CN220690069U - Automatic measuring device for outer end face distance of shafting bearing of speed changer - Google Patents

Abstract

The utility model relates to an automatic measuring device for the distance between the outer end surfaces of shafting bearings of a speed changer, which comprises a turntable rotating in a horizontal plane, wherein tool components are installed on the top surface of the turntable at intervals, and each shaft group is supported on the tool components; a feeding pre-assembly station, a detection station and a bearing dismantling station which correspond to the tool assembly are arranged along the circumferential direction of the turntable; a material moving lifting assembly is arranged on a fixed seat positioned in the center of the turntable, a grabbing assembly is arranged on the side surface of the material moving lifting assembly in an up-and-down moving manner, and the grabbing assembly is positioned right above the material loading pre-assembly station; and after each shaft group is respectively fed to a feeding pre-assembly station of the turntable, the shaft groups are rotated to a detection station to detect the distance between the outer end surfaces of the bearings, then the shaft groups are rotated to a bearing dismantling station to detach the bearings on the corresponding shaft groups after the bearing dismantling station is lifted, finally the shaft groups are rotated to the feeding pre-assembly station to carry out meshing pre-assembly, and other stations outside the shaft groups are automatically transferred, so that the measurement of the distance between the outer end surfaces of the bearings on the shaft system is realized, and the stable and reliable assembly between the shaft system and the shell is effectively assisted.

Description

Automatic measuring device for outer end face distance of shafting bearing of speed changer

Technical Field

The utility model relates to the technical field of transmission assembly detection equipment, in particular to an automatic measuring device for the distance between the outer end face of a transmission shafting bearing.

Background

The quality of the assembly of a vehicle transmission directly affects the operational life and performance quality of the transmission. Gaps between the transmission shafting and the shell are adjusted through gaskets, and normal operation of all transmission parts of the shafting is guaranteed. Accurate selection of the thickness of the spacer is critical to ensure the quality of transmission assembly, and the spacer thickness is selected in turn depending on accurate measurement of the transmission shaft system height.

Different assembly lines of the automobile speed changer have different assembly processes, and with the popularization of automatic assembly, stations such as bearing outer ring assembly, shafting bearing outer ring height measurement, bearing outer ring offline and shafting clasping engagement offline are integrated in the assembly line body according to the requirements of a customer automatic assembly line body; only when the height of the outer ring of the bearing is accurately measured before the shaft system assembly of the transmission, the accuracy of subsequent cushion selection can be ensured, and meanwhile, the automatic assembly of the shaft system and the shell is completed.

Disclosure of Invention

The applicant provides an automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission with reasonable structure aiming at the defects in the prior art, so that the distance between the outer end surfaces of the shafting bearings is measured, accurate selection of gaskets is effectively assisted, stable and reliable assembly between the shafting bearings and a shell is ensured, the measurement is accurate, and the efficiency is high.

The technical scheme adopted by the utility model is as follows:

the automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the speed changer comprises a rotary table rotating in a horizontal plane, wherein tool components are uniformly arranged at intervals on the edge of the top surface of the rotary table, and each shaft group of the shafting is supported on the tool components; each station corresponding to the tooling assembly is arranged along the circumference of the turntable, one station is a feeding pre-assembly station, and a detection station and a bearing dismantling station are sequentially arranged along the rotation direction; a material moving lifting assembly is arranged on a fixed seat positioned in the center of the turntable, a grabbing assembly is arranged on the side surface of the material moving lifting assembly in an up-and-down moving manner, and the grabbing assembly is positioned right above the material loading pre-assembly station.

As a further improvement of the above technical scheme:

the structure of the single-group tool assembly is as follows: the device comprises a tooling bottom plate which is assembled on the top surface of a turntable, wherein a supporting seat corresponding to each shaft group of a shafting is arranged on the top surface of the tooling bottom plate; the top surfaces of the single supporting seats extend outwards along the circumferential direction at intervals to form a three-petal type supporting structure, and through holes which are penetrated up and down are formed in a tool bottom plate which is positioned right below the interval positions between the three-petal type supporting structure petals; the jacking mechanism and the detection station are respectively provided with a jacking piece, and the jacking pieces pass through the through holes from bottom to top and then support the corresponding shaft groups.

The structure of the jacking mechanism is as follows: the lifting device comprises a lifting cylinder arranged on the side surface of a fixed seat below the turntable, wherein a lifting plate is arranged at the output end of the lifting cylinder, and a plurality of lifting columns corresponding to the shaft group are arranged on the top surface of the lifting plate; the jacking cylinder pushes the jacking column upwards through the jacking plate, and the jacking column upwards passes through the turntable and the tool bottom plate and then upwards supports the corresponding shaft group.

The top surface of the tool bottom plate is also provided with tool sliding rails at intervals, the top surfaces of the tool sliding rails are provided with sliding tables in a sliding manner, a group of supporting seats are arranged on the sliding tables, and the sliding tables are provided with upper through holes and lower through holes corresponding to the corresponding through holes; the shaft group supported on the upper supporting seat of the sliding table moves towards the other shaft group until contact engagement along with the movement of the sliding table along the tool sliding rail; the end part of the top surface of the sliding table is provided with a handle convenient to operate.

The structure of the detection station is as follows: the vertical sliding rail is arranged at left and right intervals on the side surface of the supporting vertical frame, an upper lifting plate and a lower lifting plate are arranged on the vertical sliding rail in a sliding manner, the upper lifting plate is positioned above the turntable, the lower lifting plate is positioned below the turntable, and the upper lifting plate and the lower lifting plate are mutually independent to move along the vertical sliding rail in a lifting manner; the top surface of the lower lifting plate is provided with a jacking seat for supporting each corresponding shaft group in the shafting, and the top surface of the jacking seat is provided with a support column which is staggered circumferentially relative to a three-petal type supporting structure on the supporting seat; and the bottom surface of the upper lifting plate is provided with measuring head assemblies which are in one-to-one correspondence with the shaft groups.

The shaft system comprises three groups of shaft groups of a transmission shaft, a middle shaft and an input shaft which are axially parallel to each other, and three groups of measuring head assemblies corresponding to the three groups of shaft groups are arranged on the upper lifting plate, wherein two groups of measuring head assemblies are respectively arranged at the first bottom end of the detection assembly, and the other group of measuring head assemblies are arranged at the second bottom end of the detection assembly; and a rotating rod is arranged in the first detection assembly, penetrates through the measuring head assembly from top to bottom, and drives the lower shaft group to rotate.

The first detection component has the structure that: the lifting device comprises a first support plate arranged on an upper lifting plate, wherein a rotating shaft assembly is arranged on the first support plate in a penetrating manner, and the rotating shaft assembly is driven by a motor through a synchronous belt; an upper support plate is arranged above the rotating shaft assembly, guide posts are fixedly arranged on the bottom surface of the upper support plate at intervals, the guide posts downwards penetrate through the first support plate through guide sleeves, and the bottom ends of the guide posts are jointly provided with a lower support plate; the first support plate is provided with a balance cylinder, and the output end of the balance cylinder faces upwards and is supported on the bottom surface of the upper support plate; the bottom surface of the lower support plate is provided with a first measuring head assembly, the rotating shaft assembly penetrates through the lower support plate and the first measuring head assembly in sequence downwards, and the bottom end of the rotating shaft assembly is provided with a rotating rod which is clamped and matched with the center of the shaft assembly; and a measuring head which downwards faces to the top surface of the shaft group is arranged on one bottom surface of the measuring head assembly along the circumferential direction.

The structure of the second detection component is as follows: the device comprises a shaft seat arranged on an upper lifting plate, a fixed shaft assembly is assembled on the upper and lower penetrating shaft seats, a support plate is arranged on the top surface of the fixed shaft assembly in a connecting way through a pressure sensor, and a counterweight is arranged on the top surface of the support plate; the device also comprises a cylinder seat arranged on the upper lifting plate, and a pressurizing cylinder with an output end facing downwards towards the support plate is arranged on the cylinder seat; and a measuring head assembly II is arranged at the bottom end of the fixed shaft assembly.

Four groups of tool components are arranged on the rotary table, four stations are correspondingly arranged, and the four stations are a feeding pre-assembly station, a detection station, a bearing dismantling station and a reservation station in sequence along the rotation direction.

Sensor assemblies are respectively distributed outside the rotary table positioned at the two sides of the feeding pre-assembly station and the bearing dismantling station.

The beneficial effects of the utility model are as follows:

the utility model has compact and reasonable structure and convenient operation, the bearing outer end face distance detection is carried out by respectively feeding each shaft group to the feeding pre-assembly station of the rotary table, then the bearing outer end face distance detection is carried out by rotating to the detection station, the bearing dismounting station is carried out after jacking, finally the bearing dismounting station is rotated to the feeding pre-assembly station for meshing pre-assembly, and other stations outside the bearing housing are automatically transferred, thereby realizing the measurement of the bearing outer end face distance on the shaft system, effectively helping the accurate selection of the thickness of the gasket, ensuring the stable and reliable assembly between the shaft system and the shell, having accurate measurement, high efficiency, being capable of effectively matching the requirement of the existing production beat and having good practicability;

the utility model also has the following advantages:

the top surface of the supporting seat of the supporting shaft group on the tool assembly is provided with a three-flap type supporting structure, so that reliable supporting limit can be formed for the shaft group from the bottom surface circumference, on the one hand, the supporting seat can be switched from a supporting state of the supporting seat through a jacking piece which is circumferentially staggered with the three-flap type supporting structure, the supporting seat is supported by the jacking piece, the operation such as measuring the shaft group is facilitated, and the automatic operation is assisted;

the tool assembly is provided with the tool slide rail, and the supporting seat is arranged on the sliding table on the tool slide rail, so that after measurement, the shaft group can be meshed and preassembled according to actual needs, and the subsequent assembly and use are facilitated.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic layout of the various stations on the turntable of the present utility model.

Fig. 3 is a partial enlarged view at a in fig. 2.

Fig. 4 is a schematic view of the structure of the bearing removal station of the present utility model.

Fig. 5 is a schematic structural diagram of the tooling assembly of the present utility model.

Fig. 6 is a schematic structural view of the inspection station of the present utility model.

Fig. 7 is a schematic structural diagram of a first detection component of the present utility model.

Fig. 8 is a schematic structural diagram of a second detection component of the present utility model.

Wherein: 1. a turntable; 2. a tooling assembly; 3. a sensor assembly; 4. detecting a station; 5. a material moving lifting assembly; 6. a grabbing component; 7. a jacking mechanism; 10. a shafting;

20. a tool bottom plate; 21. a sliding table; 22. tool slide rail; 23. a support base; 24. a through hole;

41. a lower lifting cylinder; 42. a supporting stand; 43. a vertical slide rail; 44. an upper lifting cylinder; 45. detecting a first component; 46. a second detection component; 47. an upper lifting plate; 48. a jacking seat; 49. a lower lifting plate;

450. a first support plate; 451. a balancing cylinder; 452. a synchronous belt; 453. a motor; 454. an upper support plate; 455. a guide sleeve; 456. a rotating shaft assembly; 457. a lower support plate; 458. a first measuring head assembly; 459. a rotating lever;

461. a measuring head assembly II; 462. a dead axle assembly; 463. a shaft seat; 464. a pressurizing cylinder; 465. a counterweight; 466. a cylinder block;

61. a clamping jaw;

71. and lifting the column.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1 and 2, the automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission in the embodiment comprises a turntable 1 rotating in a horizontal plane, wherein tool components 2 are uniformly arranged at intervals on the edge of the top surface of the turntable 1, and each shaft group of a shafting 10 is supported on the tool components 2; each station corresponding to the tooling assembly 2 is arranged along the circumferential direction of the turntable 1, wherein one station is a feeding pre-assembly station, and a detection station 4 and a bearing dismantling station are sequentially arranged along the rotation direction; a material moving lifting assembly 5 is arranged on a fixed seat positioned in the center of the turntable 1, a grabbing assembly 6 is arranged on the side surface of the material moving lifting assembly 5 in a vertical moving mode, and the grabbing assembly 6 is positioned right above a material loading pre-assembly station, as shown in fig. 3.

After each shaft group is respectively fed to a feeding pre-assembly station of the rotary table, the shaft groups are rotated to a detection station 4 to detect the distance between the outer end faces of the bearings, then the shaft groups are rotated to a bearing dismantling station to detach the bearings on the corresponding shaft groups after jacking, finally the shaft groups are rotated to the feeding pre-assembly station to carry out meshing pre-assembly, and other stations outside the shaft groups are automatically transferred, so that the distance between the outer end faces of the bearings on the shaft system 10 is measured.

As shown in fig. 5, the structure of the single-set tooling assembly 2 is as follows: the device comprises a tooling bottom plate 20 assembled on the top surface of the turntable 1, wherein a supporting seat 23 corresponding to each shaft group of the shafting 10 is arranged on the top surface of the tooling bottom plate 20; the top surfaces of the single supporting seats 23 extend outwards along the circumferential interval to form a three-petal type supporting structure, and through holes 24 which are vertically communicated are formed in the tool bottom plate 20 which is positioned right below the interval position between the petals of the three-petal type supporting structure; the jacking mechanism 7 and the detection station 4 are respectively provided with a jacking piece, and the jacking pieces pass through the through holes 24 from bottom to top and then support the corresponding shaft groups.

In this embodiment, the three-lobe support structure on the top surface of the support base 23 may have a step or other structure to limit and position the supported shaft group horizontally.

The top surface of the supporting seat 23 of the supporting shaft group on the tool assembly 2 is provided with a three-flap type supporting structure, on one hand, reliable supporting limit can be formed for the shaft group from the bottom surface circumference, on the other hand, the supporting limit can be switched from a state that the supporting seat 23 is supported by a jacking piece which is staggered with the three-flap type supporting structure circumference, the supporting seat is supported by the jacking piece, the operation such as measuring the shaft group is convenient, and the automatic operation is assisted.

As shown in fig. 4, the jacking mechanism 7 has a structure as follows: the lifting device comprises a lifting cylinder arranged on the side surface of a fixed seat below the turntable 1, wherein a lifting plate is arranged at the output end of the lifting cylinder, and a plurality of lifting columns 71 corresponding to the shaft group are arranged on the top surface of the lifting plate; the jacking cylinder pushes the jacking column 71 upwards through the jacking plate, and the jacking column 71 upwards passes through the turntable 1 and the tooling bottom plate 20 and then upwards supports the corresponding shaft group, so that an operator can conveniently dismantle the bearing on the bottom end of the shaft in the shaft group.

Tool slide rails 22 are further arranged on the top surface of the tool bottom plate 20 at intervals, a sliding table 21 is arranged on the top surface of the tool slide rails 22 in a sliding mode, a group of supporting seats 23 are arranged on the sliding table 21, and upper through holes and lower through holes corresponding to the corresponding through holes 24 are formed in the sliding table 21; the shaft group supported on the supporting seat 23 on the sliding table 21 moves towards the other shaft group until contact engagement along with the movement of the sliding table 21 along the tool sliding rail 22; the end of the top surface of the sliding table 21 is provided with a handle convenient to operate, and the shaft group can be driven to approach and mesh by the pushing of an operator to realize the pre-assembly.

The tool assembly 2 is provided with a tool slide rail 22, and a support seat 23 is arranged on a sliding table 21 on the tool slide rail 22, and after measurement, the shaft group can be meshed and preassembled according to actual needs so as to facilitate subsequent assembly and use.

As shown in fig. 6, the structure of the detection station 4 is: the vertical sliding rail type turntable comprises a supporting vertical frame 42, wherein vertical sliding rails 43 are arranged at left and right intervals on the side surface of the supporting vertical frame 42, an upper lifting plate 47 and a lower lifting plate 49 are arranged on the vertical sliding rails 43 in a sliding manner, the upper lifting plate 47 is positioned above the turntable 1, the lower lifting plate 49 is positioned below the turntable 1, and the upper lifting plate 47 and the lower lifting plate 49 are mutually independent and move along the vertical sliding rails 43 in a lifting manner; the top surface of the lower lifting plate 49 is provided with a lifting seat 48 for supporting each corresponding shaft group in the shafting 10, and the top surface of the lifting seat 48 is provided with a support column which is staggered circumferentially relative to the three-flap type support structure on the support seat 23; the probe components corresponding to the shaft groups one by one are arranged on the bottom surface of the upper lifting plate 47.

In actual use, when the shaft group rotates to the detection station 4 along with the turntable 1, the lower lifting plate 47 firstly moves upwards relative to the supporting stand 42, the shaft group on the tooling assembly 2 of the turntable 1 is supported upwards through the supporting column, and then the upper lifting plate 47 moves downwards, so that the corresponding shaft group is detected by the measuring head assembly.

In the present embodiment, the movement of the upper lifting plate 47 relative to the vertical sliding rail 43 is realized by the upper lifting cylinder 44, and the movement of the lower lifting plate 49 relative to the vertical sliding rail 43 is realized by the lower lifting cylinder 41; guide assemblies can also be arranged between the bottom surface of the upper lifting plate 47 and the top surface of the lower lifting plate 49 so as to effectively ensure the relative position precision between the upper lifting plate 47 and the lower lifting plate 49 in the vertical direction, thereby helping to ensure the accuracy and reliability of measurement after movement.

The shafting 10 comprises three groups of shaft groups of a transmission shaft, a middle shaft and an input shaft which are axially parallel to each other, and three groups of measuring head assemblies corresponding to the three groups of shaft groups are arranged on the upper lifting plate 47, wherein two groups of measuring head assemblies are respectively arranged at the bottom end of a first detection assembly 45, and the other group of measuring head assemblies are arranged at the bottom end of a second detection assembly 46; a rotating rod 459 is arranged in the first detection assembly 45 penetrating the measuring head assembly up and down, and the rotating rod 459 drives the lower shaft group to rotate.

As shown in fig. 7, the first detection component 45 has a structure as follows: comprises a first support plate 450 arranged on the upper lifting plate 47, a rotating shaft assembly 456 is arranged on the first support plate 450 in a penetrating way, and the rotating shaft assembly 456 is driven by a motor 453 through a synchronous belt 452; an upper support plate 454 is arranged above the rotating shaft assembly 456, guide posts are fixedly arranged on the bottom surface of the upper support plate 454 at intervals, the guide posts downwards penetrate through the support plate I450 through the guide sleeves 455, and the bottom ends of the guide posts are jointly provided with a lower support plate 457; the first support plate 450 is provided with a balance cylinder 451, and the output end of the balance cylinder 451 faces upwards and is supported on the bottom surface of the upper support plate 454; a first measuring head assembly 458 is arranged on the bottom surface of the lower support plate 457, a rotating shaft assembly 456 penetrates through the lower support plate 457 and the first measuring head assembly 458 in sequence downwards, and a rotating rod 459 which is clamped and matched with the center of the shaft assembly is arranged at the bottom end of the rotating shaft assembly 456; the bottom surface of the first probe assembly 458 is provided with probes which face downwards towards the top surface of the shaft group along the circumferential direction.

In actual use, as the upper lifting plate 47 descends, the first detection assembly 45 descends, the rotating rod 459 at the bottom end of the rotating shaft assembly 456 is clamped and matched with the center of the shaft assembly, and the bottom surface of the first measuring head assembly 458 is close to the upper end surface of the bearing above the shaft assembly; the motor 453 is operated to drive the rotation shaft assembly 456 to rotate via the timing belt 452, so that the rotation shaft assembly is driven to rotate via the rotation rod 459, and the dynamic measurement can be performed on the top surface of the shaft assembly bearing by the pair of measurement head assemblies 458.

In this embodiment, the rotation shaft assembly 456 and the driven wheel in the transmission of the synchronous belt 452 may be in a circumferential spacing and axial movable assembly relationship, such as spline assembly, and may move relatively in the axial direction, so as to rotate synchronously in the circumferential direction.

In this embodiment, the upper support plate 454, the lower support plate 457 and the first probe assembly 458 can be vertically reduced in weight according to the actual measurement requirement by the operation of the balance cylinder 451, and after weight reduction, the bottom surface of the first probe assembly 458 can be contacted and attached to the top surface of the shaft group bearing during measurement according to the actual requirement.

As shown in fig. 8, the second detection component 46 has a structure as follows: the lifting device comprises a shaft seat 463 arranged on an upper lifting plate 47, a fixed shaft assembly 462 is assembled on the upper and lower penetrating shaft seat 463, a support plate is arranged on the top surface of the fixed shaft assembly 462 in a connecting manner through a pressure sensor, and a counterweight 465 is arranged on the top surface of the support plate; the device also comprises a cylinder seat 466 arranged on the upper lifting plate 47, and a pressurizing cylinder 464 with an output end facing downwards towards the support plate is arranged on the cylinder seat 466; the bottom end of the dead axle assembly 462 is provided with a second measuring head assembly 461.

In this embodiment, as the upper lifting plate 47 descends, the second detecting assembly 46 descends, and the bottom surface of the second measuring head assembly 461 at the lower part of the fixed shaft assembly 462 approaches and contacts with the top surface of the bearing of the shaft assembly, so as to perform measurement.

In this embodiment, the weight of the fixed shaft assembly 462 may be increased by selecting the weight 465 according to the actual measurement requirement, or the weight of the fixed shaft assembly 462 may be increased by operating the pressurizing cylinder 464.

Four groups of tool assemblies 2 are arranged on the rotary table 1, four stations are correspondingly arranged, and the four stations are a feeding pre-assembly station, a detection station 4, a bearing dismantling station and a reservation station in sequence along the rotation direction.

In actual use, each shaft group in the shafting 10 is fed by a feeding pre-assembly station, the shafting is rotated to a detection station 4 for detection, the bearing is removed by rotating to a bearing removing station, the removed bearing is assembled at a corresponding position of the outer shell, and then the shafting 10 is rotated to the feeding pre-assembly station through the turntable 1 for meshing pre-assembly.

The sensor assemblies 3 are respectively arranged outside the rotary table 1 positioned at the two sides of the feeding pre-assembly station and the bearing dismantling station and are respectively used for detecting the existence of the shaft group and the state of the shaft group, such as the lifting height of the shaft group in the bearing dismantling station, and the feeding pre-assembly station detects the existence of the shaft group and the pre-assembly state of the shaft group.

In this embodiment, after each shaft group is preassembled on the feeding preassembling station, the material moving lifting assembly 5 at the center of the turntable 1 works to drive the grabbing assembly 6 to move downwards, the clamping jaw 61 with the bottom surface of the grabbing assembly 6 grabs each shaft group, and then the material moving lifting assembly 5 drives the grabbing assembly 6 to move upwards, so that the shaft groups are separated from the tool assembly 2, and the subsequent transferring and assembling of the shaft groups are facilitated.

Since the tooling assembly 2 is supported upwards by the supporting seat 23, the supporting seat 23 only positions and supports the shaft assembly, and the clamping action of the clamping force and the like is not included, so that the shaft assembly can be passively removed from the supporting seat 23 after being grabbed by the clamping jaw 61 on the grabbing assembly 6 above.

Of course, the bottom clamping jaw 61 of the grabbing assembly 6 is arranged to be offset from the three-flap type supporting structure of the top surface of the supporting seat 2 in the circumferential direction.

In this embodiment, the bottom surface of the turntable 1 may be concentrically and fixedly equipped with a large gear, the large gear is meshed with a small gear circumferentially and externally, and the small gear is driven to rotate by power to drive the meshed large gear to rotate, and then drives the turntable 1 to rotate.

The utility model has simple operation and convenient use, realizes the measurement of the distance of the outer end face of the bearing on the shafting, effectively assists in the accurate selection of the thickness of the gasket, ensures the stable and reliable assembly between the shafting and the shell, has accurate measurement and high efficiency, can effectively match the requirement of the existing production beat, and has good practicability.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims (10)

1. Automatic measuring device of derailleur shafting bearing outer end face distance, including revolving stage (1) that rotate in the horizontal plane, its characterized in that: tool components (2) are uniformly arranged at intervals on the edge of the top surface of the turntable (1), and each shaft group of the shafting (10) is supported on the tool components (2); each station corresponding to the tooling assembly (2) is arranged along the circumference of the turntable (1), one station is a feeding pre-assembly station, and a detection station (4) and a bearing dismantling station are sequentially arranged along the rotation direction; a material moving lifting assembly (5) is arranged on a fixed seat positioned in the center of the turntable (1), a grabbing assembly (6) is arranged on the side surface of the material moving lifting assembly (5) in an up-and-down moving mode, and the grabbing assembly (6) is positioned right above the material loading pre-assembly station.

2. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 1, wherein: the structure of the single-group tool assembly (2) is as follows: the device comprises a tooling bottom plate (20) assembled on the top surface of a turntable (1), wherein a supporting seat (23) corresponding to each shaft group of a shafting (10) is arranged on the top surface of the tooling bottom plate (20); the top surfaces of the single supporting seats (23) extend outwards along the circumferential interval to form a three-petal type supporting structure, and through holes (24) which are vertically communicated are formed in a tool bottom plate (20) which is positioned right below the interval position between the petals of the three-petal type supporting structure; the lifting mechanism (7) and the detection station (4) are respectively provided with a lifting piece, and the lifting pieces pass through the through holes (24) from bottom to top and then support the corresponding shaft groups.

3. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 2, wherein: the jacking mechanism (7) has the structure that: the lifting device comprises a lifting cylinder arranged on the side surface of a fixed seat below a turntable (1), wherein a lifting plate is arranged at the output end of the lifting cylinder, and a plurality of lifting columns (71) corresponding to a shaft group are arranged on the top surface of the lifting plate; the jacking cylinder pushes the jacking column (71) upwards through the jacking plate, and the jacking column (71) upwards passes through the turntable (1) and the tooling bottom plate (20) and then upwards supports the corresponding shaft group.

4. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 2, wherein: the top surface of the tooling bottom plate (20) is also provided with tooling sliding rails (22) at intervals, the top surfaces of the tooling sliding rails (22) are provided with sliding tables (21) in a sliding manner, a group of supporting seats (23) are arranged on the sliding tables (21), and the sliding tables (21) are provided with upper through holes and lower through holes corresponding to the corresponding through holes (24); the shaft group supported on the supporting seat (23) on the sliding table (21) moves towards the other shaft group until contact engagement along with the movement of the sliding table (21) along the tool sliding rail (22); the end part of the top surface of the sliding table (21) is provided with a handle convenient to operate.

5. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 2, wherein: the structure of the detection station (4) is as follows: the vertical lifting device comprises a supporting vertical frame (42), wherein vertical sliding rails (43) are arranged on the side surface of the supporting vertical frame (42) at left and right intervals, an upper lifting plate (47) and a lower lifting plate (49) are arranged on the vertical sliding rails (43) in a sliding manner, the upper lifting plate (47) is positioned above a turntable (1), the lower lifting plate (49) is positioned below the turntable (1), and the upper lifting plate (47) and the lower lifting plate (49) move along the vertical sliding rails (43) independently; the top surface of the lower lifting plate (49) is provided with a lifting seat (48) for supporting each corresponding shaft group in the shafting (10), and the top surface of the lifting seat (48) is provided with a support column which is staggered circumferentially relative to a three-petal type support structure on the support seat (23); and the bottom surface of the upper lifting plate (47) is provided with measuring head assemblies which are in one-to-one correspondence with the shaft groups.

6. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 5, wherein: the shafting (10) comprises three groups of shaft groups of a transmission shaft, a middle shaft and an input shaft which are axially parallel to each other, three groups of measuring head assemblies corresponding to the three groups of shaft groups are arranged on the upper lifting plate (47), wherein two groups of measuring head assemblies are respectively arranged at the bottom end of a first detection assembly (45), and the other group of measuring head assemblies are arranged at the bottom end of a second detection assembly (46); a rotating rod (459) is arranged in the first detection assembly (45) penetrating through the measuring head assembly up and down, and the rotating rod (459) drives the lower shaft group to rotate.

7. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 6, wherein: the first detection component (45) is structured as follows: comprises a first support plate (450) arranged on an upper lifting plate (47), a rotating shaft assembly (456) is arranged on the first support plate (450) in a penetrating way, and the rotating shaft assembly (456) is driven by a motor (453) through a synchronous belt (452); an upper support plate (454) is arranged above the rotating shaft assembly (456), guide columns are fixedly arranged on the bottom surface of the upper support plate (454) at intervals, the guide columns penetrate through the support plate I (450) downwards through guide sleeves (455), and lower support plates (457) are jointly arranged at the bottom ends of the guide columns; a balance cylinder (451) is arranged on the first support plate (450), and the output end of the balance cylinder (451) faces upwards and is supported on the bottom surface of the upper support plate (454); a first measuring head assembly (458) is arranged on the bottom surface of the lower support plate (457), a rotating shaft assembly (456) penetrates through the lower support plate (457) and the first measuring head assembly (458) in sequence downwards, and a rotating rod (459) matched with the center clamping of the shaft assembly is arranged at the bottom end of the rotating shaft assembly (456); the bottom surface of the first measuring head assembly (458) is provided with measuring heads which face downwards to the top surface of the shaft group along the circumferential direction.

8. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 6, wherein: the second detection component (46) is structured as follows: the lifting device comprises a shaft seat (463) arranged on an upper lifting plate (47), a fixed shaft assembly (462) is assembled on the upper and lower penetrating shaft seats (463), a support plate is arranged on the top surface of the fixed shaft assembly (462) in a connecting manner through a pressure sensor, and a counterweight (465) is arranged on the top surface of the support plate; the device also comprises a cylinder seat (466) arranged on the upper lifting plate (47), and a pressurizing cylinder (464) with an output end facing downwards towards the support plate is arranged on the cylinder seat (466); and a measuring head assembly II (461) is arranged at the bottom end of the dead axle assembly (462).

9. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 1, wherein: four groups of tool assemblies (2) are arranged on the rotary table (1), four stations are correspondingly arranged, and the four stations are a feeding pre-assembly station, a detection station (4), a bearing dismantling station and a reservation station in sequence along the rotation direction.

10. The automatic measuring device for the distance between the outer end surfaces of the shafting bearings of the transmission according to claim 1, wherein: sensor assemblies (3) are respectively distributed outside the rotary table (1) positioned at the two sides of the feeding pre-assembly station and the bearing dismantling station.