CN202971862U - Five-gear automobile gearbox upper cover assembly with vibration prevention device - Google Patents

Abstract

A five-gear automobile gearbox upper cover assembly capable of preventing a direct control rod from vibrating in the running process of an automobile particularly relates to a five-gear automobile gearbox upper cover assembly with a vibration prevention device and is characterized in that in a mechanism that directly controls the five-gear automobile gearbox upper cover assembly, a tensioning mechanism composed of a gear-selecting stop pillar, a compression spring and a snap ring is additionally arranged at a four/five shift fork and a groove of a reverse-gear guide block, and through the tensioning mechanism, when the control rod is in neutral position or shifted to a position of any gear, a groove clearance between a shifting block of the control rod and a shift fork or a guide block of each gear can be eliminated automatically, so as to ensure that two support points of the control rod are always under the action of a tensioning force of the compression spring and achieve the purpose of preventing the control rod from vibrating during running of the automobile.

Description

Five-gear automobile upper cover of speed changing box assembly with the vibration proof device

Technical field

The utility model relates to five grades of upper cover of speed changing box gearshift mechanism devices of a kind of direct manipulation, especially can prevent the upper cover of speed changing box assembly of direct declutch shift lever vibration.

Background technique

At present, domestic five-gear automobile gearbox closely directly the control mechanism of gear shift be mainly by upper cover, declutch shift shaft, shift fork, safety only post, safety only the parts such as post spring, interlocking steel ball, top cover assembly combine.Its effect is vehicle in starting or running process, and the driver is by handling the purpose that realizes gear shift to direct shift level.The structural design of this operating mechanism has been ignored uncontrollable vibration that vehicle exists in car load Installation and Debugging and high speed running process, and the high speed rotating of transmission assembly can cause the vibration frequency of declutch shift lever, amplitude faster, larger, handle travelling comfort, flexibility and accuracy that vibration of bar can directly have influence on driver's gear shift, or even the fork shift bulb of operating handle and the shift fork transmission assembly abnormal sound that knocks generation, the fork shift bulb of the more serious disconnected shift level that shakes.

Summary of the invention

The vibration problem that occurs in the Vehicle Driving Cycle process for the operating handle that overcomes the direct selector device of existing five-gear automobile gearbox, the utility model provides a kind of five-gear automobile upper cover of speed changing box assembly, this assembly can not only be realized the closely directly gear shift of gearbox, and can prevent the vibration problem of operating handle in the Vehicle Driving Cycle process.

The technological scheme that its technical problem that solves the utility model adopts is: in five grades of direct gearshift mechanism devices of upper cover of speed changing box, each increases and arranges one and stop post, a Compress Spring and the tensioning mechanism that snap ring forms by a gear selecting at the gear shift groove of four or five grades of shift forks and a reverse gear guide block.Compress Spring requires be subject to compressive force time side's generation distortion of 280-340Nm, and the surface hardness that gear selecting is stopped post is not less than HRC28.When the gearbox operating handle was in neutral gear and second gear or third gear state, the gear selecting of operating handle shifting block bi-side was stopped the natural tension force that post is compressed spring, makes it be adjacent to all the time the operating handle shifting block, has eliminated the lateral clearance of operating handle shifting block and shift fork groove; When operating handle is in fourth gear or five grades of states, gear selecting on four or five grades of shift forks is stopped the compression tension force that post is compressed spring, make its side that is adjacent to all the time the operating handle shifting block, and make the another side be adjacent to two third gear shift forks, eliminated the lateral clearance of operating handle shifting block and shift fork groove; When operating handle is in one grade or reverse gear state, gear selecting on one reverse gear guide block is stopped the compression tension force that post is compressed spring, make it be adjacent to all the time a side of operating handle shifting block, and make the another side be adjacent to two third gear shift forks, when operating handle is in respectively above three kinds of states, the middle part ball of operating handle is also because the tension force that is subject to a Compress Spring is adjacent to the top cover spherical surface all the time, like this, operating handle has the tension force effect of spring by compression of two supporting points all the time, reaches to prevent operating handle vibrative purpose when Vehicle Driving Cycle.

The beneficial effects of the utility model are, realize that the five-gear automobile gearbox is closely directly when gear shift, can prevent that again vehicle from handling vibration of bar in the process of moving, improve the noise of travelling comfort, accuracy and reduction gearbox that the driver handles gearbox gear-shift, simple in structure.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the utility model embodiment's sectional structure chart.

Fig. 2 is the A-A sectional drawing of Fig. 1.

1. operating handles in figure, 2. spring, 3. top cover, 4. gear selecting is stopped post spring, 5. snap ring, 6. gear selecting is stopped post, 7. a reverse gear guide block, 8. steel wire, 9. dogbolt, 10. a reverse speed shift rod, 11. two third gear shift forks, 12. 2 third gear declutch shift shafts, 13. 45 grades of declutch shift shafts, 14. 45 grades of shift forks.

Embodiment

in Fig. 1, realize that gearbox gear-shift will divide two steps, the first step, (driver) promotes operating handle (1) to the left or to the right, operating handle (1) shifting block promotes gear selecting and stops post (6), gear selecting is stopped post spring (4) and snap ring (5) to two side shiftings, operating handle (1) shifting block is in respectively in the groove of a reverse gear guide block (7) or four or five grades of shift forks (14), realize the gear selecting operation, operating handle (1) is when nature is placed in the middle, operating handle (1) shifting block is in the groove of two third gear shift forks (11), also belong to the gear selecting operation.second step, (driver) stirs operating handle (1) after choosing gear forward or backward, operating handle (1) shifting block promotes respectively a reverse gear guide block (7), two third gear shift forks (11) and four or five grades of shift forks (14), one reverse gear guide block (7), two third gear shift forks (11), four or five grades of shift forks (14) are connected 8 with steel wire by dogbolt (9) respectively) connection, drive a reverse speed shift rod (10), two third gear declutch shift shafts (12), four or five grades of declutch shift shafts (13) move forward and backward, realize the conversion of each gear.

in Fig. 2, when operating handle (1) is in neutral gear and changes to second gear or three file locations, the gear selecting of operating handle (1) shifting block bi-side is stopped post (6) and is subject to the tension force that gear selecting is stopped the nature of post spring (4), makes it constantly be adjacent to operating handle (1) shifting block, when operating handle (1) is changed to fourth gear or five file locations, the gear selecting that operating handle (1) shifting block is pressed on four or five grades of shift forks (14) is constantly stopped post (6), and be subject to the tension force that gear selecting is stopped post spring (4), make its side that is adjacent to all the time operating handle (1) shifting block, and make the another side be adjacent to a side of two third gear shift forks (11), operating handle (1) shifts to first gear or during reverse gear position, the gear selecting that operating handle (1) shifting block is pressed on a reverse gear guide block (7) is constantly stopped post (6), and be subject to the tension force that gear selecting is stopped post spring (4), make it be adjacent to all the time a side of operating handle (1) shifting block, and make the another side be adjacent to a side of two third gear shift forks (11), when operating handle (1) is in respectively above three kinds of states, operating handle (1) middle part ball is also because the tension force that is subject to a Compress Spring (2) holds out against top cover (3) spherical surface all the time, like this, operating handle (1) has the tension force effect of spring by compression of two supporting points all the time, reach and prevent operating handle (1) vibrative purpose when Vehicle Driving Cycle.

Claims (1)

1. five-gear automobile upper cover of speed changing box assembly with the vibration proof device, it is characterized in that: in five grades of direct gearshift mechanism devices of upper cover of speed changing box, respectively arranging at the gear shift groove of four or five grades of shift forks and a reverse gear guide block increases by one and stops by a gear selecting tensioning mechanism that post (6), a Compress Spring (4) and a snap ring (5) form.

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