A quick switching system of a rotational speed sensor and an error-proofing method thereof

Abstract

The application discloses a rotating speed sensor quick switching system and an error-proofing method thereof, and is applied to a bench test of an automobile engine. The system comprises a rotating speed sensor, an electronic control unit, a first switching device and a second switching device. The rotating speed sensor is electrically connected with the first switching device. The electronic control unit is electrically connected with the second switching device. The first device body is provided with a locking structure and a protruding part on the surface. One end of the first device body is provided with a first connector. The second switching device is symmetrically provided with a first clamping block and a second clamping block on the surface. The second device body is provided with a second connector on the front end face. The first switching device and the second switching device can be connected in positive and negative directions. The error-proofing method is applied to the rotating speed sensor quick switching system. After a flywheel is switched, the pin of the rotating speed sensor does not need to be adjusted synchronously, the operation difficulty is reduced, the operation time is shortened, the failure risks such as terminal cracking or wire harness misconnection are avoided, and the bench test efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic and electrical technology of automobile engine bench test, in particular to a rotating speed sensor quick switching system and an error-proof method thereof. BACKGROUND

[0002] Currently, the mainstream flywheel signal tooth has two states of convex tooth and punching, and the corresponding rotating speed sensor has only one state, which is the same in hardware, only the positive and negative function pins of the internal circuit of the sensor are opposite, so two kinds of rotating speed sensor harnesses need to be designed when used. For a complete vehicle, the flywheel basically will not be replaced once installed, and only the corresponding harness needs to be selected according to the state of the flywheel. However, for engine bench test, the same harness needs to complete different tests, and different states of flywheels are often encountered. If the vehicle scheme is followed, not only the types of test harnesses are increased, but also the two types of harnesses are not easy to distinguish for non-professionals from the appearance due to the different internal circuits of the rotating speed sensors, and the harnesses are easy to be installed incorrectly. More troublesome is that the harness needs to be replaced every time a flywheel in a different state is encountered, which is a great workload and increases the time cost, causing waste of bench resources, easy to make mistakes and low efficiency of bench test. SUMMARY

[0003] The present application aims to solve at least one of the technical problems in the prior art. To this end, the present application provides a rotating speed sensor quick switching system and an error-proof method thereof.

[0004] According to the rotating speed sensor quick switching system provided by the first aspect of the present application, the rotating speed sensor is electrically connected to the first switching device; the first switching device includes a first device body, a locking structure is fixedly arranged on the surface of the first device body, a protruding portion is arranged on the surface of the first device body close to the locking structure, an annular rubber plug is sleeved on the surface of the protruding portion, and a first connector portion is arranged at one end of the first device body close to the protruding portion; the first connector portion is provided with a positioning groove along the central axis, and a first connector hole and a second connector hole are symmetrically arranged on the two sides of the positioning groove.

[0005] The electronic control unit is electrically connected to the second switching device; the second switching device is buckled to the first switching device, and the second switching device includes a second device body, a first clamping block is arranged on the surface of the second device body, a second clamping block is symmetrically arranged on the surface of the second device body opposite to the surface where the first clamping block is arranged, a second connector portion is arranged on the front end surface of the second device body, an external connecting groove is arranged on the second connector portion along the central axis direction, an internal connecting groove is coaxially arranged at the bottom of the external connecting groove, and a stop protrusion is arranged at the connection position of the external connecting groove and the internal connecting groove.

[0006] The application discloses a rotating speed sensor quick switching system, which is characterized in that a first switching device and a second switching device are electrically connected between a rotating speed sensor and an electronic control unit, the first switching device and the second switching device are connected through buckling, a locking structure is arranged on the surface of the first switching device, a first connector is arranged at the front end of the first switching device, a first clamping block and a second clamping block are arranged on the surface of the second switching device, a second connector is arranged on the front surface of the second switching device, the first switching device and the second switching device are reversely connected, the first switching device and the second switching device are fixed through the locking structure after being connected, the pin of the rotating speed sensor does not need to be adjusted synchronously after the switching flywheel, and the terminal of the rotating speed sensor connector does not need to be disassembled by a wire harness professional with a professional tool, so that the operation difficulty is reduced, the operation time is shortened, the bench resource is saved, the risk of terminal cracking or wire harness misconnection is avoided, and the bench test efficiency is high.

[0007] According to some embodiments of the application, the locking structure comprises a locking block, a locking hole is arranged on the surface of the locking block close to the first connector, and a guide unlocking block is fixedly arranged at the front end of the locking block. The locking hole is arranged on the inner surface of the locking block, the first clamping block is slid into the locking hole to complete locking after the first switching device and the second switching device are connected, the guide unlocking block is actuated to disconnect the first switching device and the second switching device, the first switching device and the second switching device are disconnected and reversely connected by the operator, the operation difficulty is reduced, and the operation time is shortened.

[0008] According to some embodiments of the application, the inner connecting groove is fixedly provided with a positioning block along the central axis, first and second connecting pins are symmetrically arranged on the two sides of the positioning block, and a guide sliding groove is arranged on the groove wall of the inner connecting groove. The guide sliding groove is vertically arranged on the inner connecting groove bottom along the stop protrusion, the width of the guide sliding groove is equal to the thickness of the guide sliding block, and the thickness of the positioning block is equal to the width of the positioning groove. The first and second connecting pins ensure the electrical connection of the first switching device and the second switching device when the first switching device and the second switching device are connected, the positioning block and the guide sliding groove are arranged, the connection is easier when the first switching device and the second switching device are connected, the stability of the first switching device and the second switching device after connection is ensured, and the electrical connection of the first switching device and the second switching device is prevented from being disconnected due to vibration.

[0009] According to some embodiments of the present application, a blocking ring is fixedly arranged on the surface of the first device body close to the locking structure, and an annular groove is arranged between the blocking ring and the protruding portion; a guide sliding block is fixedly arranged on the side end surface of the first connector portion, and a guide groove is arranged on the surface of the first connector portion close to the positioning groove. Since the test environment is harsh, engine antifreeze and the like often splashes during the test process, and the blocking ring is arranged, and the annular groove is arranged between the blocking ring and the protruding portion, so that short circuit between the first switching device and the second switching device can be effectively avoided.

[0010] According to some embodiments of the present application, a fixed block is arranged on the surface of the second device body close to the first clamping block, the fixed block is L-shaped, and a fixed sliding groove is opened in the axial direction of the fixed block; the length of the first connector portion is equal to the depth of the inner connecting groove, the length of the protruding portion is equal to the depth of the outer connecting groove, and the distance from the first clamping block to the end surface of the second connector portion is equal to the distance from the locking hole to the end surface of the first connector portion. The fixed sliding groove is arranged to facilitate external fixation after the first switching device and the second switching device are connected, and the distance from the first clamping block to the end surface of the second connector portion is equal to the distance from the locking hole to the end surface of the first connector portion, so that the locking mechanism can be effectively locked after the first switching device and the second switching device are connected.

[0011] According to the error-proofing method of the second aspect embodiment of the present application, the error-proofing method is applied to the rapid switching system of the rotating speed sensor of the first aspect embodiment, and the error-proofing method comprises the following steps:

[0012] In step S100, red wires are electrically connected between the rotating speed sensor and the corresponding positive pin of the first switching device, the electronic control unit and the second switching device; and black wires are electrically connected between the rotating speed sensor and the corresponding negative pin of the first switching device, the electronic control unit and the second switching device.

[0013] In step S200, according to the flywheel signal tooth state and the rotating speed sensor electrical parameter information, it is defined that when the punched flywheel is used, the first switching device and the second switching device need to be butt-jointed in the state that the red and black wire colors are consistent in front and back; and when the convex tooth flywheel is used, the first switching device and the second switching device need to be butt-jointed in the state that the red and black wire colors are staggered in front and back.

[0014] In step S300, according to the corresponding relationship between the butt-joint state of the first switching device and the second switching device and the flywheel state, if the signal tooth is the punched flywheel, it is only needed to ensure that the corresponding pin wire color is consistent after the first switching device and the second switching device are butt-jointed; and if the signal tooth is the convex tooth flywheel, it is only needed to ensure that the corresponding pin wire color is staggered after the first switching device and the second switching device are butt-jointed.

[0015] The error-proofing method is applied to the rotating speed sensor quick switching system of the first aspect embodiment, in the face of the current mainstream flywheel signal tooth with two states of convex tooth and punching, and the corresponding rotating speed sensor has only one state, by defining the flywheel with punching signal tooth and the flywheel with convex signal tooth as two different states corresponding to the wire harness connection relationship, and then by changing the positive and negative connection of the first switching device and the second switching device, the problem that the same wire harness needs to complete different tests for the engine bench test is effectively solved, and when the flywheel with different states is encountered, only one wire harness is designed, the pin of the rotating speed sensor does not need to be adjusted synchronously after the flywheel is switched, and the wire harness professional technician also does not need to disassemble the terminal of the rotating speed sensor connector with professional tools for adjustment, so that the operation difficulty is reduced, the operation time is shortened, the bench resources are saved, the failure risks such as terminal cracking or wire harness misconnection are avoided, and the bench test efficiency is high.

[0016] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 is a schematic diagram of a rotating speed sensor quick switching system according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the first switching device and the second switching device according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the first switching device according to an embodiment of the present application;

[0021] Figure 4 is another schematic diagram of the first switching device according to an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the second switching device according to an embodiment of the present application;

[0023] Figure 6 is another schematic diagram of the second switching device according to an embodiment of the present application;

[0024] Figure 7 is still another schematic diagram of the second switching device according to an embodiment of the present application;

[0025] Figure 8 This is a flowchart of a method for preventing errors according to an embodiment of the present invention.

[0026] Figure label:

[0027] 100. First switching device; 110. First device body; 111. Retaining ring; 112. Annular groove; 120. Locking structure; 121. Locking block; 122. Locking hole; 123. Guide unlocking block; 130. Protrusion; 131. Annular rubber plug; 140. First connector; 141. First connector hole; 142. Second connector hole; 143. Positioning groove; 144. Guide groove; 145. Guide slider; 151. First wiring harness; 152. Second wiring harness;

[0028] 200. Second switching device; 210. Second device body; 220. Second connector; 221. Outer groove; 222. Stopping boss; 223. Inner groove; 224. Positioning block; 225. First connector pin; 226. Second connector pin; 227. Guide groove; 228. Lateral groove; 230. Fixing block; 231. Fixing groove; 240. First locking block; 250. Second locking block; 261. Third wiring harness; 262. Fourth wiring harness;

[0029] 300. Speed ​​sensor; 400. Electronic control unit. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Example 1

[0034] As described in the background: for engine bench test, the same set of harness needs to complete different tests, often encounter different state flywheel, if follow the whole vehicle scheme, not only increases the test harness type, and two kinds of harness although the speed sensor internal circuit is different, for non-professional personnel from the appearance is not easy to distinguish, easy to install wrong harness; more troublesome is that each time encounter different state flywheel need to replace the harness, workload is very large, will increase the time cost, not only cause the waste of bench resources, also prone to error, the efficiency of bench test is low.

[0035] Therefore, please refer to Figures 1 to 7 , the embodiment provides a kind of quick switching system of speed sensor, including speed sensor 300 and electronic control unit 400, speed sensor 300 is electrically connected first switching device 100;Specifically, speed sensor 300 is electrically connected with first switching device 100 by first harness 151 and second harness 152, in some embodiments, the first harness 151 and second harness 152 can be distinguished by red and black line;

[0036] As Figure 3 And Figure 4 The first switching device 100 includes first device body 110, the first device body 110 surface is fixedly provided with locking structure 120, the first device body 110 surface close to the locking structure 120 is provided with protruding portion 130, the protruding portion 130 surface is provided with annular rubber plug 131, the first device body 110 one end close to the protruding portion 130 is provided with first connector portion 140;First connector portion 140 is provided with positioning groove 143 along the central axis, first connector hole 141 and second connector hole 142 are symmetrically arranged on the both sides of positioning groove 143;It needs to be explained that, first connector hole 141 and second connector hole 142 inner wall are respectively provided with conductive metal sheet, when connector pin is inserted into first connector hole 141 and second connector hole 142, electrical connection is formed.

[0037] As Figure 2 And Figure 5As shown, the electronic control unit 400 is electrically connected to the second switching device 200; specifically, the electronic control unit 400 is electrically connected to the second switching device 200 through the third wire harness 261 and the fourth wire harness 262, and in some embodiments, the third wire harness 261 and the fourth wire harness 262 can be distinguished by red and black wires; it should be noted that the red and black wires are connected to different pins; the second switching device 200 is snap-connected to the first switching device 100, and the second switching device 200 includes a second device body 210, the surface of the second device body 210 is provided with a first clamping block 240, and the surface of the second device body 210 opposite to the surface where the first clamping block 240 is located is symmetrically provided with a second clamping block 250, the front end surface of the second device body 210 is provided with a second connector 220, the second connector 220 is provided with an external slot 221 along the direction of the central axis, the bottom of the external slot 221 is coaxially provided with an internal slot 223, and the connection between the external slot 221 and the internal slot 223 is provided with a stop boss 222.

[0038] By electrically connecting the first switching device 100 and the second switching device 200 between the speed sensor 300 and the electronic control unit 400, the first switching device 100 and the second switching device 200 are snap-connected, the first switching device 100 is provided with a locking structure 120 on the side surface, the first switching device 100 is provided with a first connector 140 at the front end, the second switching device 200 is provided with a first clamping block 240 and a second clamping block 250 on the two side surfaces, and the second switching device 200 is provided with a second connector at the front end surface, the first switching device 100 and the second switching device 200 can be connected in positive and negative directions to change the connection between the red and black wires corresponding to different pins, and after the first switching device 100 and the second switching device 200 are connected, the locking structure 120 is fixed, after the flywheel is switched, the pins of the speed sensor 300 do not need to be adjusted synchronously, and the terminal of the connector of the speed sensor 300 does not need to be disassembled by a wire harness professional technician and then adjusted, which reduces the operation difficulty, shortens the operation time, saves the bench resources, avoids the risk of failure such as cracking of the terminal of the connector of the speed sensor 300 or misconnection of the wire harness, and improves the efficiency of the bench test.

[0039] As shown in FIG. 6, the first switching device 100 is connected to the second switching device 200, and the second switching device 200 is connected to the electronic control unit 400. Figure 3As shown, the locking structure 120 includes a locking block 121, the locking block 121 is provided with a locking hole 122 near the surface of the first connector 140, and the front end of the locking block 121 is fixedly provided with a guide unlocking block 123. By setting the locking hole 122 on the inner surface of the locking block 121, when the first switching device 100 and the second switching device 200 are connected, the first clamping block 240 slides into the locking hole 122 to complete the locking, and when it is needed to disconnect the first switching device 100 and the second switching device 200, the guide unlocking block 123 can be pulled to disconnect the block. This setting facilitates the operator to disconnect and reverse the connection of the first switching device 100 and the second switching device 200, reduces the operation difficulty, and shortens the operation time.

[0040] In some embodiments, a stop ring 111 is fixedly arranged on the surface of the first device body 110 near the locking structure 120, and an annular groove 112 is arranged between the stop ring 111 and the protruding portion 130; a guide sliding block 145 is fixedly arranged on the side end surface of the first connector 140, and a guide groove 144 is arranged on the surface of the first connector 140 near the positioning groove. When the first switching device 100 and the second switching device 200 are connected, the protruding portion 130 is connected in interference fit with the outer connecting groove 221 of the second switching device 200, and when the first connector 140 is connected with the second connector 220, the side end surface of the stop ring 111 is in close contact with the end surface of the second connector 220. Because the test environment is harsh, engine antifreeze and the like often splash during the test process, by arranging the stop ring 111 and the annular groove 112 between the stop ring 111 and the protruding portion, the short circuit between the first switching device 100 and the second switching device 200 can be effectively avoided

[0041] In some embodiments, as shown in the figure, Figure 7 As shown, the bottom of the inner connecting groove 223 is fixedly provided with a positioning block 224 along the central axis, and the first connecting pin 225 and the second connecting pin 226 are symmetrically arranged on both sides of the positioning block 224, and the guide sliding groove 227 is arranged at the circular arc of the groove wall of the inner connecting groove 223; the guide sliding groove 227 is vertically arranged from the inner connecting groove 223 to the bottom of the inner connecting groove 223 along the stop protrusion 222, the width of the guide sliding groove 227 is equal to the thickness of the guide sliding block 145, and the thickness of the positioning block 224 is equal to the width of the positioning groove;

[0042] The side connecting groove 228 is symmetrically arranged on the side groove wall of the inner connecting groove 223, preferably, the side connecting groove 228 is arranged on both sides of the positioning block 224, which can be arranged as a group of symmetric side connecting grooves 228, and the side connecting groove 228 can achieve better fixing effect after the first switching device 100 and the second switching device 200 are connected;

[0043] The first switch device 100 and the second switch device 200 are electrically connected through the first connector pin 225 and the second connector pin. The positioning block and the guide sliding groove 227 are arranged to make the butt joint easier when the first switch device 100 and the second switch device 200 are butt jointed, and to ensure the stability of the first switch device 100 and the second switch device 200 after the butt joint, so as to avoid the vibration from causing the electrical connection between the first switch device 100 and the second switch device 200 to be disconnected.

[0044] As shown in Figure 5 In some embodiments, the second device body 210 surface close to the first clamping block 240 is provided with a fixed block 230, the fixed block 230 is L-shaped, and the fixed block 230 is provided with a fixed sliding groove along the axis direction; the length of the first connector part 140 is equal to the depth of the inner connecting groove 223, the length of the convex part is equal to the depth of the outer connecting groove 221, and the distance from the first clamping block 240 to the end surface of the second connector part 220 is equal to the distance from the locking hole 122 to the end surface of the first connector part 140. The fixed sliding groove is arranged to facilitate external fixation after the first switch device 100 and the second switch device 200 are connected, and the distance from the first clamping block 240 to the end surface of the second connector part 220 is equal to the distance from the locking hole 122 to the end surface of the first connector part 140, which ensures that the locking mechanism can be effectively locked after the first switch device 100 and the second switch device 200 are connected.

[0045] Embodiment 2

[0046] Please refer to Figure 8 The error-proofing method is applied to the rotating speed sensor quick switching system in Embodiment 1, and the error-proofing method comprises the following steps:

[0047] Step S100: The corresponding rotating speed sensor positive pin of the rotating speed sensor and the first switch device, the electronic control unit and the second switch device is electrically connected by using a red wire; the corresponding rotating speed sensor negative pin of the rotating speed sensor and the first switch device, the electronic control unit and the second switch device 200 is electrically connected by using a black wire;

[0048] Step S200: According to the flywheel signal tooth state and the rotating speed sensor electrical parameter information, it is defined that when a punched flywheel is used, the first switch device and the second switch device need to be butt jointed in a state that the red and black wire colors are consistent in front and back; when a convex tooth flywheel is used, the first switch device and the second switch device need to be butt jointed in a state that the red and black wire colors are staggered in front and back.

[0049] Step S300: According to the corresponding relationship between the docking state of the first switching device and the second switching device and the flywheel state, if the flywheel with punched signal teeth, only the color of the corresponding pin wire harness after the docking of the first switching device and the second switching device needs to be ensured; if the flywheel with convex signal teeth, only the color of the corresponding pin wire harness after the docking of the first switching device and the second switching device needs to be ensured.

[0050] By applying the error-proofing method to the rotating speed sensor quick switching system, in the face of the current mainstream flywheel signal teeth with convex teeth and punched, the corresponding rotating speed sensor has only one state, by defining the flywheel with punched signal teeth and the flywheel with convex signal teeth two different states corresponding to the wire harness connection relationship, and by changing the positive and negative connection of the first switching device 100 and the second switching device 200, the problem that the same wire harness needs to complete different tests when encountering different state flywheels is effectively solved, only one kind of wire harness is designed, the pin of the rotating speed sensor does not need to be adjusted synchronously after the flywheel is switched, at the same time, the terminal of the rotating speed sensor connector does not need to be disassembled by the wire harness professional technician with professional tools, the operation difficulty is reduced, the operation time is shortened, the bench resource is saved, the invalid risk such as terminal cracking or wire harness misconnection is avoided, and the bench test efficiency is high.

[0051] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0052] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0053] It is apparent that the described embodiments are only some, but not all, of the embodiments of the present application. Reference to "an embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As those skilled in the art will appreciate, embodiments described herein can be combined with other embodiments in various ways. All other embodiments obtained by combining the embodiments described herein in various ways are within the scope of the present application.

[0054] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions, and alterations to the embodiments described herein can be made and equivalence thereto can be used without departing from the principles and spirit of the application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A speed sensor fast switching system, comprising a speed sensor and an electronic control unit, characterized in that: It also includes a first switching device, wherein the speed sensor is electrically connected to the first switching device; the first switching device includes a first device body, a locking structure is fixedly provided on the surface of the first device body, a protrusion is provided on the surface of the first device body near the locking structure, an annular rubber plug is sleeved on the surface of the protrusion, and a first insertion part is provided at one end of the first device body near the protrusion; the first insertion part has a positioning groove along the central axis, and a first insertion hole and a second insertion hole are symmetrically provided on both sides of the positioning groove. The electronic control unit is electrically connected to the second switching device; the second switching device is snap-fitted to the first switching device. The second switching device includes a second device body. A first snap-fit ​​block is provided on the surface of the second device body. A second snap-fit ​​block is symmetrically provided on the surface of the second device body opposite to the surface where the first snap-fit ​​block is located. A second insertion part is provided on the front end face of the second device body. An outer groove is provided on the second insertion part along the central axis. An inner groove is coaxially provided at the bottom of the outer groove. A stop protrusion is provided at the connection between the outer groove and the inner groove. A positioning block is fixedly installed at the bottom of the inner groove along the central axis. A first connector and a second connector are symmetrically arranged on both sides of the positioning block. A guide groove is provided on the wall of the inner groove. A guide slider is fixedly provided on the side end face of the first connector, and a guide groove is provided on the surface of the first connector near the positioning groove.

2. The speed sensor fast switching system according to claim 1, characterized in that: The locking structure includes a locking block, a locking hole is provided on the surface of the locking block near the first insertion part, and a guide unlocking block is fixedly provided at the front end of the locking block.

3. The speed sensor fast switching system according to claim 1, characterized in that: The guide groove is vertically opened along the stop protrusion to the bottom of the inner groove. The width of the guide groove is equal to the thickness of the guide slider, and the thickness of the positioning block is equal to the width of the positioning groove.

4. The speed sensor fast switching system according to claim 1, characterized in that: A retaining ring is fixedly provided on the surface of the first device body near the locking structure, and an annular groove is provided between the retaining ring and the protrusion.

5. A speed sensor fast switching system according to claim 1, characterized in that: A fixing block is provided on the surface of the second device body near the first snap-fit ​​block. The fixing block is L-shaped and has a fixing groove along the axis of the second device body.

6. The speed sensor fast switching system according to claim 1, characterized in that: The length of the first connector is equal to the depth of the inner groove, and the length of the protrusion is equal to the depth of the outer groove.

7. A speed sensor fast switching system according to claim 1, characterized in that: The distance from the first latching block to the end face of the second connector is equal to the distance from the locking hole to the end face of the first connector.

8. A method for error prevention, characterized in that, The error prevention method is applied to a speed sensor fast switching system as described in any one of claims 1-7, comprising: Step S100: The positive pins of the speed sensors corresponding to the speed sensor and the first switching device, and the electronic control unit and the second switching device are all electrically connected with red wires; the negative pins of the speed sensors corresponding to the speed sensor and the first switching device, and the electronic control unit and the second switching device are all electrically connected with black wires. Step S200: Based on the flywheel signal tooth status and the electrical parameter information of the speed sensor, define that when using a perforated flywheel, the first switching device and the second switching device need to be connected with the red and black wires in the same color position, and when using a toothed flywheel, the first switching device and the second switching device need to be connected with the red and black wires staggered in the opposite direction. Step S300: Based on the correspondence between the docking state of the first switching device and the second switching device and the flywheel state, if the signal tooth is a punched flywheel, then the corresponding pin harness colors are the same after docking the first switching device and the second switching device; if the signal tooth is a convex flywheel, then the corresponding pin harness colors are staggered after docking the first switching device and the second switching device.

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