CN102606728A

CN102606728A - Gear selecting mechanism of transmission

Info

Publication number: CN102606728A
Application number: CN2012100858329A
Authority: CN
Inventors: 庄周
Original assignee: Chongqing Qingshan Industry Co Ltd
Current assignee: China Changan Automobile Group
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-07-25
Anticipated expiration: 2032-03-28
Also published as: CN102606728B

Abstract

The invention discloses a gear shifting box mechanism of a transmission with a single return spring. The gear shifting box mechanism comprises a gear selecting mechanism, a gear shifting mechanism and a five-gear-reversing interlocking mechanism. The gear shifting box mechanism is characterized in that the gear shifting mechanism is a gear withdrawal return device with a single spring. The gear shifting box mechanism has the advantages that the structure is simplified, cost is saved, and a gear shifting performance is improved.

Description

A kind of speed changer select gear mechanism

Technical field

The present invention relates to the gear shift punch-out equipment structure of automotive transmission, especially relate to the gear shift punch-out equipment structure of little car speed changer of single return spring of five forward gearss.

Technical background

At present, speed changer all uses independently the gear shift case to realize a gear shift and a choosing shelves function basically.For it is possessed move back shelves return in a function, promptly speed changer is when a second gear or five reverse gears return to neutral gear, gear shifting handle is got back to the neutral position of selector automatically; Be employed in the structure of adorning two springs on the shift shaft of gear shift fork both sides more; Rely on the effect of two spring forces to make in its time, this kind structure is comparatively complicated, and the part of use is more; Have and take up room greatly the more high shortcoming of cost.

Summary of the invention

The speed changer that the purpose of this invention is to provide a kind of single return spring selects gear mechanism, and it is simple in structure, multiple functional, and manoeuvrable is applicable to the five speed transmission of multiple model.

Technological scheme of the present invention is following:

The gear mechanism that selects of speed changer according to the invention comprises gear shift case, shift shaft and gear shift fork; Said shift shaft passes the gear shift case and is supported on its right ends; Gear shifting rocking arm is fixed on the left end place of shift shaft through pin; Shift selecting rocking arm is fixed on the outside left end of gear shift case and cooperatively interacts with gear shifting rocking arm, and said gear shift fork is in the gear shift case and be fixed on the shift shaft.It is characterized in that: be set with the gear shift support block on the shift shaft in said gear shift case; The left surface of gear shift support block is by the casing of gear shift case or the limited part axial limiting in the casing; Said gear shift support block has been reserved the axial displacement space in the centre; The gear shift fork just in time is arranged in said axial displacement space, and the span that selects that the axial length that the axial length in axial displacement space deducts the gear shift support block equals shift shaft leaves; Also be set with return spring and shift shaft packing ring on the said shift shaft; Return spring is between the right flank and shift shaft packing ring of gear shift support block; The right side of shift shaft packing ring is provided with collar; Be stuck in the groove of shift shaft, the right flank of shift shaft packing ring also carries out axial limiting by the casing of gear shift case.

Speed changer involved in the present invention is converted into the elasticity of drag-line through shift selecting rocking arm the axial moving force of shift shaft; Shift shaft drives the gear shift fork and moves axially realization choosing shelves, and the gear shift fork moves back shelves through the interaction realization of return spring and transposition support block and gear shift case and returns a middle function.It is thus clear that the gear mechanism that selects of the present invention only uses a spring can realize moving back shelves time middle function; Owing to adopted the design of systems such as transposition support block; Can effectively reduce and move back the number of spare parts that shelves go back to middle system, simplify the internal structure of gear shift punch-out equipment structure significantly.

Description of drawings

Fig. 1 is the structural representation with shifting of transmission case of the present invention's technology;

Fig. 2 is the right elevation of Fig. 1;

Fig. 3 is the schematic representation that wherein selects gear mechanism;

Fig. 4 is the gearshift mechanism schematic representation;

Fig. 5 is the schematic representation of five reverse-gear mutual interlocking gear.

Embodiment

Below in conjunction with accompanying drawing the present invention is further described:

Shifting of transmission punch-out equipment structure referring to Fig. 1, a kind of single return spring shown in Figure 2 comprises and selects gear mechanism, gearshift mechanism, five reverse-gear mutual interlocking gear.

Referring to Fig. 3, improvement of the present invention is to select gear mechanism, and it comprises gear shift case 1, shift shaft 9, gear shift fork 6, transposition support block 5, return spring 4, shift shaft packing ring 3 and collar 2 etc.Shift selecting rocking arm 11 cooperates in gear shift case 1 casing outside and with gear shifting rocking arm through screw.Shift shaft 9 strings rely on gear shift case two end supports in gear shift case 1.Gear shifting rocking arm 12, gear shift fork 6 are connected on the shift shaft 9 through pin, and collar 2 is stuck in the groove of shift shaft 9 and can moves with shift shaft 9.Transposition support block 5, return spring 4, shift shaft packing ring 3 skies are enclosed within on the shift shaft 9, rely on gear shift case 1, gear shift fork 4 and collar 2 to limit its axial position.

Particularly; Gear shift support block 5 is a U-shaped piece; Side plate sky through its left and right sides is enclosed within on the shift shaft 9; Gear shift fork 6 is between its left and right sides plate, and the axial space between the plate of the left and right sides is the axial displacement space, and the span that selects that the axial length that the axial length in this axial displacement space deducts gear shift support block 5 equals shift shaft leaves.The left surface of gear shift support block 5 promptly carries out spacing by limited part A to gear shift support block 5 displacement distance left by the casing of gear shift case 1 or the limited part A axial limiting in the casing.Return spring 4 is between the right flank and shift shaft packing ring 3 of gear shift support block 5; The right side of shift shaft packing ring 3 is provided with collar 2; Be stuck in the groove of shift shaft 9; The right flank of shift shaft packing ring 3 is by the casing of gear shift case 1 or another limited part B axial limiting in the casing, and promptly this limited part B carries out spacing to gear shift shaft filler washer 3 displacement distance to the right.

Referring to Fig. 4, shift shaft 9 strings of gearshift mechanism rely on gear shift case two end supports in gear shift case 1.Gear shifting rocking arm 12, gear shift fork 6 are fixed on the shift shaft 9 through pin, and locking steel ball assembly 13 is through being threaded on the gear shift case, and cooperate with gear shift fork 6.

Referring to Fig. 5; The reverse gear locking cam 16 of five reverse-gear mutual interlocking gear, reverse gear lock return spring 14 are fixed on the gear shift case 1 through reverse gear lock bolt 15; Reverse gear locking cam pin 17 is through being full of matching and fixing on the gear shift case, and five reverse gear interlocking plungers 18 are welded on the gear shift fork 6 through the mode of welding.

Each function implementation is following:

1. select shelves and move back grade implementation of return function:

Elected shelves rocking arm 11 clockwise rotates; Driving gear shifting rocking arm 12 axially moves left; The gear shift fork 6, the collar 2 that are fixed on the shift shaft are moved to the left realization selection five reverse gears simultaneously; Collar 2 will drive shift shaft packing ring 3 return springs 4 and was moved to the left this moment, was moved to the left because the limited part A of gear shift case 1 has limited transposition support block 5, and therefore this moment, return spring 4 was compressed.When speed changer when five grades or reverse gear withdraw from, the spring force of compressed return spring 4 just can make gear shift fork 6 get back to the neutral position and realize moving back a grade return function.

In like manner; Elected shelves rocking arm 11 rotates counterclockwise; Drive gear shifting rocking arm 12 and axially move right, be fixed on gear shift fork 6, collar 2 on the shift shaft and move right simultaneously and realize selecting a second gear, gear shift this moment fork 6 will drive transposition support block 5 return springs 4 and move right; Because gear shift case 1 has limited shift shaft packing ring 3 and moved right, therefore this moment, return spring 4 was compressed.When speed changer when one grade or second gear withdraw from, the spring force of compressed return spring 4 just can make gear shift fork 6 get back to the neutral position and realize moving back a grade return function.

2. gear shift implementation:

Gear shifting rocking arm 12 rotating bands are moved grade fork 13 and are rotated the realization gear shift.

3. five reverse gear interlocking implementations:

Can know that by an above-mentioned speed changer choosing shelves implementation when speed changer during to five reverse gear directions choosing shelves, gear shift fork 6 will outwards move with shift shaft; Be welded on the gear shift fork 6 five reverse gear interlocking plungers 18 this moment and also will move, when moving to reverse gear locking cam 16, will compress it with it; Reverse gear locking cam 16 clockwise rotates along reverse gear lock bolt 15; Five reverse gear interlocking plungers 18 will slide into the below of reverse gear locking cam 16 when speed changer is hung five grades, as hanging i.e. not return, the directly upwards upset of five reverse gear interlocking plungers 18 of reverse gear by force; It will drive reverse gear locking cam 16 and rotate counterclockwise together; At this moment will bump against reverse gear locking cam pin 17 can't be rotated further, and promptly can't hang reverse gear, has realized five reverse gear interlocking functions.

Claims

A speed changer select gear mechanism, comprise gear shift case (1), shift shaft (9) and gear shift fork (6); Said shift shaft (9) passes gear shift case (1) and is supported on its right ends; Gear shifting rocking arm (12) is fixed on the left end place of shift shaft (9) through pin; Shift selecting rocking arm (11) is fixed on the outside left end of gear shift case (1) and cooperatively interacts with gear shifting rocking arm (12), and said gear shift fork (6) is in gear shift case (1) and be fixed on the shift shaft (9); It is characterized in that: be set with gear shift support block (5) on the shift shaft (9) in said gear shift case (1); The left surface of gear shift support block (5) carries out axial limiting by the casing of gear shift case (1); Said gear shift support block (5) has been reserved the axial displacement space in the centre; Gear shift fork (6) just in time is arranged in said axial displacement space, and the span that selects that the axial length that the axial length in axial displacement space deducts gear shift support block (5) equals shift shaft leaves; Also be set with return spring (4) and shift shaft packing ring (3) on the said shift shaft (9); Return spring (4) is positioned between the right flank and shift shaft packing ring (3) of gear shift support block (5); The right side of shift shaft packing ring (3) is provided with collar (2); Be stuck in the groove of shift shaft (9), the right flank of shift shaft packing ring (3) also carries out axial limiting by the casing of gear shift case (1).
2. speed changer according to claim 1 selects gear mechanism; It is characterized in that: said gear shift support block (5) is a U-shaped piece; Side plate sky through its left and right sides is enclosed within on the shift shaft (9); Gear shift fork (6) is between its left and right sides plate, and the axial space between the plate of the left and right sides is the axial displacement space.