Magnetic redundancy magnetic encoder with strong anti-interference capability

Abstract

The invention discloses a magnetic redundancy magnetic encoder with strong anti-interference capability. The magnetic redundancy magnetic encoder comprises a first shell and a second shell, a first space is defined by the first shell and the second shell; the first shell is provided with a protective cover in the first space; a second space is defined by the protective cover and the first shell; a piston plate is slidably arranged in the protective cover; the piston plate divides the second space into an upper cavity and a lower cavity; a rotating shaft rotationally penetrates through the middle of the first shell; a first transmission part is arranged on the outer wall of the rotating shaft; the first shell is provided with a plurality of second transmission parts used for being matched with the first transmission parts in the circumferential direction. The first shell is provided with a driving piece connected with the piston plate; the driving part is in transmission connection with the second transmission part to drive the piston plate to move up and down; therefore, the problem of heat accumulation caused by the sealing of the protective cover is solved, the magnetic attenuation of the magnetic steel ring caused by temperature rise is slowed down, and the measurement precision and reliability of the magnetic encoder in a high-temperature environment can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of encoders, and in particular to a magnetic redundancy magnetic encoder with strong anti-interference capability. Background Art

[0002] In the application of magnetic encoders, protective covers are often used to reduce external magnetic interference and protect internal sensitive components from the influence of the external environment. Especially in situations where high-precision measurements are required, protective covers can effectively block external electromagnetic interference and ensure the stability and reliability of measurement results.

[0003] However, as the enclosure of the protective cover increases, its heat dissipation effect is often limited. Since the magnetic steel ring and the Hall element are extremely sensitive to temperature changes, the increase in temperature inside the protective cover will directly affect the magnetism of the magnetic steel ring. The magnetic force of the magnetic steel ring may gradually decrease at high temperatures, causing the Hall element to be unable to accurately sense the magnetic field changes, ultimately resulting in a decrease in measurement accuracy. Especially in high-speed operation or high-power output environments, the increase in internal temperature may cause the performance of the magnetic steel ring to significantly decrease, thereby affecting the accuracy and stability of the entire encoder. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a magnetic redundant magnetic encoder with strong anti-interference ability, so as to achieve active heat dissipation effect, improve the heat exchange efficiency inside the protective cover, effectively reduce the internal temperature of the protective cover, and thus solve the problem of heat accumulation caused by the closure of the protective cover.

[0005] To achieve the above object, the specific scheme of the present invention is as follows: A magnetic redundant magnetic encoder with strong anti-interference ability comprises a first shell and a second shell; the first shell is arranged at the bottom of the second shell and is surrounded by the second shell to form a first space; the first shell is provided with a protective cover in the first space; the protective cover and the first shell are surrounded to form a second space; the protective cover is slidably provided with a piston plate in the second space; the piston plate divides the second space into an upper cavity and a lower cavity; A rotating shaft is rotatably provided in the middle of the first shell; a first transmission member is provided on the outer wall of the rotating shaft in the lower cavity; a plurality of second transmission members for cooperating with the first transmission member are circumferentially provided in the lower cavity of the first shell; a driving member connected to the piston plate is provided at a position corresponding to each second transmission member of the first shell; the driving member is in transmission connection with the second transmission member to drive the piston plate to move up and down.

[0006] Preferably, the driving member includes a fixed column, a transmission sleeve, a telescopic rod and a first spring; the lower end of the fixed column is fixedly connected to the first shell; the transmission sleeve is rotatably sleeved on the outer wall of the fixed column; the telescopic rod is slidably penetrated into the fixed column; the lower end of the transmission sleeve is transmission-connected to the second transmission member to drive the transmission sleeve to rotate through the second transmission member; the transmission sleeve is provided with a spiral groove; the lower end of the outer wall of the telescopic rod is provided with a driving pin; the driving pin movably penetrates the fixed column and then movably embeds into the spiral groove; the upper end of the telescopic rod is connected to the piston plate; the first spring is provided in the fixed column; the two ends of the first spring respectively abut against the lower end of the telescopic rod and the inner bottom wall of the fixed column.

[0007] Preferably, the fixing column is penetrated by a vertically extending strip hole; the driving pin movably penetrates the strip hole.

[0008] Preferably, the second transmission member comprises a transmission rack; the transmission rack is slidably arranged on the first housing; a gear structure is arranged at the lower end of the outer wall of the transmission sleeve; the gear structure is meshed with one end of the transmission rack; a second spring is arranged between the transmission rack and the first housing; When the first transmission member contacts the transmission rack, the first transmission member squeezes the transmission rack to slide away from the rotating shaft, the transmission rack synchronously drives the transmission sleeve to rotate through the gear structure, and the second spring is compressed.

[0009] Preferably, a profile column vertically extends inside the fixed column; the telescopic rod is provided with a profile hole; and the profile column slides into the profile hole.

[0010] Preferably, the telescopic rod is detachably connected to the piston plate.

[0011] Preferably, a first one-way valve is provided at the center of the piston plate; a second one-way valve is provided at the top center of the protective cover; and a third one-way valve is provided at a position of the first shell corresponding to the lower cavity.

[0012] Preferably, the transmission rack is L-shaped; the inner side wall of the longitudinal arm of the transmission rack is provided with a tooth structure meshing with the gear structure; and the outer side of the angular position of the transmission rack is provided with an inclined portion.

[0013] Preferably, the first transmission member comprises a support rod and a roller; one end of the support rod is fixedly connected to the rotating shaft; and the roller is axially connected to the other end of the support rod.

[0014] Preferably, the rotating shaft is provided with a lifting piece in the lower cavity; a magnetic steel ring is arranged on the lifting piece; the first shell is provided with a signal processing board in the lower cavity; the signal processing board is located above the magnetic steel ring; Hall elements are arranged on the bottom surface of the signal processing board at intervals along the circumferential direction; when the temperature of the lifting piece reaches a preset threshold, the magnetic steel ring moves toward the Hall element.

[0015] The beneficial effects of the present invention are as follows: by arranging the first transmission member, the second transmission member, the driving member and the piston plate in the protective cover, the present invention can continuously form an air circulation heat dissipation mechanism in the protective cover through the linkage cooperation among the first transmission member, the second transmission member, the driving member and the piston plate, thereby achieving active heat dissipation effect, improving the heat exchange efficiency inside the protective cover, and effectively reducing the internal temperature of the protective cover, thereby solving the problem of heat accumulation caused by the closure of the protective cover, slowing down the magnetic attenuation of the magnetic steel ring due to the increase in temperature, which is beneficial to improving the measurement accuracy and reliability of the magnetic encoder in a high temperature environment, and also enhancing the practicability of the protective cover, and having the dual advantages of shielding external magnetic interference and heat dissipation and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional schematic diagram of the present invention when the roller is not in contact with the transmission rack; Figure 3 It is a cross-sectional schematic diagram of the present invention when the roller squeezes the transmission rack; Figure 4 It is a partial structural schematic diagram of the present invention; Figure 5 is a schematic structural diagram of the second transmission member of the present invention; Figure 6 It is a structural schematic diagram of the driving member of the present invention; Figure 7 is a cross-sectional schematic diagram of a driving member of the present invention; Figure 8 is an exploded schematic diagram of the driving member of the present invention; Explanation of the reference numerals in the accompanying drawings: 1. first housing; 11. transmission rack; 111. tooth structure; 112. inclined portion; 113. slide; 12. second spring; 13. third one-way valve; 2. second housing; 3. protective cover; 31. second one-way valve; 4. piston plate; 41. first one-way valve; 5. rotating shaft; 51. support rod; 52. roller; 61. fixing column; 611. strip hole; 612. profile column; 62. transmission sleeve; 621. spiral groove; 622. gear structure; 63. telescopic rod; 631. driving pin; 632. profile hole; 64. first spring; 7. lifting member; 8. magnetic steel ring; 9. signal processing board; 91. Hall element. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0018] like Figures 1 to 8As shown, a magnetic redundant magnetic encoder with strong anti-interference ability described in this embodiment includes a first shell 1 and a second shell 2; the first shell 1 is arranged at the bottom of the second shell 2, and is surrounded by the second shell 2 to form a first space for the installation of parts; the first shell 1 is provided with a protective cover 3 in the first space, and the interference of the external magnetic field is effectively shielded by the protective cover 3; the protective cover 3 and the first shell 1 are surrounded to form a second space, so that the Hall element 91 and the magnetic steel ring 8 are installed in the second space, thereby effectively shielding the interference of the external magnetic field on the measurement of the Hall element 91; the protective cover 3 is slidably provided with a piston plate 4 in the second space; the piston plate 4 divides the second space into an upper cavity and a lower cavity; A rotating shaft 5 is rotatably penetrated in the middle of the first shell 1, and the rotating shaft 5 is rotatably connected to the first shell 1 through a bearing; a first transmission member is provided on the outer wall of the rotating shaft 5 in the lower cavity, and preferably, the first transmission member is extended radially along the rotating shaft 5; the first shell 1 is circumferentially provided with a plurality of second transmission members for cooperating with the first transmission member in the lower cavity, and the number of the second transmission members is set according to actual design requirements, such as setting three, and the three second transmission members are evenly distributed along the circumferential direction; a driving member connected to the piston plate 4 is provided at the position corresponding to each second transmission member of the first shell 1; the driving member is transmission-connected to the second transmission member to drive the piston plate 4 to move up and down.

[0019] Specifically, when the magnetic redundant magnetic encoder described in this embodiment is actually used, the rotating shaft 5 is rotated to drive each first transmission member to rotate. When the first transmission member cooperates with the second transmission member, the power is transmitted to the driving member through the transmission of the second transmission member, so that the driving member drives the piston plate 4 to move downward, so that the volume of the upper cavity increases and the volume of the lower cavity decreases. At this time, the hot air in the lower cavity enters the upper cavity, such as Figure 3 As shown; When the first transmission member is disengaged from the second transmission member, the second transmission member cooperates with the driving member to drive the piston plate 4 to move upward, so that the volume of the upper cavity decreases and the volume of the lower cavity increases. Figure 2 As shown, at this time, the cold air from the outside enters the lower cavity to cool the protective cover 3, while the hot air from the upper cavity is discharged to the outside, thereby realizing the flow of air in the protective cover 3 and achieving the heat dissipation effect; In this way, when the rotating shaft 5 continuously drives the first transmission member to rotate, the piston plate 4 is driven by the driving member to continuously move up and down, thereby continuously generating a heat dissipating airflow in the protective cover 3 .

[0020] In this embodiment, by arranging the first transmission member, the second transmission member, the driving member and the piston plate 4 in the protective cover 3, an air circulation heat dissipation mechanism can be continuously formed in the protective cover 3 through the linkage cooperation among the first transmission member, the second transmission member, the driving member and the piston plate 4, so as to achieve active heat dissipation effect, improve the heat exchange efficiency inside the protective cover 3, and effectively reduce the internal temperature of the protective cover 3, thereby solving the heat accumulation problem caused by the closure of the protective cover 3, slowing down the magnetic attenuation of the magnetic steel ring 8 due to the increase in temperature, which is beneficial to improving the measurement accuracy and reliability of the magnetic encoder in a high temperature environment, and also enhancing the practicability of the protective cover 3, and having the dual advantages of shielding external magnetic interference and heat dissipation and cooling.

[0021] like Figures 2 to 4 , Figures 6 to 8 As shown, the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the driving member includes a fixed column 61, a transmission sleeve 62, a telescopic rod 63 and a first spring 64; the lower end of the fixed column 61 is fixedly connected to the first shell 1; the transmission sleeve 62 is rotatably sleeved on the outer wall of the fixed column 61; the telescopic rod 63 is slidably penetrated in the fixed column 61; the lower end of the transmission sleeve 62 is transmission-connected with the second transmission member to drive the transmission sleeve 62 to rotate through the second transmission member; the transmission sleeve 62 is provided with a spiral groove 621; the lower end of the outer wall of the telescopic rod 63 is provided with a driving pin 631; the driving pin 631 movably penetrates the fixed column 61 and then movably embeds into the spiral groove 621; the upper end of the telescopic rod 63 is connected to the piston plate 4; the first spring 64 is arranged in the fixed column 61; the two ends of the first spring 64 are respectively abutted against the lower end of the telescopic rod 63 and the inner bottom wall of the fixed column 61.

[0022] Specifically, when the first transmission member cooperates with the second transmission member, the second transmission member drives the transmission sleeve 62 to rotate, and the rotating sleeve cooperates with the driving pin 631 through the spiral groove 621, and synchronously drives the telescopic rod 63 to retract downward relative to the fixed column 61 during the rotation process, so that the telescopic rod 63 drives the piston plate 4 to move downward, and the first spring 64 is compressed, so that the hot air in the lower cavity enters the upper cavity, as shown in FIG. Figure 3 As shown; When the first transmission member and the second transmission member are disengaged, the first spring 64 pushes the telescopic rod 63 to extend outward, and the telescopic rod 63 drives the piston plate 4 to move upward. Figure 2 As shown, the external cold air enters the lower cavity to cool the protective cover 3, and the telescopic rod 63 cooperates with the driving pin 631 through the spiral groove 621 to synchronously make the transmission sleeve 62 rotate in the opposite direction, and the transmission sleeve 62 resets the second transmission member so as to cooperate with the first transmission member in the next transmission; this reciprocating movement causes the piston plate 4 to reciprocate up and down to continuously form an air circulation heat dissipation airflow in the protective cover 3, take away the heat in the protective cover 3, and effectively slow down the magnetic attenuation of the magnetic steel ring 8 due to the increase in temperature.

[0023] like Figures 6 to 8 As shown, in the magnetic redundant magnetic encoder described in this embodiment, in some implementations, the fixed column 61 is penetrated by a vertically extending bar hole 611; the driving pin 631 movably penetrates the bar hole 611; in this embodiment, by setting the bar hole 611, an avoidance space is provided for the up and down movement of the driving pin 631, and at the same time, a guide and limit are provided for the driving pin 631, and through the cooperation between the driving pin 631 and the bar hole 611, the rotational freedom of the telescopic rod 63 can also be limited.

[0024] like Figures 2 to 5 As shown, the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the second transmission member includes a transmission rack 11; the transmission rack 11 is slidably arranged on the first shell 1; the lower end of the outer wall of the transmission sleeve 62 is provided with a gear structure 622; the gear structure 622 is meshed with one end of the transmission rack 11; a second spring 12 is provided between the transmission rack 11 and the first shell 1; when the first transmission member contacts the transmission rack 11, the first transmission member squeezes the transmission rack 11 to slide away from the rotating shaft 5, and the transmission rack 11 synchronously drives the transmission sleeve 62 to rotate through the gear structure 622, and the second spring 12 is compressed.

[0025] Specifically, the first housing 1 is provided with a slide groove, a slide table 113 is protruding from the bottom of the transmission rack 11, the slide table 113 is slidably connected in the slide groove, the second spring 12 is provided in the slide groove, and the two ends of the second spring 12 are respectively in contact with the slide table 113 and the end of the slide groove away from the rotating shaft 5; in this way, when the first transmission member contacts the transmission rack 11, as Figure 3 As shown, the first transmission member squeezes the transmission rack 11 to slide away from the rotating shaft 5, thereby driving the transmission sleeve 62 to rotate through the gear structure 622. During the rotation of the transmission sleeve 62, the spiral groove 621 cooperates with the driving pin 631, so that the telescopic rod 63 overcomes the elastic force of the first spring 64 and moves downward. The telescopic rod 63 drives the piston plate 4 to move downward, so that the hot air in the lower cavity enters the upper cavity, and at the same time the slide 113 squeezes the second spring 12; After the first transmission member is out of contact with the transmission rack 11, Figure 2 As shown, the first spring 64 and the second spring 12 restore elastic deformation, thereby pushing the transmission rack 11 to reset so as to contact and transmit with the first transmission member in the next cycle, and at the same time, the transmission sleeve 62 is driven to rotate in the opposite direction through the gear structure 622. At the same time, under the elastic force of the first spring 64, the telescopic rod 63 extends outward from the fixed column 61, thereby driving the piston plate 4 to move upward, and driving the rotating sleeve to rotate in the opposite direction through the cooperation of the driving pin 631 and the spiral groove 621, so that the external cold air enters the lower cavity to cool the protective cover 3.

[0026] like Figure 7 and Figure 8 As shown, in the magnetic redundant magnetic encoder described in this embodiment, in some implementations, a profile column 612 extends vertically inside the fixed column 61; the telescopic rod 63 is provided with a profile hole 632; the profile column 612 slides into the profile hole 632; in this embodiment, the profile column 612 is arranged to cooperate with the profile hole 632, so as to provide guidance and limitation for the telescopic movement of the telescopic rod 63, and at the same time further limit the rotational freedom of the telescopic rod 63, so that the movement of the telescopic rod 63 is more stable.

[0027] In the magnetic redundant magnetic encoder described in this embodiment, in some implementations, the telescopic rod 63 is detachably connected to the piston plate 4; this arrangement facilitates assembly and disassembly of the telescopic rod 63 and the piston plate 4.

[0028] Exemplarily, the upper end of the telescopic rod 63 is mounted to the piston plate 4 via screws.

[0029] like Figures 1 to 3 As shown, in the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the center of the piston plate 4 is provided with a first one-way valve 41; the center of the top of the protective cover 3 is provided with a second one-way valve 31; and the first housing 1 is provided with a third one-way valve 13 at the position corresponding to the lower cavity. Preferably, the second one-way valve 31 is made of metal material, and has good compatibility with the metal material of the protective cover 3, and can achieve good electrical connection. In actual use, when the piston plate 4 moves downward, the volume of the upper cavity increases, the volume of the lower cavity decreases, the first one-way valve 41 opens, and the hot air in the lower cavity enters the upper cavity through the first one-way valve 41; when the piston plate 4 moves upward, the volume of the upper cavity decreases, the volume of the lower cavity increases, the second one-way valve 31 and the third one-way valve 13 open, and the external cold air enters the lower cavity through the third one-way valve 13, and the hot air in the upper cavity is discharged through the second one-way valve 31, thereby achieving heat dissipation inside the protective cover 3.

[0030] like Figure 5As shown, in the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the transmission rack 11 is L-shaped; the inner side wall of the longitudinal arm of the transmission rack 11 is provided with a tooth structure 111 meshing with the gear structure 622; the outer side of the angular position of the transmission rack 11 is provided with an inclined portion 112; specifically, when the first transmission member rotates to contact the inclined portion 112 of the transmission rack 11, the first transmission member generates a thrust on the transmission rack 11 through the inclined portion 112, so that the transmission rack 11 overcomes the elastic force of the second spring 12 and moves away from the rotating shaft 5, and at the same time, the tooth structure 111 and the gear structure 622 cooperate to drive the transmission sleeve 62 to rotate. During the rotation of the transmission sleeve 62, the spiral groove 621 cooperates with the drive pin 631, so that the telescopic rod 63 overcomes the elastic force of the first spring 64 and moves downward, and the telescopic rod 63 drives the piston plate 4 to move downward, so that the hot air in the lower cavity enters the upper cavity; After the first transmission member is out of contact with the transmission rack 11, the transmission rack 11 slides and resets toward the direction of the rotating shaft 5 under the elastic force of the second spring 12, thereby driving the transmission sleeve 62 to rotate in the opposite direction. In this way, the telescopic rod 63 extends outward from the fixed column 61 under the elastic force of the first spring 64, thereby driving the piston plate 4 to move upward. At the same time, the driving pin 631 cooperates with the spiral groove 621 to drive the transmission sleeve 62 to rotate in the opposite direction, thereby reducing the volume of the upper cavity and increasing the volume of the lower cavity, so that external cold air enters the lower cavity to cool the protective cover 3.

[0031] like Figures 2 to 4 As shown, the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the first transmission member includes a support rod 51 and a roller 52; one end of the support rod 51 is fixedly connected to the rotating shaft 5; the roller 52 is axially connected to the other end of the support rod 51; in this embodiment, the support rod 51 is arranged to facilitate the installation of the roller 52. When rotating, the roller 52 contacts the inclined portion 112 of the transmission rack 11, thereby reducing the wear of the transmission rack 11 and making the transmission between the rotating shaft 5 and the transmission rack 11 smoother.

[0032] like Figures 2 to 4 As shown, in the magnetic redundant magnetic encoder described in this embodiment, in some embodiments, the rotating shaft 5 is provided with a lifting piece 7 in the lower cavity; a magnetic steel ring 8 is arranged on the lifting piece 7; the first shell 1 is provided with a signal processing board 9 in the lower cavity; the signal processing board 9 is located above the magnetic steel ring 8; Hall elements 91 are arranged on the bottom surface of the signal processing board 9 at intervals along the circumferential direction; when the temperature of the lifting piece 7 reaches a preset threshold, the magnetic steel ring 8 moves toward the Hall element 91.

[0033] Specifically, in actual use, as the temperature inside the protective cover 3 increases, when the temperature of the lifting member 7 reaches a preset threshold, the lifting member 7 drives the magnetic ring 8 to move toward the Hall element 91, thereby shortening the distance between the magnetic ring 8 and the Hall element 91, and then compensating for the measurement error caused by the decrease in the magnetic force of the magnetic ring 8, so that the Hall element 91 can always accurately detect changes in the magnetic field, thereby improving the measurement accuracy and stability.

[0034] In the magnetic redundant magnetic encoder described in this embodiment, in some implementations, the lifting member 7 can be made of a thermal expansion material, such as a memory metal material. Specifically, when the temperature of the lifting member 7 reaches its expansion temperature, it expands, thereby driving the magnetic steel ring 8 to move toward the Hall element 91, reducing the distance between the magnetic steel ring 8 and the Hall element 91, compensating for the measurement error caused by the decrease in the magnetic force of the magnetic steel ring 8, so that the Hall element 91 can always accurately detect the change in the magnetic field, thereby improving the accuracy and stability of the measurement.

[0035] In the magnetic redundant magnetic encoder described in this embodiment, in some implementations, the lifting member 7 can also be a piezoelectric ceramic sheet; in this way, when the temperature reaches a certain level, the piezoelectric ceramic sheet adjusts the distance between the magnetic steel ring 8 and the Hall element 91 to compensate for the measurement error caused by the decrease in the magnetic force of the magnetic steel ring 8, so that the Hall element 91 can always accurately detect changes in the magnetic field, thereby improving the accuracy and stability of the measurement.

[0036] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A magnetic redundant magnetic encoder with strong anti-interference ability, characterized in that: It comprises a first shell and a second shell; the first shell is arranged at the bottom of the second shell and is surrounded by the second shell to form a first space; the first shell is provided with a protective cover in the first space; the protective cover and the first shell are surrounded to form a second space; the protective cover is slidably provided with a piston plate in the second space; the piston plate divides the second space into an upper cavity and a lower cavity; A rotating shaft is rotatably provided in the middle of the first shell; a first transmission member is provided on the outer wall of the rotating shaft in the lower cavity; a plurality of second transmission members for cooperating with the first transmission member are circumferentially provided in the lower cavity of the first shell; a driving member connected to the piston plate is provided at a position corresponding to each second transmission member of the first shell; the driving member is in transmission connection with the second transmission member to drive the piston plate to move up and down.

2. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, characterized in that: The driving member includes a fixed column, a transmission sleeve, a telescopic rod and a first spring; the lower end of the fixed column is fixedly connected to the first shell; the transmission sleeve is rotatably sleeved on the outer wall of the fixed column; the telescopic rod is slidably penetrated into the fixed column; the lower end of the transmission sleeve is transmission-connected to the second transmission member to drive the transmission sleeve to rotate through the second transmission member; the transmission sleeve is provided with a spiral groove; the lower end of the outer wall of the telescopic rod is provided with a driving pin; the driving pin movably penetrates the fixed column and then movably embeds into the spiral groove; the upper end of the telescopic rod is connected to the piston plate; the first spring is arranged in the fixed column; the two ends of the first spring are respectively abutted against the lower end of the telescopic rod and the inner bottom wall of the fixed column.

3. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 2, characterized in that: The fixing column is penetrated by a vertically extending strip hole; the driving pin movably penetrates the strip hole.

4. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 2, characterized in that: The second transmission member comprises a transmission rack; the transmission rack is slidably arranged on the first housing; a gear structure is arranged at the lower end of the outer wall of the transmission sleeve; the gear structure is meshed with one end of the transmission rack; a second spring is arranged between the transmission rack and the first housing; When the first transmission member contacts the transmission rack, the first transmission member squeezes the transmission rack to slide away from the rotating shaft, the transmission rack synchronously drives the transmission sleeve to rotate through the gear structure, and the second spring is compressed.

5. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 2, characterized in that: A profile column vertically extends inside the fixed column; the telescopic rod is provided with a profile hole; and the profile column slides into the profile hole.

6. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 2, characterized in that: The telescopic rod is detachably connected to the piston plate.

7. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 2, characterized in that: A first one-way valve is provided at the center of the piston plate; a second one-way valve is provided at the top center of the protective cover; and a third one-way valve is provided at a position of the first shell corresponding to the lower cavity.

8. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 4, characterized in that: The transmission rack is L-shaped; the inner side wall of the longitudinal arm of the transmission rack is provided with a tooth structure meshing with the gear structure; and an inclined portion is provided on the outer side of the angular position of the transmission rack.

9. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, characterized in that: The first transmission member comprises a support rod and a roller; one end of the support rod is fixedly connected to the rotating shaft; and the roller shaft is connected to the other end of the support rod.

10. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, characterized in that: The rotating shaft is provided with a lifting piece in the lower cavity; a magnetic steel ring is arranged on the lifting piece; the first shell is provided with a signal processing board in the lower cavity; the signal processing board is located above the magnetic steel ring; Hall elements are arranged at intervals along the circumferential direction on the bottom surface of the signal processing board; when the temperature of the lifting piece reaches a preset threshold, the magnetic steel ring moves toward the Hall element.

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