A new shift knob

Abstract

The present application relates to a new type of gear shifter, comprising a gear shifter housing connected with a speed reducer, a ball screw, a Z-shaped rotating shaft assembly, an angle sensor and a gear shifting motor are fixed in the gear shifter housing; the ball screw is fixed at both ends of the gear shifter housing through ball bearings; the gear shifter housing is also provided with a gear shifting fork, one end of the gear shifting fork is connected with a speed reducer synchronizer gear sleeve, the other end is fixed on the ball screw nut, the Z-shaped rotating shaft head moves with the gear shifting fork to generate an angle, the other end is connected with the angle sensor to transfer the required 40° gear shifting angle. The present application realizes gear shifting by driving the ball screw to move axially by the motor, recognizes the gear shifting lever position by the angle sensor, realizes the required gear shifting stroke by the signal communication between the angle sensor and the driving motor when reaching the gear shifting position, can effectively overcome the shortcomings of the existing two gear shifters; the new type of gear shifter is simple, efficient and reliable, can realize correct high-precision gear shifting of the two-gear speed reducer; the gear shifter has compact structure and low cost.

Description

Technical Field

[0001] This invention belongs to the field of new energy electric vehicle technology, and specifically relates to a novel gear shifter. Background Technology

[0002] With the development of new energy electric vehicle technology, two-speed reducers can simultaneously take into account the power and economy of the vehicle and can appropriately reduce the maximum reduction requirements of the car motor, becoming increasingly popular. As a result, gear shifters suitable for them have also emerged.

[0003] There are two main types of shifters for existing two-speed reducers. One type is a worm gear structure, as shown in [the image / description]. Figure 1 As shown, it suffers from drawbacks such as high noise, complex mechanism, and heavy weight. It also exhibits technical defects such as insufficient precision in shift control, including overtravel. Secondly, while both use motor-driven ball screw shifting, they rely on limit rings for shifting limits, resulting in impacts during shifting and a tendency for over- or under-shifting, thus failing to achieve precise shifting control. (See...) Figure 2 As shown.

[0004] Therefore, there is an urgent need to develop a new type of gear shifter to achieve correct gear shifting in a two-speed reducer, so as to effectively solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a simple, efficient and reliable new type of gear shifter to solve the problem of high-precision gear shift control.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A novel gear shifter includes a gear shifter housing, within which a ball screw, a Z-shaped shaft assembly, a rotation angle sensor, and a gear shifter motor are fixed.

[0008] The shifter housing is connected to the reducer, and an opening is located on the left side of the shifter housing. The ball screw is fixed to the shifter housing at both ends via ball bearings, converting the rotational motion of the shift motor into linear motion. The shifter housing also houses a shift fork; one end of the shift fork is connected to the reducer synchronizer sleeve, providing shift stroke and shift force, while the other end is fixed to the ball screw nut. The head of the shift fork has a straight groove for the Z-shaped shaft head of the Z-shaped shaft assembly to slide within. The Z-shaped shaft head moves with the shift fork, generating an angle, and the other end engages with an angle sensor to transmit the required 40° shift angle. The angle sensor communicates externally with the vehicle's MCU, coordinating with the shift motor to complete the shift function. The shift motor shaft is connected to the ball screw, and its external wiring harness interfaces with the vehicle's MCU, providing rotational torque and speed, which are converted into shift force, shift stroke, and shift time via the ball screw.

[0009] Furthermore, the gear shift mechanism housing is connected to the reducer by bolts.

[0010] Furthermore, the gear shift mechanism housing has an opening on the left side for disassembling internal parts, and the opening is sealed with a bowl-shaped plug.

[0011] Furthermore, the top of the gear shift mechanism housing has an opening, and a vent plug is installed at the opening.

[0012] Furthermore, the end of the shift fork is fixed to the nut of the ball screw by bolts, and the shift fork has a through hole in the middle, which is clearance fit with the ball screw.

[0013] Furthermore, the angle sensor is connected to the gear shift mechanism housing by bolts and installed in a fixed position.

[0014] Furthermore, the rectangular interface inside the corner sensor is snapped into the Z-shaped shaft of the Z-shaped shaft assembly, and externally it communicates with the vehicle MCU through the sensor interface to work with the shift motor to complete the shifting function.

[0015] Furthermore, the Z-type rotating shaft assembly also includes an angle rotating arm and a hollow limiting bushing. The angle rotating arm is fitted onto the hollow limiting bushing, which is installed on the shifter housing and fixed with a gasket and a shaft elastic retaining ring. An O-ring seal prevents oil leakage.

[0016] Furthermore, the shift motor is bolted to the flange surface of the shifter housing.

[0017] Furthermore, a bushing is provided on the outside of the ball bearing at the connection between the shift motor shaft and the ball screw.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention relates to a novel gear shifter that achieves gear shifting by axially moving a ball screw driven by a motor. The position of the gear shift lever is identified by an angle sensor. When the shift position is reached, the required shift stroke is achieved through signal communication between the angle sensor and the drive motor. This effectively overcomes the shortcomings of the two existing gear shifters. The new gear shifter is simple, efficient, and reliable, and can achieve accurate shifting of two-speed reducers. The gear shifter has a compact structure and low cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 Schematic diagram of a worm gear shifter;

[0022] Figure 2 A schematic diagram of an existing ball screw shifter;

[0023] Figure 3 Schematic diagram of the gear shifter assembly;

[0024] Figure 4 Schematic diagram of the Z-type rotating shaft assembly. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments:

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0027] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] like Figure 3 As shown, the novel gear shifter of the present invention includes a gear shifter housing, in which a ball screw, a Z-shaped shaft assembly, a rotation angle sensor and a gear shifting motor are fixed.

[0029] The shifter housing is connected to the reducer by bolts. An opening is located on the left side of the shifter housing for disassembling internal parts; this opening is sealed with a cup-shaped plug. The top of the shifter housing is open and fitted with a vent plug. The shifter housing is designed to be compact, small in size, and high in strength.

[0030] The ball screw has a ball bearing at each end, which is fixed to the gear shifter housing to convert the rotational motion of the gear shifter motor into linear motion.

[0031] The shifter housing also includes a shift fork. One end of the shift fork is connected to the synchronizer sleeve of the reducer, providing shift stroke and shift force. The other end is bolted to the nut of the ball screw, with a through hole in the middle, providing clearance fit with the ball screw, thus not affecting the operation of the ball screw assembly. The head of the shift fork has a straight groove for the Z-shaped shaft head of the Z-shaped shaft assembly to slide within.

[0032] The Z-shaped rotating shaft head generates an angle as the shift fork moves, and the other end is engaged with the angle sensor to transmit the required 40° shift angle.

[0033] The angle sensor is bolted to the gear shift mechanism housing and installed in a fixed position. The internal rectangular interface is snapped into the Z-shaped shaft of the Z-shaped shaft assembly, and the external interface communicates with the vehicle's MCU to work with the gear shift motor to complete the gear shifting function.

[0034] The Z-type rotating shaft assembly also includes an angle rotating arm and a hollow limiting bushing. The angle rotating arm is fitted onto the hollow limiting bushing, which is installed on the shifter housing and fixed with a gasket and a shaft elastic retaining ring. An O-ring seal prevents oil leakage.

[0035] The shift motor is bolted to the flange of the shifter housing, and its shaft is connected to a ball screw. A bushing is provided at the connection point outside the ball bearing. The external wiring harness interfaces with the vehicle's MCU, providing rotational torque and speed, which are converted into shifting force, shifting stroke, and shifting time via the ball screw.

[0036] Example 1

[0037] A new type of gear shifter mainly consists of a gear shifter housing, a ball screw, a Z-shaped shaft assembly, a rotation angle sensor, and a gear shift motor.

[0038] The ball screw is fitted with a ball bearing at each end, and the ball screw is fixed to the shifter housing via the ball bearings, converting the rotational motion of the shift motor into linear motion. The nut of the ball screw is bolted to one end of the shift fork, and the other end of the shift fork is connected to the synchronizer sleeve of the reducer, providing shift stroke and shift force. The head of the shift fork has a straight groove for the Z-shaped shaft head of the Z-shaped shaft assembly to slide within.

[0039] The Z-shaped pivot assembly consists of a Z-shaped pivot, an angle pivot arm, and a hollow limiting bushing. The Z-shaped pivot head moves with the shift fork, generating an angle, while the other end engages with an angle sensor to transmit the required 40° shift angle. The angle pivot arm is fitted onto the hollow limiting bushing, which is mounted on the shifter housing and secured with gaskets and elastic retaining rings. O-ring seals prevent oil leakage.

[0040] The angle sensor is bolted to the gear shift mechanism housing. Its internal rectangular interface engages with the Z-shaped shaft of the Z-shaped shaft assembly. Externally, it communicates with the vehicle's MCU via a sensor interface, coordinating with the gear shift motor to complete the gear shifting function. In this embodiment, the parameters of the angle sensor are shown in Table 1.

[0041] Table 1

[0042]

[0043] The shift motor is bolted to the flange of the shifter housing, and its shaft is connected to a ball screw. A bushing is provided at the connection point outside the ball bearing. The external wiring harness interfaces with the vehicle's MCU, providing rotational torque and speed, which are converted into shifting force, shifting stroke, and shifting time via the ball screw. In this embodiment, the parameters of the shift motor are shown in Table 2.

[0044] Table 2

[0045]

[0046] The gear shift mechanism housing is connected to the reducer by bolts. An opening is located on the left side of the gear shift mechanism housing for disassembling internal parts; this opening is sealed with a cup-shaped plug. The top of the gear shift mechanism housing is open and fitted with a vent plug.

[0047] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A novel gear shifter, characterized in that: The system includes a shifter housing, within which a ball screw, a Z-type shaft assembly, a rotation angle sensor, and a shifter motor are fixed. The shifter housing is connected to the reducer, and an opening is located on the left side of the shifter housing. The ball screw is fixed to the shifter housing at both ends via ball bearings, converting the rotational motion of the shift motor into linear motion. The shifter housing also contains a shift fork; one end of the shift fork is connected to the reducer synchronizer sleeve, providing shift stroke and shift force, while the other end is fixed to the ball screw nut. The head of the shift fork has a straight groove for the Z-shaped shaft head of the Z-shaped shaft assembly to slide within. The Z-shaped shaft head moves with the shift fork, generating an angle, and the other end engages with an angle sensor to transmit the required 40° shift angle. The angle sensor communicates externally with the vehicle's MCU, coordinating with the shift motor to complete the shift function. The shift motor shaft is connected to the ball screw, and the external wiring harness interfaces with the vehicle's MCU, providing rotational torque and speed, which are converted into shift force, shift stroke, and shift time via the ball screw. The rectangular interface inside the angle sensor is snapped into the Z-shaped shaft of the Z-shaped shaft assembly, and communicates with the vehicle MCU externally through the sensor interface to work with the shift motor to complete the shifting function. The Z-shaped shaft assembly also includes an angle arm and a hollow limiting bushing. The angle arm is fitted onto the hollow limiting bushing, which is installed on the shifter housing and fixed with a gasket and a shaft elastic retaining ring. An O-ring seal prevents oil leakage.

2. The novel gear shifter according to claim 1, characterized in that: The gear shifter housing is connected to the reducer by bolts.

3. The novel gear shifter according to claim 1, characterized in that: The gear shifter housing has an opening on the left side for disassembling internal parts, and the opening is sealed with a bowl-shaped plug.

4. A novel gear shifter according to claim 1, characterized in that: The top of the shifter housing has an opening, and a vent plug is installed at the opening.

5. A novel gear shifter according to claim 1, characterized in that: The shift fork is fixed to the nut of the ball screw by bolts. The shift fork has a through hole in the middle and is clearance-fitted with the ball screw.

6. A novel gear shifter according to claim 1, characterized in that: The angle sensor is connected to the gear shift mechanism housing by bolts and installed in a fixed position.

7. A novel gear shifter according to claim 1, characterized in that: The shift motor is bolted to the flange surface of the shifter housing.

8. A novel gear shifter according to claim 1, characterized in that: The connection between the shift motor shaft and the ball screw has a bushing on the outside of the ball bearing.

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