Throttle manipulator magnetic steel fixing structure

Abstract

The utility model relates to an accelerator manipulator magnetic steel fixing structure, which comprises a disc body and a magnetic field shielding ring, the rear end face of the disc body is provided with two protruding parts extending backwards in the axial direction, the two protruding parts are arranged in an axial symmetry mode along an axial symmetry straight line passing through the center of the disc body, and the magnetic field shielding ring is sleeved outside the two protruding parts to form four clamping grooves. The axial length of each clamping groove is at least equal to the width of the magnetic steel sheet, the width of each clamping groove in the left-right direction is equal to the thickness of the magnetic steel sheet, the two clamping grooves located on the same side of the two protruding parts are opposite, and the distance between the two clamping grooves is equal to the length of the magnetic steel sheet, so that the two ends of the magnetic steel sheet can be exactly clamped into the two opposite clamping grooves. Not only is the effect of stabilizing and fixing the magnetic steel sheets achieved, but also magnetic field signals can be prevented from being interfered by external signals under the action of the magnetic field shielding ring.

Description

Technical Field

[0001] This utility model belongs to the technical field of throttle control, and in particular relates to a magnet fixing structure for throttle control. Background Technology

[0002] Electromagnetic induction angle detection solutions are widely used in throttle control systems of engineering vehicles, agricultural machinery, and general power equipment due to their advantages such as fast response speed and no contact wear. Its core principle is as follows: a magnet is fixed on a shaft linked to the control handle. A Hall effect sensor unit detects changes in the magnetic field (such as changes in magnetic induction intensity or direction) as the magnet rotates, converting the shaft's rotation angle into an electrical signal, thereby achieving real-time monitoring and control of the throttle opening.

[0003] In existing technologies, the fixing structure of magnets mainly focuses on mechanical stability, and common solutions include:

[0004] Adhesive fixing: The magnet is directly bonded to the end face of the shaft core or the disc using adhesives such as epoxy resin;

[0005] Clip-on fixing: elastic clips are set on the shaft core or disc, and the edge of the magnet is clamped by the claws;

[0006] Fixing with clamping plates: Metal clamping plates are used in conjunction with screws to press the magnets firmly against the mounting surface.

[0007] However, the above solutions only address the "mechanical fixing" problem of the magnets, lacking shielding protection for the magnetic field signals. This makes the magnetic field detection accuracy susceptible to interference in practical applications, leading to a decrease in detection accuracy and severely impacting the control performance and reliability of the throttle controller. Therefore, a new fixing structure is urgently needed that can both securely fix the magnets and effectively shield them from magnetic field interference. Utility Model Content

[0008] Based on this, and in response to the aforementioned technical problems, a magnet fixing structure for a throttle control is provided.

[0009] The technical solution adopted in this utility model is as follows:

[0010] A magnet fixing structure for a throttle control is characterized by comprising a disc body and a magnetic field shielding ring. The disc body is concentrically fixed to the rear end of a shaft core. The rear end face of the disc body forms two axially extending protrusions. The two protrusions are axially symmetrically arranged along an axisymmetric line passing through the center of the disc body. Each protrusion has a first plane and a second plane perpendicularly connected to the first plane on its left and right sides relative to the other protrusion. The first plane faces the other protrusion. The second plane is located inside the first plane along the axisymmetric line. The magnetic field shielding ring is fitted around the two protrusions. Two opposing third planes are formed on its inner wall. The two third planes are symmetrically arranged and parallel to the second plane. The first, second, and third planes on the same side enclose a slot, for a total of four slots. The axial length of each slot is at least equal to the width of the magnet sheet, and the width in the left and right direction is equal to the thickness of the magnet sheet. The two slots located on the same side of the two protrusions are opposite each other, and the distance between the two slots is equal to the length of the magnet sheet.

[0011] The magnetic steel fixing structure of this utility model allows the two ends of the magnetic steel sheet to be precisely inserted into two opposite slots, which not only stabilizes and fixes the magnetic steel sheet, but also prevents the magnetic field signal from being interfered with by external signals under the action of the magnetic field shielding ring. Attached Figure Description

[0012] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 A three-dimensional structural diagram of a manual throttle controller provided for an embodiment of this utility model;

[0014] Figure 2 An exploded view of a manual throttle controller provided for an embodiment of this utility model;

[0015] Figure 3 This is a radial sectional view of the rear housing according to an embodiment of the present invention;

[0016] Figure 4 This is a three-dimensional structural diagram of the rear housing according to an embodiment of the present utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the shaft core according to an embodiment of the present utility model. Figure 1 ;

[0018] Figure 6 This is a three-dimensional structural diagram of the shaft core according to an embodiment of the present utility model. Figure 2 ;

[0019] Figure 7 This is an axial sectional view of an embodiment of the present utility model;

[0020] Figure 8 This is a schematic diagram of the magnetic component fixing structure fixed to the rear end of the shaft core according to an embodiment of the present invention;

[0021] Figure 9 This is a three-dimensional structural diagram of the magnetic component fixing structure according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 10 This is a schematic diagram of the structure of the disk body of the magnetic component fixing structure according to an embodiment of the present utility model;

[0023] Figure 11 This is a three-dimensional structural diagram of the magnetic component fixing structure according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0024] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of this utility model. The following corresponding embodiments are only for clearly illustrating the utility model content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the described embodiments. Any obvious variations or modifications that fall within the technical concept and utility model content of this utility model are also within the protection scope of this utility model.

[0025] like Figure 1 , Figure 2 and Figure 8 As shown, this application provides a manual throttle controller, including a housing 1100, a shaft core 1200, a hand-operated component 1300, a magnetic component 1400, a magnetic component fixing structure 1500, a limiting ring 1600, a retaining ring 1700, an elastic self-recovering component 1800, a washer 1900, and a Hall sensor unit 1999.

[0026] The outer casing 1100 consists of a front cover 1110 and a rear casing 1120, which are fixed together by bolts.

[0027] like Figure 1 As shown, the front cover 1110 has a mounting hole 1111 and a through hole. The mounting hole 1111 is used to mount the actuator to the vehicle, and the through hole is used for the shaft core 1200 to pass through.

[0028] The rear housing 1120 is cylindrical and forms a cavity inside after being fixed to the front cover 1110.

[0029] like Figure 3As shown, the upper part of the circumferential inner wall of the cavity has two inclined surfaces 1121, which are symmetrically arranged along the vertical center line of the rear housing 1120. The lower part of the circumferential inner wall of the cavity also has two inclined surfaces 1121, which are symmetrically arranged along the vertical center line of the rear housing 1120.

[0030] like Figure 4 As shown, the rear end face of the rear housing 1120 forms a stepped hole 1122 through which the shaft core 1200 passes.

[0031] The shaft core 1200 passes through the outer shell 1100 in the front-to-back direction via the stepped hole 1122, the cavity, and the through hole of the front end cover 1110.

[0032] like Figure 5 and Figure 6 As shown, the rear end of the shaft core 1200 forms a concentric disc-shaped portion 1210, which is located in the stepped hole 1122. Its rear end face has an axial pin hole 1211 and four positioning grooves 1212. The pin hole 1211 is concentric with the disc-shaped portion 1210, and the four positioning grooves 1212 are arranged in a cross shape with the pin hole 1211 as the center.

[0033] like Figure 5 As shown, the portion of the shaft core 1200 located within the cavity forms an annular groove 1220, a first segment 1230, and a second segment 1240 from front to back, with the annular groove 1220 and the first segment 1230 being adjacent to each other.

[0034] like Figure 1 As shown, the manual component 1300 is connected to the front end of the shaft core 1200, which can be a handle or a knob.

[0035] like Figure 8 As shown, the magnetic component 1400 is composed of two magnetic steel sheets 1410.

[0036] like Figure 8 As shown, the magnetic component fixing structure (magnet fixing structure) 1500 is fixed to the rear end of the shaft core 1200 and is used to fix two magnet plates 1410. It includes a disk body 1510 and a magnetic field shielding ring 1520. See [link / reference] Figure 9-11 .

[0037] like Figure 9 As shown, the front end face of the disc body 1510 has a pin 1511 and two positioning protrusions 1512. The pin 1511 is inserted into the pin hole 1211, and the two positioning protrusions 1512 are symmetrically arranged along the pin 1511, as shown. Figure 6 The two positioning protrusions 1512 can be inserted into the left and right positioning grooves 1212 or into the upper and lower positioning grooves 1212, thereby positioning the magnet 1410 in two directions.

[0038] The disc body 1510 and the disc-shaped part 1210 are concentrically fixed by bolts.

[0039] like Figure 10 As shown, the rear end face of the disk body 1510 forms two axially extending protrusions 1513. The two protrusions 1513 are arranged symmetrically along an axisymmetric line L passing through the center of the disk body 1510. Each protrusion 1513 forms a first plane 1513a and a second plane 1513b perpendicularly connected to the first plane 1513a on its left and right sides relative to the other protrusion 1513. The first plane 1513a faces the other protrusion 1513 and is parallel to the axisymmetric line L. The second plane 1513b is located inside the first plane 1513a along the axisymmetric line L.

[0040] like Figure 11 As shown, the magnetic field shielding ring 1520 is fitted over the two protrusions 1513, and two opposing third planes 1521 are formed on its inner wall. The two third planes 1521 are symmetrically arranged and are parallel to the second plane 1513b. The first plane 1513a, the second plane 1513b, and the third plane 1521 on the same side together form a slot C, for a total of four slots C. The axial length of each slot C is at least equal to the width of the magnetic steel sheet 1410, and the lateral width is equal to the thickness of the magnetic steel sheet. The two slots C on the same side of the two protrusions 1513 are opposite each other, allowing the two ends of the magnetic steel sheet 1410 to be inserted. Thus, the two magnetic steel sheets 1410 are respectively engaged in the corresponding slots C. See [reference needed]. Figure 8 .

[0041] Among them, the disk body 1510 is an injection molded part, the magnetic field shielding ring 1520 can prevent the magnetic field signal from being interfered with and is made of steel, and the magnetic steel sheet 1410 is made of samarium cobalt magnetic material.

[0042] Based on the above-mentioned magnet fixing structure, the two ends of the magnet sheet can be precisely inserted into two opposite slots, which not only plays the role of stabilizing and fixing the magnet sheet, but also prevents the magnetic field signal from being interfered with by external signals under the action of the magnetic field shielding ring 1520.

[0043] like Figure 8 As shown, the limiting ring 1600 is concentrically fitted onto the first segment 1230. Both its inner ring and the radial cross-section of the first segment 1230 are hexagonal. This allows the first segment 1230 of the shaft core 1200 to drive the limiting ring 1600 to rotate. The retaining ring 1700 is embedded in the annular groove 1220 to provide a stop at the front of the limiting ring 1600. Of course, the radial cross-section of the first segment 1230 can also be designed as a non-circular shape other than hexagonal.

[0044] like Figure 3As shown, the circumferential surface of the limiting ring 1600 forms two symmetrical protrusions 1610. The upper protrusion 1610 is located between two inclined surfaces 1121 on the upper part of the inner wall of the cavity, and the lower protrusion 1610 is located between two inclined surfaces 1121 on the lower part of the inner wall of the cavity. Thus, the protrusions 1610 can be stopped by the inclined surfaces 1121 on both sides during the clockwise or counterclockwise rotation of the shaft core 1200, thereby limiting the rotation angle of the magnetic component 1400 to the target maximum angle, such as 54 degrees. There is a logical relationship between the magnetic induction intensity and the rotation angle. Within this 54-degree range, the magnetic induction intensity is relatively consistent. If the target maximum angle is too large or too small, it will result in the magnetic induction intensity being too large or too small, which is not conducive to signal transmission.

[0045] Of course, the number of protrusions 1610 can be only one, and correspondingly, the two inclined surfaces 1121 can be omitted.

[0046] Therefore, through the cooperation between the protrusion on the limiting ring and the symmetrical inclined surface of the inner wall of the outer shell cavity, when the shaft core drives the magnetic component to rotate clockwise or counterclockwise, the protrusion will be stopped by the inclined surface in the corresponding direction (for example, when rotating clockwise, the protrusion touches the right inclined surface; when rotating counterclockwise, it touches the left inclined surface), thus strictly limiting the rotation range of the magnetic component to the angle range between the two inclined surfaces (such as 0° to 54°). The position and angle of the inclined surfaces can be adjusted according to actual needs, flexibly adapting to the limitation requirements of the "maximum target angle" in different scenarios, significantly improving the adaptability of the manipulator to specific application scenarios.

[0047] like Figure 7 As shown, the elastic self-resetting member 1800 is axially pre-compressed between the rear end inner wall of the rear housing 1120 and the limiting ring 1600, and is passed through by the shaft core 1200. The washer 1900 is located between the rear end of the elastic self-resetting member 1800 and the rear end inner wall of the housing 1120. The washer 1900 is fitted on the second section 1240. The inner ring of the washer and the radial cross section of the second section 1240 are both waist-shaped, so that the washer 1900 can rotate with the shaft core 1200 and can slide axially back and forth.

[0048] Of course, the radial section of the second segment 1240 can also be designed as a non-circular shape other than a waist shape.

[0049] Based on the above structure, the shaft core 1200 is subjected to a forward pressing force from the elastic self-recovering member 1800 through the limiting ring 1600, thereby causing the disc-shaped portion 1210 of the shaft core 1200 to press against the step of the stepped hole 1122. At the same time, the washer 1900 is pressed against the rear inner wall of the housing 1120. Thus, during the rotation of the shaft core 1200, friction is generated between the disc-shaped portion 1210 and the stepped hole 1122, and between the washer 1900 and the rear inner wall of the housing 1120, thereby providing the user with a damping feel.

[0050] When wear occurs, under the pressure of the elastic self-recovering component 1800, the disc-shaped portion 1210 can always press against the step of the stepped hole 1122, and the washer 1900 can always press against the inner wall of the rear end of the housing 1120, thereby avoiding the deterioration of the damping feel and providing a good user experience.

[0051] To prevent the friction from decreasing and affecting the damping feel due to the increased radial clearance between the disc-shaped portion 1210 and the stepped hole 1122, such as... Figure 5 As shown, the peripheral surface of the disc-shaped portion 1210 has a first conical surface 1213 that contacts the front end surface of the disc-shaped portion 1210, such as... Figure 4 As shown, the wall of the stepped hole 1122 has a second conical surface 1122a that contacts the first conical surface 1213. When wear occurs between the disc-shaped portion 1210 and the stepped hole 1122, the disc-shaped portion 1210 moves forward and presses against the stepped hole 1122 under the action of the elastic self-recovery member 1800. At the same time, the first conical surface 1213 and the second conical surface can still remain in close contact.

[0052] Furthermore, the simultaneous provision of damping through the dual friction surfaces of the "disc-stepped surface" and the "washer-inner wall of the housing" disperses the wear load of a single friction surface. This dual friction surface design reduces the wear rate per unit area and extends the service life of the damping structure. Simultaneously, the superimposed frictional force output from the dual friction surfaces results in a smoother and more linear damping force (avoiding resistance fluctuations caused by uneven wear of a single friction plate), providing a more delicate and smooth feel when the user operates the handle.

[0053] Among them, the elastic self-recovering component 1800 adopts a wave spring. The two ends of the wave spring are in surface contact with the limiting ring 1600 and the washer 1900. Compared with ordinary springs with point contact or line contact, it can avoid the torsion that causes the shaft core 1200 to move axially and affect the damping feel.

[0054] The Hall effect sensor 1999 is used to sense changes in the magnetic field of the magnetic component 1400, such as... Figure 2 As shown, it includes a housing 1999a and a Hall sensor chip 1999b disposed inside the housing 1999a. The housing 1999a is fixed to the rear end of the disc-shaped part 1210 of the shaft core by bolts and covers the magnetic component fixing structure 1500, so that the Hall sensor chip 1999b is located exactly between the two magnetic steel sheets 1410.

[0055] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An accelerator operator magnet steel fixing structure characterized by, The application relates to a magnetic field shielding device, which comprises a disc body and a magnetic field shielding ring, wherein the disc body is fixed concentrically with the rear end of a shaft core, the rear end surface of the disc body forms two axially rearward extending protrusions, the two protrusions are arranged symmetrically along an axial symmetry straight line passing through the center of the disc body, each protrusion forms a first plane and a second plane connected perpendicularly to the first plane on the left and right sides of one surface of the other protrusion, the first plane faces the other protrusion, the second plane is located on the inner side of the first plane along the axial symmetry straight line, the magnetic field shielding ring is sleeved on the two protrusions, and opposite two third planes are formed on the inner wall of the magnetic field shielding ring, the two third planes are symmetrically arranged and parallel to the second planes, the first plane, the second plane and the third plane on the same side form a clamping groove, and there are four clamping grooves, the axial length of each clamping groove is equal to the width of a magnetic steel sheet, the left and right width of each clamping groove is equal to the thickness of the magnetic steel sheet, the two clamping grooves on the same side of the two protrusions are opposite, and the distance between the two clamping grooves is equal to the length of the magnetic steel sheet.

2. The magnet fixing structure of a throttle lever according to claim 1, wherein The rear end surface of the shaft core is provided with an axial pin hole and a positioning groove, and the front end surface of the disc body is provided with a pin column matched with the pin hole and a positioning protrusion matched with the positioning groove.

3. The magnet fixing structure of a throttle lever according to claim 2, wherein The pin hole is concentric with the rear end surface of the shaft core.

4. The magnet fixing structure of a throttle lever according to claim 3, wherein The number of the positioning grooves is four, and the four positioning grooves are arranged in a cross shape with the pin hole as the center.

5. The magnet fixing structure of a throttle lever according to claim 4, wherein The number of the positioning protrusions is two, and the two positioning protrusions are symmetrically arranged along the pin column.

6. The magnet fixing structure for a throttle lever according to claim 1, wherein The disc body is an injection molding part, and the magnetic field shielding ring is a steel ring.

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