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CN-121977051-A - 2AMT speed change assembly

CN121977051ACN 121977051 ACN121977051 ACN 121977051ACN-121977051-A

Abstract

According to the 2AMT speed change assembly, the main shaft is sleeved with the spline sleeve, the first gear transmission gear and the second gear transmission gear which are positioned on two sides of the spline sleeve are movably sleeved on the main shaft, the first gear transmission gear and the second gear transmission gear are fixedly sleeved with the first gear sleeve and the second gear sleeve respectively, the sliding sleeve is sleeved on the spline sleeve, the external spline of the spline sleeve is connected with the internal spline of the sliding sleeve in a key way, and when the sliding sleeve axially slides on the spline sleeve, the internal spline of the sliding sleeve can be connected with the first gear connecting key of the first gear sleeve or the second gear connecting key of the second gear sleeve in a key way. The 2AMT speed change assembly is simple in structure, convenient to switch and has a gear locking function.

Inventors

  • BO QILEI
  • CHEN JIATING
  • WANG ANLONG

Assignees

  • 猎户星变速器(无锡)有限公司
  • 润和变速器(徐州)有限公司

Dates

Publication Date
20260505
Application Date
20251202

Claims (7)

  1. 1. An AMT (automated mechanical transmission) speed change assembly of a main shaft (2) is characterized in that a spline sleeve (2) is sleeved on the main shaft (1), a first gear (3) and a second gear (4) which are positioned on two sides of the spline sleeve (2) are movably sleeved on the main shaft (1), a first gear sleeve (5) and a second gear sleeve (6) are fixedly sleeved on the first gear (3) and the second gear (4) respectively, a sliding sleeve (7) is sleeved on the spline sleeve (2), external splines (2.1) of the spline sleeve (2) are connected with internal splines (7.1) of the sliding sleeve (7) in a key manner, and when the sliding sleeve (7) axially slides on the spline sleeve (2), the internal splines (7.1) of the sliding sleeve (7) can be connected with first gear connecting keys (5.1) of the first gear sleeve (5) or second gear connecting keys (6.1) of the second gear sleeve (6) in a key manner.
  2. 2. The 2AMT speed change assembly according to claim 1, wherein the sliding sleeve (7) is driven by the shift fork (8) to slide left and right along the spline housing (2), a shift groove (7.2) with an annular structure is arranged on the outer wall of the sliding sleeve (7), a fork member (8.1) of the shift fork (8) is embedded in the shift groove (7.2), the shift fork (8) rotates around the fixed shaft (9), a poking head (10.1) at the bottom of the poking member (10) is positioned in the poking groove (8.2) at the top of the shift fork (8), and the poking member (10) rotates around the central axis of the poking shaft (11).
  3. 3. The 2AMT transmission assembly according to claim 2, wherein the top of the toggle member (10) is vertically provided with two ear plates (10.2), the top of each ear plate (10.2) is provided with a groove (10.3), and the sliding connecting members (12.1) which are arranged at the two sides of the sliding member (12) in a protruding manner are placed in the two grooves (10.3).
  4. 4. A2 AMT speed change assembly according to claim 3, wherein the sliding member (12) is a screw-nut mechanism, driven by a driving motor (13), the driving motor (13) drives a screw rod forming the sliding member (12) to rotate, the rotating screw rod drives a nut member rotating on the sliding member to realize horizontal movement, and the sliding connecting member (12.1) is arranged on the nut member.
  5. 5. A2 AMT speed change assembly according to claim 2, wherein one end of the shifting shaft (11) is provided with a gear sensor (15), the other end of the shifting shaft (11) is provided with a limit groove (11.1) with an annular structure, and a limit piece (14) fixed on the shell is positioned in the limit groove (11.1).
  6. 6. A2 AMT speed change assembly according to claim 2 is characterized in that three locking grooves (9.1) are formed in parallel on the shaft wall of the fixed shaft (9), a locking hole (8.3) is formed in the gear shift fork (8) vertically, a locking ball (16) is located in the locking hole (8.3) and the top part of the locking ball is embedded into the locking groove (9.1), and the locking ball (16) is pushed into the locking groove (9.1) by the locking spring (17).
  7. 7. The 2AMT transmission assembly as claimed in claim 6, wherein the lock-up spring (17) is located in the lock-up hole (8.3), the bottom of the lock-up hole (8.3) is blocked with the plug (8.4), and the lock-up spring (17) is located between the plug (8.4) and the lock-up ball (16).

Description

2AMT speed change assembly Technical Field The invention relates to a 2AMT speed change assembly, and belongs to the technical field of speed change devices. Background At present, with the popularization of new energy technology, electric vehicles are widely applied in production, production and agriculture. The general electric vehicle (other than four-wheel automobile) can meet the daily application by adopting two-stage speed change, for this purpose, the company has declared that Chinese patent 2025201118292 'a novel 2AMT automatic gearbox' carries out transmission speed change through a planetary gear mechanism, or as declared by the company, chinese patent 2025206676219 'a clutch and gearbox' realizes transmission speed change through a friction plate group combination mode. However, the two-stage automatic speed change mechanism which is simpler in structure, convenient to switch and has a gear locking function is also lacking in application, so that the two-stage automatic speed change mechanism is applied to complex operation occasions requiring large torque. Disclosure of Invention The invention aims to overcome the defects, and provides the 2AMT speed change assembly which has the advantages of simple structure, convenience in switching and gear locking function, and higher transmission efficiency by a transmission mode of mechanical key connection. The purpose of the invention is realized in the following way: A spline housing is sleeved on a main shaft, a first gear transmission gear and a second gear transmission gear which are positioned on two sides of the spline housing are movably sleeved on the main shaft, the first gear housing and the second gear housing are fixedly sleeved on the first gear transmission gear and the second gear transmission gear respectively, a sliding sleeve is sleeved on the spline housing, an external spline of the spline housing is connected with an internal spline of the sliding sleeve in a key manner, and when the sliding sleeve axially slides on the spline housing, the internal spline of the sliding sleeve can be connected with a first gear connecting key of the first gear housing or a second gear connecting key of the second gear housing in a key manner. Preferably, the sliding sleeve is driven by the gear shifting fork to slide left and right along the spline housing, a gear shifting groove with an annular structure is formed in the outer wall of the sliding sleeve, a shifting fork piece of the gear shifting fork is embedded in the gear shifting groove, the gear shifting fork rotates around the fixed shaft, a shifting head at the bottom of the shifting fork is positioned in a shifting groove at the top of the gear shifting fork, and the shifting piece rotates around the central axis of the shifting shaft. Preferably, the top of the poking piece is vertically provided with two ear plates, the top of each ear plate is provided with a groove, and the sliding connecting piece which is arranged at the two sides of the sliding piece in a protruding way and horizontally slides is placed in the two grooves. Preferably, the sliding piece is a screw-nut mechanism, and is driven by a driving motor, the driving motor drives a screw rod forming the sliding piece to rotate, the rotating screw rod drives a nut piece rotating on the screw rod to realize horizontal movement, and the sliding connecting piece is arranged on the nut piece. Preferably, one end of the poking shaft is provided with a gear sensor, the other end of the poking shaft is provided with a limiting groove with an annular structure, and a limiting piece fixed on the shell is positioned in the limiting groove. Preferably, three locking grooves are arranged on the shaft wall of the fixed shaft in parallel, a locking hole is vertically arranged on the gear shifting fork, the locking ball is positioned in the locking hole, the top part of the locking ball is embedded into the locking groove, and the locking ball is jacked into the locking groove by the locking spring. Preferably, the lock stop spring is positioned in the lock stop hole, the bottom of the lock stop hole is blocked with a plug, and the lock stop spring is positioned between the plug and the lock stop ball. Compared with the prior art, the invention has the beneficial effects that: The invention realizes the switching of the first gear and the second gear transmission gear by shifting the sliding sleeve through the shifting fork, has simple structure and high gear shifting efficiency, realizes the locking of the gear through the matching of the gear locking ball and the spring, and ensures the safety in the use process. Drawings FIG. 1 is a schematic diagram of a 2AMT transmission assembly according to the present invention. Fig. 2 and 3 are cross-sectional views of a 2AMT shift assembly in accordance with the present invention. Fig. 4 is a schematic structural view of a sliding sleeve according to the present invention. Fig. 5 is a partial cross-