Gear position holding assembly, transmission and vehicle

Abstract

The present application provides a gear position holding assembly, a transmission and an automobile. The gear position holding assembly includes a shift fork shaft, and a plurality of gear position holding mechanisms are provided on the shift fork shaft; the plurality of gear position holding mechanisms are arranged at intervals along the axial direction of the shift fork shaft and correspond to different gears respectively; the gear position holding mechanism is a magnetic control member, so that the shift fork shaft can be maintained at different gear positions. By providing a magnetic control member on the shift fork shaft, when the shift fork shaft moves to different gears, the magnetic control member can make the shift fork shaft in a stable state; compared with the traditional structure, wear is eliminated and the service life is improved.

Description

Technical Field

[0001] This application belongs to the technical field of automobiles, and particularly relates to a gear position holding component, a transmission, and an automobile. Background Art

[0002] When an automobile suddenly accelerates, decelerates, passes through a bumpy road surface, or suddenly brakes during driving, a large torsional vibration impact will be generated. This impact will, in turn, pass through the half shaft, output shaft, and then be transmitted to the gear sleeve and engaging gear ring through the synchronizer hub installed on the shaft, and finally be transmitted to the gear pair and the motor shaft. Therefore, this impact will cause the synchronizer gear sleeve in the transmission to disengage from the engaging gear ring, resulting in transmission gear disengagement, thus losing power, causing phenomena such as vehicle rollback, gear clash, and power interruption. The service life of the synchronizer is greatly affected, which affects the driving safety of the vehicle.

[0003] Due to problems such as gear machining accuracy and universal joint drive installation error, the vehicle transmission may have the problem of automatic gear shifting. To prevent the transmission from automatically shifting gears, usually, the tooth ends of the coupling sleeve and the engaging gear ring are made into reverse slopes, the tooth thickness at the tooth end of the spline hub is thinned, and the tooth end of the coupling sleeve is made into a shoulder, etc. The application of these methods plays a very important role in preventing the transmission from automatically shifting gears, but it is very difficult for the driving device to ensure the transmission of power at a constant angular velocity, so it is particularly prone to automatic gear shifting.

[0004] The gear position holding device of an automobile is mainly used for gear position holding to prevent gear disengagement. Most of the gear locking devices of automobiles adopt the self-locking method of a spring and a locking ball, and the locking ball is usually a steel ball. Among them, most passenger cars are provided with a set of spring and steel ball inside the shift fork body. When shifting gears, the shift fork body moves, and the steel ball is forced by the spring force to be stuck into the card slot of the shift fork shaft, thus realizing locking. The structure is simple. However, after being used for a period of time, it will wear, easily causing gear disengagement, and the reliability of gear locking is relatively low; there is also a method of being linked with the clutch pedal, but it is necessary to change the structure of the transmission housing and add a linkage mechanism, and its structure is complex and the manufacturing cost is also relatively high.

[0005] For the existing gear locking mechanism for gear locking, due to the characteristics of the spring, its maximum gear position holding force is in the end stage, not the initial stage. Therefore, it is necessary to increase the preload on the spring to ensure the holding force in the initial stage. However, when the vibration impact reaches a certain level, the pre-tightening force in the initial stage is still less than the pre-tightening force in the end stage, and there is still a risk of gear position swing and gear disengagement; moreover, only with the layout type of the spring locking ball pin, it is necessary to set the spring stiffness high, which seriously wears the locking pin and the shift fork shaft, reduces the service life of the shifting mechanism, and also increases the shifting force and the difficulty of gear engagement and disengagement. Summary of the Invention

[0006] Therefore, the present application provides a gear position holding component, a transmission, and an automobile, which can solve the problems of wear of the gear position holding mechanism in the prior art, and the risks of swing and gear disengagement of the gear position.

[0007] To solve the above problems, the present application provides a gear position holding component, including:

[0008] A shift fork shaft, on which a plurality of gear position holding mechanisms are provided; the plurality of gear position holding mechanisms are arranged at intervals along the axial direction of the shift fork shaft and correspond to different gear positions respectively;

[0009] The gear position holding mechanism is set as a magnetic control component, so that the shift fork shaft can be maintained at different gear positions.

[0010] Optionally, at least three positions of the shift fork shaft are provided with the plurality of gear position holding mechanisms: both ends and the middle position.

[0011] Optionally, the magnetic control component includes a pair of magnetic groups, and two magnetic parts in the magnetic group are arranged to be relatively movable, one of the magnetic parts is arranged on the shift fork shaft, and the other magnetic part is fixedly arranged.

[0012] Optionally, the shift fork shaft at least includes a long shaft and a short shaft, and the long shaft and the short shaft are axially butted to form the shift fork shaft; the magnetic control component is arranged at the butting position and both ends of the shift fork shaft.

[0013] Optionally, one end of the long shaft is provided with an installation groove, one end of the short shaft is provided with a boss, and the boss is press-fitted into the installation groove; the magnetic part is arranged on the outer periphery of the opening of the installation groove, and the magnetic part includes an annular permanent magnet.

[0014] Optionally, the other ends of the long shaft and the short shaft are provided with accommodation grooves, and the magnetic part includes a magnetic block arranged in the accommodation groove.

[0015] Optionally, a locking part is arranged at the notch of the accommodation groove, and can limit the magnetic block in the accommodation groove.

[0016] According to another aspect of the present application, a transmission is provided, including the gear position holding component as described above.

[0017] Optionally, the transmission includes a housing, and when the magnetic control component includes a pair of magnetic groups, the other magnetic part is arranged on the housing.

[0018] Optionally, a sliding groove is arranged on the housing, and one end of the shift fork shaft is movably inserted into the sliding groove; the other magnetic part is arranged at the bottom and the opening of the sliding groove.

[0019] Optionally, a locking member is further provided at the opening of the sliding groove, which can limit the other magnetic member corresponding to the annular magnet at the docking portion.

[0020] According to another aspect of the present application, a vehicle is provided, including the gear position holding assembly or the transmission as described above.

[0021] A gear position holding assembly provided by the present application includes: a shift fork shaft, on which a plurality of gear position holding mechanisms are provided; the plurality of gear position holding mechanisms are arranged at intervals along the axial direction of the shift fork shaft and correspond to different gear positions respectively; the gear position holding mechanism is set as a magnetic control member, so that the shift fork shaft can be maintained at different gear positions.

[0022] By providing a magnetic control member on the shift fork shaft in the present application, when the shift fork shaft moves to different gear positions, the magnetic control member can make the shift fork shaft in a stable state; compared with the traditional structure, wear is eliminated and the service life is improved. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the gear position holding assembly according to an embodiment of the present application;

[0024] Figure 2 It is a holding schematic diagram when the gear position holding assembly according to an embodiment of the present application is in the neutral state;

[0025] Figure 3 It is a holding schematic diagram when the gear position holding assembly according to an embodiment of the present application is in the geared state;

[0026] Figure 4 It is an exploded view of a part of the shift fork shaft of the gear position holding assembly according to an embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of the gear position holding magnet according to an embodiment of the present application;

[0028] Figure 6 It is a schematic structural diagram of the long shaft according to an embodiment of the present application;

[0029] Figure 7 It is a schematic structural diagram of the short shaft according to an embodiment of the present application.

[0030] The reference numerals are shown as:

[0031] 1. Long shaft; 2. Shift fork; 3. Housing; 4. Locking steel sleeve; 5. Ring magnet; 6. Ring magnet; 7. Short shaft; 8. Locking steel sleeve; 9. Gear position holding magnet; 10. Baffle; a. Installation groove; b. Installation boss; c. Matching boss; d. Accommodating groove. Detailed Description of the Embodiment

[0032] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] Referring jointly to Figures 1 to 7 As shown, according to an embodiment of the present application, a gear position holding assembly includes:

[0035] A shift fork shaft, on which a plurality of gear position holding mechanisms are provided; the plurality of gear position holding mechanisms are arranged at intervals along the axial direction of the shift fork shaft and correspond to different gear positions respectively;

[0036] The gear position holding mechanism is configured as a magnetic control member so that the shift fork shaft can be maintained at different gear positions.

[0037] In the present application, by providing a magnetic control member on the shift fork shaft, when the shift fork shaft moves to different gear positions, the magnetic control member can make the shift fork shaft in a stable state; compared with the traditional structure, wear is eliminated and the service life is improved.

[0038] Due to the absence of wear of the traditional gear position holding mechanism, later maintenance can be avoided, and there will be no impact noise and broken tooth phenomenon generated when the synchronizer is impacted during gear disengagement; of course, the structure of the present application has a greater holding force and is not prone to gear disengagement, and the smoothness and suction of gear engagement are improved.

[0039] In some embodiments, at least three positions of the shift fork shaft are provided with the plurality of gear position holding mechanisms: both ends and the middle position.

[0040] The neutral gear and the gear holding function structure of the vehicle can be separated, and a neutral gear holding device and a holding device for each of the left and right gears are separately provided, that is, a split-type gear holding device. If any one of the neutral gear or the gear holding device fails, it will not affect the effectiveness of the remaining holding devices, which can improve its fault tolerance rate.

[0041] In some embodiments, the magnetic control member includes a pair of magnetic groups, and two magnetic members in the magnetic group are relatively movably arranged. One of the magnetic members is arranged on the shift fork shaft, and the other magnetic member is fixedly arranged.

[0042] Through a pair of magnetic groups, specifically, two gear holding magnets 9 that interact with each other, one is arranged on the shift fork shaft and the other is fixedly arranged; the gear holding magnet 9 can maintain the engaged state. A neutral gear ring magnet 65 is arranged at the middle position of the shift fork shaft to maintain the neutral state. During use, by controlling the magnetization of the magnet, the holding force can be adjusted, and the holding force of each gear can be designed and adjusted specifically.

[0043] In some embodiments, the shift fork shaft at least includes a long shaft 1 and a short shaft 7. The long shaft 1 and the short shaft 7 are axially butted to form the shift fork shaft; the magnetic control member is arranged at the butting position and both ends of the shift fork shaft. Preferably, one end of the long shaft 1 is provided with a mounting groove a, and one end of the short shaft 7 is provided with a boss, and the boss is press-fitted into the mounting groove a; the magnetic member is arranged on the outer periphery of the opening of the mounting groove a, and the magnetic member includes an annular magnet.

[0044] The shift fork shaft adopts a segmented structure, which can be divided into two or three segments, and can be set as one long shaft 1 and one short shaft 7 or set as two short shafts 7 and one long shaft 1. This can facilitate the setting of the magnetic control member at the butting position; for example, each end of the short shaft 7 is provided with a groove for placing the gear holding magnet 9 and the locking steel sleeve 84, and a boss for interference fit is provided at the joint with the long shaft 1. An installation groove a for connecting and cooperating with the short shaft 7 is provided on the long shaft 1, and a section for installing the ring magnet 65 is provided on the outer periphery of the installation groove a. The corresponding magnetic member corresponding to the ring magnet 65 can also be set as an annular structure and sleeved outside the ring magnet 65 to maintain the neutral gear.

[0045] In some embodiments, receiving grooves d are provided at the other ends of the long shaft 1 and the short shaft 7, and the magnetic member includes a magnetic block arranged in the receiving groove d.

[0046] This magnetic block is the gear holding magnet 9, which exerts a magnetic force on the magnet arranged on the shift fork shaft to maintain the position of the gear and is not easy to change.

[0047] In some embodiments, a locking member is arranged at the notch of the receiving groove d to limit the magnetic block in the receiving groove d.

[0048] To ensure the stability of each magnetic component installed on the shift fork shaft, a locking component is provided in the direction where the magnetic component is likely to fall off, including a locking steel sleeve 84 to lock the magnetic component.

[0049] According to another aspect of the present application, a transmission is provided, including the gear position holding assembly as described above.

[0050] In some embodiments, the transmission includes a housing 3. When the magnetic control component includes a pair of magnetic groups, the other magnetic component is provided on the housing 3. Preferably, a chute is provided on the housing 3, and one end of the shift fork shaft is movably inserted into the chute; the other magnetic component is provided at both the bottom and the opening of the chute. More preferably, a locking component is further provided at the opening of the chute, which can limit the other magnetic component corresponding to the annular magnet at the docking position.

[0051] The transmission includes a long shaft 1 having a receiving groove d, a magnet mounting boss b, and a mounting groove a, a shift fork 2 capable of cooperating with a shift motor, a housing 3 capable of mounting a locking steel sleeve 4, an annular magnet 5, a gear position holding magnet 9, and a baffle 10, a short shaft 7 having a mating boss c and a receiving groove d, and the gear position holding magnet 9 is provided with a boss for cooperating with the locking steel sleeve 8. The gear position holding magnet 9 is installed in the receiving groove d of the long shaft 1 and the short shaft 7, and the locking steel sleeve 8 locks and fixes the gear position holding magnet 9. The annular magnet 6 is installed on the mounting boss b of the long shaft 1. The mounting groove a of the long shaft 1 and the mating boss c of the short shaft 7 are connected and fitted by interference or threaded connection methods, and the shift fork 2 is installed at the long shaft 1. Another pair of gear position holding magnets 9 are respectively installed in the magnet mounting holes on the housing 3, and the gear position holding magnets 9 are fixed inside the housing 3 with the baffle 10.

[0052] The present application is applicable to the holding function of different gear positions, such as Figure 2 the neutral state. In the neutral state, only a pair of annular magnets 5 and 6 are attracted to hold the neutral state, while the other pair of gear position holding magnets 9 are in a disengaged state. At this time, the transmission is in the neutral state. When the shift motor receives a shift command, it will control the shift fork to move for synchronizer engagement. The shift fork shaft moves along with the shift fork. At this time, the annular magnets 5 and 6 that maintain the neutral state are disengaged from each other, and the gear position holding magnets 9 are attracted to hold the current gear position under the mutual attractive force of the magnetic poles.

[0053] Such as Figure 3In the shown blocked state, when the distance between the two magnetic steels is closer, the attractive force is greater. Therefore, a relatively large initial gear position holding force can be provided. When it is necessary to shift to another gear position, the shift motor controls the shift fork to drive the shift fork shaft to move. At this time, the gear position holding magnetic steel 9 of the current gear position disengages, and the ring magnetic steels 5 and 6 are combined, and the transmission is in the neutral state. When the engine-driven motor speed is adjusted in place, the shift motor controls the shift fork to drive the synchronizer and the shift fork shaft to continue to move. The two ring magnetic steels disengage, and another pair of gear position holding magnetic steels 9 are attracted to hold the gear position.

[0054] According to another aspect of the present application, there is provided a vehicle including the gear position holding assembly as described above or the transmission as described above.

[0055] It is easy for those skilled in the art to understand that on the premise of no conflict, the above-mentioned various embodiments can be freely combined and superimposed.

[0056] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A gear position holding component, characterized in that, Comprising: A shift fork shaft, on which a plurality of gear position holding mechanisms are provided; the plurality of gear position holding mechanisms are arranged at intervals along the axial direction of the shift fork shaft and correspond to different gear positions respectively; The gear position holding mechanism is set as a magnetic control member, so that the shift fork shaft can be maintained at different gear positions; The plurality of gear position holding mechanisms are at least arranged at three places on the shift fork shaft: both ends and the middle position; The magnetic control member includes a pair of magnetic groups, and two magnetic members in the magnetic group are relatively movably arranged, one magnetic member is arranged on the shift fork shaft, and the other magnetic member is fixedly arranged.

2. The gear position holding assembly according to claim 1, characterized in that, The shift fork shaft at least includes a long shaft (1) and a short shaft (7), and the long shaft (1) and the short shaft (7) are axially butted to form the shift fork shaft; the magnetic control member is arranged at the butting place and both ends of the shift fork shaft.

3. The gear position holding assembly according to claim 2, wherein One end of the long shaft (1) is provided with a mounting groove (a), one end of the short shaft (7) is provided with a boss, and the boss is press-fitted into the mounting groove (a); the magnetic member is arranged on the outer periphery of the opening of the mounting groove (a), and the magnetic member includes an annular permanent magnet.

4. The gear position holding assembly according to claim 2 or 3, characterized in that, The other ends of the long shaft (1) and the short shaft (7) are provided with receiving grooves (d), and the magnetic member includes a magnetic block arranged in the receiving groove (d).

5. The gear position holding assembly according to claim 4, characterized in that A locking member is arranged at the opening of the receiving groove (d) and can limit the magnetic block in the receiving groove (d).

6. A gearbox, characterized in that, Comprising the gear position holding assembly according to any one of claims 1-5.

7. The gearbox according to claim 6, characterized in that, The transmission includes a housing (3), when the magnetic control member includes a pair of magnetic groups, the other magnetic member is arranged on the housing (3).

8. The gearbox according to claim 7, characterized in that, A sliding groove is arranged on the housing (3), and one end of the shift fork shaft is movably inserted into the sliding groove; the other magnetic member is arranged at the bottom and the opening of the sliding groove.

9. The gearbox according to claim 8, characterized in that, A locking member is further arranged at the opening of the sliding groove and can limit the other magnetic member corresponding to the annular permanent magnet at the butting place.

10. A vehicle, characterized in that, Comprising the gear position holding assembly according to any one of claims 1-5 or the transmission according to any one of claims 6-9.

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