An electromagnetic transmission connection device for automobile starter

Abstract

The present invention relates to the technical field of transmission structures, and in particular to an electromagnetic transmission connection device for an automobile starter, comprising a relatively distributed driven disc and a driving disc, wherein the driven disc is used to transmit power to the engine, and the driving disc is used to receive power transmitted by the starter, and a plurality of protrusions are provided on the end surface of the driven disc; by making the driven disc and the driving disc mutually adsorb each other and utilizing friction to transmit power on the driving disc to the driven disc, power transmission at any relative position between the automobile starter and the engine can be achieved, thereby avoiding the occurrence of tooth biting, tooth topping, tooth collision and the like between gears in traditional gear transmission, thereby facilitating the stable transmission of power; and at the same time, since the driven disc and the driving disc engage with each other using a plurality of protrusions and a card group, the firmness of the transmission relationship between the driven disc and the driving disc can be further improved, thereby avoiding the occurrence of slippage between the driven disc and the driving disc.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission structures, in particular to an electromagnetic transmission connection device for an automobile starter. Background Art

[0002] As the core power source of modern transportation, the automobile engine's starting process mainly relies on the starter. The core task of the starter is to efficiently convert the battery's electrical energy into mechanical torque when the driver issues a start command, driving the engine crankshaft to rotate until the engine reaches a speed that can operate on its own, completing the starting process.

[0003] When the engine starts, the torque output by the starter is needed to overcome the static resistance such as compression resistance and friction resistance inside the engine. With traditional gear transmission, when the starter approaches the engine, the gears on the starter and the gears on the engine will bite or hit each other, resulting in the two gears being unable to transmit normally. In addition, the close collision of the two gears can easily cause the teeth on the gears to break and be damaged. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an electromagnetic transmission connection device for an automobile starter, the specific technical solution adopted by the present invention is:

[0005] An electromagnetic transmission connection device for an automobile starter of the present invention includes a relatively distributed driven disc and a driving disc, wherein the driven disc is used to transmit power to the engine, and the driving disc is used to receive power transmitted by the starter. A plurality of protrusions are provided on the end surface of the driven disc, the interior of the driving disc is hollow, and an electromagnetic structure is provided within the driving disc. When energized, the electromagnetic structure is used to generate suction on the driven disc and enable the driven disc to dock with the driving disc. A card group is provided on the driving disc for use in conjunction with the protrusions, and the card group slides on the driving disc.

[0006] Furthermore, the card group includes a plurality of card bodies distributed in a ring shape, and the card bodies are inclined relative to the axis of the active disk;

[0007] The card body is composed of a plurality of card plates that are in contact with each other in sequence, the butt joint surfaces of two adjacent card plates are coplanar with the axis of the active disk, and the butt joint surfaces of the card plates on two adjacent card bodies are staggered with each other;

[0008] The side wall of the protrusion used in conjunction with the card group is coplanar with the axis of the active disk; the card plate is slidably mounted on the end face of the active disk along the axis of the active disk.

[0009] Furthermore, a permanent magnet is provided at the end of each of the clamping plates facing the electromagnetic structure;

[0010] The electromagnetic structure includes an iron core disk located in the middle and an electromagnetic coil located outside the iron core disk, and a permanent magnetic column is provided on the side of the electromagnetic structure away from the card group;

[0011] Among them, when the electromagnetic coil is powered off, the permanent magnet column and the permanent magnet are respectively in adsorption contact with the two end surfaces of the iron core disk; when the electromagnetic coil is powered on, the magnetic fields at both ends of the iron core disk repel the permanent magnet and the surrounding magnetic fields of the permanent magnet column respectively, and the position of the permanent magnet column is fixed.

[0012] Furthermore, the active disk is provided with a support portion for supporting its rotation and movement.

[0013] Furthermore, the support portion includes a fixed seat, a support ring located inside the fixed seat, and a bearing arranged between the fixed seat and the support ring. A support frame is arranged inside the support ring, and a plurality of rollers are rotatably arranged on the support frame.

[0014] A polygonal column is provided on the end surface of the active disk away from the driven disk, and a plurality of rollers are in rolling contact with the polygonal column on each surface of the active disk in the circumferential direction;

[0015] The polygonal column is connected to the fixing seat via a spring, a through hole is provided in the middle of the polygonal column, the permanent magnet column is located in the through hole, and the end of the permanent magnet column is fixed on the fixing seat.

[0016] Furthermore, two conductive rings are coaxially arranged on the end surface of the active disk, and the two conductive rings are electrically connected to the two ends of the electromagnetic coil respectively. A conductive wheel is rotatably arranged on each conductive ring, and the conductive wheel is connected to an external power supply.

[0017] A slide plate is slidably arranged on the fixing seat, an end portion of the slide plate slides on the outer wall of the active disk, and the conductive wheel is rotatably mounted on the slide plate.

[0018] Furthermore, a gear ring is provided on the outer wall of the active disk, and the gear ring rotates on the active disk. The gear ring and the active disk are connected by a number of elastic bodies. Gears are meshed on the gear ring, and both end faces of the gear are provided with outer edges for limiting the gear ring. The gear is connected to the output end of the external starter.

[0019] Furthermore, a dynamometer is provided on the active disk, one of the elastic bodies is connected to the dynamometer, and the dynamometer is used to detect the direction of the interaction force between the gear ring and the active disk.

[0020] The beneficial effects of the present invention are:

[0021] By making the driven plate and the driving plate attract each other and utilizing friction to transmit the power on the driving plate to the driven plate, power transmission can be achieved at any relative position between the car starter and the engine, avoiding the phenomenon of tooth biting, tooth collision, and tooth collision between gears in traditional gear transmission, thereby facilitating stable power transmission. At the same time, since the driven plate and the driving plate are engaged with each other by utilizing a number of protrusions and card groups, the firmness of the transmission relationship between the driven plate and the driving plate can be further improved, and slippage between the driven plate and the driving plate can be avoided. In addition, this structural method can achieve docking of the driven plate and the driving plate at any position in the circumferential direction of the driving plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the driven disc structure;

[0025] Figure 3 yes Figure 1 Schematic diagram of the active disk structure;

[0026] Figure 4 yes Figure 3 Schematic diagram of explosion structure;

[0027] Figure 5 This is a schematic diagram of the structure of the active disk in an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of an electromagnetic structure in an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a card set in an embodiment of the present invention;

[0030] Figure 8 2 is a structural diagram of a card body according to an embodiment of the present invention;

[0031] Figure 9 2 is a schematic structural diagram of a fixing base in an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Driven disk; 2. Active disk; 3. Bump; 4. Electromagnetic structure; 5. Card group; 6. Card body; 7. Card plate; 8. Permanent magnet; 9. Iron core disk; 10. Electromagnetic coil; 11. Permanent magnet column; 12. Fixed seat; 13. Support ring; 14. Bearing; 15. Support frame; 16. Roller; 17. Polygonal column; 18. Spring; 19. Slide plate; 20. Conductive wheel; 21. Conductive ring; 22. Gear ring; 23. Elastomer; 24. Gear; 25. Dynamometer. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0037] like Figures 1 to 8 As shown, the present invention provides an electromagnetic transmission connection device for an automobile starter, comprising a relatively distributed driven disc 1 and a driving disc 2. The driven disc 1 is used to drive the engine, and the driving disc 2 is used to receive power transmitted by the starter. A plurality of protrusions 3 are provided on the end surface of the driven disc 1. The driving disc 2 is hollow inside and has an electromagnetic structure 4 provided therein. When energized, the electromagnetic structure 4 is used to generate suction to the driven disc 1 and connect the driven disc 1 with the driving disc 2. The driving disc 2 is provided with a card group 5 for use with the protrusions 3, and the card group 5 slides on the driving disc 2.

[0038] In the present invention, the driven disc 1 is mounted on the automobile engine and is in driving connection with the engine, the driving disc 2 is in driving connection with the starter on the automobile, the driven disc 1 and the driving disc 2 are coaxial and relatively distributed; since the electromagnetic structure 4 generates an attractive force on the driven disc 1 when energized, the driven disc 1 can be made of a metallic magnetic conductive material, and the driving disc 2 can be made of a non-metallic or non-magnetic conductive metal material. In this way, the magnetic force generated by the electromagnetic structure 4 can only act on the driven disc 1 or most of it can act on the driven disc 1, so that sufficient interaction force can be generated between the driven disc 1 and the driving disc 2. Of course, since the protrusion 3 is located between the driven disc 1 and the driving disc 2, The electromagnetic structure 4 can also generate a magnetic force acting on the protrusion 3 and the driven disk 1, or only on the protrusion 3. The protrusion 3 can be made of materials according to different usage conditions; a plurality of protrusions 3 are installed on the end surface of the driven disk 1, and the plurality of protrusions 3 can be arranged in a variety of ways such as an annular distribution and a matrix arrangement. Since the main movement mode of the driven disk 1 and the active disk 2 is rotation, the plurality of protrusions 3 can be distributed in an annular manner to facilitate the use with the card group 5 when rotating or stationary. The shape of the protrusion 3 can be any shape such as an arc or a straight line. As long as it can protrude from the end surface of the driven disk 1 and can cooperate with the card group 5, it is within the scope of protection of this case.

[0039] When in use, the electromagnetic structure 4 is energized, and the magnetic field generated by the electromagnetic structure 4 acts on the driven disc 1 and generates a magnetic attraction force on the driven disc 1, thereby bringing the driven disc 1 and the active disc 2 close to each other. Here, the driven disc 1 can be fixed and the active disc 2 close to the driven disc 1, or the active disc 2 can be fixed and the driven disc 1 close to the active disc 2, as long as the driven disc 1 and the active disc 2 can be close to each other, and since the driven disc 1 is connected to the automobile engine, the position of the driven disc 1 is generally fixed, and the active disc 2 moves and approaches the driven disc 1; when the driven disc 1 and the active disc 2 are close, and the protrusion 3 abuts against the driven disc 1, the mutual squeezing force between them will be converted into friction force, thereby When the active disk 2 rotates, the friction force is used to rotate the driven disk 1 and the engine, thereby realizing transmission work; when the protrusion 3 is docked with the active disk 2, since the card group 5 can slide on the active disk 2, the part of the card group 5 corresponding to the protrusion 3 is squeezed by the protrusion 3 and can slide into the active disk 2, while the other card groups 5 remain in a state of protruding from the end surface of the active disk 2. At this time, due to the active rotation of the active disk 2, the part of the card group 5 protruding from the end surface of the active disk 2 will provide an extrusion thrust to the side of the protrusion 3 in the circumferential direction of the active disk 2, causing the protrusion 3 and the driven disk 1 to rotate. At this time, the friction force and the locking thrust between the protrusion 3 and the card group 5 are used to realize power transmission between the active disk 2 and the driven disk 1;

[0040] It should be noted that, since the protrusion 3 can push any portion of the card group 5 corresponding to the position of the protrusion 3 on the driving disk 2 to slide into the driving disk 2, the protrusion 3 and the card group 5 can achieve a mutual locking function at any angle, that is, the driven disk 1 and the driving disk 2 can achieve a transmission function at any relative position. Since the driving disk 2 actively moves and docks with the driven disk 1, the position of the automobile starter can be fixed, and there is no need to move the starter and bring it close to the engine to provide starting power to the engine, as in the traditional starter installation method.

[0041] By making the driven disc 1 and the driving disc 2 attract each other and utilizing friction to transmit the power on the driving disc 2 to the driven disc 1, power transmission can be achieved at any relative position between the automobile starter and the engine, avoiding the phenomena of tooth biting, tooth collision, and tooth collision between gears in traditional gear transmission, thereby facilitating stable power transmission. At the same time, since the driven disc 1 and the driving disc 2 are engaged with each other by utilizing a plurality of protrusions 3 and a card group 5, the firmness of the transmission relationship between the driven disc 1 and the driving disc 2 can be further improved, and slippage between the driven disc 1 and the driving disc 2 can be avoided. In addition, this structural method can achieve docking of the driven disc 1 and the driving disc 2 at any position in the circumferential direction of the driving disc 2.

[0042] Furthermore, the card group 5 includes a plurality of card bodies 6 distributed in a ring shape, and the card bodies 6 are inclined relative to the axis of the active disk 2;

[0043] The card body 6 is composed of a plurality of card plates 7 that are in contact with each other in sequence. The butt joint surfaces of two adjacent card plates 7 are coplanar with the axis of the active disk 2, and the butt joint surfaces of the card plates 7 on two adjacent card bodies 6 are staggered with each other.

[0044] Among them, the side wall of the protrusion 3 and the card group 5 used in conjunction with the axis of the active disk 2 is coplanar; the card plate 7 is slidably installed on the end surface of the active disk 2 along the axis direction of the active disk 2;

[0045] like Figure 3 and Figure 7 As shown, a plurality of card bodies 6 are distributed in an annular manner on the end surface of the active disk 2, and the card bodies 6 are inclined relative to the axis of the active disk 2. The card bodies 6 are conical in shape. In this way, in the circumferential direction of the active disk 2, each card body 6 can cover a large area, and adjacent card bodies 6 can complement each other. Since the card bodies 6 are composed of a plurality of card plates 7, the protrusions 3 can abut against different card plates 7 and push the card plates 7 to slide into the active disk 2, while the other card plates 7 remain protruding from the end surface of the active disk 2. The protruding card plates 7 can contact the side walls of the protrusions 3 and provide rotational thrust thereto.

[0046] Since the plurality of card plates 7 on the card body 6 are arranged in sequence, the card plate 7 in contact with the side wall of the protrusion 3 can be assisted in pushing by the plurality of card plates 7 behind the card plate 7, thereby improving the overall strength of the plurality of card plates 7 in the working state and preventing the card plate 7 from bending under force when a single card plate 7 contacts the side of the protrusion 3;

[0047] Since the mating surfaces of the two adjacent card plates 7 and the side walls of the protrusion 3 are coplanar with the axis of the active disk 2, it is convenient to make the card plate 7 and the protrusion 3 in surface contact and accurately dock, and it is convenient to process the protrusion 3 and the card plate 7; since the mating surfaces of several card plates 7 on the two adjacent card bodies 6 are staggered with each other, the number and density of the mating surfaces within the specified angular range in the circumferential direction of the active disk 2 can be increased, so that the protrusion 3 can find the corresponding mating surface at any angular position, avoiding the situation where the number of mating surfaces is too small, when the protrusion 3 pushes the corresponding card plate 7 to slide into the active disk 2, the spacing between the adjacent card plates 7 and the protrusion 3 is too large, and the active disk 2 needs to be rotated a certain angle before the card plate 7 can abut against the protrusion 3, avoiding the card plate 7 and the protrusion 3 colliding with each other in this state.

[0048] Furthermore, each end of each clamping plate 7 facing the electromagnetic structure 4 is provided with a permanent magnet 8;

[0049] The electromagnetic structure 4 includes an iron core disk 9 in the middle and an electromagnetic coil 10 outside the iron core disk 9. A permanent magnet column 11 is provided on the side of the electromagnetic structure 4 away from the card group 5.

[0050] When the electromagnetic coil 10 is powered off, the permanent magnet 11 and the permanent magnet 8 are in adsorption contact with the two end surfaces of the core disk 9 respectively. When the electromagnetic coil 10 is powered on, the magnetic fields at both ends of the core disk 9 repel the magnetic fields around the permanent magnet 8 and the permanent magnet 11 respectively, and the position of the permanent magnet 11 is fixed.

[0051] The electromagnetic coil 10 is connected to the car battery, and the permanent magnet 8 and the permanent magnet column 11 are used. When the electromagnetic coil 10 is powered off, the permanent magnet 8 and the permanent magnet column 11 can be attracted to each other with the iron core disk 9. Since the position of the permanent magnet column 11 is fixed, the electromagnetic structure 4 will actively approach the permanent magnet column 11, thereby positioning the initial position of the active disk 2 to prevent it from moving at will; when the permanent magnet 8 is attracted to the iron core disk 9, the end of the card plate 7 does not protrude beyond the end face of the active disk 2, that is, the end face of the active disk 2 is flat, and the card plate 7 maintains a sliding connection relationship with the active disk 2. In detail, a sliding port for sliding the card plate 7 is provided on the end face of the active disk 2, the end of the card plate 7 is located in the sliding port, and the other part of the card plate 7 is located in the active disk 2. The permanent magnet 8 on the card plate 7 and the iron core disk 9 are attracted to each other and fixed. When the electromagnetic coil 10 is energized, a magnetic field is generated around the core disk 9, and a repulsive force is generated between the core disk 9 and the permanent magnet column 11. At this time, with the help of the permanent magnet column 11, the active disk 2 moves toward the driven disk 1, thereby providing moving power for the active disk 2. At the same time, a repulsive force is generated between the core disk 9 and the permanent magnet 8, and the core disk 9 pushes the permanent magnets 8 and the card plates 7 thereon to slide toward the outside of the active disk 2. Since the number of card plates 7 is large, the volume of the permanent magnets 8 is small, and the force between the permanent magnets 8 and the core disk 9 is relatively small. The force between the core disk 9 and the driven disk 1 or the protrusion 3 will cause the active disk 2 to abut against the protrusion 3. At this time, the protrusion 3 will block some of the card plates 7, preventing them from moving outside the active disk 2, while other card plates 7 can be smoothly moved outside the active disk 2;

[0052] Based on the above implementation, by adopting electromagnetic methods, multiple tasks such as pushing and moving the active disk 2, abutting the active disk 2 and the protrusion 3, and locking the card plate 7 can be achieved. Its control method and structural method are simple and easy to operate. The card plate 7 can be made of non-magnetic and high-hardness material.

[0053] Furthermore, a support portion is provided on the active disk 2 for supporting its rotation and movement; since the active disk 2 can move and rotate, a separate support portion needs to be set up for the active disk 2 to improve its movement stability and firmness. The support portion can adopt a traditional slider, ring or other structural method.

[0054] Optimized to the above implementation, such as Figure 5 and Figure 8 As shown, the support portion includes a fixed seat 12, a support ring 13 located inside the fixed seat 12, and a bearing 14 arranged between the fixed seat 12 and the support ring 13. A support frame 15 is arranged inside the support ring 13, and a plurality of rollers 16 are rotatably arranged on the support frame 15.

[0055] A polygonal column 17 is provided on the end surface of the active disk 2 away from the driven disk 1, and a plurality of rollers 16 are in rolling contact with the polygonal column 17 on each surface in the circumferential direction of the active disk 2;

[0056] The polygonal column 17 is connected to the fixing seat 12 via a spring 18. A through hole is provided in the middle of the polygonal column 17. The permanent magnet column 11 is located in the through hole, and the end of the permanent magnet column 11 is fixed to the fixing seat 12.

[0057] In the present invention, the fixed seat 12 can support the various structures therein, and the support ring 13 can be used to support the bearing 14 and the support frame 15. The rotation axis of the bearing 14 is coaxial with the active disk 2, and the rotation axis of the roller 16 is perpendicular to the axis of the active disk 2. The plurality of rollers 16 are distributed in a polygonal shape, and the rollers 16 are used in conjunction with each edge of the polygonal column 17; when the active disk 2 moves, it will drive the polygonal column 17 to move synchronously, and the plurality of rollers 16 can support the polygonal column 17 and prevent relative friction between them. When the active disk 2 rotates, it will use the bearing 14 to achieve low-friction operation, thereby achieving low-friction support for various movement modes of the active disk 2 through the support portion, thereby improving its movement stability and avoiding wear; when the electromagnetic coil 10 is powered off, the spring 18 can help the polygonal column 17 and the active disk 2 to reset.

[0058] Furthermore, two conductive rings 21 are coaxially arranged on the end surface of the active disk 2. The two conductive rings 21 are electrically connected to the two ends of the electromagnetic coil 10 respectively. A conductive wheel 20 is rolled on each conductive ring 21, and the conductive wheel 20 is connected to an external power supply.

[0059] A slide plate 19 is slidably mounted on the fixed seat 12. The end of the slide plate 19 slides on the outer wall of the active disk 2, and the conductive wheel 20 is rotatably mounted on the slide plate 19.

[0060] When the active disk 2 rotates, the active disk 2 and the end of the skateboard 19 slide relative to each other, and the skateboard 19 is stationary. When the active disk 2 moves, it will drive the skateboard 19 to move synchronously. Since the active disk 2 can rotate, in order to power the electromagnetic coil 10 therein, it is necessary to adopt the above-mentioned structural method. The two ends of the electromagnetic coil 10 are connected to the two conductive rings 21. The external power supply can be electrically connected to the two ends of the electromagnetic coil 10 through the two conductive wheels 20 and the two conductive rings 21. When the active disk 2 rotates, the conductive ring 21 rotates, and the conductive wheel 20 rolls on the conductive ring 21, and an electrical connection is maintained between them. When the active disk 2 moves, the skateboard 19 will slide on the fixed seat 12, thereby achieving the effect of powering the rotating electromagnetic coil 10 located inside the active disk 2.

[0061] Furthermore, a gear ring 22 is provided on the outer wall of the driving disk 2, and the gear ring 22 rotates on the driving disk 2. The gear ring 22 and the driving disk 2 are connected by a plurality of elastic bodies 23. A gear 24 is meshed with the gear ring 22. Both end surfaces of the gear 24 are provided with outer edges for limiting the gear ring 22. The gear 24 is connected to the output end of the external starter.

[0062] Since the gear 24 is provided with two outer edges, the gear ring 22 can be limited by the two outer edges, so that the relative position relationship between the gear 24 and the gear ring 22 remains unchanged. When the driving disk 2 moves, the gear ring 22 and the gear 24 will move synchronously. The gear 24 can be connected to the external starter through a structure such as a telescopic rod or a sliding rod. In this way, when the driving disk 2 and the gear 24 move, the position of the starter remains unchanged.

[0063] During use, the starter can be used to first drive the active disk 2 to rotate, and then the active disk 2 is docked with the driven disk 1, or the driven disk 1 is docked with the active disk 2, and then the starter is used to drive the active disk 2 and the driven disk 1 to rotate synchronously. No matter which method is used, the static inertia force of the active disk 2 and the driven disk 1 will impact the starter. Therefore, in order to reduce the impact, a plurality of elastic bodies 23 can be used for buffering. That is, when the starter drives the gear 24 and the gear ring 22 to rotate, the active disk 2 cannot rotate instantly due to inertia. At this time, the speed of the gear ring 22 will be higher than the speed of the active disk 2. The force of the gear ring 22 on the elastic body 23 will cause it to be elastically deformed. The elastic body 23 uses the elastic force to push the active disk 2 to rotate, thereby achieving a buffering effect in the process of kinetic energy transmission.

[0064] Furthermore, a dynamometer 25 is provided on the active disc 2, and an elastic body 23 is connected to the dynamometer 25, and the dynamometer 25 is used to detect the direction of the interaction force between the gear ring 22 and the active disc 2;

[0065] When the starter provides power to the engine, the gear ring 22 provides rotational power to the active disc 2 through the elastic body 23. At this time, the dynamometer 25 detects that the direction of the elastic force of the elastic body 23 is in the positive direction. When the engine is started, its speed will be higher than that of the starter in the normal state. At this time, the active disc 2 drives the gear ring 22 to rotate in the reverse direction through the elastic body 23. The dynamometer 25 detects that the direction of the elastic force of the elastic body 23 is in the reverse direction. Therefore, the dynamometer 25 is used to detect the direction of the elastic force of the elastic body 23 to detect whether the engine has been started. When the engine is started, the electromagnetic coil 10 is de-energized. At this time, the active disc 2 is reset and separated from the driven disc 1.

[0066] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic transmission connection device for an automobile starter, characterized in that: The driven disc and the driving disc are relatively distributed. The driven disc is used to transmit power to the engine, and the driving disc is used to receive power transmitted by the starter. The end surface of the driven disc is provided with a plurality of protrusions. The interior of the driving disc is hollow and an electromagnetic structure is provided in the driving disc. When the electromagnetic structure is energized, it is used to generate suction force on the driven disc and make the driven disc dock with the driving disc. The driving disc is provided with a card group used in conjunction with the protrusions, and the card group slides on the driving disc. When the protrusion docks with the active disk, the card group slides on the active disk, and the part of the card group corresponding to the protrusion is squeezed by the protrusion and slides into the active disk, while the other card groups remain protruding from the end face of the active disk. As the active disk rotates, the part of the card group protruding from the end face of the active disk will provide an extrusion thrust to the side of the protrusion in the circumferential direction of the active disk, causing the protrusion and the driven disk to rotate. The power transmission between the active disk and the driven disk is achieved by the friction force and the positioning thrust between the protrusion and the card group.

2. The electromagnetic transmission connection device for an automobile starter according to claim 1, characterized in that: The card group includes a plurality of card bodies distributed in a ring shape, and the card bodies are inclined relative to the axis of the active disk; The card body is composed of a plurality of card plates that are in contact with each other in sequence, the butt joint surfaces of two adjacent card plates are coplanar with the axis of the active disk, and the butt joint surfaces of the card plates on two adjacent card bodies are staggered with each other; The side wall of the protrusion used in conjunction with the card group is coplanar with the axis of the active disk; the card plate is slidably mounted on the end face of the active disk along the axis of the active disk.

3. The electromagnetic transmission connection device for an automobile starter according to claim 2, characterized in that: A permanent magnet is provided at the end of each of the clamping plates facing the electromagnetic structure; The electromagnetic structure includes an iron core disk located in the middle and an electromagnetic coil located outside the iron core disk, and a permanent magnetic column is provided on the side of the electromagnetic structure away from the card group; Among them, when the electromagnetic coil is powered off, the permanent magnet column and the permanent magnet are respectively in adsorption contact with the two end surfaces of the iron core disk; when the electromagnetic coil is powered on, the magnetic fields at both ends of the iron core disk repel the permanent magnet and the surrounding magnetic fields of the permanent magnet column respectively, and the position of the permanent magnet column is fixed.

4. The electromagnetic transmission connection device for an automobile starter according to claim 3, characterized in that: The active disk is provided with a supporting portion for supporting its rotation and movement.

5. The electromagnetic transmission connection device for an automobile starter according to claim 4, characterized in that: The support portion includes a fixed seat, a support ring located inside the fixed seat, and a bearing arranged between the fixed seat and the support ring. A support frame is arranged inside the support ring, and a plurality of rollers are rotatably arranged on the support frame. A polygonal column is provided on the end surface of the active disk away from the driven disk, and a plurality of rollers are in rolling contact with the polygonal column on each surface of the active disk in the circumferential direction; The polygonal column is connected to the fixing seat via a spring, a through hole is provided in the middle of the polygonal column, the permanent magnet column is located in the through hole, and the end of the permanent magnet column is fixed on the fixing seat.

6. The electromagnetic transmission connection device for an automobile starter according to claim 5, characterized in that: Two conductive rings are coaxially arranged on the end surface of the active disk, and the two conductive rings are electrically connected to the two ends of the electromagnetic coil respectively. A conductive wheel is rotatably arranged on each conductive ring, and the conductive wheel is connected to an external power supply; A slide plate is slidably arranged on the fixing seat, an end portion of the slide plate slides on the outer wall of the active disk, and the conductive wheel is rotatably mounted on the slide plate.

7. The electromagnetic transmission connection device for an automobile starter according to claim 1, characterized in that: A gear ring is provided on the outer wall of the active disk, and the gear ring rotates on the active disk. The gear ring and the active disk are connected by a plurality of elastic bodies. A gear is meshed with the gear ring. Both end faces of the gear are provided with outer edges for limiting the gear ring. The gear is connected to the output end of the external starter.

8. The electromagnetic transmission connection device for an automobile starter according to claim 7, characterized in that: A dynamometer is provided on the active disk, one of the elastic bodies is connected to the dynamometer, and the dynamometer is used to detect the direction of the interaction force between the gear ring and the active disk.

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