Clamping jaw control parking structure

Abstract

The utility model relates to the technical field of automobile engineering, in particular to a clamping jaw control parking structure which at least comprises a buckle valve sleeve part assembly and an electromagnetic part assembly, and the buckle valve sleeve part assembly and the electromagnetic part assembly are fixedly connected with a bent closing opening of a valve shell through the characteristics of a flange plate protruding out of the end of a valve sleeve. The electromagnetic part assembly comprises a valve shell, a gasket, a PIN protection cover, a dustproof cover, two PINs, a solenoid, a rear yoke sleeve and a magnetic core. The gasket is of an injection molding structure and is arranged between the valve shell and the valve sleeve. The clamping spring is mechanically buckled with the outer circle of the large valve element through a sectional structure, and the locking state can still be kept when the electromagnetic valve fails. Even if the electromagnetic force or the spring force disappears, the arc of the clamping spring can still tightly buckle the outer circle of the large valve element, the large valve element push rod is prevented from rebounding, the parking failure risk is completely eradicated from the mechanical structure, the gearbox safety is protected, and double safety guarantees are formed.

Description

Technical Field

[0001] This utility model relates to the field of automotive engineering technology, and more specifically to a chuck control parking structure. Background Technology

[0002] Existing parking solenoid valves have the following technical limitations in their structural design:

[0003] In the existing structure, maintaining the parking state relies on the continuous energization of the solenoid valve or the spring force. When the solenoid valve fails due to power failure, coil malfunction, or other reasons, the external large valve core (such as the large valve core push rod) will lose its holding force and may rebound due to vibration, external force, or other factors, causing the parking lock function to fail unexpectedly, posing a safety hazard of gearbox failure or even vehicle rollover.

[0004] In existing solutions, locking and unlocking actions rely entirely on electromagnetic or spring force: when energized, electromagnetic force drives unlocking, and when de-energized, spring force drives locking. This single-power-source control method is prone to failure of the parking function if the power source (such as a solenoid valve or spring) malfunctions, resulting in insufficient reliability.

[0005] The combination of the round bar push rod and the large valve core is a simple push structure without mechanical locking redundancy design. It cannot cope with environmental interference such as vibration and impact under complex working conditions. After long-term use, it is prone to wear and increased gap, which will lead to a decrease in response accuracy.

[0006] In view of this, the present invention provides a parking structure controlled by a chuck. Utility Model Content

[0007] To achieve the above objectives, the present invention aims to provide a claw-controlled parking structure, comprising at least a snap-fit ​​valve sleeve assembly and an electromagnetic assembly, wherein the snap-fit ​​valve sleeve assembly and the electromagnetic assembly are fixedly connected to the valve housing by a flange feature protruding from the end of the valve sleeve and a bent and closed end.

[0008] The electromagnetic component includes a valve housing, a gasket, a pin protective cover, a dust cover, two pins, a solenoid, a rear yoke, and a magnetic core. The gasket is an injection-molded structure and is located between the valve housing and the valve sleeve. The pin protective cover is fitted over the outside of the pins. The dust cover is fitted over the end of the electromagnetic component. The pins are pre-pressed and welded to the terminals of the solenoid to form an electrical circuit. The solenoid, magnetic core, rear yoke, valve housing, and valve sleeve form a complete magnetic field circuit.

[0009] The snap-fit ​​valve sleeve component includes a snap ring, a return cone spring, a valve core, a first spring seat, and a valve sleeve. The snap ring has a three-jaw structure and is fixed in the groove of the valve sleeve by riveting. The return cone spring is sleeved on the outside of the valve core and its two ends abut against the first spring seat and the valve core, respectively. The magnetic core and the valve core are combined by riveting to form a sub-assembly.

[0010] It also includes a large valve core part, which includes a large valve core push rod, a large valve core return spring and a second spring seat. The large valve core return spring is sleeved on the outside of the large valve core push rod and its two ends respectively abut against the step surface of the second spring seat and the large valve core push rod. The outer circle of the large valve core of the large valve core push rod can cooperate with the snap-fit ​​part of the snap ring.

[0011] When energized, the solenoid generates magnetic force to drive the magnetic core and move the valve core. The return cone spring is compressed, and the retaining ring locks the outer circle of the large valve core to achieve the P output. When de-energized, the return cone spring resets and pushes the valve core. The top of the valve core pushes open the arc of the retaining ring, the retaining ring opens, and the large valve core return spring pushes the large valve core push rod to move to achieve the P input. In addition, when the solenoid valve fails, the retaining ring can lock the outer circle of the large valve core to prevent the large valve core push rod from rebounding.

[0012] As a further improvement to this technical solution, the snap-fit ​​part of the snap ring has a segmented structure. The snap ring is made of spring steel with a thickness of 0.8-1.2mm. The radius of the arc of its snap-fit ​​part is matched with the radius of the outer circle of the large valve core, and the interference is 0.05-0.1mm.

[0013] As a further improvement to this technical solution, the riveting part of the magnetic core and the valve core is an interference fit, and the large valve core return spring is a cylindrical helical spring made of piano wire.

[0014] As a further improvement to this technical solution, the solenoid includes an enameled wire and a bobbin, the enameled wire is wound on the bobbin, and the bobbin is fixed to the valve housing by an interference fit.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. In this type of chuck-controlled parking structure, the retaining spring is mechanically engaged with the outer circle of the large valve core through a segmented structure, maintaining a locked state even when the solenoid valve fails. Even if the electromagnetic force or spring force disappears, the arc of the retaining spring can still tightly engage with the outer circle of the large valve core, preventing the large valve core push rod from rebounding. This eliminates the risk of parking failure from a mechanical structure perspective, protects the transmission safety, and forms a double safety guarantee.

[0017] 2. This claw-controlled parking structure employs a dual-mechanism control system of "electromagnetic force drive + mechanical locking": when energized, the electromagnetic force drives the valve core to compress the return cone spring, causing the retaining spring to lock the large valve core and achieve "P" (parking position); when de-energized, the return cone spring pushes the valve core to open the retaining spring, cooperating with the large valve core's return spring to achieve "P" (parking position). The mechanical locking and power source complement each other; if either component fails, the other can still maintain basic functionality, overcoming the shortcomings of relying on a single power source and improving reliability under complex operating conditions.

[0018] 3. In this type of chuck-controlled parking structure, the arc of the circlip and the outer circle of the large valve core are interference fit, and it is riveted and fixed in the groove of the valve sleeve. The axial displacement is ≤0.1mm, and the fit clearance is stable. The circlip is made of spring steel and has excellent fatigue resistance after being fixed by the riveting process. It can still maintain the locking force after long-term use, adapt to high-frequency vibration and impact environment, improve structural adaptability, reduce the problem of accuracy reduction caused by wear, and extend product life.

[0019] 4. In this claw-controlled parking structure, the mechanical locking action does not require additional power. The locking and unlocking of the circlip can be achieved solely through the axial displacement of the valve core, with a response time of ≤0.3s, which is faster than the traditional pure electromagnetic drive structure. At the same time, the physical limiting characteristics of the mechanical locking avoid the risk of unlocking caused by misoperation. Attached Figure Description

[0020] The present invention will now be described in more detail by way of example, with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Snap ring; 2. Return cone spring; 3. Valve housing; 4. Gasket; 5. Pin protector; 6. Pin; 7. Dust cover; 8. Rear yoke sleeve; 9. Solenoid; 10. Snap-fit ​​valve sleeve assembly; 11. Valve core; 12. Magnetic core; 13. Valve sleeve; 14. First spring seat; 15. Large valve core return spring; 16. Second spring seat; 17. Large valve core push rod; 18. Arc; 20. Electromagnetic assembly; 21. Segmented structure; 22. Outer circle of large valve core. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Please see Figures 1-2 As shown, the purpose of this embodiment is to provide a claw-controlled parking structure, which includes at least a snap-fit ​​valve sleeve assembly 10 and an electromagnetic assembly 20. The snap-fit ​​valve sleeve assembly 10 and the electromagnetic assembly 20 are fixedly connected to the valve housing 3 by the flange feature protruding from the end of the valve sleeve 13 and the bend and closing of the valve housing 3.

[0029] The electromagnetic component 20 includes a valve housing 3, a gasket 4, a pin protection cover 5, a dust cover 7, two pins 6, a solenoid 9, a rear yoke sleeve 8, and a magnetic core 12. The gasket 4 is an injection-molded structure and is located between the valve housing 3 and the valve sleeve 13. The pin protection cover 5 is sleeved on the outside of the pins 6. The dust cover 7 is closed on the end of the electromagnetic component 20. The pins 6 are pre-pressed and welded to the terminals of the solenoid 9 to form an electrical circuit. The solenoid 9, the magnetic core 12, the rear yoke sleeve 8, the valve housing 3, and the valve sleeve 13 form a complete magnetic field circuit.

[0030] The snap-fit ​​valve sleeve component 10 includes a snap ring 1, a return cone spring 2, a valve core 11, a first spring seat 14, and a valve sleeve 13. The snap ring 1 has a three-jaw structure and is fixed in the groove of the valve sleeve 13 by riveting. The return cone spring 2 is sleeved on the outside of the valve core 11 and its two ends abut against the first spring seat 14 and the valve core 11 respectively. The magnetic core 12 and the valve core 11 are combined by riveting to form a sub-assembly.

[0031] It also includes a large valve core part, which includes a large valve core push rod 17, a large valve core return spring 15, and a second spring seat 16. The large valve core return spring 15 is sleeved on the outside of the large valve core push rod 17 and its two ends respectively abut against the step surface of the second spring seat 16 and the large valve core push rod 17. The outer circle 22 of the large valve core of the large valve core push rod 17 can cooperate with the snap-fit ​​part of the snap ring 1.

[0032] When energized, the solenoid 9 generates magnetic force to drive the magnetic core 12 to move the valve core 11, compressing the return cone spring 2 and locking the outer circle 22 of the large valve core to achieve output P; when de-energized, the return cone spring 2 resets and pushes the valve core 11, the top of the valve core 11 pushes open the arc 18 of the locking spring 1, the locking spring 1 opens, the large valve core return spring 15 pushes the large valve core push rod 17 to move to achieve input P, ​​and when the solenoid valve fails, the locking spring 1 can lock the outer circle 22 of the large valve core to prevent the large valve core push rod 17 from rebounding.

[0033] The snap-fit ​​part of the snap ring 1 is a segmented structure 21. The segmented structure 21 consists of two or more segments, which are evenly or non-evenly distributed along the circumference and are square, circular or arc-shaped.

[0034] The snap ring 1 is made of spring steel with a thickness of 0.8-1.2mm. The radius of the arc 18 of its snap-fit ​​part is matched with the radius of the outer circle 22 of the large valve core, and the interference is 0.05-0.1mm.

[0035] The free length of the return cone spring 2 is 25-30mm, the wire diameter is 1.0-1.2mm, the initial preload is 8-12N, and the compression stroke is 5-8mm.

[0036] The riveting part of the magnetic core 12 and the valve core 11 is an interference fit with an interference amount of 0.02-0.04mm, and the coaxiality after riveting is ≤0.03mm;

[0037] The large valve core return spring 15 is a cylindrical helical spring made of piano wire, with a free length of 40-45mm, a wire diameter of 1.5-2.0mm, and a stiffness of 15-20N / mm;

[0038] The solenoid 9 includes an enameled wire and a bobbin. The enameled wire is wound on the bobbin with 600-800 turns and a resistance of 10-15Ω at 25℃. The bobbin is fixed to the valve housing 3 by an interference fit with a clearance of 0.05-0.1mm.

[0039] PIN 6 is made of brass, with a diameter of 1.0-1.2mm and a length of 20-25mm. Its soldering part with the solenoid 9 terminal is soldered, and the solder joint diameter is ≥2mm.

[0040] The valve sleeve 13 is machined from metal, with a groove depth of 1.5-2.0mm and a width of 2.0-2.5mm. After the snap ring 1 is riveted into the groove, the axial displacement is ≤0.1mm.

[0041] The outer diameter of the large valve core 22 of the large valve core push rod 17 is 12-15mm, the surface roughness Ra≤0.8μm, and the axial length of the part that mates with the snap ring 1 is 8-10mm.

[0042] The dust cover 7 is injection molded and made of PBT+30% glass fiber. It fits the valve housing 3 with a clearance fit, with a clearance of 0.1-0.2mm. The dust cover 7 also has a sealing lip on its edge.

[0043] The rear yoke sleeve 8 is machined from metal and made of DT4 electrical pure iron. It is interference-fitted with the valve housing 3 with an interference amount of 0.03-0.05mm to enhance the magnetic conductivity of the magnetic field circuit.

[0044] The snap-fit ​​valve sleeve assembly 10 and the electromagnetic assembly 20 are fixed to the valve housing 3 by bending and closing the flange of the valve sleeve 13 at the end. After bending, the axial gap is ≤0.1mm.

[0045] The snap ring 1 is fixed to the groove of the valve sleeve 13 by three evenly distributed rivets, with a diameter of 3mm and a depth of 0.8mm.

[0046] The magnetic core 12-valve core 11 sub-assembly is installed inside the valve sleeve 13, and the return cone spring 2 is sleeved on the outside of the valve core 11, with its lower end limited by the first spring seat 14.

[0047] The large valve core push rod 17 is inserted into the end hole of the valve sleeve 13, and the large valve core return spring 15 is limited by the second spring seat 16 and abuts against the stepped surface of the large valve core push rod 17.

[0048] The solenoid 9 is sleeved on the outside of the magnetic core 12. After the PIN needle 6 is welded, it is sleeved into the PIN needle protective cover 5. The whole is installed into the valve housing 3, and the rear yoke sleeve 8 is pressed and fixed. The end is fastened with the dust cover 7.

[0049] Unlocking process after leaving P gear: The transmission TCU issues an unlocking command, and 0.2A current is passed through solenoid 9 to generate a magnetic field;

[0050] The magnetic field forms a closed loop through the magnetic core 12, the rear yoke sleeve 8, the valve housing 3, and the valve sleeve 13. The magnetic core 12 is driven by electromagnetic attraction to move the valve core 11 to the right by a stroke of 7mm.

[0051] The valve core 11 compresses the return cone spring 2, and its top end disengages from the arc 18 of the retaining spring 1. The retaining spring 1 contracts under its own elastic force, and the three-jaw buckle part hugs the outer circle 22 of the large valve core to form a mechanical lock.

[0052] The large valve core push rod 17 remains in the unlocked position under the locking of the retaining spring 1, and the gearbox pawl disengages, thus enabling the gear to exit P gear;

[0053] Locking process when shifting to P position: The TCU cuts off the current, and the magnetic force of solenoid 9 disappears;

[0054] The return cone spring 2 releases the preload, pushing the valve core 11 to the left to reset. The top of the valve core 11 pushes open the arc 18 of the retaining spring 1, and the claw of the retaining spring 1 opens outward to a maximum opening diameter of 17mm.

[0055] The large valve core return spring 15 pushes the large valve core push rod 17 to move 10mm to the left, causing the pawl to engage with the ratchet wheel, thus shifting to P gear;

[0056] Failure protection mechanism: When the solenoid valve fails due to power failure, coil burnout, or other reasons;

[0057] If in the P gear position: the retaining spring 1 always holds the outer circle 22 of the large valve core tightly. Even if the return cone spring 2 fails, the mechanical lock can still prevent the large valve core push rod 17 from springing back.

[0058] If in P gear: the retaining ring 1 is in the open state, and the large valve core return spring 15 pushes the large valve core push rod 17 to keep it locked, preventing accidental unlocking.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A parking gripper control structure, characterized in that: It includes at least a snap-fit ​​valve sleeve assembly (10) and an electromagnetic assembly (20), wherein the snap-fit ​​valve sleeve assembly (10) and the electromagnetic assembly (20) are fixedly connected to the valve housing (3) by means of a flange feature protruding from the end of the valve sleeve (13) and a bent and closed end; The electromagnetic component (20) includes a valve housing (3), a gasket (4), a pin protection cover (5), a dust cover (7), two pins (6), a solenoid (9), a rear yoke sleeve (8), and a magnetic core (12). The gasket (4) is an injection-molded structure and is located between the valve housing (3) and the valve sleeve (13). The pin protection cover (5) is sleeved on the outside of the pins (6). The dust cover (7) is closed on the end of the electromagnetic component (20). The pins (6) are welded to the terminals of the solenoid (9) by pre-pressing to form an electrical circuit. The solenoid (9), the magnetic core (12), the rear yoke sleeve (8), the valve housing (3), and the valve sleeve (13) form a complete magnetic field circuit. The snap-fit ​​valve sleeve assembly (10) includes a snap ring (1), a return cone spring (2), a valve core (11), a first spring seat (14), and a valve sleeve (13). The snap ring (1) has a three-jaw structure and is fixed in the groove of the valve sleeve (13) by riveting. The return cone spring (2) is sleeved on the outside of the valve core (11) and its two ends abut against the first spring seat (14) and the valve core (11) respectively. The magnetic core (12) is riveted to the valve core (11). The assembly is formed into a sub-assembly; it also includes a large valve core part, which includes a large valve core push rod (17), a large valve core return spring (15), and a second spring seat (16). The large valve core return spring (15) is sleeved on the outside of the large valve core push rod (17) and its two ends abut against the stepped surfaces of the second spring seat (16) and the large valve core push rod (17) respectively. The outer circle (22) of the large valve core of the large valve core push rod (17) can cooperate with the snap-fit ​​part of the snap ring (1). When energized, the solenoid (9) generates magnetic force to drive the magnetic core (12) to move the valve core (11), the return cone spring (2) is compressed, and the snap ring (1) locks the outer circle (22) of the large valve core to achieve P output; when de-energized, the return cone spring (2) resets and pushes the valve core (11), the top of the valve core (11) pushes open the arc (18) of the snap ring (1), the snap ring (1) opens, the large valve core reset spring (15) pushes the large valve core push rod (17) to move to achieve P input, and when the solenoid valve fails, the snap ring (1) can lock the outer circle (22) of the large valve core to prevent the large valve core push rod (17) from rebounding.

2. The parking structure controlled by a chuck as described in claim 1, characterized in that: The snap-fit ​​part of the snap ring (1) is a segmented structure (21). The snap ring (1) is made of spring steel with a thickness of 0.8-1.2mm. The radius of the arc (18) of its snap-fit ​​part is matched with the radius of the outer circle (22) of the large valve core, and the interference is 0.05-0.1mm.

3. The parking structure controlled by a chuck as described in claim 1, characterized in that: The riveted parts of the magnetic core (12) and the valve core (11) are interference fits, and the large valve core reset spring (15) is a cylindrical helical spring made of piano wire.

4. The parking structure controlled by a chuck as described in claim 1, characterized in that: The solenoid (9) includes an enameled wire and a bobbin. The enameled wire is wound on the bobbin, and the bobbin is fixed to the valve housing (3) by an interference fit.

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