A double rod driving gear shifting actuator with sensing of head position

Abstract

The utility model relates to a double -screw rod drive gear shifting executor of the position of poking head can induct, it includes: two groups of execution subassembly, each group execution subassembly includes motor, screw rod mechanism and poking mechanism, the screw rod mechanism includes one end with motor connects the screw rod and the screw rod nut of straight -line motion installation on screw rod, the poking mechanism includes the poking body rotatablely installed on the casing through the pivot, the joint of the card of forming in the one end of poking body and with screw rod nut cooperates to synchronous movement and the poking head of forming in the other end of poking body, locking mechanism, locking mechanism includes the sliding sleeve of fixed on the casing and the sliding pin of activity arrangement in the sliding sleeve, the poking mechanism still includes the magnet of installation on the side of poking body, it still includes the sensor of installation between two groups poking mechanism and with magnet cooperates, can realize the position of perceiving two poking head.

Description

Technical Field

[0001] This utility model belongs to the field of automotive transmission structure technology, and relates to a dual-screw drive shift actuator, specifically a dual-screw drive shift actuator with a shift head position sensing capability. Background Technology

[0002] The shift actuator is a key component of an automotive transmission system. Its primary function is to drive the gearbox to change gears according to instructions from the shift controller, thereby enabling the vehicle to operate normally. Currently, shift actuators primarily use pneumatic, hydraulic, or traditional mechanical methods to drive the shift fork and shift gears. Regardless of whether the drive method is pneumatic, hydraulic, or mechanical, there is a risk of accidental disengagement, leading to safety hazards.

[0003] Chinese utility model patent application number 202522394145.0 discloses a dual-screw drive shift actuator, which includes: two sets of actuator components, each set including a motor, a screw mechanism, and a shifting head mechanism; the screw mechanism includes a screw connected to the motor at one end and a screw nut linearly mounted on the screw; the shifting mechanism includes a shifting body rotatably mounted on a housing via a pin, a locking connector formed at one end of the shifting body and cooperating with the screw nut for synchronous movement, and a shifting head formed at the other end of the shifting body; and a locking mechanism, which includes a sliding sleeve fixed to the housing and a sliding pin movably disposed within the sliding sleeve. This design allows the sliding pin to engage with the shifting mechanism on the other side when one screw mechanism moves, effectively preventing simultaneous movement of both screw mechanisms due to misoperation or software control misalignment. However, the shifting head position of this dual-screw drive shift actuator is not perceptible, requiring additional sensing devices and resulting in a complex structure. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual-screw drive shift actuator with a throttle position sensing capability.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a dual-screw drive shifting actuator with a shift head position sensing capability, comprising: Two sets of actuators, each set including a motor, a lead screw mechanism, and a turning mechanism; the lead screw mechanism includes a lead screw connected to the motor at one end and a lead screw nut that is linearly movable and mounted on the lead screw; the turning mechanism includes a turning body that is rotatably mounted on the housing via a pin, a snap-fit ​​connector formed at one end of the turning body and cooperating with the lead screw nut for synchronous movement, and a turning head formed at the other end of the turning body; The locking mechanism includes a sliding sleeve fixed on the housing and a sliding pin movably disposed in the sliding sleeve. When one of the actuating bodies rotates about the axis of the pin, one of the actuating bodies pushes the sliding pin to insert into the other actuating body. The actuation mechanism also includes a magnet mounted on the side of the actuation body. It also includes a sensor mounted between the two sets of the actuating mechanisms and cooperating with the magnet.

[0006] Ideally, it also includes a connector that connects to the sensor via a cable.

[0007] Furthermore, the snap-fit ​​connector has a clearance groove for the lead screw to pass through; at least one limiting protrusion is formed on the circumferential surface of the lead screw nut, and at least one limiting groove corresponding to the limiting protrusion is provided on the snap-fit ​​connector.

[0008] Furthermore, a receiving hole is provided on the side of the actuating body, and the pin passes through the receiving hole in a clearance fit manner.

[0009] Ideally, the two actuating bodies have a dial groove on their opposing sides, and the two ends of the sliding pin have push cones that cooperate with the dial groove.

[0010] Ideally, the dial head and the dial head groove of the same actuating mechanism are located on both sides of the receiving hole.

[0011] The beneficial effects of this application are: the dual screw drive shift actuator with position sensing of the shift head of this utility model can sense the position of the two shift heads by adding a magnet on the side of the shift body and installing a sensor that cooperates with the magnet between the two shift mechanisms, thus achieving a high degree of integration. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the dual-screw drive shift actuator with a shift head position sensing capability of this utility model. Figure 2 This is a partial structural diagram of the dual-screw drive shift actuator with a shift head position sensing capability of this utility model. Figure 3 for Figure 2 Cross-sectional view. Detailed Implementation

[0013] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0014] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0015] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0016] like Figures 1 to 2 The dual-screw drive shift actuator shown has a position sensing capability and mainly includes two sets of cooperating actuators, a screw mechanism 22, a shifting mechanism 5, a sensor 7, and a locking mechanism 8.

[0017] Preferably, the two sets of execution components are arranged side by side and aligned (the structures of the two sets of execution components can be completely identical; or they can be slightly different, as long as the principle is the same; in this embodiment, the structures of the two sets of execution components are slightly different). Each set of execution components includes a motor 1, a lead screw mechanism 2, and a turning mechanism 5. The lead screw mechanism 2 includes a lead screw 21 connected to the motor 1 at one end and a lead screw nut 22 that is linearly mounted on the lead screw 21 (the engagement between the lead screw nut 22 and the lead screw 21 adopts a conventional method, such as a threaded connection; the motor 1 has a motor shaft, and the motor 1 and the lead screw 21 are connected and engaged through the motor shaft. Thus, when the motor 1 is working, it can drive the lead screw 21 to rotate, thereby driving the lead screw nut 22 to move linearly on the lead screw 21 (reciprocating linear motion)).

[0018] The shifting mechanism 5 includes a shifting body 51 rotatably mounted on a housing via a pin 6 (the pin 6 is fixed to the housing by an interference fit; the housing is typically the outer shell of a double-screw drive shift actuator), a snap-fit ​​connector 53 formed at one end of the shifting body 51 and cooperating with the screw nut 22 for synchronous movement, and a shift head 52 formed at the other end of the shifting body 51. Thus, when the screw nut 22 moves linearly on the screw 21, the screw nut 22 can synchronously drive the shifting body 51 to rotate about the axis of the pin 6, causing the shift head 52 to be in different positions, thereby achieving gear shifting for the corresponding automotive transmission or electric drive axle. Since there are two sets of actuators, each set having at least two gear positions (at least a starting position and a final position, but preferably a starting position and a final position), the two sets of actuators have at least four gear positions (preferably four gear positions), enabling multi-gear shifting for automotive transmissions, electric drive axles, etc. In addition, the actuation mechanism 5 also includes a magnet 56 mounted on the side of the actuation body 51 (the side being the surface of the two actuation bodies 51 facing each other). In this embodiment, the snap-fit ​​connector 53 has a clearance groove 531 for the lead screw 21 to pass through, preferably allowing the lead screw nut 22 to be accommodated in the clearance groove 531. At least one limiting protrusion 221 (preferably cylindrical) is formed on the circumferential surface of the lead screw nut 22, and at least one limiting groove 532 corresponding to the limiting protrusion 221 is provided on the snap-fit ​​connector 53 (preferably two limiting protrusions 221 and two limiting grooves 532). Thus, the limiting protrusion 221 is placed within the limiting groove 532 and clearance-fitted therewith, thereby allowing the lead screw nut 22 to better drive the actuating mechanism 5 to rotate relative to the pin 6. A receiving hole 54 is provided on the side of the actuating body 51, and the pin 6 is inserted into the receiving hole 54 in a clearance-fit manner, thus not affecting the rotation of the actuating body 51 relative to the pin 6.

[0019] The dual-screw drive shift actuator with shifter position sensing also includes a sensor 7 mounted between the two sets of shifting mechanisms 5 and cooperating with magnets 56; specifically, the sensor 7 is typically bolted to the housing and located between the two magnets 56 for sensing the position of the magnets 56. The dual-screw drive shift actuator with shifter position sensing also includes a connector 9 connected to the sensor 7 via a cable for outputting the signal sensed by the sensor 7.

[0020] The locking mechanism 8 includes a sliding sleeve 80 fixed to the housing (i.e., the sliding sleeve 80 and the housing cannot move relative to each other; they are located between two sets of actuators) and a sliding pin 81 movably disposed within the sliding sleeve 80 (the sliding sleeve 80 and the sliding pin 81 are clearance-fitted, allowing the sliding pin 81 to move axially along the sliding sleeve 80 under external force). When one actuating body 51 rotates about the axis of the pin 6, the actuating body 51 pushes the sliding pin 81 to insert into another actuating body 51; when the axis of the other actuating body 51 rotates, the other actuating body 51 pushes the sliding pin 81 to insert into one actuating body 51 (and so on). In this embodiment, as... Figure 2 and Figure 3 As shown, the two actuating bodies 51 have actuating head groove 55 on their opposing sides, so that the actuating head groove 55 is arranged adjacent to a receiving hole 54; the actuating head 52 and the actuating head groove 55 of the same actuating mechanism 5 are located on both sides of the receiving hole 54, so that when the actuating head 52 is actuated, the stroke of the actuating head groove 55 can be increased, and the reliability of the movement of the sliding pin 81 can be increased.

[0021] The sliding pin 81 has push cones 811 at both ends that mate with the shift head grooves 55. Thus, when either shift body 51 rotates relative to the pin shaft 6, it acts on the push cones 811, pushing the sliding pin 81 to slide axially along the sleeve 80. This causes the sliding pin 81 to enter the shift head groove 55 of the other shift body 51, locking the other shift body 51 and sleeve 80 together via the sliding pin 81. The shift body 51 then disengages from the sliding pin 81, releasing the lock. However, when both shift bodies 51 rotate simultaneously, both ends of the sliding pin 81 simultaneously insert into the shift head grooves 55. The sliding pin 81 is limited by the sleeve 80 and the shift head grooves 55 and cannot move, thus preventing the entire dual-screw drive shift actuator from moving. Therefore, when the software control program malfunctions or a human error occurs, activating one set of actuators mechanically prevents the other set from rotating, thus avoiding simultaneous shifting of the gearbox or electric drive axle due to synchronized operation of the two sets of actuators, which could damage the internal structure.

[0022] In this embodiment, the first bearing 3 and the second bearing 4 are respectively installed at both ends of the lead screw 21 in an interference fit manner, and the first bearing 3 and the second bearing 4 are independently clearance fit with the housing.

[0023] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dual-screw drive shift actuator with a shift head position sensing capability, comprising: Two sets of actuators, each set of actuators including a motor (1), a lead screw mechanism (2) and a toggle mechanism (5); the lead screw mechanism (2) includes a lead screw (21) connected to the motor (1) at one end and a lead screw nut (22) that is linearly movable on the lead screw (21); the toggle mechanism (5) includes a toggle body (51) rotatably mounted on the housing via a pin (6), a snap-fit ​​connector (53) formed at one end of the toggle body (51) and cooperating with the lead screw nut (22) for synchronous movement, and a toggle head (52) formed at the other end of the toggle body (51). The locking mechanism (8) includes a sliding sleeve (80) fixed on the housing and a sliding pin (81) movably disposed in the sliding sleeve (80). When one of the actuating bodies (51) rotates about the axis of the pin (6), one of the actuating bodies (51) pushes the sliding pin (81) into the other actuating body (51). The feature is that the actuating mechanism (5) further includes a magnet (56) installed on the side of the actuating body (51). It also includes a sensor (7) installed between the two sets of the actuating mechanisms (5) and cooperating with the magnet (56).

2. The dual-screw drive shifting actuator with a shift head position sense according to claim 1, characterized in that: It also includes a connector (9) that is connected to the sensor (7) via a cable.

3. The dual-screw drive shift actuator with a shift head position sense according to claim 1 or 2, characterized in that: The snap-fit ​​connector (53) has a clearance groove (531) for the lead screw (21) to pass through; at least one limiting protrusion (221) is formed on the circumferential surface of the lead screw nut (22), and at least one limiting groove (532) corresponding to the limiting protrusion (221) is provided on the snap-fit ​​connector (53).

4. The dual-screw drive shift actuator with a shift head position sense according to claim 1 or 2, characterized in that: The actuating body (51) has a receiving hole (54) on its side, and the pin (6) passes through the receiving hole (54) with a clearance fit.

5. The dual-screw drive shift actuator with throttle position sensing according to claim 1, characterized in that: The two actuating bodies (51) have a dial groove (55) on their opposite sides, and the two ends of the sliding pin (81) have push cones (811) that cooperate with the dial groove (55).

6. The dual-screw drive shift actuator with responsive shifter position according to claim 4, characterized in that: The dial (52) and the dial groove (55) of the same actuating mechanism (5) are located on both sides of the receiving hole (54).

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