Automatic mechanical transmission and vehicle

Abstract

The utility model discloses an automatic mechanical transmission and a vehicle. A bearing seat is arranged in a clutch shell; a shaft penetrates through the clutch shell and the bearing seat; the bearing is assembled on a shaft in an interference manner; a bearing cover is arranged above the bearing, a through hole is formed in the bearing cover, and a shaft penetrates through the through hole of the bearing cover; the bearing cover is arranged below the bearing seat; the first shaft is sleeved with a sealing ring, and the sealing ring is assembled on the bearing cover in an interference mode. A tachometer wheel is arranged on the bearing seat and connected to a shaft in a rolling mode. The rotating speed sensor can be prevented from adsorbing scrap iron in oil, and therefore the problem that the rotating speed sensor fails due to the scrap iron is solved. The sealing ring can prevent oil from entering the clutch shell. And the tachometer wheel is fixed at one end of a shaft in the clutch shell, so that the tachometer wheel is prevented from being in contact with oil. The rotating speed sensor is not in direct contact with the oil liquid, so that the influence of scrap iron in the oil liquid on signals is eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmissions, and in particular relates to an automatic mechanical transmission and a vehicle. Background Art

[0002] The AMT (automatic mechanical transmission) speed sensor is a very important component of the AMT electronic control system. It is used to measure the speed of the input and output shafts of the transmission and is a key signal for judging the starting and shifting process of the AMT. At present, the speed sensor is a Hall-type speed sensor with a magnet on the head. The speed sensor is installed at the corresponding position of the transmission speed wheel. The gap between the sensor head and the speed wheel is 1mm. When the speed wheel rotates, the speed sensor detects the corresponding pulse signal and sends the speed signal to the TCU. The speed wheel is generally arranged inside the transmission and immersed in the transmission lubricating oil. When it rotates at high speed, the oil iron filings will be thrown onto the speed sensor, and the magnetic part of the speed sensor will absorb the iron filings in the oil. After long-term operation, the iron filings will accumulate to a certain extent, which will cause the sensor signal to jump, causing the transmission shifting and starting failures.

[0003] The current technology for dealing with failures caused by iron chips accumulation in speed sensors is to design a magnetic speed sensor anti-iron chip adsorption device that can wrap the side of the speed sensor head. This treatment solution has high requirements on the cleanliness of the gearbox lubricating oil. When there are more iron chips in the oil, the speed sensor signal measurement will still be interfered by the iron chips, resulting in poor measurement accuracy.

[0004] The patent publication number is CN205608017U, and the name is a patent application for a simple vehicle speed detection system, which includes a tachometer wheel mounted on the output drive shaft of the automobile gearbox, a sensor bracket fixed on the gearbox, and a gear speed sensor mounted on the sensor bracket and facing the tachometer wheel. The gear speed sensor senses the tachometer wheel to generate a pulse signal and transmits the measured pulse signal to the controller in real time. Utility Model Content

[0005] In order to overcome the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide an automatic mechanical transmission and a vehicle, which can eliminate the influence of oil and iron filings and improve the reliability of the AMT by isolating the speed sensor and the speed measuring wheel outside the oil chamber.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An automatic mechanical transmission, comprising:

[0008] A clutch housing, wherein a bearing seat is arranged inside the clutch housing;

[0009] a shaft, the shaft passing through the clutch housing and the bearing seat;

[0010] A bearing, wherein the bearing is interference fitted on the one shaft;

[0011] A bearing cover is arranged above the bearing, a through hole is opened on the bearing cover, and the shaft passes through the through hole of the bearing cover; the bearing cover is arranged below the bearing seat; a sealing ring is sleeved on the shaft, and the sealing ring is interference fitted on the bearing cover; a tachometer wheel is arranged on the bearing seat, and the tachometer wheel is rollingly connected to the shaft.

[0012] Optionally, a top step is provided on the top inner wall of the bearing cover, and the outer wall of the sealing ring is engaged with the inner wall of the top step of the bearing cover.

[0013] Optionally, the bottom of the clutch housing is connected to a transmission housing.

[0014] Optionally, the bottom of the bearing cover is fixedly connected to the transmission housing via a first bolt.

[0015] Optionally, a slot is provided on the side of the bearing, a retaining ring is arranged in the slot, a bottom step is provided on the bottom inner wall of the bearing cover, and the outer side of the retaining ring is engaged with the bottom step of the bearing cover.

[0016] Optionally, a first retaining ring is provided on the top of the bearing, and the first retaining ring is sleeved on the shaft.

[0017] Optionally, a second retaining ring is respectively provided on the top and the bottom of the speed measuring wheel, and the second retaining ring is sleeved on the shaft.

[0018] Optionally, a rotation speed sensor is arranged on the side wall of the bearing seat, and the end of the rotation speed sensor faces the speed measuring wheel.

[0019] Optionally, the bearing cover is a hollow frustum without a bottom surface.

[0020] A vehicle comprises the automatic mechanical transmission.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model can prevent the speed sensor from absorbing iron filings in the oil, thereby eliminating the problem of the speed sensor failing due to iron filings. The transmission housing of the utility model contains transmission oil. After the parts are assembled, the sealing ring can prevent the oil from entering the clutch housing. The speed wheel is fixed to one end of an axis inside the clutch housing to avoid contact with the oil. The speed sensor is arranged on the bearing seat inside the clutch housing to directly collect the pulse signal of the speed wheel without directly contacting the oil, thereby eliminating the influence of iron filings in the oil on the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] 1. Axle 2. Bearing 3. First retaining ring 4. Circlip 5. Bearing cover 6. First bolt 7. Speed ​​sensor 8. Screw 9. Second retaining ring 10. Bearing seat 11. Speed ​​wheel 12. Second bolt 13. Third bolt 14. Clutch housing 15. Sealing ring 16. Transmission housing. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 should fall within the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The utility model is described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1As shown, an automatic mechanical transmission of the utility model includes: a shaft 1, a bearing 2, a first retaining ring 3, a retaining ring 4, a bearing cover 5, a first bolt 6, a speed sensor 7, a screw 8, a second retaining ring 9, a bearing seat 10, a speed measuring wheel 11, a second bolt 12, a third bolt 13, a clutch housing 14, a sealing ring 15, and a transmission housing 16.

[0031] The bottom of the clutch housing 14 is connected to the top of the transmission housing 16 by a third bolt 13. The connection between the clutch housing 14 and the transmission housing 16 has a cavity, and the bearing cover 5 is arranged in the cavity. The bearing cover 5 is a hollow truncated cone without a bottom surface, and the bottom of the bearing cover 5 is fixedly connected to the top of the transmission housing 16 by a first bolt 6. The transmission housing 16 has oil in it.

[0032] The bearing 2 is interference-fitted on the shaft 1 , a through hole is provided on the top of the transmission housing 16 , and two sides of the bearing 2 are fixed in the through holes on the top of the transmission housing 16 .

[0033] A slot is provided on the side of the bearing 2, a retaining ring 4 is provided in the slot, a bottom step is provided on the bottom inner wall of the bearing cover 5, and the outer side of the retaining ring 4 is engaged with the bottom step of the bearing cover 5. A first retaining ring 3 is provided on the top of the bearing 2, and the first retaining ring 3 is sleeved on the shaft 1.

[0034] The bearing seat 10 is fixed on the bottom surface of the clutch housing 14 by a second bolt 12 , and the shaft 1 passes through the clutch housing 14 and the bearing seat 10 .

[0035] The bearing cover 5 is arranged above the bearing 2, and a through hole is opened on the bearing cover 5, and the shaft 1 passes through the through hole of the bearing cover 5; the bearing cover 5 is arranged below the bearing seat 10; a sealing ring 15 is sleeved on the shaft 1, and the top of the sealing ring 15 is connected to the bottom of the through hole of the bearing cover 5, and a top step is opened on the top inner wall of the bearing cover 5, and the outer wall of the sealing ring 15 is embedded with the inner wall of the top step of the bearing cover 5, and the sealing ring 15 is interference fitted in the through hole of the bearing cover 5.

[0036] The bearing seat 10 is provided with a speed measuring wheel 11, and the speed measuring wheel 11 is rollingly connected to the shaft 1. The top and bottom of the speed measuring wheel 11 are respectively provided with a second snap ring 9, and the second snap ring 9 is sleeved on the shaft 1.

[0037] A rotation speed sensor 7 is disposed on the side wall of the bearing seat 10, and the end of the rotation speed sensor 7 faces the speed measuring wheel 11. The rotation speed sensor 7 is fixed to the bearing seat 10 by screws 8.

[0038] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An automatic mechanical transmission, characterized in that: include: A clutch housing (14), wherein a bearing seat (10) is arranged inside the clutch housing (14); a shaft (1), the shaft (1) passing through the clutch housing (14) and the bearing seat (10); A bearing (2), wherein the bearing (2) is interference-fitted on the shaft (1); A bearing cover (5) is arranged above the bearing (2), a through hole is opened on the bearing cover (5), and the shaft (1) passes through the through hole of the bearing cover (5); the bearing cover (5) is arranged below the bearing seat (10); a sealing ring (15) is sleeved on the shaft (1), and the sealing ring (15) is interference-fitted on the bearing cover (5); a speed measuring wheel (11) is arranged on the bearing seat (10), and the speed measuring wheel (11) is rollingly connected to the shaft (1).

2. An automatic mechanical transmission according to claim 1, characterized in that: The top inner wall of the bearing cover (5) is provided with a top step, and the outer wall of the sealing ring (15) is fitted into the inner wall of the top step of the bearing cover (5).

3. An automatic mechanical transmission according to claim 1, characterized in that: The bottom of the clutch housing (14) is connected to a transmission housing (16).

4. An automatic mechanical transmission according to claim 3, characterized in that: The bottom of the bearing cover (5) is fixedly connected to the transmission housing (16) via a first bolt (6).

5. An automatic mechanical transmission according to claim 1, characterized in that: A slot is provided on the side of the bearing (2), a retaining ring (4) is arranged in the slot, a bottom step is provided on the bottom inner wall of the bearing cover (5), and the outer side of the retaining ring (4) is engaged with the bottom step of the bearing cover (5).

6. An automatic mechanical transmission according to claim 1, characterized in that: A first retaining ring (3) is provided on the top of the bearing (2), and the first retaining ring (3) is sleeved on the shaft (1).

7. An automatic mechanical transmission according to claim 1, characterized in that: A second snap ring (9) is respectively provided at the top and the bottom of the speed measuring wheel (11), and the second snap ring (9) is sleeved on the shaft (1).

8. An automatic mechanical transmission according to claim 1, characterized in that: A rotation speed sensor (7) is arranged on the side wall of the bearing seat (10), and the end of the rotation speed sensor (7) faces the speed measuring wheel (11).

9. An automatic mechanical transmission according to claim 1, characterized in that: The bearing cover (5) is a hollow truncated cone without a bottom surface.

10. A vehicle, characterized in that: An automatic mechanical transmission comprising any one of claims 1 to 9.

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