Electromagnetic induction type gear shifting structure capable of preventing scrap iron interference

Abstract

The utility model provides an electromagnetic induction type gear shifting structure capable of preventing scrap iron interference, which is used for solving the problems that in the existing electromagnetic induction type gear shifting structure, lubricating oil can splash in a transmission shell, scrap iron mingled in the oil affects magnetic field distribution around a gear sensor, the induction precision of the gear sensor is reduced, data drifts and the like. Therefore, the technical problem is solved. The oil baffle cover has a certain height, and the space formed by the oil baffle cover and the shell of the transmission is a first cavity. And the first cavity relatively isolates the magnet from part of lubricating oil in the first cavity, so that most of oil is prevented from splashing into the first cavity. The oil blocking cover and the upper cover form a second cavity, and part of oil and scrap iron can be splashed into the second cavity through an opening in the upper end of the oil blocking cover. The magnet is higher than and protrudes out of the oil blocking cover, it can be ensured that oil liquid and scrap iron entering the second cavity cannot reach the range where the magnet can attract the oil liquid, and therefore the scrap iron is prevented from being attracted to the magnet.

Description

Technical Field

[0001] The utility model relates to a transmission shifting structure, in particular to an electromagnetic induction shifting structure capable of preventing iron filings from interfering. Background Art

[0002] The shifting process of automatic transmission and electric drive products with shifting function is controlled by TCU. Such products have high requirements for gear recognition. The existing gear recognition structures are mainly mechanical transmission type and electromagnetic induction type.

[0003] The mechanical transmission type is to connect the shift fork with the gear sensor through a transmission rod and other structures, convert the reciprocating motion of the shift fork into the rotation of the transmission rod, and then transmit it to the gear sensor. The gear sensor converts the angle signal into an electrical signal and transmits it to the TCU. This transmission mechanism has the advantages of low cost and oil resistance, but because the mechanical transmission solution needs to convert the reciprocating motion of the shift fork into the rotation of the transmission rod, there are many moving parts and the transmission route is long. The system has problems such as mechanical wear, slow response speed, and low accuracy.

[0004] At present, electromagnetic induction shifting structure is more and more widely used. The electromagnetic induction shifting structure is to set a magnet on the shift fork, which drives the magnet to reciprocate, causing the magnetic field around the gear position sensor to change. The gear position sensor converts the changing magnetic field into an electrical signal and transmits it to the TCU. This structure has the advantages of no mechanical wear, high induction accuracy, and fast frequency response.

[0005] However, in actual applications, as the transmission runs, the lubricating oil will splash inside the transmission housing, and impurities such as iron filings will be mixed in the lubricating oil. Since there is a magnetic field around the magnet, if the iron filings splash near the magnet along with the lubricating oil, the iron filings will be adsorbed to the surface of the magnet, affecting the magnetic field distribution around the gear position sensor, causing problems such as reduced gear position sensor sensing accuracy and data drift, which in turn leads to faults such as failure to shift gears.

[0006] Therefore, preventing oil from splashing around the magnet is a technical problem that needs to be solved urgently in the application of electromagnetic induction shifting structure. Utility Model Content

[0007] The purpose of the utility model is to solve the technical problem that in the existing electromagnetic induction shift structure, lubricating oil will splash inside the transmission housing, iron filings mixed in the oil will affect the magnetic field distribution around the gear sensor, causing the gear sensor sensing accuracy to decrease, data drift and other problems, which in turn leads to the inability to shift gears. An electromagnetic induction shift structure that is anti-iron filings interference is proposed.

[0008] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0009] An electromagnetic induction shifting structure for preventing iron chips from interfering is special in that it comprises a shift fork assembly, a stop cover assembly, a magnet assembly and a gear position sensor arranged on a transmission housing;

[0010] The transmission housing is provided with a stepped first mounting groove and a second mounting groove, wherein the first mounting groove is located above the second mounting groove; and the transmission housing is further provided with an axial hole located below the second mounting groove;

[0011] The shift fork assembly comprises a shift fork and a shift fork shaft, wherein the shift fork is fixedly sleeved on the shift fork shaft, one end of the shift fork shaft is connected to the shaft hole, and the shift fork shaft can move axially relative to the transmission housing;

[0012] The magnet assembly includes a bracket and a magnet assembly, the bottom of the bracket is fixedly connected to the shift fork, the upper end of the bracket passes through the second mounting slot and the first mounting slot in sequence, and the bracket and the second mounting slot are clearance-matched, and the magnet assembly is installed on the upper end of the bracket; a magnet is provided on the magnet assembly;

[0013] The baffle cover assembly comprises an oil baffle cover and an upper cover, the upper surface and the lower surface of the oil baffle cover are both open; the lower end of the oil baffle cover is sealed and installed in the first installation groove, the upper end of the bracket passes through the inside of the oil baffle cover, and the magnet assembly protrudes from the oil baffle cover; the side of the oil baffle cover is also provided with an oil return groove; the lower end of the upper cover is open and the upper end is closed; the upper cover is sleeved on the outside of the oil baffle cover and fixedly installed on the transmission housing, the first cavity is formed between the oil baffle cover and the transmission housing to block the lubricating oil splashed inside the transmission, and a second cavity is formed between the upper cover and the oil baffle cover;

[0014] The gear position sensor is fixedly mounted on a side outer wall of the upper cover, and the magnet on the magnet assembly is located in the second cavity and faces the gear position sensor.

[0015] Furthermore, an avoidance groove is provided on the transmission housing, and the avoidance groove plays an avoidance role when the bracket moves with the shift fork in the second mounting groove; the avoidance groove is located below the first mounting groove and above the second mounting groove, and the width of the avoidance groove is smaller than the width of the first mounting groove and larger than the width of the second mounting groove.

[0016] Furthermore, the oil shield is narrow at the top and wide at the bottom, and the outer ring of the lower end of the oil shield is provided with a first mounting surface adapted to the mounting surface of the first mounting groove, and the first mounting surface is installed in the first mounting groove; the oil return groove is opened along the lower edge of the oil shield.

[0017] Furthermore, the transmission housing and the upper cover are connected by upper cover fixing bolts, the transmission housing is provided with a first bonding surface on the outer circle of the first mounting groove, and housing mounting holes are respectively provided at the four top corners of the first bonding surface, the lower edge of the upper cover is provided with a second bonding surface matching the first bonding surface, and the second bonding surface is provided with upper cover through holes corresponding to the housing mounting holes; the upper cover fixing bolts pass through the upper cover through holes and are installed in the housing mounting holes.

[0018] Furthermore, the magnet assembly is connected to the bracket by fixing screws; the side of the bracket that is in contact with the magnet assembly is the bracket mounting surface, and the bracket mounting surface is provided with a screw mounting hole and a positioning pin hole, and the positioning pin hole is located above the screw mounting hole;

[0019] The magnet assembly is provided with a screw through hole and a positioning pin, the positioning pin is located on one side of the magnet assembly and is arranged opposite to the positioning pin hole, the fixing screw passes through the screw through hole and is installed in the screw installation hole, and the positioning pin is located in the positioning pin hole;

[0020] The magnet is located on the other side of the magnet assembly.

[0021] Furthermore, the bracket is connected to the shift fork via a bracket fixing bolt, a bracket through hole is provided at the bottom of the bracket, and the bracket fixing bolt passes through the bracket through hole to be fixedly connected to the shift fork.

[0022] Furthermore, fixing bosses are provided on the inner walls of two opposite side surfaces of the upper cover, and the bottom of the fixing bosses abuts against the upper end of the oil shield.

[0023] Furthermore, the upper cover and the gear position sensor are connected by a sensor fixing bolt; the upper cover includes a second mounting surface, the second mounting surface is located between two side surfaces where the fixing boss is set, and two sensor mounting holes are set on the second mounting surface; the sensor fixing bolt passes through the gear position sensor and is installed in the sensor mounting hole.

[0024] Furthermore, a shift fork pin hole is provided on the shift fork shaft, and a shift fork pin column installed in the shift fork pin hole is provided on the shift fork.

[0025] Beneficial effects of the utility model:

[0026] 1. The utility model is provided with a baffle cover assembly. The baffle cover assembly includes an oil baffle cover and an upper cover. The oil baffle cover has a certain height, and the space formed with the housing of the transmission is a first cavity. The first cavity relatively isolates the magnet from the internal lubricating oil to prevent most of the oil from splashing into the first cavity. The first cavity can also buffer the oil and iron filings splashed into the first cavity through the second mounting groove. The oil and iron filings splashed into the first cavity can flow back to the inside of the transmission along the inner wall of the oil baffle cover.

[0027] 2. The second cavity of the utility model is composed of an oil shield and an upper cover. The upper surface of the oil shield is opened. Inevitably, some oil and iron filings will splash into the second cavity through the upper opening of the oil shield. The magnet is higher than and protrudes from the oil shield, which can ensure that the oil and iron filings entering the second cavity cannot reach the range that the magnet can absorb, thereby preventing the iron filings from being absorbed by the magnet.

[0028] 3. The oil shield of the utility model is provided with an oil return groove at the bottom for oil return. Part of the oil and iron filings entering the second cavity will flow downward along the outer wall of the oil shield or the inner wall of the upper cover, and can flow back to the transmission through the oil return groove at the bottom of the oil shield.

[0029] 4. The oil shield assembly of the utility model is firm and reliable. The upper cover is fixedly connected to the transmission housing by bolts. A fixing boss is arranged inside the upper cover. The bottom of the fixing boss contacts the top of the oil shield and presses the oil shield to fix the oil shield.

[0030] 5. The utility model sets a second mounting groove structure on the housing to facilitate demoulding and machining. After the parts inside the transmission are assembled, the bracket can be passed through the second mounting groove with clearance fit to be fixedly connected with the shift fork, and finally the upper cover is assembled. The overall structure is easy to process and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of an embodiment of an electromagnetic induction type shifting structure for preventing iron chips interference of the utility model;

[0032] Figure 2 It is a structural schematic diagram of a shift fork shaft in an embodiment of an electromagnetic induction type shift structure for preventing iron chip interference of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a transmission housing in an embodiment of an electromagnetic induction type shifting structure for preventing iron chip interference of the utility model;

[0034] Figure 4 It is a structural schematic diagram of a bracket in an embodiment of an electromagnetic induction type shifting structure for preventing iron chips interference of the utility model;

[0035] Figure 5 It is a structural schematic diagram of a magnet assembly in an embodiment of an electromagnetic induction type shifting structure for preventing iron chips interference of the utility model;

[0036] Figure 6 It is a structural schematic diagram of an oil shield in an embodiment of an electromagnetic induction type shifting structure for preventing iron chips interference of the utility model;

[0037] Figure 7 The utility model is a schematic structural diagram of an upper cover in an embodiment of an electromagnetic induction type shifting structure for preventing iron chip interference.

[0038] 1-transmission housing, 11-first mounting groove, 12-avoidance groove, 13-second mounting groove, 14-first joint surface, 15-housing mounting hole; 2-shift fork; 3-shift fork shaft, 31-shift fork pin hole; 4-bracket, 41-bracket through hole, 42-bracket mounting surface, 43-screw mounting hole, 44-locating pin hole, 45-bracket fixing bolt; 5-magnet assembly, 51-locating pin, 52-screw through hole, 53-fixing screw, 54-magnet; 6-oil shield, 61-first mounting surface, 62-oil return groove; 7-upper cover, 71-second joint surface, 72-upper cover through hole, 73-upper cover fixing bolt, 74-second mounting surface, 75-sensor mounting hole, 76-fixing boss; 8-gear position sensor, 81-sensor fixing bolt. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0040] like Figure 1-Figure 7 As shown, the utility model proposes an electromagnetic induction shifting structure that is resistant to iron chip interference, including a shift fork assembly arranged on a transmission housing 1, a baffle cover assembly, a magnet assembly installed inside the baffle cover assembly, and a gear position sensor 8 installed outside the baffle cover assembly.

[0041] like Figure 1 , Figure 2 As shown, the shift fork assembly includes a shift fork 2 and a shift fork shaft 3 that are fixedly connected. The transmission housing 1 is provided with a shaft hole that is clearance-matched with the shift fork shaft 3. One end of the shift fork shaft 3 is installed in the shaft hole, and the shift fork shaft 3 can move axially relative to the transmission housing 1. The shift fork shaft 3 is also provided with a shift fork pin hole 31, and the shift fork 2 is provided with a corresponding shift fork pin column. The shift fork 2 and the shift fork shaft 3 are fixedly connected by the shift fork pin column cooperating with the shift fork pin hole 31, and the shift fork shaft 3 can drive the shift fork 2 to move axially.

[0042] like Figure 3 As shown, the transmission housing 1 is provided with a stepped first mounting groove 11, a second mounting groove 13 and an avoidance groove 12, the outer ring of the first mounting groove 11 is provided with a first joint surface 14, and the four vertex corners of the first joint surface 14 are respectively provided with housing mounting holes 15. The width of the first mounting groove 11 is greater than the width of the avoidance groove 12, the width of the avoidance groove 12 is greater than the width of the second mounting groove 13, and the first mounting groove 11 is located above the avoidance groove 12, and the avoidance groove 12 is located above the second mounting groove 13. The length direction of the second mounting groove 13 is parallel to the axial direction of the fork shaft 3, and the shaft hole is located below the second mounting groove 13.

[0043] like Figure 1 , Figure 4 , Figure 5As shown, the magnet assembly includes a bracket 4 and a magnet assembly 5. The magnet assembly 5 fits one side of the bracket 4 and is fixedly mounted on the upper part of the bracket 4. The bracket 4 passes through the second mounting groove 13, the avoidance groove 12 and the first mounting groove 11 in sequence. The bracket 4 and the second mounting groove 13 are clearance-matched. The avoidance groove 12 is used to avoid the movement of the bracket 4 in the second mounting groove 13. The bottom of the bracket 4 abuts against the fork 2. A bracket through hole 41 is provided on one side of the bottom of the bracket 4. A bracket fixing bolt 45 is used to pass through the bracket through hole 41 to fix the bracket 4 on the fork 2. The fork 2 can drive the bracket 4 and the magnet assembly 5 to move. The side where the bracket 4 fits the magnet assembly 5 is a bracket mounting surface 42. The bracket mounting surface 42 is provided with a screw mounting hole 43 and a positioning pin hole 44. The positioning pin hole 44 is located above the screw mounting hole 43.

[0044] The side of the magnet assembly 5 that fits the bracket 4 is provided with a positioning pin 51 that matches the positioning pin hole 44, and a screw through hole 52 that corresponds to the screw installation hole 43. The fixing screw 53 is passed through the screw through hole 52 and installed in the screw installation hole 43, and the positioning pin 51 and the positioning pin hole 44 are loosely matched, so that the magnet assembly 5 is fixedly installed against the bracket 4. The magnet assembly 5 is also provided with a magnet 54, and the side where the magnet 54 is located is opposite to the side where the positioning pin 51 is located.

[0045] like Figure 1 , Figure 6 , Figure 7 As shown, the baffle cover assembly includes an oil baffle cover 6 and an upper cover 7. The oil baffle cover 6 is wide at the bottom and narrow at the top, and both the upper surface and the lower surface of the oil baffle cover 6 are open. A first mounting surface 61 perpendicular to the lower surface is provided below the oil baffle cover 6, and the first mounting surface 61 of the oil baffle cover 6 is installed in the first mounting groove 11 on the transmission housing 1, and the first mounting surface 61 and the first mounting groove 11 are clearance-fitted. An oil return groove 62 is provided on one side surface of the oil baffle cover 6, and one end of the oil return groove 62 facing the lower edge of the oil baffle cover 6 is open.

[0046] The space formed by the transmission housing 1 and the oil shield 6 is a first cavity, which is used to buffer the oil and iron chips that pass through the second mounting groove 13. During the operation of the transmission, the lubricating oil and iron chips splash into the first cavity and are blocked by the inner wall of the oil shield 6, so that the oil and iron chips flow back to the inside of the transmission along the inner wall of the oil shield 6. The bracket 4 passes through the first cavity, so that the magnet 54 protrudes from the oil shield 6, and the magnet 54 faces the gear position sensor 8 outside the cover assembly.

[0047] The upper cover 7 is arranged outside the oil shield 6. The upper cover 7 is a cube with an open lower end and a closed upper end. The outer periphery of the lower end of the upper cover 7 is provided with a second joint surface 71 extending outward. The first joint surface 14 matches the second joint surface 71. The second joint surface 71 is provided with an upper cover through hole 72 corresponding to the housing mounting hole 15. The upper cover fixing bolt 73 is passed through the upper cover through hole 72 and installed in the housing mounting hole 15. The second joint surface 71 of the upper cover 7 is tightly fitted with the first joint surface 14 on the transmission housing 1, so that the upper cover 7 is fixedly installed on the transmission housing 1.

[0048] One side of the upper cover 7 is a second mounting surface 74, on which two sensor mounting holes 75 are provided, and the two sensor mounting holes 75 are respectively located at the upper edge and the lower edge of the second mounting surface 74. The sensor fixing bolt 81 passes through the gear position sensor 8 and is installed in the sensor mounting hole to fix the gear position sensor 8 on the second mounting surface 74 of the upper cover 7. Fixed bosses 76 are respectively provided on the inner walls of the two opposite side surfaces perpendicular to the two side edges of the second mounting surface 74. The bottom end of the fixed boss 76 abuts against the upper end of the oil shield 6 to prevent the oil shield 6 from moving up and down.

[0049] The space formed by the upper cover 7 and the oil shield 6 is the second cavity. Part of the oil and iron filings enter the second cavity through the upper surface of the oil shield 6 opening. Since the magnet 54 in the magnet assembly 5 is higher than the upper surface of the oil shield 6 and offset from the upper surface of the oil shield 6, the oil and iron filings entering the second cavity cannot reach the adsorbable range of the magnet 54, thereby preventing the iron filings from being adsorbed on the magnet 54. The oil and iron filings entering the second cavity can flow downward along the inner wall of the upper cover 7 or the outer wall of the oil shield 6, and flow back to the interior of the transmission through the oil return groove 62 on the oil shield 6.

[0050] Working process: When the transmission shifts gears, the fork shaft 3 moves axially, and the fork shaft 3 drives the fork 2 to move. The fork 2 drives the bracket 4 to move in the second mounting groove 13. The bracket 4 drives the magnet assembly 5 to move, and the relative position of the magnet 54 and the gear sensor 8 changes, resulting in a change in the magnetic field around the gear sensor 8. The gear sensor 8 converts the changing magnetic field into an electrical signal and sends it to the TCU, thereby enabling the TCU to confirm the transmission gear position. The utility model is provided with a baffle assembly to form a relatively independent cavity for the magnet 54 to move, and the relatively independent cavity includes a first cavity and a second cavity. The first cavity relatively isolates the magnet 54 from the internal lubricating oil, and the second cavity prevents the magnet 54 from absorbing iron filings in the splashing oil, thereby reducing the impact on the gear shifting performance.

Claims

1. An electromagnetic induction shifting structure to prevent iron chips from interfering, characterized in that: It comprises a shift fork assembly, a cover assembly, a magnet assembly and a gear position sensor (8) arranged on a transmission housing (1); The transmission housing (1) is provided with a first step-shaped mounting groove (11) and a second mounting groove (13), wherein the first mounting groove (11) is located above the second mounting groove (13); and the transmission housing (1) is also provided with an axial hole located below the second mounting groove (13); The shift fork assembly comprises a shift fork (2) and a shift fork shaft (3), wherein the shift fork (2) is fixedly sleeved on the shift fork shaft (3), one end of the shift fork shaft (3) is connected to the shaft hole, and the shift fork shaft (3) can move axially relative to the transmission housing (1); The magnet assembly comprises a bracket (4) and a magnet assembly (5); the bottom of the bracket (4) is fixedly connected to the shift fork (2); the upper end of the bracket (4) passes through the second mounting groove (13) and the first mounting groove (11) in sequence, and the bracket (4) and the second mounting groove (13) are clearance-matched; the magnet assembly (5) is mounted on the upper end of the bracket (4); and a magnet (54) is provided on the magnet assembly (5); The baffle cover assembly comprises an oil baffle cover (6) and an upper cover (7), the upper surface and the lower surface of the oil baffle cover (6) are both open; the lower end of the oil baffle cover (6) is sealed and installed in the first installation groove (11), the upper end of the bracket (4) passes through the inside of the oil baffle cover (6), and the magnet assembly (5) protrudes from the oil baffle cover (6); the side of the oil baffle cover (6) is also provided with an oil return groove (62); the lower end of the upper cover (7) is open and the upper end is closed; the upper cover (7) is sleeved on the outside of the oil baffle cover (6) and fixedly installed on the transmission housing (1), the first cavity is formed between the oil baffle cover (6) and the transmission housing (1) for blocking the lubricating oil splashing inside the transmission, and a second cavity is formed between the upper cover (7) and the oil baffle cover (6); The gear position sensor (8) is fixedly mounted on a side outer wall of the upper cover (7), and the magnet (54) on the magnet assembly (5) is located in the second cavity and faces the gear position sensor (8).

2. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 1, characterized in that: The transmission housing (1) is also provided with an avoidance groove (12), which plays an avoidance role when the bracket (4) moves with the shift fork (2) in the second mounting groove (13); the avoidance groove (12) is located below the first mounting groove (11) and above the second mounting groove (13), and the width of the avoidance groove (12) is smaller than the width of the first mounting groove (11) and larger than the width of the second mounting groove (13).

3. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 2 is characterized in that: The oil shield (6) is narrow at the top and wide at the bottom. The lower outer ring of the oil shield (6) is provided with a first mounting surface (61) adapted to the mounting surface of the first mounting groove (11). The first mounting surface (61) is mounted in the first mounting groove (11). The oil return groove (62) is provided along the lower edge opening of the oil shield (6).

4. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 3 is characterized in that: The transmission housing (1) and the upper cover (7) are connected via upper cover fixing bolts (73); the transmission housing (1) is provided with a first joint surface (14) on the outer ring of the first mounting groove (11); housing mounting holes (15) are respectively provided at four top corners of the first joint surface (14); a second joint surface (71) matching the first joint surface (14) is provided at the lower edge of the upper cover (7); and an upper cover through hole (72) corresponding to the housing mounting hole (15) is provided on the second joint surface (71); the upper cover fixing bolts (73) pass through the upper cover through hole (72) and are installed in the housing mounting hole (15).

5. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 4, characterized in that: The magnet assembly (5) is connected to the bracket (4) by means of a fixing screw (53); the side of the bracket (4) that is in contact with the magnet assembly (5) is a bracket mounting surface (42), and a screw mounting hole (43) and a positioning pin hole (44) are provided on the bracket mounting surface (42), and the positioning pin hole (44) is located above the screw mounting hole (43); The magnet assembly (5) is provided with a screw through hole (52) and a positioning pin (51), the positioning pin (51) is located on one side of the magnet assembly (5) and is arranged opposite to the positioning pin hole (44), the fixing screw (53) passes through the screw through hole (52) and is installed in the screw installation hole (43), and the positioning pin (51) is located in the positioning pin hole (44); The magnet (54) is located on the other side of the magnet assembly (5).

6. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 5, characterized in that: The bracket (4) is connected to the shift fork (2) via a bracket fixing bolt (45); a bracket through hole (41) is provided at the bottom of the bracket (4); and the bracket fixing bolt (45) passes through the bracket through hole (41) and is fixedly connected to the shift fork (2).

7. An electromagnetic induction shifting structure for preventing iron chips from interfering according to any one of claims 1 to 6, characterized in that: Fixed bosses (76) are provided on the inner walls of two opposite side surfaces of the upper cover (7), and the bottom of the fixed bosses (76) abuts against the upper end of the oil shield (6).

8. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 7, characterized in that: The upper cover (7) and the gear position sensor (8) are connected via a sensor fixing bolt (81); the upper cover (7) comprises a second mounting surface (74), the second mounting surface (74) is located between two side surfaces on which a fixing boss (76) is provided, and two sensor mounting holes (75) are provided on the second mounting surface (74); the sensor fixing bolt (81) passes through the gear position sensor (8) and is installed in the sensor mounting hole (75).

9. The electromagnetic induction shifting structure for preventing iron chips from interfering according to claim 8, characterized in that: The shift fork shaft (3) is provided with a shift fork pin hole (31), and the shift fork (2) is provided with a shift fork pin column installed in the shift fork pin hole (31).

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