Displacement sensor sensing device for automobile rear wheel steering gear

Abstract

The invention relates to the technical field of automobiles, and discloses a displacement sensor induction device used for an automobile rear wheel steering gear, the displacement sensor induction device comprises a shell and a sensor, the shell and the sensor are connected through a first bolt and a second bolt, and an induction sheet is installed below the sensor. A first positioning screw and a second positioning screw are connected to the left side and the right side of the induction piece in a penetrating mode. According to the displacement sensor sensing device used by the automobile rear wheel steering gear, the problem that the precision is difficult to guarantee after the movable block is matched with the sensing sheet is solved, and the scheme that the sensing sheet, the two positioning screws and the gasket are used for replacing the existing four part sensing devices of the sensing sheet, the bolt, the rubber ring and the movable block is adopted; wherein the movable block, the induction sheet and the rubber ring are all parts needing to be customized for mold opening, but according to the technical scheme, special customized mold opening parts are reduced, the types of the parts are also reduced, meanwhile, assembly is simpler, and the obvious effect on cost reduction is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, in particular to a displacement sensor sensing device used for an automobile rear wheel steering gear. Background Art

[0002] The rear-wheel steering gear of a car is an important part of the car's steering system. It is mainly responsible for controlling the steering action of the car's rear wheels. In the field of modern automotive engineering, with the continuous advancement of automotive technology, the design and performance of the rear-wheel steering gear are also being continuously optimized to meet consumers' higher requirements for vehicle handling, stability and safety.

[0003] The displacement sensor sensing device used in the rear-wheel steering gear of a car is a component that can accurately measure the displacement of the steering gear screw, connecting rod or connecting shaft. It plays a vital role in the rear-wheel steering system of the car and is mainly used to monitor the position changes of the rear-wheel steering knuckle or related steering components.

[0004] The linear displacement sensor used in the rear-wheel steering system is a linear device based on metal induction. The design of the sensor adopts the working principle of the eddy current effect and its function is to convert various measured physical quantities into digital quantities. In the current design, a sensing device needs to be set 0.7 mm away from the functional surface of the sensor 103.

[0005] The displacement sensor sensing device structure used in the rear wheel steering gear in the prior art is as shown in the attached figure. Figure 1 As shown, the sensor 103 and the housing 101 are connected by bolts 104 and 105. Usually, the sensor is designed with 4 to 6 bolts. For the convenience of explanation, the sensor 103 is cut. The induction sheet 106 connects the movable block 107 with the shaft 102 through a bolt 108 and a rubber ring 109. In this way, when the shaft 102 moves in the housing 101, it will move with the induction sheet 106. The change of the position of the induction sheet 106 affects the change of the output of the sensor 103. The value set on the ECU control system will feedback the current position of the sensor 103 in real time, and the matching operating system is added to ensure the accuracy of the sensor output signal; As attached Figure 2 The four parts of the sensor sheet 106, the movable block 107, the bolt 108 and the rubber ring 109 constitute the sensor sensing device. The sensor sheet 106 is designed with SUS304 or 65Mn, which can be formed by stamping molds; the movable block 107 is a plastic mold part, made of nylon or POM; the bolt 108 is a steel part; the rubber ring 109 is a rubber part, which is vulcanized.

[0006] The above-mentioned existing technologies have the following problems: First, the sensor sheet 106 is suitable for stamping during mass production, but this part is relatively small and requires high precision, which increases the manufacturing difficulty and cost; second, the sensor sheet 106 has two snap-fit ​​structures, and deformation will occur when the sensor sheet 106 is installed on the movable block 107, which may affect the flatness of the surface of the sensor sheet 106 after assembly; third, the movable block 107 needs to cooperate with the sensor sheet 106 and the shaft 102 at the same time, so the mold precision of the movable block 107 is also required to be high, so as to ensure the overall flatness and precision of the sensing device, but this will increase the manufacturing difficulty and cost.

[0007] It can be seen that a displacement sensor sensing device used in a rear wheel steering gear of an automobile is needed to solve the problem mentioned in the above background technology that the accuracy of the sensing sheet and the movable block is difficult to ensure and the accuracy is affected after assembly. Summary of the invention

[0008] The purpose of the present invention is to provide a displacement sensor sensing device used in a rear wheel steering gear of an automobile to solve the problems raised in the above background technology.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a displacement sensor sensing device used in a rear wheel steering gear of an automobile, comprising a housing and a sensor, wherein the housing and the sensor are connected by a first bolt and a second bolt, a sensing sheet is installed below the sensor, and a first positioning screw and a second positioning screw are penetrated and connected on both sides of the sensing sheet, a first gasket is arranged below the first positioning screw, and a second gasket is arranged below the second positioning screw, and the sensing sheet is installed on a square shaft by means of the first positioning screw, the second positioning screw, the first gasket and the second gasket; The square shaft is movably mounted inside the housing.

[0010] Preferably, the number of the first bolts and the second bolts is two groups respectively, the two groups of the first bolts and the second bolts are symmetrically arranged about the longitudinal center axis of the sensor, and the housing and the sensor are detachably connected by the first bolts and the second bolts.

[0011] Preferably, light holes are opened on both sides of the left and right sides of the sensing plate, and the light holes match the step smooth surfaces of the first positioning screw and the second positioning screw, and threaded holes are opened correspondingly inside the square shaft, and the first positioning screw and the second positioning screw pass through the sensing plate and extend into the interior of the square shaft to connect with it.

[0012] Preferably, the induction sheet is formed in one step by a stamping die, and the induction sheet is made of steel.

[0013] Preferably, the first positioning screw, the first gasket, the second positioning screw and the second gasket are all made of steel.

[0014] Preferably, the first positioning screw and the second positioning screw are screws with steps, and the smooth surface of the step matches the smooth surface of the step of the square shaft threaded hole.

[0015] Preferably, the induction sheet is a "J"-shaped structure.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the sensor sensing device of the present invention solves the problem that it is difficult to ensure the accuracy after the movable block and the sensing sheet are matched. A sensing sheet, two positioning screws and a gasket, a total of three parts, replace the current sensing device solution of four parts, namely, the sensing sheet, bolts, rubber rings and movable blocks. Among them, the movable block, the sensing sheet and the rubber ring are all parts that require customized molds, and the technical solution reduces the number of special customized mold parts and the number of parts. At the same time, the assembly is also simpler, which has a significant effect on reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A displacement sensor sensing device structure used in a rear wheel steering gear in the prior art; Figure 2 It is an exploded diagram of the structure of a displacement sensor sensing device in the prior art; Figure 3 A diagram of a displacement sensor sensing device used in the rear wheel steering device of an automobile of the present invention; Figure 4 An exploded view of the structure of the displacement sensor sensing device used in the rear wheel steering gear of the present invention; Figure 5 It is a cross-sectional view of the structure of the sensing device of the present invention; Figure 6 For the present invention Figure 5 A magnified view of the structure at A.

[0018] Among them: 201, housing; 202, square shaft; 203, sensor; 204, first bolt; 205, second bolt; 206, induction sheet; 207, first positioning screw; 208, first gasket; 209, second positioning screw; 210, second gasket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0020] See also Figure 1-Figure 6, A displacement sensor induction device used in an automotive rear-wheel steering gear. The sensor 203 and the housing 201 are connected by the first bolt 204 and the second bolt 205. The sensor is designed with 4 bolts. The induction sheet 206, the first positioning screw 207, the second positioning screw 209, the first gasket 208 and the second gasket 210 constitute the sensor induction device. The first positioning screw 207 and the second positioning screw 209 fix the induction sheet 206 on the square shaft 202 through the first gasket 208 and the second gasket 210. When the square shaft 202 moves in the housing 201, it drives the entire induction device. The change in the position of the induction sheet 206 affects the change in the output of the sensor 203. The value set on the ECU control system will feedback the current position of the sensor 203 in real time, plus a matching operating system to ensure the accuracy of the sensor output signal.

[0021] In this embodiment, the threaded parts of the first positioning screw 207 and the second positioning screw 209 can be coated with thread locking adhesive, so that the bolts are less likely to loosen after the induction device works for a long time, ensuring more reliable operation. The positioning screws can be made integral with the gaskets, making the assembly simpler. The induction sheet can also be formed by machining. The shape of the induction sheet is not limited to the shape similar to the Chinese character "ji" shown in the figure and can also be made into other shapes.

[0022] Specifically, the induction sheet 206 is a stamping die part formed in one step, and the material is 304 steel. The first positioning screw 207, the second positioning screw 209, the first gasket 208 and the second gasket 210 are steel parts. There are two mounting holes on the induction sheet 206, and these two holes are positioning holes with relatively high precision. The first positioning screw 207 and the second positioning screw 209 are stepped positioning screws. The smooth part of the stepped surface is matched with the stepped smooth surface of the threaded hole of the square shaft 202. In this way, when the first positioning screw 207 and the second positioning screw 209 fix the induction sheet 206 through the first gasket 208 and the second gasket 210, the position accuracy and flatness of the induction sheet 206 are ensured, and the first gasket 208 and the second gasket 210 also play a role in preventing the bolts from loosening.

[0023] In this embodiment, the induction sheet 206 is a single part, formed by die stamping or machining. The shape can be in the shape of "ji" or other shapes. It is directly fixed on the shaft through the positioning screws and gaskets without using movable blocks or other parts. There are stepped surfaces on the positioning bolts and the mating shaft for mutual cooperation. The threaded part of the positioning bolt is coated with thread locking adhesive to prevent the bolts from loosening, comprehensively achieving the purpose of controlling the accuracy.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A displacement sensor sensing device used in a rear wheel steering gear of an automobile, comprising a housing (201) and a sensor (203), characterized in that: The housing (201) and the sensor (203) are connected by a first bolt (204) and a second bolt (205); a sensing sheet (206) is installed below the sensor (203); and a first positioning screw (207) and a second positioning screw (209) are connected through both left and right sides of the sensing sheet (206); a first gasket (208) is arranged below the first positioning screw (207); and a second gasket (210) is arranged below the second positioning screw (209); the sensing sheet (206) is installed on the square shaft (202) by means of the first positioning screw (207), the second positioning screw (209), the first gasket (208) and the second gasket (210); The square shaft (202) is movably installed inside the housing (201).

2. The displacement sensor sensing device used for a rear wheel steering gear of an automobile according to claim 1, characterized in that: The number of the first bolts (204) and the second bolts (205) is two groups, and the two groups of the first bolts (204) and the second bolts (205) are symmetrically arranged about the longitudinal center axis of the sensor (203), and the housing (201) and the sensor (203) are detachably connected via the first bolts (204) and the second bolts (205).

3. The displacement sensor sensing device used for a rear wheel steering gear of an automobile according to claim 1, characterized in that: Light holes are provided on both left and right sides of the sensing sheet (206), and the light holes match the stepped surfaces of the first positioning screw (207) and the second positioning screw (209). Corresponding threaded holes are provided inside the square shaft (202), and the first positioning screw (207) and the second positioning screw (209) penetrate the sensing sheet (206) and extend into the interior of the square shaft (202) to be connected thereto.

4. The displacement sensor sensing device used for a rear wheel steering device of an automobile according to claim 1, characterized in that: A spring is provided inside the housing (201) at one end of the square shaft (202).

5. The displacement sensor sensing device used for a rear wheel steering device of an automobile according to claim 1, characterized in that: The induction sheet (206) is formed in one step by a stamping die, and the induction sheet (206) is made of 304 steel.

6. The displacement sensor sensing device used for a rear wheel steering device of an automobile according to claim 1, characterized in that: The first positioning screw (207), the first gasket (208), the second positioning screw (209) and the second gasket (210) are all made of steel.

7. The displacement sensor sensing device used for a rear wheel steering device of an automobile according to claim 1, characterized in that: The first positioning screw (207) and the second positioning screw (209) are screws with steps, and the smooth surface of the step matches the smooth surface of the step of the threaded hole of the square shaft (202).

8. The displacement sensor sensing device used for a rear wheel steering device of an automobile according to claim 1, characterized in that: The induction plate (206) is a "J"-shaped structure.

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