CN102426006B - Friction wheel type adjustment and measurement mechanism - Google Patents

Abstract

The invention discloses a friction wheel type adjustment and measurement mechanism, which is characterized in that: the left measuring unit utilizes friction force to drive the active friction wheel rotated by teeth to be supported on the front end of the active friction wheel bracket, and the cylinder of the swing cylinder The rod is connected to a crank, and through the crank, the active friction wheel fixed on the crank is driven to rotate through the set angle; the passive friction wheel and the large pulley in the measuring unit on the right side are installed on the driven wheel shaft by using the friction force to rotate with the differential shell. Above, the driven wheel shaft is installed in the shaft hole on the second floating worktable through bearings; the large pulley drives a small pulley through a synchronous belt, and the encoder and the small pulley are used to obtain the rotation angle data of the small pulley. Coaxial setting with pulleys. The invention effectively solves the problems of large error and uncertainty in manual adjustment of the main and driven gear side clearance.

Description

A friction wheel type adjustment and measurement mechanism

technical field

The invention relates to the field of final reducer assembly, in particular to an adjustment and online measurement mechanism for the main and driven gear side clearance of the final reducer.

Background technique

The impact of the product quality of the main reducer on the transmission quality of the automobile drive train is related to the performance of the vehicle such as energy saving and comfort. In the assembly of main reducer products, the adjustment of the flower nuts on both sides of the differential directly affects the pretightening force of the differential bearing and the main backlash, which is an important link in the assembly process of the final reducer.

At present, domestic OEMs mostly use manual adjustment, but its randomness is relatively large, and it is difficult to achieve high-quality assembly of the main reducer through process control, and the product failure rate is high.

Contents of the invention

In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a friction wheel type adjustment and measurement mechanism, which is used to adjust the pretightening force of the differential bearing and the backlash of the main and passive teeth to achieve the optimum Mesh state, in order to improve the quality of the main reducer assembly, improve the reliability of work, and prolong the service life of the main reducer assembly.

The present invention adopts following technical scheme for solving technical problems:

The structural characteristics of the friction wheel type adjustment measuring mechanism of the present invention are:

A left side measurement unit, including: the cylinder seat of the first linear cylinder is fixedly arranged on the first frame through the first connecting flange, and the cylinder rod of the first linear cylinder is connected by bolts to a swing cylinder and active friction on the first floating workbench of the wheel bracket; the active friction wheel driven by the teeth to be rotated by friction is supported on the front end of the active friction wheel bracket, and a crank is connected with the cylinder rod of the swing cylinder, and is driven by the crank The active friction wheel fixed on the crank rotates through the set angle;

A measuring unit on the right side, including: the second linear cylinder is fixedly arranged on the second frame through the second connecting flange, and the cylinder rod of the second linear cylinder is connected by bolts to the second floating worktable on which the encoder bracket is installed ; A passive friction wheel and a large pulley that utilizes friction to rotate with the differential shell are installed together on the driven wheel shaft, and the driven wheel shaft is installed in the shaft hole on the second floating worktable through a bearing; the large pulley passes through the The synchronous belt drives a small pulley, and the encoder for obtaining the rotation angle data of the small pulley is arranged coaxially with the small pulley.

The structural characteristics of the friction wheel type adjustment measuring mechanism of the present invention also lie in:

The speed ratio of the large pulley and the small pulley driven by the synchronous belt is set to be 1:2.

On the first frame, a first linear guide rail is arranged along a direction parallel to the cylinder rod of the first linear cylinder, and a first slider is slidably matched with the first linear guide rail, and the The first floating workbench is supported on the first slider; on the second frame, a second linear guide rail is set along a direction parallel to the cylinder rod of the second linear cylinder, and a second The slider is slidingly matched with the second linear guide rail, and the second floating workbench is supported on the second slider.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

In the present invention, the active friction wheel is driven by the left measuring unit, so that the driven gear and the active friction wheel rotate synchronously; The encoder measures the rotation angle of the differential housing, which effectively solves the problem of large errors and uncertainties in manually adjusting the backlash of the main and driven gears.

Description of drawings

Fig. 1 is a schematic structural view of the left measurement unit of the present invention;

Fig. 2 is a schematic diagram of the principle of the left measurement unit of the present invention;

Fig. 3 is a structural schematic diagram of the measuring unit on the right side of the present invention;

Fig. 4 is a schematic diagram of the working state structure of the present invention;

Labels in the figure: 1 the first linear cylinder; 2 the first connecting flange; 3 the first floating table; 4 the first frame; 5 the first linear guide; 6 active friction wheel; 7 active friction wheel support; 8 Swing cylinder; 8a crank; 9 second frame; 10 second linear guide rail; 11 second floating table; 12 second connecting flange; 13 second linear cylinder; 14 encoder bracket; 15 encoder; 16 small belt 17 synchronous belt; 18 passive friction wheel; 19 large pulley; 20 driven axle; 21 gear; 22 difference shell; a crank;

Detailed ways

In this embodiment, the friction wheel type adjustment and measurement mechanism has:

The left measuring unit shown in Fig. 1 and Fig. 2 includes: the cylinder base of the first linear cylinder 1 is fixedly arranged on the first frame 4 through the first connecting flange 2, and the cylinder rod of the first linear cylinder 1 It is connected by bolts on the first floating workbench 3 on which the swing cylinder 8 and the active friction wheel bracket 7 are installed; on the first frame 4, a second A linear guide rail 5, the first slider is slidingly matched with the first linear guide rail 5, and the first floating workbench 3 is supported on the first slider; the active friction wheel 6 rotated by the teeth 21 is supported by the friction force on the active The front end of the friction wheel support 7 is connected to a crank 8a with the cylinder rod of the swing cylinder 8, and the active friction wheel 6 fixed on the crank 8a is driven by the crank 8a to turn over a set angle;

Figure 2 is a schematic diagram of the crank rocker mechanism of the left measuring unit, corresponding to Figure 1, the expansion and contraction of the cylinder rod of the swing cylinder 8 causes the main body of the swing cylinder to rotate, and the rotation of the swing cylinder 8 makes the solidified on the crank through the action of the connecting rod Active friction wheel 6 rotates a certain angle. The crank a and the active friction wheel are fixed, the rod end of the cylinder rod b of the swing cylinder is hinged with the crank a, the cylinder seat of the swing cylinder is used as the rocker c, and the first floating table and the active friction wheel bracket are used as the support d.

The measuring unit on the right side shown in Fig. 3 comprises: the second linear cylinder 13 is fixedly arranged on the second frame 9 through the second connecting flange 12, and the cylinder rod of the second linear cylinder 13 is connected by bolts on the encoder. On the second floating workbench 11 of support 14; On the second frame 9, the second linear guide rail 10 is set along the direction parallel to the cylinder rod of the second linear cylinder 13, and the second slide block and the second The linear guide rail 10 is slidably matched, and the second floating table 11 is supported on the second slider; the passive friction wheel 18 and the large pulley 19 that rotate with the differential shell 22 by using friction force are jointly installed on the driven wheel shaft 20, and the driven wheel shaft 20 passes through The bearing is installed in the shaft hole on the second floating table 11; the small pulley 16 is driven by the large pulley 19 through the synchronous belt 17, and the encoder 15 and the small pulley 16 used to obtain the rotation angle data of the small pulley 16 coaxial setting.

As shown in Figure 4, the retraction of the cylinder rod of the first linear cylinder 1 causes the first floating table 3 to move down along the first guide rail 5 until the driving friction wheel 6 is pressed against the gear; The cylinder 8 rotates at a certain angle, and the active friction wheel 6 fixed on the crank is driven by the crank rocker mechanism to rotate, so that the gear 21 is driven to rotate by the action of the friction force; the cylinder rod of the second linear cylinder 13 retracts to make the first The second floating table 11 moves down along the second guide rail 10 until the passive friction wheel 18 is pressed against the differential shell 22, so that the differential shell can drive the passive friction wheel 18 to rotate with it under the action of friction, and the passive friction Wheel 18 and large pulley 19 are coaxial and have the same rotation angle and angular velocity. Then the small pulley 16 is driven to rotate by the synchronous belt 17 with a speed ratio of 1:2, and the small pulley 16 amplifies the rotation angle of the large pulley 19, that is, the passive friction wheel 18, that is, the differential shell twice according to the speed ratio of the synchronous belt. . The rotation angle data of the small pulley 16 obtained by the encoder 15 is divided by the magnification to obtain the rotation angle of the difference housing, and the rotation angle of the difference housing 22 can be converted into a backlash value by the encoder 15 . Taking the average of the three positions on the tooth 21 can obtain a more accurate backlash value.

Claims (3)

1. the wheeled adjustment measuring mechanism of the friction of main reducing gear main quilt backlash, is characterized in that having:

One left side measuring unit, comprise: it is upper that the cylinder block of the first straight line cylinder (1) is fixedly installed on the first frame (4) by the first joint flange (2), and the cylinder rod of the first straight line cylinder (1) is connected on the first floating work bench (3) that oscillating cylinder (8) and active friction wheel support (7) are installed by bolt; Utilize friction force to drive the active friction wheel (6) being rotated by tooth (21) to be supported on the front end of described active friction wheel support (7), the cylinder rod of described oscillating cylinder (8) connects a crank (8a), and drives the active friction wheel (6) being cemented on crank to turn over set angle by described crank (8a);

One right side measuring unit, comprise: it is upper that the second straight line cylinder (13) is fixedly installed on the second frame (9) by the second joint flange (12), and the cylinder rod of the second straight line cylinder (13) is connected on the second floating work bench (11) that scrambler support (14) is installed by bolt; One utilizes driven pulley (18) and the large belt wheel (19) that friction force is rotated with poor shell (22) to be jointly arranged on passive wheel shaft (20) above, and described passive wheel shaft (20) is arranged in the axis hole on the second floating work bench (11) by bearing; With described large belt wheel (19), by Timing Belt (17), drive a small pulley (16), for obtaining the scrambler (15) of the corner data of small pulley (16), coaxially arrange with small pulley (16).

2. the wheeled adjustment measuring mechanism of the friction of main reducing gear main quilt backlash according to claim 1, is characterized in that: it is 1:2 with the speed ratio of small pulley (16) that the large belt wheel (19) being driven by Timing Belt (17) is set.

3. the wheeled adjustment measuring mechanism of the friction of main reducing gear main quilt backlash according to claim 1, it is characterized in that: in described the first frame (4), in the parallel direction of the cylinder rod with described the first straight line cylinder (1), the first line slideway (5) is set, and having the first slide block and the first line slideway (5) to be slidably matched, described the first floating work bench (3) is supported on described the first slide block; In described the second frame (9), in the parallel direction of the cylinder rod with described the second straight line cylinder (13), the second line slideway (10) is set, and having the second slide block and the second line slideway (10) to be slidably matched, described the second floating work bench (11) is supported on described the second slide block.

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