CN215928351U - AMT transmission protection mechanism - Google Patents
AMT transmission protection mechanism Download PDFInfo
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- CN215928351U CN215928351U CN202121412333.7U CN202121412333U CN215928351U CN 215928351 U CN215928351 U CN 215928351U CN 202121412333 U CN202121412333 U CN 202121412333U CN 215928351 U CN215928351 U CN 215928351U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
The utility model discloses an AMT transmission protection mechanism, wherein a front buffer and a rear buffer with elasticity are additionally arranged at the front end and the rear end of a ball screw; a seal member made of an elastic material and capable of sealing a joint portion between the front end of the ball screw and the rear end of the cylinder body is provided. Through the arrangement, the kinetic energy generated when the motor rotor, the motor gear and the nut pair with the gear which are associated with the roller screw rod rotate and the impact kinetic energy of the roller screw rod can be greatly absorbed, and the parts are effectively prevented from being subjected to overload impact, so that the good service performance and the expected service life of the propulsion system can be ensured all the time; meanwhile, splashing lubricating oil can be thoroughly prevented from entering the oil cylinder of the transmission, and scrap iron contained in the lubricating oil is prevented from scratching the cylinder wall of the oil cylinder and the peripheral surface of the piston; and the lubricating oil entering the oil cylinder can be prevented from corroding the ethylene propylene diene monomer rubber ring used on the piston and expanding the ring.
Description
Technical Field
The utility model relates to an AMT transmission protection mechanism, and belongs to the technical field of automobile speed change equipment.
Background
The AMT transmission is provided with a push rod pushed by a motor, the front end of the push rod is provided with an oil cylinder, a piston is arranged in the oil cylinder, the push rod is connected with the piston through a push rod, the piston is pushed by the push rod to push or retreat, so that positive pressure or negative pressure is formed by the oil cylinder, and then the positive pressure or negative pressure formed by the oil cylinder pushes a clutch mechanism to execute on-off tasks.
The push rod is a roller screw rod, a nut pair with a gear is sleeved on the push rod, and the motor pushes the nut pair with the gear to rotate during working, so that the roller screw rod moves axially.
When the roller screw rod moves axially, the stroke of the roller screw rod is automatically controlled by a control system comprising a sensor. Because the clutch operation speed is high, the rotating speed of the motor rotor, the motor gear and the nut pair with the gear on the roller screw rod is also high, so that the rotating part has high rotating kinetic energy. When the stroke of the roller screw rod is in place and the control system controls the motor to stop suddenly, all rotating and moving parts can be impacted by great stopping impact. If the shutdown reaction of the automatic control system is delayed, the motion stroke of the roller screw rod is too large, the related structure is subjected to overload impact, and the service performance and the service life of the components and the structure are inevitably influenced after a long time.
In addition, the problem that the lubricating oil splashed in the transmission shell enters the oil cylinder is to be solved urgently. The lubricating oil in the transmission shell contains ground scrap iron, and after the scrap iron enters the rear end of the oil cylinder along with splashed lubricating oil, the piston in the oil cylinder inevitably causes the scrap iron contained in the lubricating oil to scratch the inner wall of the rear end oil cylinder and the outer peripheral surface of the piston in repeated motion, and meanwhile, the service performance and the service life of the oil cylinder of the transmission and the piston of the oil cylinder are seriously influenced. In addition, the lubricating oil entering the oil cylinder can cause the ethylene propylene diene monomer rubber ring used on the piston to corrode and expand.
SUMMERY OF THE UTILITY MODEL
The technical problems to be solved by the utility model are mainly as follows: all parts in the AMT relevant to the motion stroke of the roller screw rod are repeatedly subjected to overload impact for a long time due to sudden stopping control, and lubricating oil containing iron scraps enters the oil cylinder to cause scratches on the inner wall of the oil cylinder and the outer peripheral surface of the piston, so that the service performance of the AMT is reduced and the service life of the AMT is shortened.
Aiming at the problems, the technical scheme provided by the utility model is as follows:
a kind of AMT speed change gear protective mechanism, it is to install elastic front bumper and back bumper in front of ball screw and rear end additionally; a seal member made of an elastic material and capable of sealing a joint portion between the front end of the ball screw and the rear end of the cylinder body is provided.
Furthermore, the front buffer comprises a front elastic part and a sliding ring, wherein the front elastic part is sleeved on the periphery of the front section of the ball screw, the rear end of the front elastic part is limited backwards, and the sliding ring is arranged at the front end of the front elastic part and sleeved on the periphery of the ball screw; when the forward movement stroke of the ball screw with impact kinetic energy is close to the end point, the slip ring firstly contacts the rear end of the cylinder body of the oil cylinder and forces the front elastic part to compress in the process of the subsequent completion of the movement stroke of the ball screw.
Further, the rear buffer comprises a rear elastic piece arranged at the rear end of the ball screw; when the backward movement stroke of the ball screw with impact kinetic energy approaches the end point, the rear elastic piece firstly contacts a rear seat stop piece arranged on the transmission shell and forces the rear elastic piece to be compressed in the process of the ball screw completing the movement stroke subsequently.
Furthermore, the front buffer also comprises a fixing ring sleeved on the periphery of the ball screw at the rear end of the front elastic part, and the rear end of the front elastic part is limited backwards, namely the rear end of the front elastic part is contacted with the fixing ring; the front elastic piece is a first spring; the front end of the first spring is connected with the sliding ring, and the rear end of the first spring is connected with the fixed ring; the rear elastic piece is a second spring.
Furthermore, the rear buffer also comprises a spring pressing body arranged at the front end of the second spring; the elastic pressing body is cylindrical, a limiting boss is arranged on the periphery of the middle of the elastic pressing body, the rear end of the second spring is sleeved on the periphery of the front end of the elastic pressing body, and the end part of the rear end of the second spring abuts against the front end face of the limiting boss.
Furthermore, the rear buffer also comprises an installation sleeve, and the rear end of the installation sleeve is radially and inwards protruded to form a check ring with a telescopic hole; the front end of the mounting sleeve is sleeved on the periphery of the rear end of the ball screw, the second spring is sleeved in the mounting sleeve, the rear end of the elastic pressing body extends backwards from the telescopic hole of the retainer ring and is exposed out of a section behind the retainer ring, and the rear end face of the limiting boss abuts against the inner side face of the retainer ring; the second spring is pre-compressed according to the set strength; the biasing body has a forward compression stroke.
Furthermore, the sealing element comprises a corrugated pipe made of elastic materials, the corrugated pipe is sleeved at the front end of the ball screw and the rear end of the oil cylinder body of the oil cylinder, the front end of the corrugated pipe is fixed at the periphery of the oil cylinder body and is sealed with the periphery of the oil cylinder body, and the rear end of the corrugated pipe is fixed at the periphery of the ball screw and is sealed with the periphery of the ball screw; the bellows can contract and stretch as the ball screw is pushed into or withdrawn from the cylinder.
Further, AMT derailleur protection mechanism, still including establishing the tight hoop face in the hydro-cylinder body periphery of hydro-cylinder, the front end of bellows has preceding tight hoop, preceding tight hoop tightly overlaps on the tight hoop face in hydro-cylinder body periphery.
Further, AMT derailleur protection mechanism, still including establishing the tight hoop groove in solid fixed ring periphery, the rear end of bellows has back tight hoop, back tight hoop tightly overlaps in the tight hoop groove of solid fixed ring periphery.
Furthermore, the periphery of the front end of the front clamping ring is provided with a circumferential outward pressing edge, the front end of the clamping surface of the periphery of the cylinder body is provided with a front limiting flange which protrudes outwards in the axial direction, the transmission shell at the front end of the corrugated pipe is provided with a radial inward annular rear limiting flange, and the pressing edge of the corrugated pipe is pressed between the front limiting flange and the rear limiting flange.
Has the advantages that:
1. no matter the roller screw rod is compressed when the front elastic part is pushed forwards to the tail end or compressed when the rear elastic part is retracted backwards to the tail end, the kinetic energy generated when the motor rotor, the motor gear and the nut pair with the gear which are associated with the roller screw rod rotate and the impact kinetic energy of the roller screw rod can be greatly absorbed, the overload impact of the parts can be effectively avoided, and the good service performance and the expected service life of the propulsion system can be ensured all the time;
2. the splash lubricating oil can be thoroughly prevented from entering the oil cylinder of the transmission, and scrap iron contained in the lubricating oil is prevented from scratching the cylinder wall of the oil cylinder and the peripheral surface of the piston; meanwhile, the phenomenon that the lubricating oil entering the oil cylinder corrodes the ethylene propylene diene monomer rubber ring used on the piston and expands the ring is avoided.
Drawings
FIG. 1 is an exploded view of the transmission and its ball screw related structure;
FIG. 2 is a schematic cross-sectional view of the front bumper and the ball screw;
FIG. 3 is a schematic cross-sectional view of the rear bumper and the ball screw;
FIG. 4 is a schematic cross-sectional view of the transmission and its ball screw related structure;
FIG. 5 is a schematic cross-sectional view of the structure of the area where the seal is located;
fig. 6 is a schematic cross-sectional view of the cylinder block and its related structure.
In the figure:
1. a ball screw; 2. a front buffer; 3. a rear buffer; 4. an oil cylinder; 5. a cylinder body of the oil cylinder; 6. a slip ring; 7. a rear seat stopper; 8. a fixing ring; 9. a first spring; 10. a second spring; 11. a spring body; 12. a limiting boss; 13. installing a sleeve; 14. a retainer ring; 15. a telescopic hole; 16. a first pin shaft hole; 17. a second pin shaft hole; 18. a pin shaft; 19. a bellows; 20. a tightening surface; 21. a front tension band; 22. a rear tension band; 23. pressing edges; 24. a hoop tightening groove; 25. a front limiting flange; 26. a rear limit flange; 27. a piston; 28. a transmission housing; 29. a top rod; 100. a transmission.
Detailed Description
The utility model is further described with reference to the accompanying drawings in which:
as shown in fig. 1 to 3, a protection mechanism of an AMT transmission is formed by adding a front damper 2 and a rear damper 3 having elasticity to the front end and the rear end of a ball screw 1. A seal member made of an elastic material capable of sealing a joint portion between the front end of the ball screw 1 and the rear end of the cylinder block 5 is provided. The front buffer 2 comprises a front elastic part and a sliding ring, wherein the front elastic part is sleeved on the periphery of the front section of the ball screw 1, the rear end of the front elastic part is limited backwards, and the sliding ring 6 is arranged at the front end of the front elastic part and sleeved on the periphery of the ball screw 1; the rear cushion 3 includes a rear elastic member provided at the rear end of the ball screw 1. When the forward movement stroke of the ball screw 1 with impact kinetic energy is close to the end point, the sliding ring 6 firstly contacts the rear end of the oil cylinder body 5 and forces the front elastic part to compress in the process of the subsequent completion of the movement stroke of the ball screw 1. When the backward movement stroke of the ball screw 1 with impact energy approaches the end point, the rear elastic member first contacts the rear seat stopper 7 provided in the transmission case 28 and is forced to be compressed during the subsequent completion of the movement stroke of the ball screw 1. Therefore, no matter the roller screw rod is compressed when the front elastic part is pushed forwards to the tail end or the rear elastic part is compressed when the roller screw rod is retracted backwards to the tail end, the kinetic energy generated when the motor rotor, the motor gear and the nut pair with the gear which are associated with the roller screw rod rotate and the impact kinetic energy of the roller screw rod can be absorbed in a large amount, the parts are effectively prevented from being subjected to overload impact, and the good service performance and the expected service life of the propulsion system can be ensured all the time. Meanwhile, a sealing element capable of sealing the joint part is arranged at the joint part between the front end of the ball screw 1 and the rear end of the oil cylinder body 5, so that splashing lubricating oil can be thoroughly prevented from entering the oil cylinder of the transmission 100, scrap iron contained in the lubricating oil is prevented from scratching the cylinder wall of the oil cylinder 4 and the outer peripheral surface of the piston, and the lubricating oil entering the oil cylinder can be prevented from corroding the ethylene propylene diene monomer rubber ring used on the piston and expanding the ring to be larger.
The front buffer 2 also comprises a fixing ring 8 sleeved on the periphery of the ball screw 1 at the rear end of the front elastic part, and the rear end of the front elastic part is limited backwards, namely the rear end of the front elastic part is contacted with the fixing ring 8; the front elastic piece is a first spring 9; the front end of the first spring 9 is connected with the sliding ring 6, and the rear end of the first spring is connected with the fixing ring 8. Thus, the first spring 9 and the slip ring 6 can be limited to a fixed interval on the ball screw 1.
The rear elastic piece is a second spring 10.
The rear buffer 3 also comprises a spring pressing body 11 arranged at the front end of the second spring 10; the elastic pressing body 11 is cylindrical, a limiting boss 12 is arranged on the periphery of the middle of the elastic pressing body, the rear end of the spring II 10 is sleeved on the periphery of the front end of the elastic pressing body 11, and the end part of the rear end of the spring II abuts against the front end face of the limiting boss 12.
The rear buffer 3 also comprises an installation sleeve 13, and the rear end of the installation sleeve 13 is a retainer ring 14 which is radially and inwardly protruded to form a telescopic hole 15; the front end of the mounting sleeve 13 is sleeved on the periphery of the rear end of the ball screw, the second spring 10 is sleeved in the mounting sleeve 13, the rear end of the elastic pressing body 11 extends backwards from the telescopic hole 15 of the retainer ring 14 and is exposed out of a section behind the retainer ring 14, and the rear end face of the limiting boss 12 abuts against the inner side face of the retainer ring 14; the second spring is pre-compressed according to the set strength; the biasing body 11 has a forward compression stroke.
The front end of the mounting sleeve 13 is provided with a first pin hole 16 and a second pin hole 17 at positions corresponding to the rear end of the ball screw, and the front end of the mounting sleeve 13 is sleeved behind the rear end of the ball screw and inserted into the first pin hole 16 and the second pin hole 17 in an interference fit mode through a pin shaft 18.
As shown in fig. 2, 4, 5 and 6, the sealing member includes a bellows 19 made of an elastic material, the bellows 19 is sleeved on the front end of the ball screw 1 and the rear end of the cylinder body 5 of the cylinder 4, the front end of the bellows is fixed on the periphery of the cylinder body 5 and sealed with the periphery of the cylinder body 5, and the rear end of the bellows is fixed on the periphery of the ball screw 1 and sealed with the periphery of the ball screw 1; a ram 29 is also provided between the ball screw 1 and the piston 27 in the cylinder 4, whereby the ram 29 is also located in the bellows 19. The bellows 19 can be contracted and extended as the ball screw 1 is pushed into the cylinder 4 or retracted from the cylinder 4.
The AMT transmission protection mechanism further comprises a clamping surface 20 arranged on the periphery of the oil cylinder body 5 of the oil cylinder 4, a front clamping ring 21 is arranged at the front end of the corrugated pipe 19, and the front clamping ring 21 is tightly sleeved on the clamping surface 20 on the periphery of the oil cylinder body 5.
AMT derailleur protection mechanism, still including establishing the tight hoop groove 24 in solid fixed ring 8 periphery, the rear end of bellows 19 has back tight hoop 22, back tight hoop 22 tight cover is in the tight hoop groove 24 of solid fixed ring 8 periphery.
The periphery of the front end of the front clamping ring 21 is provided with a circumferential outward pressing edge 23, the front end of the clamping surface 20 of the periphery of the cylinder body 5 is provided with a front limiting flange 25 which protrudes outwards in the axial direction, a transmission shell 28 which is positioned at the front end of the corrugated pipe 19 is provided with a radial inward annular rear limiting flange 26, and the pressing edge 23 of the corrugated pipe 19 is pressed between the front limiting flange 25 and the rear limiting flange 26.
The ratio of the inner diameter of the corrugated pipe 19 to the inner diameter of the oil cylinder 4 is 1-1.2: 1; such as 1:1,1.1:1, 1.2: 1. The arrangement is that the inner diameter of the bellows 19 is basically consistent with the inner diameter of the oil cylinder 4, so that the variation of the inner space of the bellows 19 during compression or extension can be basically consistent with the variation of the space of the oil cylinder 4 at the rear part of the piston 27, and the phenomenon that the sealing performance and the service life of the bellows are influenced due to overlarge air pressure variation in the bellows 19 and overlarge expansion and contraction amplitude of the bellows is avoided.
The above-described embodiments are intended to illustrate the utility model more clearly and should not be construed as limiting the scope of the utility model covered thereby, any modification of the equivalent should be considered as falling within the scope of the utility model covered thereby.
Claims (10)
1. The AMT transmission protection mechanism is characterized in that a front buffer (2) and a rear buffer (3) are arranged at the front end and the rear end of a ball screw (1); a sealing member made of an elastic material capable of sealing a joint portion between the front end of the ball screw (1) and the rear end of the cylinder body (5) is provided.
2. The AMT transmission protection mechanism according to claim 1, wherein: the front buffer (2) comprises a front elastic part and a sliding ring (6), wherein the front elastic part is sleeved on the periphery of the front section of the ball screw (1), the rear end of the front elastic part is limited backwards, and the sliding ring (6) is arranged at the front end of the front elastic part and sleeved on the periphery of the ball screw (1); when the forward movement stroke of the ball screw (1) with impact kinetic energy is close to the end point, the sliding ring (6) firstly contacts the rear end of the oil cylinder body (5) and forces the front elastic piece to compress in the process of the subsequent completion of the movement stroke of the ball screw (1).
3. The AMT-transmission protection mechanism according to claim 1 or 2, characterized in that: the rear buffer (3) comprises a rear elastic piece arranged at the rear end of the ball screw (1); when the backward movement stroke of the ball screw (1) with impact kinetic energy is close to the end point, the rear elastic piece firstly contacts a rear seat stop piece (7) arranged on a transmission shell (28) and is forced to be compressed in the process of the subsequent completion of the movement stroke of the ball screw (1).
4. The AMT transmission protection mechanism according to claim 3, wherein: the front buffer (2) also comprises a fixing ring (8) sleeved on the periphery of the ball screw (1) at the rear end of the front elastic part, and the rear end of the front elastic part is limited backwards, namely the rear end of the front elastic part is contacted with the fixing ring (8); the front elastic piece is a first spring (9); the front end of the first spring (9) is connected with the sliding ring (6), and the rear end of the first spring is connected with the fixed ring (8); the rear elastic piece is a second spring (10).
5. The AMT transmission protection mechanism according to claim 3, wherein: the rear buffer (3) also comprises an elastic pressing body (11) arranged at the front end of the second spring (10); the elastic pressing body (11) is cylindrical, a limiting boss (12) is arranged on the periphery of the middle of the elastic pressing body, the rear end of the second spring (10) is sleeved on the periphery of the front end of the elastic pressing body (11), and the end part of the rear end of the second spring abuts against the front end face of the limiting boss (12).
6. The AMT transmission protection mechanism according to claim 5, wherein: the rear buffer (3) also comprises an installation sleeve (13), and the rear end of the installation sleeve (13) is a retaining ring (14) which is radially and inwards protruded to form a telescopic hole (15); the front end of the mounting sleeve (13) is sleeved on the periphery of the rear end of the ball screw, the second spring (10) is sleeved in the mounting sleeve (13), the rear end of the elastic pressing body (11) extends backwards from the telescopic hole (15) of the retainer ring (14) and is exposed out of one section behind the retainer ring (14), and the rear end face of the limiting boss (12) abuts against the inner side face of the retainer ring (14); the second spring is pre-compressed according to the set strength; the biasing body (11) has a forward compression stroke.
7. The AMT transmission protection mechanism according to claim 4, wherein: the sealing element comprises a corrugated pipe (19) made of elastic materials, the corrugated pipe (19) is sleeved at the front end of the ball screw (1) and the rear end of the oil cylinder body (5) of the oil cylinder (4), the front end of the corrugated pipe is fixed at the periphery of the oil cylinder body (5) and is sealed with the periphery of the oil cylinder body (5), and the rear end of the corrugated pipe is fixed at the periphery of the ball screw (1) and is sealed with the periphery of the ball screw (1); the corrugated pipe (19) can contract and stretch along with the pushing of the ball screw (1) into the oil cylinder (4) or the retraction of the ball screw from the oil cylinder (4).
8. The AMT transmission protection mechanism according to claim 7, wherein: the corrugated pipe is characterized by further comprising a tightening surface (20) arranged on the periphery of the oil cylinder body (5) of the oil cylinder (4), wherein a front tightening ring (21) is arranged at the front end of the corrugated pipe (19), and the front tightening ring (21) is tightly sleeved on the tightening surface (20) on the periphery of the oil cylinder body (5).
9. The AMT transmission protection mechanism according to claim 8, wherein: still including establishing at the tight hoop groove (24) of solid fixed ring (8) periphery, the rear end of bellows (19) has back tight hoop (22), back tight hoop (22) tight cover is in the tight hoop groove (24) of solid fixed ring (8) periphery.
10. The AMT transmission protection mechanism according to claim 8, wherein: the periphery of the front end of the front clamping ring (21) is provided with a circumferential outward pressing edge (23), the front end of a clamping surface (20) of the periphery of the cylinder body (5) is provided with a front limiting flange (25) which protrudes outward in the axial direction, a transmission shell (28) which is positioned at the front end of the corrugated pipe (19) is provided with a radial inward annular rear limiting flange (26), and the pressing edge (23) of the corrugated pipe (19) is pressed between the front limiting flange (25) and the rear limiting flange (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121412333.7U CN215928351U (en) | 2021-06-24 | 2021-06-24 | AMT transmission protection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121412333.7U CN215928351U (en) | 2021-06-24 | 2021-06-24 | AMT transmission protection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215928351U true CN215928351U (en) | 2022-03-01 |
Family
ID=80403766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121412333.7U Active CN215928351U (en) | 2021-06-24 | 2021-06-24 | AMT transmission protection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215928351U (en) |
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2021
- 2021-06-24 CN CN202121412333.7U patent/CN215928351U/en active Active
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