Automatic assembly tool for road roller gearbox

Abstract

The invention relates to the technical field of assembly of parts of a gearbox for a road roller, and specifically proposes an automatic assembly tool for a gearbox for a road roller; the tooling table comprises a tooling table; an elastic lifting platform is assembled at the bottom end of the tabletop of the tooling table, a coaxial positioning fixture is installed on the tabletop of the elastic lifting platform, the coaxial positioning fixture comprises a rotating component, the rotating component comprises a rotating drum which is vertically rotated and driven and installed on the elastic lifting platform, a supporting platform is fixed on the top of the rotating drum; a plurality of inner support blocks which are commonly used for inner support, clamping and positioning the bearing hole of the bearing end cover are arranged on the supporting platform in a circumferential distribution, an adaptive inner support piece for clamping and positioning the inner ring hole of the bearing is fixed on the top of the inner support block, a cleaning brush for cleaning the inner wall of the bearing hole is embedded and slidably fitted on the inner support block; the tooling provided by the invention changes the existing crimping assembly method between the bearing and the bearing mounting piece in the gearbox, can provide automatic auxiliary assembly, and improves assembly precision and assembly quality.

Description

Technical Field

[0001] The invention relates to the technical field of assembling parts of a road roller gearbox, and specifically provides an automatic assembly tool for a road roller gearbox. Background Art

[0002] The gearbox of a road roller is an important part of the transmission system of the road roller. Its main function is to transmit the power of the engine to the driving wheel and change the output speed and torque through different gear combinations to adapt to different working conditions and road compaction requirements. The gearbox of a road roller is composed of input shaft, output shaft, gear set, shift mechanism and housing. In order to improve the stability and reliability of the transmission structure, the input shaft, output shaft and gear shaft in the gear set need to be equipped with bearings, and the bearings are fixedly assembled on the bearing seat or the corresponding housing, such as Fig.12 The figure shows a bearing end cover housing structure assembled on the input shaft end of a road roller gearbox. A bearing hole for assembling the bearing is processed in the bearing end cover. In order to achieve the installation and fixation of the bearing and avoid axial or radial movable displacement of the bearing in the bearing hole, the bearing and the bearing hole are tightly installed by interference fit. During actual installation, it is necessary to use pressure equipment to press the bearing into the bearing hole of the bearing end cover.

[0003] Under the existing technology, during actual installation, the bearing end cover is first placed flat on the workbench of the pressure equipment, and then the bearing is placed directly on the bearing hole of the bearing end cover. Finally, with the help of a pressure block, the bearing is pressed into the bearing hole through the pressure equipment. Although the above assembly method is quick and simple, it has the following problems: 1) Generally, the bearing ring and the bearing hole of the bearing end cover are basically processed with chamfers. When the bearing is placed at the bearing hole, the chamfer is basically used to achieve the crimping assembly guide during crimping. However, the bearing hole and the bearing are installed by interference fit, which requires high installation accuracy. Only the chamfer structure is used to achieve the crimping guide, which has poor guiding accuracy and lacks guiding stability. Therefore, the accuracy of the crimping assembly of the bearing and the bearing hole is affected, which easily causes the bearing assembly to tilt, and there is a large deviation between the center axis and the center axis of the bearing hole, which exceeds the assembly error range and affects the subsequent assembly fit between the gearbox output shaft and the bearing.

[0004] 2) The bearing end cover is basically a steel casting, and the bearing hole needs to be further precision-processed. The bearing end cover is easily contaminated with oil, dust and other debris during the processing, production, manufacturing and transportation. In addition, as a steel part, the bearing end cover is easily magnetized on the surface, which will then absorb particles such as metal chips. Therefore, before actual assembly, according to the operating specifications, the inner wall of the bearing hole needs to be manually cleaned. Manual cleaning is not only troublesome, but also prone to inadequate cleaning of the bearing hole, and manual failure to operate according to specifications and directly ignoring the cleaning of the bearing hole. When there are dust, metal chips and other granular impurities on the inner wall of the bearing hole, the bearing will be inaccurately positioned and difficult to install during assembly. When the assembly is completed and actually used, it is easy to cause abnormal vibration and noise, and will aggravate wear and affect the service life of the bearing. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an automatic assembly tool for a road roller gearbox, which is used to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an automatic assembly tool for a roller gearbox, which is used for crimping and assembling the bearing end cover and the bearing in the roller gearbox, and includes a tooling table; the bottom end of the tooling table is equipped with an elastic lifting platform which descends when pressed down, and a coaxial positioning fixture is installed on the surface of the elastic lifting platform, and the coaxial positioning fixture includes a rotating component, and the rotating component includes a rotating drum which is vertically rotatably installed on the elastic lifting platform, and a cylindrical supporting platform which is coaxially arranged with the rotating drum is fixed on the top of the rotating drum, and the supporting platform passes through the tooling table surface.

[0007] The support platform is circumferentially distributed with a plurality of inner support blocks which are used to support, clamp and position the bearing hole of the bearing end cover. The top end of the inner support block is not higher than the top surface of the support platform. The top end of the inner support block is fixed with a self-adaptive inner support member for clamping and positioning the inner ring hole of the bearing, and the self-adaptive inner support member is located above the support platform surface; the inner support block is embedded with a cleaning brush for cleaning the inner wall of the bearing hole and is slidingly fitted thereon; both the cleaning brush and the inner support block are radially slidingly arranged along the support platform; the bottom end of the support platform is fixedly equipped with a driving component which synchronously drives each inner support block and the cleaning brush to slide in opposite directions relative to each other; when the inner support block is in internal support clamping contact with the inner wall of the bearing hole, the cleaning brush is in a disengaged state from the inner wall of the bearing hole.

[0008] The tooling table is also equipped with a crimping assembly; the crimping assembly includes a crimping block that is cylindrical and coaxially arranged above the supporting table.

[0009] Preferably, the inner support block is provided with a built-in slide groove extending radially through the support platform, and the built-in slide groove is an open structure at the bottom end of the inner support block; the inner support block is provided with inner support side plates located on both horizontal sides of the built-in slide groove that are clamped in contact with the bearing hole; the cleaning brush includes a brush body plate slidably installed in the built-in slide groove, and a detachable brush body is fixed on the plate surface of the brush body plate facing away from the center of the support platform.

[0010] Preferably, an extension plate is provided flush with the top end of the inner support block, and the extension plate extends to a side close to the center of the supporting platform; and the adaptive inner support member is fixed on the upper end surface of the extension plate.

[0011] Preferably, the driving assembly includes a travel block which is coaxially arranged with the supporting platform and driven to move along the axial direction of the supporting platform, the travel block is hinged with a plurality of driving connecting rods which are arranged one-to-one corresponding to a plurality of inner support blocks, each of the driving connecting rods is correspondingly hinged with a driving swing arm, the driving swing arm is provided with two extension holes which are distributed and extended along the arm length direction, the driving swing arm is hinged on the supporting platform at a position between the two extension holes; a side extension block which extends toward one side of the center of the supporting platform is horizontally arranged on the brush body plate; the driving swing arm is located between the extension plate and the side extension block at the corresponding position, pins are horizontally fixed on the bottom end of the extension plate and the side extension block, and the two pins are slidably arranged in the two extension holes of the driving swing arm in a one-to-one correspondence.

[0012] Preferably, the self-adaptive inner support member includes a vertical plate fixed on the extension plate, a guide rod is installed on the vertical plate in a radially sliding manner along the support platform, a ball disk is fixed on the end of the guide rod away from the center of the support platform; an inner support spring is sleeved on the guide rod, and both ends of the inner support spring are respectively fixed on the vertical plate and the ball disk, and the ball disk is movably embedded with balls.

[0013] Preferably, the inner support side plate is movably inlaid with a plurality of rollers arranged vertically.

[0014] Preferably, the elastic lifting platform includes a guide column frame fixed to the bottom end of the workbench table, a bearing platform is vertically slidably mounted above the guide column frame, and at least one return spring is vertically connected between the bearing platform and the guide column frame; the rotating drum is rotatably mounted on the bearing platform.

[0015] Preferably, the crimping assembly also includes a plurality of columns vertically fixed on the workbench, and a passive plate is vertically slidably mounted on the plurality of columns. A compression spring is sleeved on the columns, and the two ends of the compression spring are respectively fixed on the passive plate and the workbench; a column rod is vertically fixed at the bottom end of the passive plate, and the crimping block is fixed at the bottom end of the column rod.

[0016] Preferably, the support platform is provided with a center groove extending axially from the bottom end, and a plurality of radial guide grooves are circumferentially distributed on the support platform and are arranged in one-to-one correspondence with a plurality of inner support blocks. The radial guide grooves are open on the side walls of the support platform and at the upper and lower ends, and the radial guide grooves are connected to the center groove; the inner support blocks are slidably installed in the radial guide grooves, and a hinge seat is fixed in the center groove corresponding to each radial guide groove, and the driving swing arm is hinged on the corresponding hinge seat.

[0017] Preferably, the top end surfaces of both the inner support block and the extension plate are flush with the table surface of the supporting platform.

[0018] The above technical scheme has the following advantages or beneficial effects: The present invention provides an automatic assembly tool for a roller gearbox, which changes the existing assembly method of simple placement and direct pressing when the bearings and corresponding parts in the roller gearbox are crimped and assembled. A coaxial positioning fixture is provided, which can realize the automatic overlap and alignment of the center axis between the bearing and the bearing end cover bearing hole, and a support platform is provided to provide crimping support, avoiding the problems of center axis alignment deviation and crimping assembly tilt during the crimping process, and can achieve smooth press-in assembly, greatly improving the assembly accuracy and assembly quality. In addition, a cleaning brush is equipped with the inner support block, and the position state switching of the inner support block and the cleaning brush can be realized through the driving component driven by the inner support clamping, and a rotatable driving setting is adopted for the coaxial positioning fixture, so that the inner wall of the bearing hole can be automatically and quickly cleaned instead of manually before crimping, avoiding the trouble of manual cleaning, and solving the problems of inadequate cleaning due to manual cleaning and manual neglect of cleaning due to non-standard operation, and eliminating the problem of impurities in the bearing hole affecting the bearing assembly. In summary, the tooling provided by the present invention changes the existing press-fit assembly method between the bearing and the bearing mounting member in the gearbox, can provide automatic auxiliary assembly, and improves assembly accuracy and assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings, which are not drawn to scale, with emphasis on illustrating the subject matter of the present invention.

[0020] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of an automatic assembly tool for a road roller gearbox provided by the present invention.

[0021] Figure 2 The present invention is a top view of an automatic assembly tool for a road roller gearbox.

[0022] Figure 3 yes Figure 2 Sectional view of AA.

[0023] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0024] Figure 5 It is a three-dimensional schematic diagram of the relative positions of the tooling table, elastic lifting table, coaxial positioning fixture and bearing.

[0025] Figure 6 It is a three-dimensional structural diagram of the coaxial positioning fixture without the rotating component assembled.

[0026] Figure 7 yes Figure 6 The assembly structure shown is a bottom view when the cylinder base and the driving cylinder are not assembled.

[0027] Figure 8 It is a three-dimensional structural diagram of the supporting platform.

[0028] Fig. 9 It is a three-dimensional assembly drawing of the drive component, the inner support block and the cleaning brush assembly.

[0029] Fig.10 It is a three-dimensional structural diagram of the coordinated installation of the self-adaptive inner support member and the inner support block.

[0030] Fig.11 It is a three-dimensional structural diagram of the cleaning brush and the driving swing arm assembly.

[0031] Fig.12 It is a schematic diagram of the three-dimensional structure of the bearing end cover.

[0032] In the figure: 1, tooling table; 11, avoidance circular hole; 2, elastic lifting table; 21, guide column frame; 22, bearing table; 221, guide column; 222, reset spring; 3, coaxial positioning fixture; 31, rotating assembly; 311, rotating drum; 32, supporting table; 321, center groove; 322, radial guide groove; 323, hinge seat; 33, inner support block; 331, built-in slide groove; 332, inner support side plate; 3321, roller; 333, extension plate; 34, self-adaptive inner support member; 341, vertical plate; 342, guide rod; 343, ball plate; 344, inner support spring; 345, ball; 35, cleaning brush; 351, brush body plate; 3511, side extension block; 352, detachable brush body; 36, driving assembly; 361, cylinder seat; 362, driving cylinder; 363, travel block; 364, driving connecting rod; 365, driving swing arm; 3651, extension hole; 4, crimping assembly; 41, column; 42, passive plate; 43, compression spring; 44, column rod; 441, crimping block; 5, bearing end cover; 51, bearing hole; 6, bearing. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Fig.12 As shown, an automatic assembly tool for a road roller gearbox is used for crimping and assembling a bearing end cover 5 and a bearing 6 in the road roller gearbox. The assembly tool is used in conjunction with an existing pressure equipment for crimping, and the assembly tool comprises a tool table 1; the tool table 1 can be fixedly installed on a workbench of the pressure equipment, and the tool table 1 is suspended as a whole through a supporting cushion block; during actual assembly, the bearing end cover 5 can be directly placed on the table of the tool table 1, and a avoidance circular hole 11 is provided on the tool table 1 to avoid the installation position of the bearing hole 51 of the bearing end cover 5, and the diameter of the avoidance circular hole 11 is larger than the outer ring diameter of the bearing 6 to be installed The bottom of the workbench 1 is equipped with an elastic lifting platform 2, which is located below the avoidance circular hole 11. The elastic lifting platform 2 includes a guide column frame 21 welded to the bottom of the workbench 1, and a bearing platform 22 in the shape of a disc and coaxially arranged with the avoidance circular hole 11 is horizontally arranged above the guide column frame 21. Four guide columns 221 uniformly distributed around the central circumference of the bearing platform 22 are welded to the bottom of the bearing platform 22, and the four guide columns 221 are vertically penetrated and slidably installed on the guide column frame 21; a reset spring 222 is sleeved on the guide column 221, and the two ends of the reset spring 222 are respectively welded to the bearing platform 22 and the guide column frame 21.

[0036] like Figure 1 , Figure 4 , Figure 6 , Figure 7 and Fig.12As shown, a coaxial positioning fixture 3 is installed on the bearing platform 22, and the coaxial positioning fixture 3 includes a rotating component 31. The rotating component 31 includes a rotating drum 311 vertically rotatably installed on the bearing platform 22. A motor can be installed at the bottom end of the bearing platform 22. The rotating drum 311 is fixed on the output shaft of the motor and can be driven by the motor. The direct drive of the motor is an optional method in the prior art. The motor is not shown in the accompanying drawings; a cylindrical supporting platform 32 is welded to the top of the rotating drum 311 and is coaxially arranged with it. The supporting platform 32 passes through the avoidance circular hole 11, and the table surface of the supporting platform 32 is used to directly and horizontally support the bearing 6 to be crimped. When the bearing end cover 5 is placed on the tooling table 1, and when the reset spring 222 is not subjected to an active downward external force, the supporting platform 32 is at a position height through the bearing hole 51.

[0037] like Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.12 As shown, the support platform 32 is provided with a center groove 321 extending axially from the bottom end, and the center groove 321 does not pass through the top of the support platform 32. Three radial guide grooves 322 are evenly distributed on the circumference of the support platform 32. The radial guide grooves 322 are open on the side walls and the upper and lower ends of the support platform 32, and the radial guide grooves 322 are connected to the center groove 321. Three inner support blocks 33 are distributed on the circumference of the support platform 32 for clamping and positioning the bearing hole 51 of the bearing end cover 5. The three inner support blocks 33 are slidably installed in the three radial guide grooves 322 in a one-to-one correspondence; the inner support blocks 33 are installed in the three radial guide grooves 322 in a one-to-one correspondence; the inner support blocks A built-in slide groove 331 is provided on 33 and extends radially through the support platform 32. The built-in slide groove 331 is an open structure at the bottom end of the inner support block 33; the inner support block 33 is located on both sides of the built-in slide groove 331 horizontally for inner support side plates 332 that are in clamping contact with the bearing hole 51; in order to reduce the contact resistance of the inner support block 33 along the axial movement of the bearing hole 51 during the crimping process without affecting the provision of effective inner support clamping force, a plurality of vertically arranged rollers 3321 are movably embedded on the inner support side plates 332, and the inner support block 33 is in clamping contact with the inner wall of the bearing hole 51 through two rows of rollers 3321. An extension plate 333 is flush with the top end of the inner support block 33, and the extension plate 333 extends to one side close to the center of the support platform 32; in order to compensate for the missing supporting surface at the radial guide groove 322 on the support platform 32, in this embodiment, the overall top end surface of the inner support block 33 is flush with the surface of the support platform 32, and the top end surface of the inner support block 33 and the surface of the support platform 32 are used to jointly support the bearing 6 to be crimped.

[0038] like Figure 1 , Figure 4 , Figure 6 , Fig. 9 and Fig.10 As shown, a self-adaptive inner support member 34 for clamping and positioning the inner ring hole of the bearing 6 is fixed to the top of the extension plate 333 of each support platform 32, and the distribution centers of the three self-adaptive inner support members 34 coincide with the distribution centers of the three inner support blocks 33, and are all evenly distributed around the circumference of the central axis of the support platform 32; the self-adaptive inner support member 34 is located above the surface of the support platform 32; the self-adaptive inner support member 34 includes a vertical plate 341 welded on the extension plate 333, and a guide rod 342 is installed on the vertical plate 341 along the radial sliding fit of the support platform 32, and a ball plate 343 is welded on the end of the guide rod 342 away from the center of the support platform 32; an inner support spring 344 is sleeved on the guide rod 342, and the two ends of the inner support spring 344 are respectively welded to the vertical plate 341 and the ball plate 343, and the ball plate 343 is movably inlaid with balls 345.

[0039] like Figure 4 , Figure 6 , Figure 7 , Fig. 9 , Fig.11 and Fig.12 As shown, a cleaning brush 35 for cleaning the inner wall of the bearing hole 51 is embedded and slidably mounted on the inner support block 33; both the cleaning brush 35 and the inner support block 33 are slidably arranged along the radial direction of the support platform 32; the cleaning brush 35 includes a brush body plate 351 slidably mounted in the built-in slide groove 331, and a detachable brush body 352 is fixed on the plate surface of the brush body plate 351 facing away from the center of the support platform 32. The detachable brush body 352 is specifically composed of a self-adhesive cloth and nylon bristles woven on the adhesive cloth. The adhesive cloth can be directly attached to the plate surface of the brush body plate 351. The cleaning brush 35 is a consumable material and is also convenient for quick replacement. A side extension block 3511 extending toward one side of the center of the support platform 32 is horizontally welded on the brush body plate 351.

[0040] like Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the bottom end of the support platform 32 is fixedly equipped with a driving assembly 36 for synchronously driving each inner support block 33 and the cleaning brush 35 to slide in opposite directions relative to each other; the driving assembly 36 includes a cylinder seat 361 fixed to the bottom end surface of the support platform 32 by screws, and the bottom end surface of the cylinder seat 361 is vertically fixed with a driving cylinder 362 by bolts, and the telescopic rod of the driving cylinder 362 extends into the central groove 321 along the central axis of the support platform 32, and a travel block 363 is welded to the top of the telescopic rod of the driving cylinder 362, and three driving connecting rods 364 corresponding to the three inner support blocks 33 are hinged on the travel block 363, and a driving swing arm 365 is correspondingly hinged on each driving connecting rod 364, and the driving swing arm 365 is hinged on the driving swing arm 365. Two extension holes 3651 are distributed and extended along the arm length direction, the distribution midpoint between the two extension holes 3651 coincides with the arm length midpoint of the driving swing arm 365, three hinge seats 323 corresponding to the three radial guide grooves 322 are welded in the central groove 321, and the driving swing arm 365 is hinged on the corresponding hinge seat 323 at the midpoint between the two extension holes 3651; the driving swing arm 365 is located between the extension plate 333 and the side extension block 3511 at the corresponding position, and pins are horizontally fixed on the bottom end of the extension plate 333 and the side extension block 3511, and the two pins are slidably arranged in the two extension holes 3651 of the driving swing arm 365 in a one-to-one manner.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the tooling table 1 is also equipped with a crimping assembly 4; the crimping assembly 4 includes two columns 41 vertically welded on the tooling table 1, and a passive plate 42 is vertically slidably mounted on the two columns 41, and a compression spring 43 is sleeved on the column 41, and the two ends of the compression spring 43 are respectively welded to the passive plate 42 and the tooling table 1; a column 44 is vertically welded at the bottom end of the passive plate 42, and a crimping block 441 is welded to the bottom end of the column 44; the column 44, the crimping block 441 and the avoidance circular hole 11 are coaxially arranged, and the diameter of the crimping block 441 is larger than the diameter of the column 44, but smaller than the outer ring diameter of the bearing 6 to be assembled. The passive plate 42 is located directly below the driving platen of the pressure equipment.

[0042] Before assembly, the support platform 32 extends from the avoidance circular hole 11, the cleaning brush 35 is in an extended state from the built-in slide groove 331, and the cleaning radius of the cleaning brush 35 around the central axis of the support platform 32 is greater than the radius of the bearing hole 51 of the bearing end cover 5, that is, the detachable brush body 352 can effectively contact the inner wall of the bearing hole 51.

[0043] During the specific installation, first place the bearing end cover 5 to be installed on the table top of the workbench 1. During the placement process, the three cleaning brushes 35 are passively extended into the bearing hole 51. At this time, the bearing hole 51 is basically at the avoidance circular hole 11. Then start the rotating assembly 31, and drive the support platform 32 to rotate through the rotating drum 311, thereby indirectly driving the three cleaning brushes 35 to rotate accordingly. The cleaning brush 35 automatically cleans along the inner wall of the bearing hole 51, thereby cleaning the impurities that may exist on the inner wall of the bearing hole 51. Through the automatic cleaning before assembly, on the one hand, it can replace manual automatic cleaning, and on the other hand, it avoids the problem of inadequate manual cleaning and ignoring cleaning due to non-standard operation, thereby eliminating various problems during and after assembly caused by inadequate cleaning of the inner wall of the bearing hole 51. It should be added that the cleaning brush 35 can be regularly cleaned by a high-pressure air gun.

[0044] After the bearing hole 51 is cleaned, the bearing 6 can be placed on the top surface of the support platform 32, and the three self-adaptive inner support members 34 can be extended into the inner ring hole of the bearing 6. Then, the driving cylinder 362 is started to move the travel block 363 upward, and the travel block 363 synchronously drives the three driving swing arms 365 to rotate around their respective hinge seats 323 through the three driving connecting rods 364, and then drives the inner support block 33 to slide along the radial guide groove 322 in the direction away from the center of the support platform 32 through the driving swing arm 365, and synchronously drives the cleaning brush 35 to slide along the built-in slide groove 331 in the direction close to the center of the support platform 32. The cleaning brush 35 and the inner support block 33 move in opposite directions. On the one hand, the cleaning brush 35 is separated from the bearing hole 5 1, so as to prevent the residual impurities on the cleaning brush 35 during the assembly process from falling on the inner wall of the bearing hole 51 again. On the other hand, the three inner support blocks 33 are clamped on the inner wall of the bearing hole 51 by the rollers 3321, so that the central axis of the bearing hole 51 and the central axis of the bearing stand 22 are fixedly coincident by the inner support clamping method. At the same time, the self-adaptive inner support member 34 moves synchronously with the inner support block 33, and then the ball 345 is adaptively clamped on the inner wall of the inner ring hole of the bearing 6 by the inner support spring 344, so that the central axis of the bearing 6 and the central axis of the bearing stand 22 are in a coincident state through the cooperation of the three self-adaptive inner support members 34, so that the central axes of the bearing 6 and the bearing hole 51 are in a coincident state.

[0045] Then, the pressure equipment starts to press down, driving the pressure plate to gradually press down the passive plate 42, so that the compression spring 43 is gradually compressed, and the crimping block 441 moves down accordingly and is pressed and contacted with the upper end of the bearing 6. At this time, based on the coincidence of the central axes of the bearing 6 and the bearing hole 51, the bearing 6 is pressed up and down between the crimping block 441 and the support platform 32, thereby further enhancing the stability of the coincidence of the central axes of the bearing 6 and the bearing hole 51, avoiding the problems of deviation of the central axis and tilt of the crimping when the bearing 6 is crimped, and greatly improving the accuracy of the crimping assembly. Subsequently, the pressure continues to be pressed down, and the support platform 32 moves down synchronously, and the inner support block 33 rolls downward along the inner wall of the bearing hole 51 through the roller 3321, while the reset spring 222 is compressed, and the bearing platform 22 drops synchronously accordingly. The bearing 6 is gradually and slowly pressed down and steadily into the bearing hole 51 under the state of being clamped up and down. When it is pressed down to the predetermined position, the pressure equipment stops pressing down.

[0046] Next, the driving pressure plate of the pressure equipment rises and resets, and under the action of the compression spring 43, the passive plate 42 is reset synchronously, and the crimping block 441 is separated from the bearing 6 and resets to the initial height; then, the driving assembly 36 is started again, so that the adaptive inner support 34 releases the clamping of the bearing 6, and finally, the bearing end cover 5 that has completed the crimping assembly of the bearing 6 is removed from the workbench 1, and under the action of the reset spring 222, the bearing table 22 and the coaxial positioning fixture 3 are reset and rise to the initial height.

[0047] It should be supplemented that the assembly tool provided by the present invention is suitable for the special assembly of parts of corresponding sizes in the gearbox of a road roller.

[0048] The present invention provides an automatic assembly tool for a roller gearbox, which changes the existing assembly method of simple placement and direct pressing when the bearing 6 and the corresponding parts are crimped and assembled in the roller gearbox. A coaxial positioning fixture 3 is provided, which can realize the automatic overlap and alignment of the central axis between the bearing 6 and the bearing hole 51 of the bearing end cover 5, and a support platform 32 is provided to provide crimping support, thereby avoiding the problems of central axis deviation and crimping assembly tilt during the crimping process, and can realize smooth press-in assembly, greatly improving the assembly accuracy and the assembly quality. In addition, a cleaning brush 35 is equipped with the inner support block 33, and the position state switching of the inner support block 33 and the cleaning brush 35 can be realized by a driving component 36 driven by the inner support clamping. The coaxial positioning fixture 3 is rotatably driven, so that before crimping, the inner wall of the bearing hole 51 can be automatically and quickly cleaned instead of manually, thereby avoiding the trouble of manual cleaning, and solving the problems of inadequate cleaning and manual neglect of cleaning due to non-standard operation, and eliminating the problem of impurities in the bearing hole 51 affecting the assembly of the bearing 6. In summary, the tooling provided by the present invention changes the existing crimping assembly method between the bearing 6 and the bearing 6 mounting member in the gearbox, can provide automatic auxiliary assembly, and improves assembly accuracy and assembly quality.

[0049] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0051] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. An automatic assembly tool for a road roller gearbox, used for crimping and assembling a bearing end cover (5) and a bearing (6) in a road roller gearbox, characterized in that: The utility model comprises a tooling table (1); the bottom end of the table top of the tooling table (1) is equipped with an elastic lifting table (2) which descends when pressed downward; the table top of the elastic lifting table (2) is equipped with a coaxial positioning fixture (3); the coaxial positioning fixture (3) comprises a rotating assembly (31); the rotating assembly (31) comprises a rotating drum (311) which is vertically rotatably mounted on the elastic lifting table (2); a supporting table (32) which is cylindrical and coaxially arranged with the rotating drum (311) is fixed at the top end of the rotating drum (311); the supporting table (32) passes through the table top of the tooling table (1); The support platform (32) is provided with a plurality of inner support blocks (33) which are used to support and clamp the bearing hole (51) of the bearing end cover (5) in a circumferentially distributed manner. The top of the inner support block (33) is not higher than the top surface of the support platform (32). The top of the inner support block (33) is fixed with a self-adaptive inner support member (34) which is used to clamp and position the inner ring hole of the bearing (6). The self-adaptive inner support member (34) is located above the surface of the support platform (32). The inner support block (33) is embedded with a sliding fitting. A cleaning brush (35) is provided for cleaning the inner wall of the bearing hole (51); both the cleaning brush (35) and the inner support block (33) are arranged to slide radially along the support platform (32); a driving assembly (36) is fixedly mounted at the bottom end of the support platform (32) for synchronously driving each inner support block (33) and the cleaning brush (35) to slide in opposite directions relative to each other; when the inner support block (33) is in clamping contact with the inner wall of the bearing hole (51), the cleaning brush (35) is in a disengaged state from the inner wall of the bearing hole (51); The tooling table (1) is also equipped with a crimping assembly (4); the crimping assembly (4) comprises a crimping block (441) which is cylindrical and coaxially arranged above the supporting table (32); The inner support block (33) is provided with an inner slide groove (331) extending radially through the support platform (32), and the inner slide groove (331) is an open structure at the bottom end of the inner support block (33); the inner support block (33) has inner support side plates (332) located on both sides of the inner slide groove (331) in horizontal position and in clamping contact with the bearing hole (51); the cleaning brush (35) comprises a brush body plate (351) slidably mounted in the inner slide groove (331), and a detachable brush body (352) is fixed on the plate surface of the brush body plate (351) facing away from the center of the support platform (32); An extension plate (333) is provided flush with the top end of the inner support block (33), and the extension plate (333) extends toward a side close to the center of the support platform (32); the self-adaptive inner support member (34) is fixed on the upper end surface of the extension plate (333); The driving assembly (36) comprises a travel block (363) coaxially arranged with the supporting platform (32) and driven to move along the axial direction of the supporting platform (32); the travel block (363) is hinged with a plurality of driving connecting rods (364) arranged one-to-one corresponding to the plurality of inner supporting blocks (33); each of the driving connecting rods (364) is correspondingly hinged with a driving swing arm (365); the driving swing arm (365) is provided with two extension holes (3651) distributed and extending along the length direction of the arm; the driving swing arm (365) is provided with two extension holes (3651) located at the two extension holes. The position between the long holes (3651) is hinged on the support platform (32); a side extension block (3511) extending toward one side of the center of the support platform (32) is horizontally arranged on the brush body plate (351); the driving swing arm (365) is located between the extension plate (333) and the side extension block (3511) at the corresponding position, and pins are horizontally fixed on the bottom end of the extension plate (333) and the side extension block (3511), and the two pins are slidably arranged in two elongated holes (3651) of the driving swing arm (365) in a one-to-one correspondence. The support platform (32) is provided with a central groove (321) extending axially from the bottom end, and a plurality of radial guide grooves (322) are provided on the support platform (32) in a circumferential distribution and are arranged in a one-to-one correspondence with a plurality of inner support blocks (33). The radial guide grooves (322) are openly arranged on the side wall and the upper and lower ends of the support platform (32), and the radial guide grooves (322) are connected to the central groove (321); the inner support blocks (33) are slidably installed in the radial guide grooves (322), and an articulated seat (323) is fixed in the central groove (321) corresponding to each radial guide groove (322), and the driving swing arm (365) is hinged on the corresponding articulated seat (323).

2. The automatic assembly tool for a road roller gearbox according to claim 1, characterized in that: The self-adaptive inner support member (34) comprises a vertical plate (341) fixed on the extension plate (333); a guide rod (342) is mounted on the vertical plate (341) in a radially sliding manner along the support platform (32); a ball plate (343) is fixed to one end of the guide rod (342) away from the center of the support platform (32); an inner support spring (344) is sleeved on the guide rod (342); two ends of the inner support spring (344) are respectively fixed to the vertical plate (341) and the ball plate (343); and balls (345) are movably embedded on the ball plate (343).

3. The automatic assembly tool for a road roller gearbox according to claim 1, characterized in that: The inner supporting side plate (332) is movably inlaid with a plurality of rollers (3321) arranged vertically.

4. The automatic assembly tool for a road roller gearbox according to claim 1, characterized in that: The elastic lifting platform (2) comprises a guide column frame (21) fixed to the bottom end of the tabletop of the tooling platform (1); a bearing platform (22) is vertically slidably mounted above the guide column frame (21); at least one return spring (222) is vertically connected between the bearing platform (22) and the guide column frame (21); and the rotating drum (311) is rotatably mounted on the bearing platform (22).

5. The automatic assembly tool for a road roller gearbox according to claim 1, characterized in that: The crimping assembly (4) further comprises a plurality of columns (41) vertically fixed on the workbench (1), a passive plate (42) being vertically slidably mounted on the plurality of columns (41), a compression spring (43) being sleeved on the columns (41), and two ends of the compression spring (43) being respectively fixed on the passive plate (42) and the workbench (1); a column rod (44) being vertically fixed at the bottom end of the passive plate (42), and the crimping block (441) being fixed at the bottom end of the column rod (44).

6. The automatic assembly tool for a road roller gearbox according to claim 1, characterized in that: The top surfaces of both the inner support block (33) and the extension plate (333) are arranged flush with the table surface of the supporting table (32).

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