Low-interference gear shifting executing mechanism

Abstract

The utility model relates to the technical field of gear shifting executing mechanisms, in particular to a low-interference gear shifting executing mechanism which comprises an air cylinder, a piston, a piston rod, a displacement sensor, magnetic steel, a switch electromagnetic valve and a magnetism isolating cover. The distance between the switch electromagnetic valve and the magnetic steel is adjusted, and the magnetic isolation cover sleeves the outer side of the switch electromagnetic valve, so that the interference of a magnetic field generated by the switch electromagnetic valve in the working process on the magnetic field of the magnetic steel is reduced, the interference is reduced in the transmission process of the magnetic field of the switch electromagnetic valve, and the reliability of the displacement sensor is improved in the gear shifting execution; the accuracy of data acquisition is improved, and actual working requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gear shifting actuator technical field, concretely relates to a low interference gear shifting actuator. BACKGROUND

[0002] With the rapid development of intelligent products, integrated gear shifting actuator, as one of the core parts of intelligent products, is concerned.

[0003] For example, the Chinese utility model patent with the application number 201220617173.8 provides a gear shifting cylinder for vehicle, the controller controls the air inlet passage of each cavity through the on-off control of high frequency solenoid valve, thereby pushing the gear shifting piston to drive the yoke shaft to reciprocate and realize gear shifting, the magnetic steel column arranged on the yoke shaft moves synchronously, the displacement sensor obtains the displacement change of the yoke shaft through the magnetic field generated by the magnetic steel column, and the result is transmitted to the controller.

[0004] Since the displacement sensor obtains the displacement information of the yoke shaft through the magnetic field generated by the magnetic steel column, the high frequency solenoid valve arranged on the cylinder body will also generate a magnetic field when controlling the air inlet passage, thereby interfering with the work of the displacement sensor, leading to inaccurate displacement information obtained by the controller, and unable to provide accurate and reliable data for simulation analysis, reducing the performance of the gear shifting actuator, and failing to meet the actual demand. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a low interference gear shifting actuator, solving the technical problem that the current gear shifting actuator is easy to be interfered.

[0006] The utility model solves the technical problem of the above scheme:

[0007] A low interference gear shifting actuator, comprising a cylinder, a piston, a piston rod, a displacement sensor, a magnetic steel, a switch solenoid valve and a magnetic shield cover.

[0008] The displacement sensor is arranged on the outer wall of the cylinder, the switch solenoid valve is located on the outer side of the cylinder, the piston is located in the cylinder, the magnetic steel is arranged on the piston, one end of the piston rod is located on the outer side of the cylinder, the other end of the piston rod is connected with the piston, the piston and the cylinder form a motion chamber, and the switch solenoid valve is communicated with the motion chamber through an air passage; the magnetic shield cover is sleeved on the outer side of the switch solenoid valve.

[0009] Further limited, the top end of the magnetic shield cover extends above the switch solenoid valve.

[0010] Further limited, the switch solenoid valve comprises a coil, a bracket, a moving iron core, a static iron core, a spring, a pneumatic nozzle and a plug;

[0011] The coil is sleeved outside the support, the support is respectively sleeved outside the moving iron core and the static iron core, the moving iron core is coaxially arranged with the static iron core, the moving iron core is sleeved outside one end of the static iron core, the spring is located between the moving iron core and the static iron core, the moving iron core is movably connected with the static iron core through the spring, a blocking groove is formed in the movable end of the moving iron core, an exhaust cavity is formed in the static iron core, the exhaust cavity is communicated with the blocking groove, the blocking plug is arranged in the blocking groove, and the movable end of the moving iron core faces the pneumatic nozzle; the pneumatic nozzle is connected with the support, the pneumatic nozzle is provided with a gas inlet and a cylinder interface, the gas inlet is arranged along the axis of the pneumatic nozzle, the cylinder interface is located on the side of the gas inlet, and the blocking plug and the pneumatic nozzle surround the air inlet cavity;

[0012] The pneumatic nozzle extends to the outside of the magnetic shield, the magnetic shield is provided with a circular hole, and the exhaust cavity is opposite to the circular hole; the cylinder interface is communicated with the action chamber through the air channel.

[0013] Further limited, the magnetic shield is detachably connected with the support through the connecting piece.

[0014] Further limited, the number of turns of the coil is 800 turns to 890 turns.

[0015] Further limited, the action current of the on-off electromagnetic valve is 0.6A to 0.8A.

[0016] Further limited, the static iron core is a high-permeability iron core block.

[0017] Further limited, the moving iron core is a high-permeability iron core cylinder.

[0018] Further limited, the low-interference gear shifting execution mechanism further comprises an electromagnetic valve closed-loop driving unit, the electromagnetic valve closed-loop driving unit comprises a gear shifting controller and a current acquisition unit, and the gear shifting controller is electrically connected with the on-off electromagnetic valve through the current acquisition unit.

[0019] Further limited, the electromagnetic valve closed-loop driving unit further comprises a high-side switch and a low-side switch, the gear shifting controller is electrically connected with the on-off electromagnetic valve through the high-side switch and the low-side switch respectively, and the current acquisition unit is connected between the high-side switch and the on-off electromagnetic valve.

[0020] The utility model discloses the beneficial effect lies in:

[0021] 1, the utility model discloses a distance between the on -off electromagnetic valve and the magnet steel is adjusted, and the magnetic shield is selected simultaneously and is sleeved outside the on -off electromagnetic valve, reduces the interference of the magnetic field of on -off electromagnetic valve in the working process to the magnetic field of magnet steel, reduces the interference in the propagation process of the magnetic field of on -off electromagnetic valve, thereby in gear shifting execution, improve the reliability of displacement sensor, improve the accuracy of data acquisition, satisfy actual work demand.

[0022] 2、The utility model discloses a structure of switch solenoid valve is optimized, shorten the gas path between gas source import and cylinder interface, guarantee the timely response of pneumatic control when switch solenoid valve is far from cylinder, reduce the coil current and coil turns of current, reduce the magnetic flux of switch solenoid valve, adopt high magnetic permeance moving iron core and static iron core simultaneously, reduce the magnetic resistance, reduce the magnetic flux in external environment, further reduce the interference to the magnetic field of magnetic steel.

[0023] 3、The utility model discloses a closed loop control to switch solenoid valve, avoid the magnetic flux of switch solenoid valve that current is too big increases. DRAWINGS

[0024] Figure 1 It is low interference gear shifting actuator structure schematic diagram of the utility model;

[0025] Figure 2 It is switch solenoid valve and shielding cover connection schematic diagram of the utility model;

[0026] Figure 3 It is switch solenoid valve cross section schematic diagram of the utility model;

[0027] Figure 4 It is switch solenoid valve closed loop control schematic diagram of the utility model;

[0028] In the drawing, 10-cylinder;11-piston;12-piston rod;20-displacement sensor;21-magnetic steel;30-switch solenoid valve;31-coil;32-bracket;33-moving iron core;34-static iron core;35-spring;36-pneumatic nozzle;37-plug;40-gas channel;50-shielding cover;60-plug slot;61-exhaust cavity;62-gas source import;63-cylinder interface;64-gas inlet cavity;65-connection piece;70-gear controller;71-current acquisition unit;72-high side switch;73-low side switch. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the utility model.

[0030] The utility model provides a low interference gear shifting actuator for reducing the influence of the magnetic field generated by switch solenoid valve 30 on the magnetic field of magnetic steel 21, improving the information acquisition accuracy and reliability of displacement sensor 20.

[0031] Embodiment 1

[0032] Reference Figure 1 The embodiment provides a low-interference gear shifting actuator, which comprises a cylinder 10, a piston 11, a piston rod 12, a displacement sensor 20, a magnetic steel 21 and a switching electromagnetic valve 30; wherein the piston 11 is arranged in the interior of the cylinder 10, one end of the piston rod 12 is located outside the cylinder 10, the other end of the piston rod 12 extends to the interior of the cylinder 10 through the cylinder 10 and is connected with the piston 11, the outer wall of the piston 11 is in sealing contact with the inner wall of the cylinder 10, the left and right sides of the piston 11 respectively form corresponding action chambers with the interior of the cylinder 10, and the magnetic steel 21 is sleeved on the piston 11.

[0033] The displacement sensor 20 is arranged on the outer wall of the cylinder 10, and the displacement sensor 20 is close to the magnetic steel 21; the switching electromagnetic valve 30 is arranged outside the cylinder 10, the distance between the switching electromagnetic valve 30 and the magnetic steel 21 is increased, and the interference of the switching electromagnetic valve 30 on the displacement sensor 20 in the working process is reduced.

[0034] At this time, the gas outlet end of the switching electromagnetic valve 30 is communicated with the corresponding action chamber in the interior of the cylinder 10 through the gas channel 40, the number of the switching electromagnetic valve 30 is consistent with the number of the gas channel 40, and the switching electromagnetic valve 30 is communicated with the interior of the cylinder 10 through the corresponding gas channel 40; different numbers of the switching electromagnetic valve 30 are selected according to requirements, for example, two switching electromagnetic valves 30 are respectively communicated with the corresponding action chambers on the left and right sides of the piston 11 through the corresponding gas channels 40; the two switching electromagnetic valves 30 are matched to realize the inflation of any action chamber, so as to drive the piston 11 to move and drive the piston rod 12 to move, and realize gear shifting; meanwhile, the piston 11 drives the magnetic steel 21 to move, the magnetic field generated by the magnetic steel 21 at the position of the displacement sensor 20 changes, and therefore the displacement sensor 20 obtains the moving direction and moving distance of the piston 11, and the collection of gear shifting data is met.

[0035] By increasing the distance between the switching electromagnetic valve 30 and the magnetic steel 21, the reliability of data collection of the displacement sensor 20 is improved.

[0036] Reference Figure 2 It is further illustrated that, in order to further reduce the magnetic field interference of the switching electromagnetic valve 30, a magnetic shield 50 is preferably arranged outside the switching electromagnetic valve 30, so as to reduce the magnetic field strength generated by the switching electromagnetic valve 30 to the outside, thereby reducing the magnetic field interference on the magnetic steel 21 and further improving the reliability of the displacement sensor 20.

[0037] The magnetic shield 50 is preferably made of metal, for example, iron.

[0038] In order to avoid that the sealing of the magnetic shield 50 makes it difficult to dissipate the heat generated in the working process of the switching electromagnetic valve 30, a heat dissipation hole can be formed on the magnetic shield 50, which can not only reduce the material and save the cost, but also reduce the overall weight.

[0039] Further, since the magnetic force line direction generated by the switch electromagnetic valve 30 during operation is along the axis direction of the internal coil 31 from one end of the coil 31 to the other end of the coil 31, the magnetic steel 21 is located in the same horizontal direction as the switch electromagnetic valve 30, and thus the magnetic shield 50 can be a cylindrical structure formed around the circumference, the magnetic shield 50 has no upper and lower end faces at this time, and the height of the magnetic shield 50 in the numerical direction needs to be greater than the height of the switch electromagnetic valve 30 in the vertical direction, thereby reducing the overflow of the magnetic force line and the interference of the switch electromagnetic valve 30 on the magnetic steel 21 in the horizontal direction, and further improving the accuracy and reliability of the displacement sensor 20.

[0040] Reference Figure 3 Further, the switch electromagnetic valve 30 includes the coil 31, the bracket 32, the moving iron core 33, the static iron core 34, the spring 35, the pneumatic nozzle 36, and the stopper 37.

[0041] The bracket 32 is a cylindrical structure, the coil 31 is sleeved on the outside of the bracket 32, the static iron core 34 and the moving iron core 33 are located inside the bracket 32, the moving iron core 33 is a cylindrical structure, the spring 35 and the moving iron core 33 are sequentially sleeved from inside to outside on the left side of the static iron core 34, so that the moving iron core 33 can reciprocate along the axis of the static iron core 34, and when the moving iron core 33 moves to the right, the coil 31 is energized and the spring 35 is compressed; conversely, when the coil 31 is de-energized, the moving iron core 33 moves to the left end under the action of the spring 35.

[0042] The left end of the bracket 32 is connected to the pneumatic nozzle 36, the pneumatic nozzle 36 is provided with a gas inlet 62 and a cylinder interface 63, the gas inlet 62 is provided along the axis of the pneumatic nozzle 36, and the cylinder interface 63 is in communication with the corresponding action chamber inside the cylinder 10 through the gas channel 40.

[0043] The left side of the moving iron core 33 is an active end, the active end is provided with a stopper groove 60, the static iron core 34 is provided with an exhaust cavity 61 inside, the exhaust cavity 61 is provided along the axis of the static iron core 34, the exhaust cavity 61 is in communication with the stopper groove 60, the stopper 37 is arranged in the stopper groove 60, the stopper 37 is opposite to the gas inlet 62, an air inlet cavity 64 is formed between the stopper 37 and the pneumatic nozzle 36, and the gas inlet 62 and the cylinder interface 63 are in communication with the air inlet cavity 64.

[0044] The pneumatic nozzle 36 extends to the outside of the magnetic shield 50 through the magnetic shield 50, the gas inlet 62 is connected to the gas source, the cylinder interface 63 is connected to the action chamber inside the cylinder 10 through the gas channel 40, the bracket 32 is connected to the magnetic shield 50, preferably detachably connected through a connecting piece 65, which is convenient for disassembly and assembly in the later stage; at this time, a circular hole is provided on the corresponding end face of the magnetic shield 50, and the exhaust cavity 61 is opposite to the circular hole to facilitate gas exhaust.

[0045] In the working process, when the coil 31 is energized, the moving iron core 33 compresses the spring 35 under the action of electromagnetic force, approaches the static iron core 34, and the plug 37 moves to the port corresponding to the exhaust cavity 61 to seal the contact, the plug 37 is away from the pneumatic nozzle 36, the air source enters the intake cavity 64 through the air source inlet 62, and then enters the corresponding action chamber of the air cylinder 10 along the air channel 40 through the air cylinder interface 63, and pushes the piston 11 to move.

[0046] When the piston 11 needs to move reversely, the on-off electromagnetic valve 30 connected with the other action chamber is energized; at this time, the on-off electromagnetic valve 30 connected with the current action chamber is de-energized or the current is reduced to the spring 35 to push the moving iron core 33 to move to the left, and at the same time the plug 37 moves to the sealing contact with the air source inlet 62, and at this time the plug 37 is away from the port of the exhaust cavity 61, and the exhaust cavity 61 is connected with the intake cavity 64 through the plug groove 60, so that the air in the action chamber is discharged through the exhaust cavity 61, and the gear shifting operation is realized.

[0047] By optimizing the structure of the on-off electromagnetic valve 30, the distance between the air source inlet 62 and the air cylinder interface 63 is shortened, and at the same time the inner diameter of the air source inlet 62 can be increased to jointly compensate for the increased distance of the air channel 40 due to the distance of the on-off electromagnetic valve 30 away from the magnetic steel 21, so as to ensure that the gear shifting response meets the requirements.

[0048] Further, in order to reduce the magnetic field strength generated by the on-off electromagnetic valve 30 itself, the number of turns of the coil 31 can be reduced in the use process, for example, the number of turns of the coil 31 is reduced from 990 to 800-890, and the preferred number of turns is 890; when the on-off electromagnetic valve 30 acts, the action current in the coil 31 is reduced from 1A to 0.6-0.8A, and the preferred current is 0.7A; the moving iron core 33 is selected as a high magnetic permeability iron core cylinder, and the static iron core 34 is selected as a high magnetic permeability iron core block, so as to reduce the magnetic resistance and thus reduce the magnetic field strength generated by the on-off electromagnetic valve 30 from the source, and reduce the interference to the magnetic field of the magnetic steel 21.

[0049] Reference Figure 4 In order to further reduce the interference of the magnetic field generated by the on-off electromagnetic valve 30, the on-off electromagnetic valve 30 is preferably controlled in a closed loop, the precision of the current of the on-off electromagnetic valve 30 is improved, and at the same time the peak current passing through the on-off electromagnetic valve 30 is avoided to be too large, so as to reduce the current of the on-off electromagnetic valve 30 and thus reduce the magnetic field strength generated by the on-off electromagnetic valve 30.

[0050] Specifically, the low-interference gear actuator includes an electromagnetic valve closed-loop driving unit, the electromagnetic valve closed-loop driving unit includes a gear controller 70 and a current acquisition unit 71, the gear controller 70 is electrically connected with the on-off electromagnetic valve 30 through the current acquisition unit 71, the gear controller 70 acquires the current of the on-off electromagnetic valve 30 collected by the current acquisition unit 71, whether the current meets the preset current is judged, if yes, it is kept, if not, the current size sent by the gear controller 70 is adjusted, the stability of the current is ensured, and the reliability of the action of the on-off electromagnetic valve 30 is ensured.

[0051] Further, the electromagnetic valve closed-loop driving unit further includes a high-side switch 72 and a low-side switch 73, the gear controller 70 is electrically connected with the on-off electromagnetic valve 30 through the high-side switch 72 and the low-side switch 73 respectively; the current acquisition unit 71 is connected between the high-side switch 72 and the on-off electromagnetic valve 30.

[0052] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A low interference shift actuator, characterized by, The cylinder (10), the piston (11), the piston rod (12), the displacement sensor (20), the magnetic steel (21), the on-off electromagnetic valve (30) and the magnetic shield (50) are arranged in sequence. The displacement sensor (20) is arranged on the outer wall of the cylinder (10), the on-off electromagnetic valve (30) is arranged outside the cylinder (10), the piston (11) is arranged in the cylinder (10), the magnetic steel (21) is arranged on the piston (11), one end of the piston rod (12) is arranged outside the cylinder (10), the other end of the piston rod (12) is connected with the piston (11), the piston (11) and the cylinder (10) form a working chamber, and the on-off electromagnetic valve (30) is communicated with the working chamber through the air channel (40).

2. The low-intrusion shift actuator according to claim 1, characterized by, The top end of the magnetic shield (50) extends above the on-off electromagnetic valve (30).

3. The low-intrusion shift actuator according to claim 1, wherein The on-off electromagnetic valve (30) comprises a coil (31), a bracket (32), a moving iron core (33), a static iron core (34), a spring (35), an air nozzle (36) and a stopper (37). The coil (31) is arranged outside the bracket (32), the bracket (32) is arranged outside the moving iron core (33) and the static iron core (34) respectively, the moving iron core (33) and the static iron core (34) are coaxially arranged, the moving iron core (33) is arranged outside one end of the static iron core (34), the spring (35) is arranged between the moving iron core (33) and the static iron core (34), the moving iron core (33) is movably connected with the static iron core (34) through the spring (35), the moving end of the moving iron core (33) is provided with a stopper slot (60), the static iron core (34) is provided with an exhaust cavity (61) in the inside, the exhaust cavity (61) is communicated with the stopper slot (60), the stopper (37) is arranged in the stopper slot (60), the moving end of the moving iron core (33) faces the air nozzle (36), the air nozzle (36) is connected with the bracket (32), the air nozzle (36) is provided with an air source inlet (62) and a cylinder interface (63), the air source inlet (62) is arranged along the axis of the air nozzle (36), the cylinder interface (63) is arranged on the side of the air source inlet (62), and the air nozzle (36) and the stopper (37) form an air inlet cavity (64) around the air nozzle (36), the air source inlet (62) and the cylinder interface (63) are communicated with the air inlet cavity (64). The air nozzle (36) extends to the outside of the magnetic shield (50), the magnetic shield (50) is provided with a circular hole, the exhaust cavity (61) is opposite to the circular hole, and the cylinder interface (63) is communicated with the working chamber through the air channel (40).

4. The low-intrusion gear shift actuator according to claim 3, characterized by The magnetic shield (50) is detachably connected with the bracket (32) through a connecting piece (65).

5. The low-intrusion shift actuator according to claim 3, wherein The number of turns of the coil (31) is 800-890.

6. The low-intrusion shift actuator according to claim 3, wherein The action current of the on-off electromagnetic valve (30) is 0.6-0.8 A.

7. The low-intrusion shift actuator according to claim 3, wherein The static iron core (34) is a high magnetic permeability iron core block.

8. The low-intrusion shift actuator of claim 3, wherein, The moving iron core (33) is a high magnetic permeability iron core cylinder.

9. The low-intrusion shift actuator of claim 1, wherein, The low-interference gear shifting actuator further comprises an electromagnetic valve closed-loop driving unit, which comprises a gear shifting controller (70) and a current acquisition unit (71), and the gear shifting controller (70) is electrically connected with the on-off electromagnetic valve (30) through the current acquisition unit (71).

10. The low-intrusion gear shift actuator according to claim 9, characterized by The electromagnetic valve closed-loop driving unit further comprises a high-side switch (72) and a low-side switch (73), and the gear shifting controller (70) is electrically connected with the on-off electromagnetic valve (30) through the high-side switch (72) and the low-side switch (73) respectively; and the current acquisition unit (71) is connected between the high-side switch (72) and the on-off electromagnetic valve (30).

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