Tool for assembling planet gear
By designing tooling for planetary gear assembly and utilizing magnetic adsorption and limit pin guide shaft structure, the problems of tooth tilt and safety hazards in the assembly of large and medium-sized planetary gear systems were solved, and automatic alignment and smooth assembly were achieved.
Patent Information
- Application Number
- CN202422989905.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-05
AI Technical Summary
During the assembly process of large and medium-sized planetary gear systems, the planetary gears are easily tilted relative to the rotation axis, resulting in the teeth being unable to align, causing tooth collisions, and requiring the cooperation of multiple people to operate, posing a safety hazard.
A tooling for assembling planetary gears is designed, including a base, a guide shaft, a compression spring, a fitting limit block and a screw shaft. It is attached to the inner gear ring through magnetic force, and the guide shaft and limit pin are used to limit the rotation of the planetary gear to ensure that the teeth and tooth grooves are aligned. The position is adjusted by the screw shaft to achieve automatic alignment and assembly.
It achieves accurate alignment between the planetary gear teeth and the inner ring gear grooves, reduces assembly difficulty, reduces manpower requirements, eliminates safety hazards, and is suitable for the smooth assembly of large and medium-sized planetary gear trains.
Smart Images
Figure CN223441591U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of workshop equipment more particularly to a kind of tool for planetary gear assembly. BACKGROUND
[0002] Planetary gear, planet carrier and inner gear ring are usually necessary component parts of planetary gear train.In assembly, generally first planetary gear and planet carrier are assembled, and then planet carrier is assembled into inner gear ring together with planetary gear.There are more than two planetary gears rotatably connected on planet carrier by bearing, and bearing usually has certain play, so that planetary gear is easy to tilt relative to rotation axis.When planet carrier is assembled into inner gear ring together with planetary gear, because planetary gear has certain tilt, it is easy to cause the phenomenon that tooth cannot be aligned with tooth groove, resulting in damage caused by tooth and tooth knock when tooth is inserted into tooth groove, and causing certain trouble to assembly work.In addition, planetary gear is rotatably connected to planet carrier by bearing, that is, planetary gear can be freely and flexibly rotated alone, which is also easy to cause tooth and tooth knock.
[0003] For smaller planetary gear and planet carrier, such as planetary gear and planet carrier that can be lifted by one hand, another hand can be used for assistance in assembly, and at most only one more operator is needed to assist assembly, so that the above-mentioned situation can be basically avoided.However, for large and medium-sized planetary gear train, the mass of its planetary gear and planet carrier is relatively large, and it cannot be lifted by manpower, and needs to be hoisted by using crane and other equipment.When hoisting, multiple people need to simultaneously right each planetary gear, so that the tooth of each planetary gear can be aligned with the tooth groove of inner gear ring to avoid the above-mentioned tooth knock situation.However, this operation is still dependent on manpower, and if slightly careless, the above-mentioned tooth knock situation can still occur.It can be seen that for large and medium-sized planetary gear train, this assembly needs multiple people to cooperate and operate, which has great difficulty, consumes more manpower, and the mass of each gear is large, the material is hard, and personnel need to always right each planetary gear during assembly, which has certain safety hazard. SUMMARY
[0004] The utility model provides a kind of tool for planetary gear assembly to overcome the deficiency in the prior art.The utility model realizes the above-mentioned purpose by the following technical solutions.
[0005] The planet wheel assembly tool comprises a base, the bottom surface and the top surface of the base are parallel to each other, a magnet is embedded in the bottom surface of the base, the base is provided with a groove with an opening facing the bottom surface, a guide shaft is slidably and rotatably connected to the base, the sliding direction of the guide shaft is perpendicular to the bottom surface of the base, the lower end of the guide shaft is provided with a radial flange, the flange is located in the groove of the base, a compression spring is sleeved outside the guide shaft, one end of the compression spring abuts against the flange, the other end of the compression spring abuts against the bottom surface of the groove, the upper end of the guide shaft is exposed to the top surface of the base and is fixedly connected with a middle adapter plate, the lower plate surface of the middle adapter plate is attached to the top surface of the base under the action of the compression spring, at least two guide rods whose center lines are perpendicular to the lower plate surface of the middle adapter plate are fixedly connected to the middle adapter plate, a fitting limiting block whose bottom surface is parallel to the lower plate surface of the middle adapter plate is slidably connected to the guide rods, the edge of the bottom surface of the fitting limiting block is provided with magnetism, a limiting pin is arranged at the bottom surface of the fitting limiting block, the outer edge of the middle adapter plate, the limiting pin and the outer edge of the fitting limiting block are sequentially away from the center of the guide shaft in the radial direction of the guide shaft, a tension spring is arranged between the fitting limiting block and the middle adapter plate or the guide shaft to make the middle adapter plate and the fitting limiting block tend to approach each other, a screw nut whose center is perpendicular to the bottom surface of the fitting limiting block is arranged on the fitting limiting block, a screw shaft is threadedly connected in the screw nut and penetrates through the fitting limiting block, and rotating the screw shaft can make the lower end of the screw shaft abut against the middle adapter plate or the guide shaft.
[0006] The magnet is embedded in the bottom surface of the base, the magnet can be regarded as a part of the base, so that the base can be attached to the end surface of the inner gear ring, and the bottom surface of the base can be attached to the end surface of the inner gear ring. The bottom surface of the fitting limiting block is provided with magnetism, which can be a magnet embedded in the bottom surface of the fitting limiting block, or the fitting limiting block can be directly made of a magnetic material, so that the bottom surface of the fitting limiting block can be attached to the end surface of the planet wheel. The lower plate surface of the middle adapter plate is attached to the top surface of the base under the action of the compression spring, which can prevent the relative rotation of the middle adapter plate and the base. The lower plate surface of the middle adapter plate is attached to the top surface and the bottom surface of the base, and the center line of the guide rod is perpendicular to the lower plate surface of the middle adapter plate, so the bottom surface of the fitting limiting block is always parallel to the bottom surface of the base. In order to make the stress of the fitting limiting block more balanced and the sliding more smooth, all the guide rods are uniformly arranged around the center of the guide shaft. The limiting pin is arranged between two adjacent teeth of the planet wheel to prevent the planet wheel from rotating or swinging freely, so the limiting pin is preferably a cylindrical pin with its center perpendicular to the bottom surface of the fitting limiting block. The elastic coefficient of the compression spring is preferably greater than that of the tension spring.
[0007] The inner ring usually has an end face perpendicular to its axis. When assembling, the inner ring is placed or fixed on the ground somewhere and the axis of the inner ring is kept vertical. The assembled planetary gear and carrier are lifted by a crane or other equipment while ensuring the axis of the planetary carrier remains vertical. The assembled planetary gear and carrier are moved to the top of the inner ring, and the lower end of the teeth of the planetary gear and the upper end of the teeth of the inner ring are as close as possible but not in contact. The planetary gear assembly tool of the present solution is placed on the end face of the inner ring and the bottom surface of the base is ensured to be in contact with the end face of the inner ring. Under the action of magnetic force, the base is adsorbed on the inner ring. Several planetary gear assembly tools are placed on the planetary carrier according to the number of planetary gears, and the position of one planetary gear assembly tool and one planetary gear is opposite.
[0008] The screw shaft is rotated so that the lower end of the screw shaft abuts against the middle adapter plate or guide shaft. Then the screw shaft is continuously rotated to force the abutting limit block to move upward under the guidance of the guide rod against the elastic force of the tension spring until the bottom surface of the abutting limit block is flush with the upper end of the teeth of the planetary gear. Then the base is moved along the end face of the inner ring so that the bottom surface of the abutting limit block is in contact with and adsorbed on the upper end of the teeth of the planetary gear. Each bottom surface of the abutting limit block is in contact with and adsorbed on the upper end of the teeth of the planetary gear by operating one by one. Then the screw shaft is rotated one by one so that the lower end of the screw shaft is away from the middle adapter plate and the guide shaft. In this way, on the one hand, the end faces of the teeth of the planetary gear and the inner ring are parallel, and on the other hand, the axes of the planetary carrier and the inner ring are parallel to each other. Then the middle adapter plate is moved upward and rotated under the guidance of the guide shaft against the action of the compression spring, thereby driving the abutting limit block to rotate so that the limit pin is clamped between two adjacent teeth of the planetary gear. After the middle adapter plate is loosened, the middle adapter plate is reattached to the base under the action of the compression spring to prevent the middle adapter plate and the base from rotating relative to each other. During the movement of the middle adapter plate up and down, the height position of the abutting limit block does not change. In this process, observation, wire lifting or laser testing methods can be used to ensure that the teeth of the planetary gear and the inner ring are aligned. If necessary, the base can be moved along the end face of the inner ring again to fine-tune to ensure that the teeth of the planetary gear and the inner ring are aligned. After the teeth of each planetary gear and the inner ring are aligned by operating one by one, the planetary gear and the planetary carrier can be slowly lowered, and the teeth of the planetary gear can be smoothly inserted into the inner ring to complete the assembly with the inner ring.
[0009] In the process of fitting and adsorbing the bottom surface of the fitting limiting block and the top surface of the gear teeth of the planetary gear, one or several fitting limiting blocks complete fitting and adsorption, while the other fitting limiting blocks do not complete fitting and adsorption, which will cause the force imbalance of the planetary gear and the planet carrier. If the elastic force of the tension spring is large, it may cause the problems of the downward movement of the fitting limiting block, the failure of fitting and adsorption, the tilting of the planetary gear and the planet carrier, etc. The lead screw shaft in the scheme can support the fitting limiting block and prevent the downward movement of the fitting limiting block. After all the fitting limiting blocks are well fitted and adsorbed, the lead screw shaft can be rotated to make the lower end of the lead screw shaft away from the middle adapter plate and the guide shaft, and even the lower end of the lead screw shaft can be retracted into the fitting limiting block, leaving enough space for the downward movement of the fitting limiting block. At this time, the force of the planetary gear and the planet carrier is balanced, and the above-mentioned problems caused by force imbalance will not occur. In addition, the guiding effect of the multiple guide rods is added, and the planetary gear and the planet carrier can move up and down smoothly within a certain range. The lead screw shaft can keep the fitting limiting block at any position within the stroke of the fitting limiting block, and the application range of the planetary gear assembly tool is wider.
[0010] The scheme is particularly suitable for large and medium-sized planetary gear trains. On the one hand, it can eliminate the influence of bearing clearance, so that the end surface of the gear teeth of the planetary gear and the end surface of the gear teeth of the inner tooth ring always remain parallel during assembly. On the other hand, it can limit the planetary gear to avoid free rotation, so that the gear teeth of the planetary gear and the gear grooves of the inner tooth ring are always aligned during assembly, effectively avoiding the knocking phenomenon of the gear teeth and the gear teeth, making the assembly more smooth and convenient, and even only one person can complete the assembly work, greatly reducing the assembly difficulty. Personnel do not need to always right the planetary gear during assembly, eliminating safety hazards.
[0011] As a further improved structure, a spherical type dynamic steel ball screw is threaded through the middle adapter plate. Rotating the spherical type dynamic steel ball screw can make the steel ball of the spherical type dynamic steel ball screw abut against the top surface of the base. Moving upward and rotating the middle adapter plate requires overcoming the elastic force of the compression spring. The upward movement distance of the middle adapter plate does not need to be too large, but because the middle adapter plate needs to be rotated, a relatively persistent force is needed, which is relatively laborious for manual operation. In this structure, as long as the spherical type dynamic steel ball screw is twisted to make the steel ball of the spherical type dynamic steel ball screw abut against the top surface of the base, and then the spherical type dynamic steel ball screw is twisted again, the middle adapter plate can be forced to move upward by a certain distance and be kept at this height position. At this time, the steel ball of the spherical type dynamic steel ball screw and the top surface of the base are in contact, and the friction between them is small, so the middle adapter plate can be easily rotated, greatly facilitating the adjustment operation.
[0012] As a further improved structure form, the lower plate surface of the middle adapter plate is provided with a first friction pad, the top surface of the base is provided with a second friction pad, and the first friction pad and the second friction pad are attached under the action of the compression spring. After the two friction pads are attached, the friction between the contact surfaces can be greatly improved, thereby more effectively preventing the middle adapter plate from rotating relative to the base, that is, further ensuring the limiting effect on the planetary gear.
[0013] As a further improved structure form, the upper end of the lead screw shaft is connected with a rotating handle. In this way, the lead screw shaft is more convenient to rotate, and the operation is more labor-saving and quick.
[0014] As a further improved structure form, a locking nut is threadedly connected to the lead screw shaft. The locking nut can abut against the abutting limiting block or the nut to lock the lead screw shaft, preventing accidental rotation of the lead screw shaft. When the lead screw shaft does not need to be locked, the locking nut can be rotated to an appropriate height position, so that the rotation of the lead screw shaft is not hindered.
[0015] As a further improved structure form, the base is provided with a mounting hole with an axis perpendicular to the bottom surface of the base, the mounting hole communicates the top surface of the base and the groove, a sliding sleeve is arranged in the mounting hole, the guide shaft is slidingly and rotatably connected to the base through the sliding sleeve, and the other end of the compression spring abuts against the groove bottom surface of the base or the sliding sleeve. This structure form can make the sliding of the guide shaft more smooth, and facilitate the up-down movement and rotation of the middle adapter plate.
[0016] Compared with the prior art, the utility model mainly has the following beneficial effects: it is particularly suitable for large and medium-sized planetary gear systems, can eliminate the influence of bearing play, keep the tooth end surface of the planetary gear and the tooth end surface of the inner tooth ring parallel during assembly, limit the planetary gear to avoid free rotation, keep the position of the teeth of the planetary gear and the tooth groove of the inner tooth ring aligned during assembly, effectively avoid the knocking phenomenon of the teeth, make the assembly more smooth and convenient, and even only one person can complete the assembly work, greatly reducing the assembly difficulty, eliminating the need for personnel to always right the planetary gear during assembly, and eliminating safety hazards. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a cross-sectional structure schematic view of the embodiment of the utility model.
[0018] Figure 2 It is a cross-sectional structure schematic view of the embodiment of the utility model in use. IMPLEMENTATION
[0019] The present invention is further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only and should not be construed as limiting this patent. To more concisely illustrate this embodiment, certain components known to those skilled in the art but not relevant to the main content of this invention may be omitted from the drawings or descriptions. Furthermore, for ease of presentation, certain components may be omitted, enlarged, or reduced in size in the drawings, but do not represent the dimensions or entire structure of the actual product.
[0020] Examples, such as Figure 1 As shown, a tool for assembling planetary gears has a base 11 as a bottom basic part. The overall shape of the base 11 is cylindrical. The bottom and top surfaces of the base 11 are both flat and parallel to each other. The bottom surface of the base 11 is perpendicular to the axis of the base 11. A circular ring-shaped magnet 12 is coaxially embedded in the bottom surface of the base 11. The bottom surface of the magnet 12 is flush with the bottom surface of the base 11. The base 11 is provided with a cylindrical groove 111 with an opening toward its bottom surface. The groove 111 and the base 11 are coaxial. A cylindrical mounting hole 112 is also coaxially provided in the base 11. The mounting hole 112 connects the top surface of the base 11 and the groove 111. A sleeve 13 is fixedly connected in the mounting hole 112. A guide shaft 21 is passed through the sleeve 13. The guide shaft 21 is connected to the base 11 through the sleeve 13 to achieve sliding and rotational connection. The lower end of the guide shaft 21 is equipped with a radial flange 211, which is located in the groove 111. A compression spring 22 is sheathed around the outer side of the guide shaft 21, with one end of the compression spring 22 resting against the flange 211 and the other end against the sliding sleeve 13. If a compression spring with a larger diameter is selected, the other end of the compression spring can also rest against the bottom surface of the groove. The upper end of the guide shaft 21 is exposed on the top surface of the base 11 and is coaxially fixedly connected to a disc-shaped central adapter plate 23.
[0021] As can be seen from the foregoing, the guide shaft 21 slides perpendicularly to the bottom surface of the base 11. The compression spring 22 ensures that the guide shaft 21 always slides toward the bottom surface of the base 11. Restricted by the central adapter plate 23 and the flange 211, the guide shaft 21 cannot escape from the sliding sleeve 13. A first, annular friction pad 24 is coaxially mounted on the lower surface of the central adapter plate 23, while a second friction pad 14 is coaxially mounted on the top surface of the base 11. The compression spring 22 ensures a tight fit between the first and second friction pads 24, effectively preventing relative rotation between the central adapter plate 23 and the base 11.
[0022] Two cylindrical guide rods 25 are fixedly connected to the middle adapter plate 23. The axes of the two guide rods 25 are perpendicular to the lower surface of the middle adapter plate 23 and are evenly arranged around the axis of the guide shaft 21. When using the planetary gear assembly tool of this embodiment, it is necessary to overcome the elastic force of the compression spring 22 to move the middle adapter plate 23 upward and rotate it. The upward movement distance of the middle adapter plate 23 does not need to be very large, but because the middle adapter plate 23 needs to be rotated, a relatively long force is required, and this action is relatively laborious if performed manually alone. To this end, this embodiment has a spherical dynamic steel ball screw 26 threadedly inserted through the middle adapter plate 23. The axis of the spherical dynamic steel ball screw 26 is perpendicular to the lower surface of the middle adapter plate 23. By rotating the spherical ball screw 26, the steel ball of the spherical ball screw 26 contacts the top surface of the base 11. Then, by rotating the spherical ball screw 26 again, the middle adapter plate 23 is forced to move upward a certain distance and the middle adapter plate 23 is maintained at this height. At this time, the steel ball of the spherical ball screw 26 contacts the top surface of the base 11, and the friction between them is very small. This makes it easy to rotate the middle adapter plate 23, greatly facilitating the adjustment operation.
[0023] A cylindrical stopper 31 is slidably connected to the two guide rods 25. The stopper 31 is coaxially arranged with the middle adapter plate 23. The bottom surface of the stopper 31 is perpendicular to the axis of the stopper 31 and parallel to the lower surface of the middle adapter plate 23. The stopper 31 in this embodiment is directly made of magnetic material. In other embodiments, the stopper can be made of non-magnetic material, and then a magnetic material part is embedded in the bottom surface of the stopper to make the bottom edge of the stopper magnetic.
[0024] A limit pin 32 is fixedly provided near the edge of the bottom surface of the fitting limit block 31. In this embodiment, the limit pin 32 is a cylindrical shaft pin, and the axis of the limit pin 32 is perpendicular to the bottom surface of the fitting limit block 31. In this embodiment, the guide rod 25, the outer cylindrical surface of the middle adapter plate 23, the limit pin 32, and the outer cylindrical surface of the fitting limit block 31 are successively away from the axis of the guide shaft 21 in the radial direction of the guide shaft 21. The outer cylindrical surface of the base 11 is located within the projection range of the outer cylindrical surface of the middle adapter plate 23. In other words, the diameter of the base 11 is smaller than the diameter of the middle adapter plate 23, and the diameter of the middle adapter plate 23 is smaller than the diameter of the fitting limit block 31. The position of the limit pin 32 is located outside the cylindrical surface where the outer cylindrical surface of the middle adapter plate 23 is located, and is located inside the cylindrical surface where the outer cylindrical surface of the fitting limit block 31 is located.
[0025] Two extension springs 33 are arranged between the fitting limiting block 31 and the middle adapter plate 23, one end of each of the extension springs 33 is connected to the fitting limiting block 31, and the other end of each of the extension springs 33 is connected to the middle adapter plate 23, the two extension springs 33 are evenly arranged around the axis of the guide shaft 21, and the extension springs 33 always tend to make the middle adapter plate 23 and the fitting limiting block 31 close to each other. In the moving range of the fitting limiting block 31 and the middle adapter plate 23, the elastic force provided by the compression spring 22 is always greater than the elastic force provided by the two extension springs 33. A nut 34 is coaxially arranged on the fitting limiting block 31, a screw shaft 35 is threadedly matched in the nut 34 and penetrates through the fitting limiting block 31, and rotating the screw shaft 35 can make the lower end of the screw shaft 35 abut against the guide shaft 21. In order to make the rotation of the screw shaft 35 more convenient and labor-saving, a rotating handle 36 is fixedly connected to the upper end of the screw shaft 35 in the embodiment. In order to prevent the screw shaft 35 from being accidentally rotated, a locking nut 37 is threadedly matched on the screw shaft 35 in the embodiment, the locking nut 37 is arranged between the rotating handle 36 and the nut 34, and the locking nut 37 can abut against the nut 34 to lock the screw shaft 35. When the screw shaft 35 does not need to be locked, the locking nut 37 can be rotated to move away from the nut 34, so that the rotation of the screw shaft 35 is not hindered.
[0026] The guide shaft 21 and the base 11 are slidably and rotatably connected through the sliding sleeve 13 in the embodiment, and the sliding sleeve 13 can be a self-lubricating sliding sleeve, so that the guide shaft 21 moves up and down and rotates more smoothly. As can be known from the structure of the embodiment, the lower plate surface of the middle adapter plate 23 and the bottom surface of the fitting limiting block 31 are always parallel to the bottom surface of the base 11, whether in a static state or in a moving process. The guide rods 25 are evenly arranged in the embodiment, so that the fitting limiting block 31 bears more balanced force and slides more smoothly.
[0027] As shown in FIG. 6, Figure 2 As shown in FIG. 6,
[0028] The planetary gear assembly tool of the present embodiment is placed on the upper end surface of the inner ring gear 63, and the bottom surface of the base 11 is attached to the upper end surface of the inner ring gear 63. Under the action of the magnet 12, the base 11 can be adsorbed on the inner ring gear 63. The planetary carrier 62 of the present embodiment is provided with three planetary gears 61, so three sets of planetary gear assembly tools are placed on the inner ring gear 63, and the three sets of planetary gear assembly tools are respectively opposite to the positions of the three planetary gears 61.
[0029] First, any one set of planetary gear assembly tool is operated. The lead screw shaft 35 is rotated to make the lower end of the lead screw shaft 35 abut against the guide shaft 21, and then the lead screw shaft 35 is continuously rotated to force the abutting limiting block 31 to move upward along the guide rod 25 against the elastic force of the tension spring 33 until the bottom surface of the abutting limiting block 31 is flush with the upper end surface of the tooth of the planetary gear 61. Then the base 11 is moved along the end surface of the inner ring gear 63 to make the bottom surface of the abutting limiting block 31 abut against and adsorb the upper end surface of the tooth of the planetary gear 61, and then the locking nut 37 is rotated to lock the lead screw shaft 35. In this way, the other two sets of planetary gear assembly tools are operated one by one, so that the bottom surface of each abutting limiting block 31 abuts against and adsorbs the upper end surface of the tooth of the planetary gear 61.
[0030] After the abutting limiting blocks 31 of the three sets of planetary gear assembly tools are adsorbed against the planetary gears 61, the locking nuts 37 are rotated one by one to move away from the lead screw nut 34 to unlock the lead screw shaft 35. Then the lead screw shaft 35 is rotated again to move the lower end of the lead screw shaft 35 away from the guide shaft 21. At this time, because the planetary gears 61 and the planetary carrier 62 are in a balanced force state, the abutting limiting block 31 will not move downward, the abutting adsorption will not fail, and the planetary gears 61 and the planetary carrier 62 will not tilt, etc. On the one hand, it can ensure that the tooth end surface of the planetary gear 61 is parallel to the tooth end surface of the inner ring gear 63, and on the other hand, it can further ensure that the axis of the planetary carrier 62 is parallel to the axis of the inner ring gear 63. In addition, the six guide rods 25 provide guiding effect, so that the planetary gears 61 and the planetary carrier 62 can move smoothly and linearly within a certain range.
[0031] Then the tooling for any one of the planetary gears is assembled and operated. Turn the spherical dynamic steel ball screw 26 with a wrench, and force the middle adapter plate 23 to move upwards by a certain distance against the elastic force of the compression spring 22. The distance does not need to be too large, as long as it can ensure that the middle adapter plate 23 can rotate relative to the base 11. Then rotate the middle adapter plate 23, and then drive the abutting limiting block 31 to rotate, so that the limiting pin 32 is clamped between the adjacent two teeth of the planetary gear 61. Then reverse the spherical dynamic steel ball screw 26, and the middle adapter plate 23 moves downward under the action of the compression spring 22, and the first friction pad 24 and the second friction pad 14 are re-abutted to prevent the middle adapter plate 23 and the base 11 from rotating relative to each other. During the up-and-down movement of the middle adapter plate 23, the height position of the abutting limiting block 31 does not change, that is, the bottom surface of the abutting limiting block 31 and the upper end surface of the teeth of the planetary gear 61 always remain in an abutting and adsorbing state. During the rotation of the middle adapter plate 23, observation, wire hanging or laser testing methods can be used to ensure that the teeth of the planetary gear 61 and the tooth groove position of the inner tooth ring 63 are aligned, and if necessary, the base 11 can be moved along the end surface of the inner tooth ring 63 again to fine-tune to ensure that the teeth of the planetary gear 61 and the tooth groove position of the inner tooth ring 63 are aligned. After each tooth of the planetary gear 61 and the tooth groove position of the inner tooth ring 63 are aligned one by one, the planetary gear 61 and the planetary carrier 62 can be slowly moved downward, and the teeth of the planetary gear 61 can be smoothly inserted into the tooth groove of the inner tooth ring 63 to complete the assembly with the inner tooth ring 63.
[0032] The above operation steps are only commonly used steps in actual production, and the steps can be rearranged as needed under the condition of clearly understanding the use principle. After the two friction pads in the embodiment are abutted, the friction between the contact surfaces can be greatly improved, thereby more effectively preventing the middle adapter plate 23 from rotating relative to the base 11, that is, further ensuring the limiting effect on the planetary gear 61. The limiting pin 32 in the embodiment is placed between the two adjacent teeth of the planetary gear 61 to prevent the planetary gear 61 from freely rotating or swinging. The lead screw shaft 35 in the embodiment can support the abutting limiting block 31 and prevent the abutting limiting block 31 from moving downward. After all the abutting limiting blocks 31 are well abutted and adsorbed, the lead screw shaft 35 can be rotated to move the lower end of the lead screw shaft 35 away from the middle adapter plate 23 and the guide shaft 21, or even make the lower end of the lead screw shaft 35 retreat into the abutting limiting block 31, leaving enough space for the abutting limiting block 31 to move downward. The lead screw shaft 35 can keep the abutting limiting block 31 at any position within the stroke of the abutting limiting block 31, so that the planetary gear assembly tooling has a wider range of application.
[0033] The tool for assembling the planetary gear of the embodiment is particularly suitable for large and medium-sized planetary gear systems, and can eliminate the influence of bearing play, keep the tooth end surface of the planetary gear 61 and the tooth end surface of the inner gear ring 63 parallel during assembly, limit the planetary gear 61 to avoid free rotation of the planetary gear 61, keep the position of the teeth of the planetary gear 61 and the tooth grooves of the inner gear ring 63 aligned during assembly, effectively avoid the knocking phenomenon of the teeth, make the assembly more smooth and convenient, and even only one person can complete the assembly work, greatly reducing the assembly difficulty, eliminating the need for personnel to always right the planetary gear 61 during assembly, and eliminating the safety hazard.
[0034] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial modification made to the present application by utilizing the design concept of the present application falls within the protection scope of the present application.
Claims
1. A tool for assembling planetary gears, characterized in that: The cam is provided with a plurality of guide wheels, and the guide wheels are connected to the cam for rotation, and the guide wheels are connected to the cam for rotation. The guide wheels are connected to the cam for rotation, and the guide wheels are connected to the cam for rotation. The guide rods on the lower plate surface are slidably connected to a fitting limit block whose bottom surface is parallel to the lower plate surface of the middle adapter plate. The bottom edge of the fitting limit block is magnetic, and a limit pin is provided at the bottom surface of the fitting limit block. The outer edge of the middle adapter plate, the limit pin and the outer edge of the fitting limit block are successively away from the axis center of the guide shaft in the radial direction of the guide shaft. A tension spring is provided between the fitting limit block and the middle adapter plate or the guide shaft to make the middle adapter plate and the fitting limit block tend to be close. A nut with an axis center perpendicular to the bottom surface of the fitting limit block is installed on the fitting limit block. The thread in the nut is matched with a screw shaft and the screw shaft passes through the fitting limit block. Rotating the screw shaft can make the lower end of the screw shaft abut against the middle adapter plate or the guide shaft.
2. The planetary gear assembly tool according to claim 1, characterized in that: The middle adapter plate is threaded with a spherical dynamic steel ball screw. When the spherical dynamic steel ball screw is rotated, the steel ball of the spherical dynamic steel ball screw can be abutted against the top surface of the base.
3. The planetary gear assembly tool according to claim 1, characterized in that: A first friction pad is provided on the lower surface of the middle adapter plate, and a second friction pad is provided on the top surface of the base. The first friction pad and the second friction pad are fitted together under the action of the compression spring.
4. The planetary gear assembly tool according to claim 1, characterized in that: The upper end of the screw shaft is connected with a rotating handle.
5. The planetary gear assembly tool according to claim 1, characterized in that: The thread on the screw shaft is matched with a locking nut.
6. The planetary gear assembly tool according to claim 1, characterized in that: The base is provided with a mounting hole whose axis is perpendicular to the bottom surface of the base. The mounting hole connects the top surface and the groove of the base. A sliding sleeve is installed in the mounting hole. The guide shaft is slidably and rotatably connected to the base through the sliding sleeve. The other end of the compression spring is against the bottom surface of the groove of the base or against the sliding sleeve.