A magnetic redundant magnetic encoder with strong anti-interference ability

Abstract

The present invention discloses a magnetic redundant magnetic encoder with strong anti-interference ability, which includes a first housing and a second housing; a first space is formed by enclosing the first housing and the second housing; a protective cover is provided in the first space of the first housing; a second space is formed by enclosing the protective cover and the first housing; 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 is rotatably penetrated through the middle of the first housing; a first transmission member is arranged on the outer wall of the rotating shaft; a plurality of second transmission members for cooperating with the first transmission member are arranged along the circumference of the first housing; the first housing is provided with a driving member connected to the piston plate; the driving member is in transmission connection with the second transmission member to drive the piston plate to move up and down; realizing an active heat dissipation effect, thereby solving the problem of heat accumulation caused by the enclosure of the protective cover, slowing down the magnetic force attenuation of the magnetic steel ring due to the increase in temperature, and being beneficial to improving the measurement accuracy and reliability of the magnetic encoder in a high-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of encoders, and more specifically, to a magnetic redundant magnetic encoder with strong anti-interference ability. 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 external environment. Especially in applications with high-precision measurement requirements, the protective cover can effectively block external electromagnetic interference and ensure the stability and reliability of measurement results.

[0003] However, as the sealing performance of the protective cover increases, its heat dissipation effect is often limited. Since the magnetic steel ring and Hall elements 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, resulting in the Hall element being unable to accurately sense magnetic field changes, ultimately leading to a decrease in measurement accuracy. Especially in environments with high-speed operation or high-power output, the increase in internal temperature may cause a significant decline in the performance of the magnetic steel ring, 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 drawbacks and provide a magnetic redundant magnetic encoder with strong anti-interference ability, achieving an active heat dissipation effect, improving the heat exchange efficiency inside the protective cover, effectively reducing the temperature inside the protective cover, and thus solving the problem of heat accumulation caused by the enclosure of the protective cover.

[0005] To achieve the above purpose, the specific solution of the present invention is as follows:

[0006] A magnetic redundant magnetic encoder with strong anti-interference ability, comprising a first housing and a second housing; the first housing is disposed at the bottom of the second housing and encloses a first space with the second housing; the first housing is provided with a protective cover inside the first space; the protective cover and the first housing enclose a second space; a piston plate is slidably disposed inside the second space of the protective cover; the piston plate divides the second space into an upper cavity and a lower cavity;

[0007] A rotating shaft is rotatably passed through the middle of the first housing; a first transmission member is disposed on the outer wall of the rotating shaft inside the lower cavity; a plurality of second transmission members for cooperating with the first transmission member are disposed circumferentially inside the first housing in the lower cavity; a driving member connected to the piston plate is provided at the position of the first housing corresponding to each second transmission member; the driving member is in transmission connection with the second transmission member to drive the piston plate to move up and down.

[0008] Preferably, the driving member includes a fixing column, a transmission sleeve, a telescopic rod, and a first spring; the lower end of the fixing column is fixedly connected to the first housing; the transmission sleeve is rotatably sleeved on the outer wall of the fixing column; the telescopic rod is slidably inserted into the fixing column; the lower end of the transmission sleeve is drivingly connected to the second driving member to drive the transmission sleeve to rotate through the second driving member; the transmission sleeve is provided with a spiral groove; a driving pin is provided at the lower end of the outer wall of the telescopic rod; the driving pin movably penetrates through the fixing column and is movably embedded in the spiral groove; the upper end of the telescopic rod is connected to the piston plate; the first spring is arranged in the fixing column; both ends of the first spring respectively abut against the lower end of the telescopic rod and the inner bottom wall of the fixing column.

[0009] Preferably, the fixing column is provided with a vertically extending strip-shaped hole; the driving pin movably penetrates through the strip-shaped hole.

[0010] Preferably, the second driving member includes a transmission rack; the transmission rack is slidably arranged in the first housing; a gear structure is provided at the lower end of the outer wall of the transmission sleeve; the gear structure meshes with one end of the transmission rack; a second spring is arranged between the transmission rack and the first housing;

[0011] When the first driving member contacts the transmission rack, the first driving member squeezes the transmission rack to slide away from the rotating shaft, and the transmission rack synchronously drives the transmission sleeve to rotate through the gear structure, and the second spring is compressed.

[0012] Preferably, a profiled column extending vertically is arranged in the fixing column; the telescopic rod is provided with a profiled hole; the profiled column is slidably inserted into the profiled hole.

[0013] Preferably, the telescopic rod is detachably connected to the piston plate.

[0014] Preferably, a first one-way valve is provided at the center of the piston plate; a second one-way valve is provided at the center of the top of the protective cover; a third one-way valve is provided at the position of the first housing corresponding to the lower cavity.

[0015] Preferably, the transmission rack is L-shaped; a tooth structure meshing with the gear structure is provided on the inner side wall of the longitudinal arm of the transmission rack; an inclined portion is provided on the outer side at the angular position of the transmission rack.

[0016] Preferably, the first driving member includes a support rod and a roller; one end of the support rod is fixedly connected to the rotating shaft; the roller is pivotally connected to the other end of the support rod.

[0017] Preferably, a jacking member is arranged in the lower cavity of the rotating shaft; a magnetic steel ring is arranged on the jacking member; a signal processing board is arranged in the lower cavity of the first housing; the signal processing board is located above the magnetic steel ring; Hall elements are arranged at intervals along the circumference on the bottom surface of the signal processing board; when the temperature reaches a preset threshold, the jacking member moves the magnetic steel ring towards the Hall elements.

[0018] The beneficial effects of the present invention are as follows: By arranging a first transmission member, a second transmission member, a driving member and a piston plate inside the protective cover, through the linkage cooperation among the first transmission member, the second transmission member, the driving member and the piston plate, an air circulation heat dissipation mechanism can be continuously formed inside the protective cover, achieving an active heat dissipation effect, improving the heat exchange efficiency inside the protective cover, effectively reducing the temperature inside the protective cover, thus solving the problem of heat accumulation caused by the enclosure of the protective cover, slowing down the magnetic force attenuation of the magnetic steel ring due to temperature rise, being beneficial to improving the measurement accuracy and reliability of the magnetic encoder in a high-temperature environment, and also enhancing the practicality of the protective cover, having the dual advantages of shielding external magnetic interference and dissipating heat and cooling down. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the present invention;

[0020] Figure 2 is the sectional schematic diagram of the present invention when the roller is not in contact with the transmission rack;

[0021] Figure 3 is the sectional schematic diagram of the present invention when the roller presses the transmission rack;

[0022] Figure 4 is the partial structural schematic diagram of the present invention;

[0023] Figure 5 is the structural schematic diagram of the second transmission member of the present invention;

[0024] Figure 6 is the structural schematic diagram of the driving member of the present invention;

[0025] Figure 7 is the sectional schematic diagram of the driving member of the present invention;

[0026] Figure 8 is the exploded schematic diagram of the driving member of the present invention;

[0027] Description of the Reference Numerals: 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. Fixed column; 611. Strip-shaped hole; 612. Profiled column; 62. Transmission sleeve; 621. Spiral groove; 622. Gear structure; 63. Telescopic rod; 631. Driving pin; 632. Profiled hole; 64. First spring; 7. Lifting member; 8. Magnetic steel ring; 9. Signal processing board; 91. Hall element. Detailed Embodiments

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0029] As Figures 1 to 8 shown, a magnetic redundant magnetic encoder with strong anti-interference ability described in this embodiment includes a first housing 1 and a second housing 2; the first housing 1 is disposed at the bottom of the second housing 2 and forms a first space with the second housing 2 for the installation of components; the first housing 1 is provided with a protective cover 3 in the first space to effectively shield the interference of external magnetic fields through the protective cover 3; the protective cover 3 and the first housing 1 form a second space for the installation of a Hall element 91 and a magnetic steel ring 8 in the second space, thereby effectively shielding the interference of external magnetic fields on the measurement of the Hall element 91; a piston plate 4 is slidably disposed in the second space of the protective cover 3; the piston plate 4 divides the second space into an upper cavity and a lower cavity;

[0030] A rotating shaft 5 is rotatably penetrated through the middle of the first housing 1, and the rotating shaft 5 is rotatably connected to the first housing 1 through a bearing; a first transmission member is disposed on the outer wall of the rotating shaft 5 in the lower cavity, preferably, the first transmission member extends radially along the rotating shaft 5; a plurality of second transmission members for cooperating with the first transmission member are disposed circumferentially in the lower cavity of the first housing 1, and the number of the second transmission members is set according to actual design requirements, such as three, and the three second transmission members are evenly distributed circumferentially; a driving member connected to the piston plate 4 is disposed at the position of the first housing 1 corresponding to each second transmission member; the driving member is in transmission connection with the second transmission member to drive the piston plate 4 to move up and down.

[0031] Specifically, when the magnetic redundant magnetic encoder described in this embodiment is actually used, by rotating the rotating shaft 5, the rotating shaft 5 drives 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, increasing the volume of the upper cavity and decreasing the volume of the lower cavity. At this time, the hot air in the lower cavity enters the upper cavity, as Figure 3 shown;

[0032] 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, reducing the volume of the upper cavity and increasing the volume of the lower cavity, as Figure 2 shown. At this time, the outside cold air enters the lower cavity to cool the protective cover 3, and the hot air in the upper cavity is discharged to the outside, thereby realizing the flow of air in the protective cover 3 and achieving a heat dissipation effect;

[0033] 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 reciprocate up and down, thereby continuously generating a heat dissipation air flow in the protective cover 3.

[0034] In this embodiment, by arranging a first transmission member, a second transmission member, a driving member and a piston plate 4 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, an air circulation heat dissipation mechanism can be continuously formed in the protective cover 3, achieving an active heat dissipation effect, improving the heat exchange efficiency inside the protective cover 3, effectively reducing the temperature inside the protective cover 3, thereby solving the problem of heat accumulation caused by the enclosure of the protective cover 3, slowing down the magnetic force attenuation of the magnetic steel ring 8 due to temperature rise, being 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, having the dual advantages of shielding external magnetic interference and dissipating heat and cooling down.

[0035] As Figures 2 to 4 , Figures 6 to 8 shown, in some embodiments of the magnetic redundant magnetic encoder described in this embodiment, 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 housing 1; the transmission sleeve 62 is rotatably sleeved on the outer wall of the fixed column 61; the telescopic rod 63 is slidably inserted into the fixed column 61; the lower end of the transmission sleeve 62 is in transmission connection 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 through the fixed column 61 and then movably engages in 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; and the two ends of the first spring 64 respectively abut against the lower end of the telescopic rod 63 and the inner bottom wall of the fixed column 61.

[0036] Specifically, when the first transmission member cooperates with the second transmission member, the second transmission member drives the transmission sleeve 62 to rotate. 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, thereby enabling the hot air in the lower cavity to enter the upper cavity, as Figure 3 shown;

[0037] while when the first transmission member is disengaged from the second transmission member, 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, as Figure 2As shown in the figure, external cold air enters the lower cavity to cool down the protective cover 3. The telescopic rod 63 is engaged with the driving pin 631 through the spiral groove 621, synchronously reversing the rotation of the transmission sleeve 62. The transmission sleeve 62 resets the second transmission member to facilitate the next transmission cooperation with the first transmission member. In this way, the piston plate 4 reciprocates up and down continuously to form an air circulation cooling air flow in the protective cover 3, taking away the heat in the protective cover 3 and effectively reducing the magnetic force attenuation of the magnetic steel ring 8 due to temperature rise.

[0038] As Figures 6 to 8 shown, in some embodiments of the magnetic redundancy magnetic encoder described in this embodiment, a vertically extending strip-shaped hole 611 is provided through the fixed column 61; the driving pin 631 movably penetrates through the strip-shaped hole 611. By providing the strip-shaped hole 611 in this embodiment, a space for the up and down movement of the driving pin 631 is provided, and at the same time, guidance and limitation are provided for the driving pin 631. In addition, through the cooperation of the driving pin 631 and the strip-shaped hole 611, the rotational freedom of the telescopic rod 63 can also be restricted.

[0039] As Figures 2 to 5 shown, in some embodiments of the magnetic redundancy magnetic encoder described in this embodiment, the second transmission member includes a transmission rack 11; the transmission rack 11 is slidably arranged in the first housing 1; a gear structure 622 is provided at the lower end of the outer wall of the transmission sleeve 62; the gear structure 622 meshes with one end of the transmission rack 11; a second spring 12 is provided between the transmission rack 11 and the first housing 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. The transmission rack 11 synchronously drives the transmission sleeve 62 to rotate through the gear structure 622, and the second spring 12 is compressed.

[0040] Specifically, the first housing 1 is provided with a chute, a sliding table 113 protrudes from the bottom of the transmission rack 11, and the sliding table 113 is slidably connected in the chute. The second spring 12 is arranged in the chute, and the two ends of the second spring 12 respectively abut against the sliding table 113 and the end of the chute away from the rotating shaft 5. Thus, when the first transmission member contacts the transmission rack 11, as Figure 3 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, through the cooperation of the spiral groove 621 and the driving pin 631, the telescopic rod 63 moves downward against the elastic force of the first spring 64. 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. At the same time, the sliding table 113 squeezes the second spring 12;

[0041] After the first transmission member is separated from the transmission rack 11, as Figure 2As shown, the first spring 64 and the second spring 12 recover their elastic deformations, thereby pushing the transmission rack 11 to reset, so as to make contact transmission with the first transmission member in the next cycle. At the same time, the transmission sleeve 62 is driven to rotate reversely through the gear structure 622. Meanwhile, under the elastic force of the first spring 64, the telescopic rod 63 extends out of the fixed column 61, thereby driving the piston plate 4 to move upward, and driving the rotating sleeve to rotate reversely through the cooperation of the driving pin 631 and the spiral groove 621. In this way, the outside cold air enters the lower cavity to cool the protective cover 3.

[0042] As Figure 7 and Figure 8 As shown, in some embodiments of the magnetic redundancy magnetic encoder described in this embodiment, a profiled column 612 extends vertically inside the fixed column 61; the telescopic rod 63 is provided with a profiled hole 632; the profiled column 612 slides through the profiled hole 632; in this embodiment, by setting the cooperation of the profiled column 612 and the profiled hole 632, the telescopic movement of the telescopic rod 63 is guided and limited, and at the same time, the rotational freedom of the telescopic rod 63 is further restricted, making the movement of the telescopic rod 63 more stable.

[0043] In some embodiments of the magnetic redundancy magnetic encoder described in this embodiment, the telescopic rod 63 is detachably connected to the piston plate 4; this is set to facilitate the disassembly and assembly between the telescopic rod 63 and the piston plate 4.

[0044] Exemplarily, the upper end of the telescopic rod 63 is installed on the piston plate 4 by screws.

[0045] As Figures 1 to 3 As shown, in some embodiments of the magnetic redundancy magnetic encoder described in this embodiment, a first one-way valve 41 is provided at the center of the piston plate 4; a second one-way valve 31 is provided at the center of the top of the protective cover 3; a third one-way valve 13 is provided at the position of the first housing 1 corresponding to the lower cavity. Preferably, the second one-way valve 31 is made of a 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, the outside cold air enters the lower cavity through the third one-way valve 13, and at the same time, the hot air in the upper cavity is discharged through the second one-way valve 31, so as to realize the heat dissipation inside the protective cover 3.

[0046] As Figure 5As shown, in some embodiments of the magnetic redundant magnetic encoder described in this embodiment, the transmission rack 11 is L-shaped; a tooth structure 111 meshing with the gear structure 622 is provided on the inner side wall of the longitudinal arm of the transmission rack 11; an inclined portion 112 is provided on the outer side of the angular position of the transmission rack 11; 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, causing the transmission rack 11 to move away from the rotating shaft 5 against the elastic force of the second spring 12. At the same time, by utilizing the cooperation between the tooth structure 111 and the gear structure 622, the transmission sleeve 62 is driven to rotate. During the rotation of the transmission sleeve 62, through the cooperation between the spiral groove 621 and the driving pin 631, the telescopic rod 63 moves downward against the elastic force of the first spring 64. 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.

[0047] After the first transmission member is disengaged from the transmission rack 11, the transmission rack 11 slides and resets in 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 reverse direction. In this way, under the elastic force of the first spring 64, the telescopic rod 63 extends out of the fixed column 61, thereby driving the piston plate 4 to move upward. At the same time, through the cooperation between the driving pin 631 and the spiral groove 621, the transmission sleeve 62 is driven to rotate in the reverse direction. In this way, the volume of the upper cavity decreases, and the volume of the lower cavity increases, so that the outside cold air enters the lower cavity to cool the protective cover 3.

[0048] As Figures 2 to 4 shown, in some embodiments of the magnetic redundant magnetic encoder described in this embodiment, 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 pivotally connected to the other end of the support rod 51. In this embodiment, the support rod 51 is provided to facilitate the installation of the roller 52. During rotation, 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.

[0049] As Figures 2 to 4 shown, in some embodiments of the magnetic redundant magnetic encoder described in this embodiment, a lifting member 7 is provided in the lower cavity of the rotating shaft 5; a magnetic steel ring 8 is provided on the lifting member 7; a signal processing board 9 is provided in the lower cavity of the first housing 1; the signal processing board 9 is located above the magnetic steel ring 8; Hall elements 91 are provided at intervals along the circumference on the bottom surface of the signal processing board 9; when the temperature reaches a preset threshold, the lifting member 7 moves the magnetic steel ring 8 towards the Hall elements 91.

[0050] Specifically, during actual use, as the temperature inside the protective cover 3 rises, when the temperature of the lifting member 7 reaches the preset threshold, the lifting member 7 drives the magnetic steel ring 8 to move towards the Hall element 91, thereby shortening the distance between the magnetic steel ring 8 and the Hall element 91, and further compensating for the measurement error caused by the decrease in the magnetic force of the magnetic steel ring 8, enabling the Hall element 91 to always accurately detect magnetic field changes and improving the accuracy and stability of the measurement.

[0051] In some embodiments, the lifting member 7 of the magnetic redundancy magnetic encoder described in this embodiment can be made of a thermally expandable material, such as a shape 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 towards the Hall element 91, reducing the distance between the magnetic steel ring 8 and the Hall element 91, and compensating for the measurement error caused by the decrease in the magnetic force of the magnetic steel ring 8, enabling the Hall element 91 to always accurately detect magnetic field changes and improving the accuracy and stability of the measurement.

[0052] In some embodiments, the lifting member 7 of the magnetic redundancy magnetic encoder described in this embodiment can also be a piezoelectric ceramic sheet; thus, 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, enabling the Hall element 91 to always accurately detect magnetic field changes and improving the accuracy and stability of the measurement.

[0053] The above are only the preferred embodiments of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention patent application are included in the protection scope of the present invention patent application.

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; 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.

2. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, characterized in that: The fixing column is penetrated by a vertically extending strip hole; the driving pin movably penetrates the strip hole.

3. A magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, 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.

4. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1 is 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.

5. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, characterized in that: The telescopic rod is detachably connected to the piston plate.

6. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 1, 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.

7. The magnetic redundant magnetic encoder with strong anti-interference ability according to claim 3, 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.

8. 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.

9. 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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