Novel parking mechanism new energy speed reducer

Abstract

The invention belongs to the technical field of speed reducers, and particularly discloses a novel parking mechanism new energy speed reducer which comprises a speed reducer body and a parking mechanism. The parking mechanism comprises a driving piece, a gear shifting fork assembly and a clamping assembly. The clamping assembly comprises a driving tooth and a driven tooth, the driving tooth is installed on the input shaft assembly and rotates along with the input shaft assembly, and the driving tooth can move in the axial direction; the driven gear is fixed in the speed reducer end shell; the driving teeth and the driven teeth are provided with teeth; the gear shifting fork assembly comprises a shifting fork, a shifting fork rod and a pre-tightening spring, a mounting groove is formed in the driving tooth, the shifting fork is mounted in the mounting groove, the shifting fork rod is fixed to the shifting fork, and the shifting fork rod is in sliding connection with the motor end shell or the speed reducer end shell; the shifting fork rod is sleeved with the pre-tightening spring. The driving piece is used for axially driving the shifting fork rod to move. The parking mechanism is adopted for parking, mechanical parking can be achieved, and the problem that the braking effect is attenuated due to the fact that an electronic hand brake is adopted for parking is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of reducers, and in particular relates to a new type of parking mechanism new energy reducer. Background Art

[0002] As the popularity of new energy vehicles increases, the safety requirements for new energy vehicles are getting higher and higher. Since new energy vehicles are equipped with relatively large batteries, the weight of the entire vehicle is increased. For parking on certain steep slopes, if you only rely on the electronic handbrake, the attenuation of the electronic handbrake is inevitable as the number of uses increases. And in scenarios where there is a need for long-term parking, if you only use the electronic handbrake, there will be attenuation of the electronic handbrake, which may cause parking failure and cause safety accidents. Summary of the invention

[0003] The purpose of the present invention is to provide a new type of parking mechanism new energy reducer, which can achieve mechanical parking by eliminating the ratchet pawl or cam structure in the traditional sense and setting a parking mechanism, and the braking effect will not be attenuated due to the increase in the number of uses.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a new type of parking mechanism new energy reducer, including a reducer body and a parking mechanism, the reducer body including an input shaft assembly, an intermediate shaft assembly, a differential assembly, a motor end housing and a reducer end housing, the motor end housing is fixed to the reducer end housing, the input shaft assembly, the intermediate shaft assembly and the differential assembly are located inside the motor end housing and the reducer end housing, and both sides of the three are rotatably connected to the motor end housing and the reducer end housing; the input shaft assembly is connected to the input drive member, and the intermediate shaft assembly cooperates with the input shaft assembly and the differential assembly respectively to realize torque transmission; the parking mechanism includes a drive member, a shift fork assembly and a clamping assembly; the drive member is installed on the motor end housing or the reducer end housing, and the clamping assembly The gear shift fork assembly comprises a driving tooth and a passive tooth, wherein the driving tooth is mounted on an input shaft assembly, an intermediate shaft assembly or a differential assembly and rotates with the same, and the driving tooth can move axially; the passive tooth is fixed in a motor end housing or a reducer end housing; a tooth capable of engaging is provided on the side where the driving tooth and the passive tooth are close to each other; the shift fork assembly comprises a shift fork, a shift fork rod and a preload spring, the driving tooth is provided with a mounting groove, the shift fork is mounted in the mounting groove, the shift fork rod is fixed to the shift fork, and one side of the shift fork rod is slidably connected to the motor end housing or the reducer end housing; the preload spring is sleeved on the outside of the shift fork rod, and the two sides of the preload spring are respectively against the shift fork and the motor end housing or the reducer end housing; the driving member is used to axially drive the shift fork rod to move.

[0005] Furthermore, the driving member adopts an electromechanical structure, an electromagnetic structure or a hydraulic structure.

[0006] Furthermore, a spline is provided inside the driving tooth, and the driving tooth is connected to the spline on the input shaft assembly, the intermediate shaft assembly or the differential assembly through the spline.

[0007] Furthermore, positioning holes are respectively provided on the motor end housing and the reducer end housing, and the driving end and the shift fork rod of the driving member are respectively installed in the positioning holes.

[0008] Furthermore, the driving member is installed outside the motor end housing or the reducer end housing.

[0009] Furthermore, the driving end of the driving member passes through the motor end housing or the reducer end housing and enters into the motor end housing or the reducer end housing, and the driving end of the driving member is opposite to the shift fork, and the driving end of the driving member can push the shift fork rod to move axially.

[0010] The working principle of the technical solution is that when parking, the driving end of the driving member retracts and no longer applies thrust to the fork rod. Under the action of the preload spring, the fork rod moves axially, the fork rod drives the fork to move axially, the fork drives the active gear to move axially, the active gear approaches the passive gear, and the active gear continues to move axially. When the teeth of the active gear are stuck in the tooth grooves of the passive gear, since the passive gear is fixed in the reducer end housing or the motor end housing, the active gear cannot rotate at this time. The active gear is installed on the input shaft assembly, the intermediate shaft assembly or the differential assembly through a spline, and the input shaft assembly, the intermediate shaft assembly or the differential assembly cannot rotate; since the input shaft assembly and the half shaft of the whole vehicle are fixedly connected through gears, the half shaft of the whole vehicle cannot rotate, and the whole vehicle realizes the parking function.

[0011] Since there is a tooth-to-tooth situation between the driving gear and the passive gear, after the driving end of the driving member retracts, the preload spring continues to apply axial force to the fork rod. Since the half-axle of the whole vehicle is not locked at this time, the whole vehicle will continue to roll. After rolling a certain angle, the driving gear is stuck in the passive gear under the action of the axial force applied by the preload spring, thereby realizing the parking function.

[0012] When releasing the parking brake, the driving end of the driving member extends out, and the driving end of the driving member pushes the shift fork rod to move axially. The shift fork rod drives the active gear to move axially through the shift fork, and moves the active gear out from the passive gear to realize the function of releasing the parking brake.

[0013] The beneficial effects of this technical solution are:

[0014] ① In this technical solution, a parking mechanism is used for parking, which can realize mechanical parking and avoid the problem of attenuated braking effect caused by using an electronic handbrake for parking.

[0015] ② In this technical solution, a preload spring is installed on the shift fork rod to ensure that when the active teeth and the passive teeth are at the top of each other, the parking function can still be achieved even if the drive structure is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the external structure of a new type of parking mechanism new energy reducer of the present invention;

[0017] Figure 2 for Figure 1 Exploded diagram of

[0018] Figure 3 for Figure 2 Schematic diagram of the structure of the central parking mechanism. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The figure marks in the drawings of the specification include: input shaft assembly 1, intermediate shaft assembly 2, differential assembly 3, motor end housing 4, reducer end housing 5, first bolt 6, driving member 7, active tooth 8, passive tooth 9, tooth 10, shift fork 11, shift fork rod 12, preload spring 13, mounting groove 14, second bolt 15, valve core 16.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The embodiment is basically as shown in the attached Figure 1-3 As shown: a new type of parking mechanism new energy reducer, including a reducer body and a parking mechanism, the reducer body includes an input shaft assembly 1, an intermediate shaft assembly 2, a differential assembly 3, a motor end housing 4 and a reducer end housing 5, the motor end housing 4 and the reducer end housing 5 are fixed by a first bolt 6, the input shaft assembly 1, the intermediate shaft assembly 2 and the differential assembly 3 are located inside the motor end housing 4 and the reducer end housing 5, and both sides of the three are rotatably connected to the motor end housing 4 and the reducer end housing 5; the input shaft assembly 1, the intermediate shaft assembly 2 or the differential assembly 3 is connected to the input drive 7, and the intermediate shaft assembly 2 cooperates with the input shaft assembly 1 and the differential assembly 3 to realize torque transmission.

[0023] The parking mechanism includes a driving member 7, a shift fork assembly and a clamping assembly; the driving member 7 is mounted on the motor end housing 4 or the reducer end housing 5, and the driving member 7 adopts an electromechanical structure, an electromagnetic structure or a hydraulic structure. The clamping assembly includes an active tooth 8 and a passive tooth 9, the active tooth 8 is mounted on the input shaft assembly 1, the intermediate shaft assembly 2 or the differential assembly 3 and rotates with it, and the active tooth 8 can move axially, specifically, a spline is provided inside the active tooth 8, and the active tooth 8 is connected to the spline on the input shaft 1 of the input shaft assembly, the intermediate shaft of the intermediate shaft assembly 2 or the output shaft of the differential assembly 3 through a spline. The passive tooth 9 is fixed in the motor end housing 4 or the reducer end housing 5 (it can be fixed by bolts or by precasting); the side where the active tooth 8 and the passive tooth 9 are close to each other is provided with a plurality of teeth 10 that can be clamped with each other. The shift fork assembly includes a shift fork 11, a shift fork rod 12 and a preload spring 13. A mounting groove 14 is provided on the active tooth 8. The shift fork 11 is installed in the mounting groove 14. The shift fork rod 12 is fixed to the shift fork 11. One side of the shift fork rod 12 is slidably connected to the motor end housing 4 or the reducer end housing 5, and the other side is directly opposite to the driving end of the driving member 7. The preload spring 13 is sleeved on the outside of the shift fork rod 12, and the two sides of the preload spring 13 are respectively against the shift fork 11 and the motor end housing 4 or the reducer end housing 5; the driving member 7 is used to axially drive the shift fork rod 12 to move. Positioning holes are respectively provided on the motor end housing 4 and the reducer end housing 5. The driving end of the driving member 7 and the shift fork rod 12 are respectively installed in the positioning holes, and the driving end of the driving member 7 and the shift fork rod 12 can slide in the positioning holes. The driving member 7 is installed on the outside of the motor end housing 4 or the reducer end housing 5. The driving end of the driving member 7 passes through the motor end housing 4 or the reducer end housing 5 and enters the motor end housing 4 or the reducer end housing 5. The driving end of the driving member 7 is opposite to the fork 11, and the driving end of the driving member 7 can push the fork rod 12 to move axially.

[0024] In this embodiment, the passive tooth 9 is fixed to the reducer end housing 5 by a second bolt 15. The driving member 7 adopts an electromagnetic structure, and the electromagnetic structure includes a solenoid valve, which is installed on the outside of the reducer end housing 5. The reducer end housing 5 is provided with a first positioning hole, and the valve core 16 of the solenoid valve is slidably connected to the first positioning hole. After passing through the first positioning hole, the valve core 16 of the solenoid valve is opposite to the fork rod 12. The active tooth 8 is installed on the input shaft of the input shaft assembly 1, and the active tooth 8 is spline-connected with the spline on the input shaft, so that the active tooth 8 can perform a certain axial movement relative to the input shaft, and can also rotate with the input shaft. A second positioning hole is provided on the motor end housing 4, and the side of the fork rod 12 away from the valve core 16 is slidably connected in the second positioning hole.

[0025] The specific implementation process is as follows:

[0026] When parking, the driving end of the driving member 7 retracts (the solenoid valve is powered off), and no thrust is applied to the fork rod 12. Under the action of the preload spring 13, the fork rod 12 moves axially, and the fork rod 12 drives the fork 11 to move axially, and the fork 11 drives the active tooth 8 to move axially, and the active tooth 8 approaches the passive tooth 9, and the active tooth 8 continues to move axially. When the tooth 10 of the active tooth 8 is stuck in the tooth groove of the passive tooth 9, since the passive tooth 9 is fixed in the reducer end housing 5, the active tooth 8 cannot rotate at this time. The active tooth 8 is installed on the input shaft of the input shaft assembly 1 through a spline, and the input shaft assembly 1 cannot rotate; since the input shaft assembly 1 is fixedly connected to the half shaft of the whole vehicle through gears, the half shaft of the whole vehicle cannot rotate, and the whole vehicle realizes the parking function.

[0027] Since there is a situation where teeth 10 face each other between the active tooth 8 and the passive tooth 9, after the driving end of the driving member 7 retracts, the preload spring 13 continues to apply axial force to the fork rod 12. Since the half-axle of the whole vehicle is not locked at this time, the whole vehicle will continue to roll. After rolling a certain angle, the active tooth 8 is clamped into the passive tooth 9 wheel under the action of the axial force applied by the preload spring 13, thereby realizing the parking function.

[0028] When releasing the parking brake, the driving end of the driving member 7 extends (the solenoid valve is energized), and the driving end of the driving member 7 pushes the fork rod 12 to move axially. The fork rod 12 drives the active tooth 8 to move axially through the fork 11, and moves the active tooth 8 out from the passive tooth 9, thereby realizing the function of releasing the parking brake.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A new type of parking mechanism new energy reducer, characterized by: The invention comprises a reducer body and a parking mechanism, wherein the reducer body comprises an input shaft assembly (1), an intermediate shaft assembly (2), a differential assembly (3), a motor end housing (4) and a reducer end housing (5), wherein the motor end housing (4) is fixed to the reducer end housing (5), and the input shaft assembly (1), the intermediate shaft assembly (2) and the differential assembly (3) are located inside the motor end housing (4) and the reducer end housing (5), and both sides of the three are connected to the motor end housing (4) and the reducer end housing (5) to rotate. The input shaft assembly (1) is connected to the input drive member (7), and the intermediate shaft assembly (2) cooperates with the input shaft assembly (1) and the differential assembly (3) to realize torque transmission; the parking mechanism comprises a drive member (7), a shift fork (11) assembly and a clamping assembly; the drive member (7) is mounted on the motor end housing (4) or the reducer end housing (5), and the clamping assembly comprises a driving tooth (8) and a driven tooth (9), and the driving tooth (8) is mounted on the input shaft assembly (1), the intermediate shaft assembly (2) and the differential assembly (3) to realize torque transmission; the parking mechanism comprises a drive member (7), a shift fork (11) assembly and a clamping assembly; the drive member (7) is mounted on the motor end housing (4) or the reducer end housing (5), and the clamping assembly comprises a driving tooth (8) and a driven tooth (9), and the driving tooth (8) is mounted on the input shaft assembly (1), the intermediate shaft assembly (2) and the differential assembly (3) to realize torque transmission; The invention relates to a gear shift fork (11) assembly, wherein the gear shift fork (11) is mounted on a shaft assembly (2) or a differential assembly (3) and rotates with the same, and the driving tooth (8) is capable of axial movement; the passive tooth (9) is fixed in a motor end housing (4) or a reducer end housing (5); a tooth (10) capable of engaging is provided on a side where the driving tooth (8) and the passive tooth (9) are close to each other; the shift fork (11) assembly comprises a shift fork (11), a shift fork rod (12) and a preload spring (13); the driving tooth (8) is provided with a mounting groove (14); the ... The fork (11) is installed in the installation groove (14), the fork rod (12) is fixed to the fork (11), and one side of the fork rod (12) is slidably connected to the motor end housing (4) or the reducer end housing (5); the preload spring (13) is sleeved on the outside of the fork rod (12), and the two sides of the preload spring (13) are respectively against the fork (11) and the motor end housing (4) or the reducer end housing (5); the driving member (7) is used to axially drive the fork rod (12) to move.

2. According to claim 1, a new type of parking mechanism new energy reducer is characterized by: The driving member (7) adopts an electromechanical structure, an electromagnetic structure or a hydraulic structure.

3. According to claim 1, a new type of parking mechanism new energy reducer is characterized by: The driving tooth (8) is provided with a spline inside, and the driving tooth (8) is connected to the spline on the input shaft assembly (1), the intermediate shaft assembly (2) or the differential assembly (3) via the spline.

4. According to claim 1, a new type of parking mechanism new energy reducer is characterized by: Positioning holes are respectively provided on the motor end housing (4) and the reducer end housing (5), and the driving end of the driving member (7) and the shift fork rod (12) are respectively installed in the positioning holes.

5. According to claim 1, a new type of parking mechanism new energy reducer is characterized by: The driving member (7) is installed outside the motor end housing (4) or the reducer end housing (5).

6. A new type of parking mechanism new energy reducer according to claim 5, characterized in that: The driving end of the driving member (7) passes through the motor end housing (4) or the reducer end housing (5) and enters the motor end housing (4) or the reducer end housing (5). The driving end of the driving member (7) is directly opposite to the shift fork (11). The driving end of the driving member (7) can push the shift fork rod (12) to move axially.

Images