according to claim 1, characterized in that, The mounting plate (110) has a through-shaft hole (111) and mounting holes (112), and multiple mounting holes (112) are provided, and the multiple mounting holes (112) are arranged around the through-shaft hole (111).

4. The magnetic speed signal disk structure according to claim 1, characterized in that, The mounting plate (110) and the support plate (120) are integrally formed, and both the mounting plate (110) and the support plate (120) are thin steel plates.

5. The magnetic speed signal disk structure according to claim 1, characterized in that, The support plate (120) has a socket (121), and the connecting plate (220) is inserted into the socket (121).

6. The magnetic speed signal disk structure according to claim 1, characterized in that, The connecting plate (220) is T-shaped, and the connecting plate (220) and the spacer magnetic ring (210) are integrally formed.

7. The magnetic speed signal disk structure according to claim 1, characterized in that, The fastener (230) includes a first bolt group (231) and a second bolt group (232). The first bolt group (231) passes through the connecting plate (220) and is threaded to the support plate (120). The second bolt group (232) passes through the connecting plate (220) and is threaded to the support plate (120).

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