Inner gear ring floating adjusting device of planet row speed reducer
By introducing axial and radial elastic positioning modules into the planetary gear reducer, the high cost and abnormal noise problems caused by the rigid connection between the internal gear ring and the housing are solved, and the adaptive floating of the internal gear ring is realized, avoiding uneven load and breakage of gear meshing.
Patent Information
- Application Number
- CN202511305422.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2025-11-18
AI Technical Summary
The rigid connection between the internal gear ring and the housing in existing planetary gear reducers leads to high manufacturing costs, knocking noises, and gear tooth breakage due to uneven gear meshing.
By employing axial and radial elastic positioning modules, the internal gear ring can undergo elastic deformation in both the axial and radial directions. The displacement of the internal gear ring is limited by the axial elastic positioning module and the radial elastic positioning block, thus avoiding rigid impact and uneven meshing load.
It reduces the precision requirements for parts machining, avoids knocking noises and gear tooth breakage, and improves the load distribution between the internal gear ring and the planetary carrier assembly.
Smart Images
Figure CN120969423A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of speed reducer, in particular to a floating adjustment device of an inner gear ring of a planetary gear reducer. BACKGROUND
[0002] A common floating adjustment scheme of an inner gear ring of a planetary gear reducer in the market currently comprises an inner gear ring, a housing, an inner gear ring positioning collar, a planetary gear and a planetary carrier assembly.
[0003] The scheme takes the planetary gear as a power input, and performs power output from the planetary carrier assembly after speed reduction and torque increase through the gear ring, wherein the inner gear ring is hard connected with the housing in the radial direction through a spline, and is limited in the axial direction through the inner gear ring positioning collar, and the main connection principle is that the spline of the inner gear ring is matched with the tooth groove gap of the housing, the housing is in contact with the inner gear ring, the inner gear ring is in contact with the inner gear ring positioning collar, the inner gear ring positioning collar is in contact with the housing to form a gap fit for axial positioning, the inner gear ring positioning collar is matched with the housing in the radial direction to ensure the radial positioning of the axial positioning collar.
[0004] Therefore, the main defects of the prior art include: 1. The inner gear ring is located between the housing and the planetary carrier assembly, and a gap needs to be reserved between the inner gear ring and the housing to compensate for the installation error of the planetary gear, and when the torque is converted in the forward and reverse directions, the torque in the reverse direction will cause the gap between the inner gear ring, the inner gear ring and the housing, and the housing to change, and since the gap is too large, knocking noise problems will occur, and if the gap is too small, gear meshing uneven load will cause tooth fracture problems, and the gap needs to be explored through a large number of tests during product development, which affects the product development progress.
[0005] 2. The connection gap between the inner gear ring and the housing is large, and the gap range needs to be accurately controlled during actual use, which will lead to an increase in the machining precision of the planetary carrier assembly, the inner gear ring and the housing, resulting in high manufacturing cost of the parts. SUMMARY
[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present application is to provide a floating adjustment device of an inner gear ring of a planetary gear reducer to solve the problems of high manufacturing cost of parts, knocking noise, gear meshing uneven load leading to tooth fracture and the like caused by hard connection of the inner gear ring and the housing in the prior art.
[0007] In order to solve the above-mentioned technical problems, the present application adopts the following technical scheme: The application discloses a floating adjusting device for an inner ring gear of a planetary gear reducer, which comprises a housing, a circular mounting groove is arranged on one side end face of the housing, and the inner ring gear is coaxially and movably arranged in the mounting groove, so that the inner ring gear can move in the axial direction and the radial direction and rotate around the axis by a preset displacement; an axial elastic positioning module is arranged between the inner ring gear and the bottom wall of the mounting groove, so as to limit the axial displacement of the inner ring gear within the elastic range of the axial elastic positioning module; and a radial elastic positioning block is arranged between the inner ring gear and the circumferential side wall of the mounting groove, so as to limit the radial displacement and the circumferential rotation displacement of the inner ring gear within the elastic range of the radial elastic positioning block.
[0008] As an optimization, a plurality of sliding grooves extending in the axial direction of the mounting groove are distributed around the circumferential side wall of the mounting groove, one end of the sliding groove penetrates the end face of the housing to form an open end, and correspondingly, a plurality of external teeth matched with the sliding grooves are distributed around the outer side wall of the inner ring gear; when the inner ring gear is arranged in the mounting groove, the external teeth are slid into the sliding grooves through the open ends of the sliding grooves and are matched with the gap between the groove walls of the sliding grooves; and the radial elastic positioning block is arranged in the gap between the groove walls of the sliding grooves and the external teeth of the inner ring gear. A limiting groove extending around the circumferential side wall of the mounting groove is further arranged on the circumferential side wall of the mounting groove, the limiting groove penetrates each sliding groove, and a positioning clasp is fixedly arranged in the limiting groove; the inner side end face of the positioning clasp can be matched with the outer side end face of the external teeth of the inner ring gear, so as to limit the axial displacement of the inner ring gear.
[0009] As an optimization, the axial elastic positioning module comprises an inner side plate and an outer side plate, a spring is arranged between the inner side plate and the outer side plate, under the action of the spring, the inner side plate is matched with the bottom wall of the mounting groove, and the outer side plate is matched with the inner side end face of the inner ring gear.
[0010] As an optimization, the section of the inner side plate is C-shaped, and the opening side of the inner side plate faces the inner ring gear; the section of the outer side plate is C-shaped and opposite to the inner side plate, so that the two side flange plates of the outer side plate are matched with and slidably connected with the opposite sides of the two side flange plates of the inner side plate.
[0011] As optimization, the radial elastic positioning block comprises a first elastic plate and a second elastic plate arranged in parallel, one end of the first elastic plate and the second elastic plate on the same side is connected by a top plate, the other end is respectively bent in a direction away from each other, then is bent in a direction parallel to the first elastic plate and the second elastic plate and extended to form a third elastic plate parallel to the first elastic plate and a fourth elastic plate parallel to the second elastic plate, the tail end of the third elastic plate and the fourth elastic plate is bent in a direction close to each other and extended to form a fifth elastic plate parallel to the top plate and a sixth elastic plate, the tail end of the fifth elastic plate and the sixth elastic plate is respectively bent in a direction close to the top plate and extended to form a seventh elastic plate and an eighth elastic plate perpendicular to the top plate, the tail end of the seventh elastic plate and the eighth elastic plate is bent in a direction away from each other and extended to form a ninth elastic plate and a tenth elastic plate parallel to the top plate; Wherein, there is a gap between the first elastic plate and the third elastic plate, between the second elastic plate and the fourth elastic plate, between the seventh elastic plate and the eighth elastic plate, and between the ninth elastic plate and the tenth elastic plate and the top plate. The outer gear sleeve of the inner gear ring is arranged in a U-shaped groove formed by the first elastic plate, the top plate and the second elastic plate, and the second elastic plate and the fourth elastic plate are respectively attached to the opposite two side walls of the sliding groove, and the fifth elastic plate and the sixth elastic plate are respectively attached to the groove bottom of the sliding groove.
[0012] Compared with the prior art, the present application has the following beneficial effects: The present application, Through structural optimization, the axial elastic positioning module and the radial elastic positioning block are arranged, when the inner gear ring is subjected to sudden force change and reverse, the radial elastic positioning block and the axial elastic positioning module will elastically deform according to the direction of force, preventing the inner gear ring and the surrounding parts from producing rigid impact and abnormal noise, at the same time, since the stiffness of the radial elastic positioning block and the axial elastic positioning module is adjustable, the inner gear ring can always be in an adaptive state, the machining precision of the planetary carrier assembly, the inner gear ring and the shell can be reduced, and the inner gear ring and the planetary carrier assembly can still maintain a uniform load state without abnormal tooth fracture problem. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a front view structural schematic diagram of the present application; Figure 2 It is a sectional view structural schematic diagram of the present application; Figure 3 It is a local structural schematic diagram of the present application; Figure 4 It is an axial elastic positioning module structural schematic diagram of the present application; Figure 5 It is a radial elastic positioning block assembly schematic diagram of the present application; Figure 6Fig. 1 is a schematic view of the radial elastic positioning block structure of the present application; In the figure, 1 is a shell, 2 is a mounting groove, 201 is a sliding groove, 202 is a limiting groove, 203 is a positioning collar, 3 is an inner ring gear, 301 is an outer tooth, 4 is an axial elastic positioning module, 401 is an inner side plate, 402 is an outer side plate, 403 is a spring, 5 is a radial elastic positioning block, 501 is a first elastic plate, 502 is a second elastic plate, 503 is a top plate, 504 is a third elastic plate, 505 is a fourth elastic plate, 506 is a fifth elastic plate, 507 is a sixth elastic plate, 508 is a seventh elastic plate, 509 is an eighth elastic plate, and 510 is a ninth elastic plate. DETAILED DESCRIPTION
[0014] The present application will be further described in detail below with reference to the accompanying drawings.
[0015] In the specific implementation, refer to Figures 1-6 , In the embodiment, the inner ring gear 3 floating adjustment device of the planetary gear reducer comprises a shell 1, a circular mounting groove 2 is arranged on one side end surface of the shell 1, and the inner ring gear 3 is coaxially and movably arranged in the mounting groove 2, so that the inner ring gear 3 can move in the axial and radial directions and rotate around the axis by a preset displacement; an axial elastic positioning module 4 is arranged between the inner ring gear 3 and the bottom wall of the mounting groove 2, which is used to limit the axial displacement of the inner ring gear 3 within the elastic range of the axial elastic positioning module 4; and a radial elastic positioning block 5 is arranged between the inner ring gear 3 and the circumferential side wall of the mounting groove 2, which is used to limit the radial displacement and circumferential rotation displacement of the inner ring gear 3 within the elastic range of the radial elastic positioning block 5.
[0016] Through the structural optimization of the axial elastic positioning module 4 and the radial elastic positioning block 5, when the inner ring gear 3 is subjected to sudden force change and reverse, the radial elastic positioning block 5 and the axial elastic positioning module 4 will elastically deform according to the force direction, preventing the inner ring gear 3 from producing abnormal noise due to rigid impact with the surrounding parts. At the same time, since the stiffness of the radial elastic positioning block 5 and the axial elastic positioning module 4 is adjustable, the inner ring gear 3 can always be in an adaptive state, which can reduce the machining precision of the planetary carrier assembly, the inner ring gear 3 and the shell 1, and the inner ring gear 3 and the planetary carrier assembly can still maintain the uniform load state without the problem of abnormal tooth fracture.
[0017] Specifically, a plurality of sliding grooves 201 extending along the axial direction of the mounting groove 2 are distributed around the circumferential side wall of the mounting groove 2, one end of the sliding groove 201 penetrates the end surface of the shell 1 to form an open end, and a plurality of outer teeth 301 corresponding to the sliding grooves 201 are distributed around the outer side wall of the inner ring gear 3. When the inner ring gear 3 is installed in the mounting groove 2, the outer teeth 301 are slid into the sliding grooves 201 from the open ends of the sliding grooves 201 and are gap-fitted between the groove walls of the sliding grooves 201, and the radial elastic positioning block 5 is installed in the gap between the groove walls of the sliding grooves 201 and the outer teeth 301 of the inner ring gear 3. A limiting groove 202 is also formed on the circumferential side wall of the mounting groove 2, which penetrates each sliding groove 201, and a positioning collar 203 is fixedly installed in the limiting groove 202, the inner side end face of the positioning collar 203 can be in close contact with the outer side end face of the outer teeth 301 of the inner tooth ring 3, for limiting the axial displacement of the inner tooth ring 3.
[0018] The axial elastic positioning module includes an inner side plate 401 and an outer side plate 402, and a spring 403 is arranged between the inner side plate 401 and the outer side plate 402, under the action of the spring 403, the inner side plate 401 is in close contact with the bottom wall of the mounting groove 2, and the outer side plate 402 is in close contact with the inner side end face of the inner tooth ring 3. The section of the inner side plate 401 is C-shaped, and the opening side faces the inner tooth ring 3, and the section of the outer side plate 402 is C-shaped opposite to the inner side plate 401, so that the two side flange plates of the outer side plate 402 are in close contact with and slidingly connected to the opposite sides of the two side flange plates of the inner side plate 401.
[0019] The radial elastic positioning block 5 includes first and second elastic plates 501 and 502 arranged in parallel, one end of the first and second elastic plates 501 and 502 on the same side is connected by a top plate 503, the other end is respectively bent in opposite directions, and then bent and extended in a direction parallel to the first and second elastic plates 501 and 502 to form a third elastic plate 504 parallel to the first elastic plate 501 and a fourth elastic plate 505 parallel to the second elastic plate 502, the distal ends of the third and fourth elastic plates 504 and 505 are bent and extended in a direction close to each other to form a fifth elastic plate 506 parallel to the top plate 503 and a sixth elastic plate 507, the distal ends of the fifth and sixth elastic plates 506 and 507 are bent and extended in a direction close to the top plate 503 to form a seventh elastic plate 508 perpendicular to the top plate 503 and an eighth elastic plate 509, and the distal ends of the seventh and eighth elastic plates 508 and 509 are bent and extended in opposite directions to form a ninth elastic plate 510 parallel to the top plate 503 and a tenth elastic plate 511. The first elastic plate 501 and the third elastic plate 504, the second elastic plate 502 and the fourth elastic plate 505, and the seventh elastic plate 508 and the eighth elastic plate 509 all have gaps therebetween, and the ninth elastic plate 510 and the tenth elastic plate 511 have gaps with the top plate 503. The outer teeth 301 of the inner tooth ring 3 are sleeved in a U-shaped groove formed by the first elastic plate 501, the top plate 503 and the second elastic plate 502, and the second elastic plate 502 and the fourth elastic plate 505 are in close contact with the opposite two side walls of the sliding groove 201, and the fifth elastic plate 506 and the sixth elastic plate 507 are in close contact with the groove bottom of the sliding groove 201.
[0020] In the implementation, the adjusting device of the application is characterized in that a radial elastic positioning block 5 is added between the inner ring gear 3 and the mounting groove 2 of the shell 1 in the radial direction, and an axial elastic positioning module 4 is added between the inner ring gear 3 and the shell 1 in the axial direction. The gap between the first elastic plate 501 and the second elastic plate 502 of the radial elastic positioning block 5 is smaller than the thickness of the outer tooth 301 of the inner ring gear 3. After the inner ring gear 3 is installed in the radial elastic positioning block 5, the inner ring gear 3 is fixed in the U-shaped groove formed between the first elastic plate 501, the second elastic plate 502 and the top plate 503 of the radial elastic positioning block 5. Since there is a gap between the first elastic plate 501 and the third elastic plate 504, between the second elastic plate 502 and the fourth elastic plate 505, and between the seventh elastic plate and the eighth elastic plate 509, an elastic deformation space is formed. According to the torque load of the inner ring gear 3, the radial elastic positioning block 5 will synchronously deform in the circumferential direction. After the torque of the inner ring gear 3 rebounds, the radial elastic positioning block 5 returns to the original state.
[0021] The radial elastic positioning block 5 is installed in the sliding groove 201, and the distance between the opposite two side walls of the sliding groove 201 is smaller than the distance between the third elastic plate 504 and the fourth elastic plate 505 of the radial elastic positioning block 5. At this time, the radial elastic positioning block 5 is in an elastic compression state, and the distance between the first elastic plate 501 and the third elastic plate 504 and the distance between the second elastic plate 502 and the fourth elastic plate 505 are reduced, so that the radial elastic positioning block 5 is better assembled in the sliding groove 201.
[0022] When the inner ring gear 3 has a radial force, it will have a floating demand. The tooth top position of the outer tooth 301 of the inner ring gear 3 will contact the top plate 503 of the radial elastic positioning block 5, so that the radial elastic positioning block 5 deforms elastically. At this time, the distance between the ninth elastic plate 510 and the fifth elastic plate 506, the distance between the tenth elastic plate 511 and the sixth elastic plate 507, and the distance between the ninth elastic plate 510 and the tenth elastic plate 511 and the top plate 503 are reduced. At the same time, since the fifth elastic plate 506 and the sixth elastic plate 507 are in contact with the groove bottom of the sliding groove 201, the radial elastic positioning block 5 will synchronously deform in the circumferential direction. The deformation of the radial elastic positioning block 5 in the radial and circumferential directions ensures the radial and rotational positioning of the inner ring gear 3. Since the inner ring gear 3 floats by elastic deformation during operation, knocking noise problems will not occur.
[0023] The inner gear ring 3 and the mounting groove 2 of the shell 1 are axially increased with the axial elastic positioning module 4, which is composed of the outer side plate 402, the spring 403 and the inner side plate 401. The axial limiting and fixing between the inner gear ring 3 and the shell 1 is realized through the inner gear ring 3 positioning ring 203. In the assembled state, the distance between the limiting groove 202 on the shell 1 and the outer side plate 402 of the axial elastic positioning module 4 is less than the sum of the distance from the inner side plate 401 of the axial elastic positioning module 4 to the outer side plate 402 and the thickness of the inner gear ring 3. At this time, the axial elastic positioning module 4 is in a compressed state, but it is not compressed to the limit position. If the axial stiffness of the axial elastic positioning module 4 is too small, the number of springs 403 can be increased to solve the problem. At this time, the assembly stability of the inner gear ring 3 is better, and there is no assembly gap in the axial direction. When the inner gear ring 3 needs to be axially floated in the direction close to the shell 1 under the axial force, the inner side end surface of the inner gear ring 3 contacts the outer side plate 402 of the axial elastic positioning module 4. Under the axial force, the spring 403 is elastically deformed, and the force of the inner gear ring 3 is transmitted to the inner side plate 401. The inner side plate 401 transmits the force to the shell 1. When the axial force of the inner gear ring 3 is removed, the axial elastic positioning module 4 returns to the initial assembly state. Since the inner gear ring 3 is always in the assembly pre-tightening state, and has a certain axial elastic movement range, the problems of uneven load and knocking noise of gear engagement will not occur.
[0024] Although the embodiments of the present application have been shown and described, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and the scope of the present application, the scope of the present application is defined by the appended claims and their equivalents, therefore the embodiments of the present application are only for the illustrative examples of the present application, the embodiments of the present application do not constitute a limitation on the present application in any way.
Claims
1. A floating adjustment device for the inner ring of a planetary gear reducer, comprising a housing, a circular mounting groove is provided on one side end face of the housing, and an inner ring is coaxially and movably mounted in the mounting groove, so that the inner ring can move along its axial and radial directions and rotate around its axis by a preset displacement; characterized in that, An axial elastic positioning module is arranged between the inner gear ring and the bottom wall of the mounting groove, for limiting the axial displacement of the inner gear ring within the elastic range of the axial elastic positioning module.
2. A floating adjustment device for the inner ring of a planetary gear reducer according to claim 1, characterized in that A plurality of sliding grooves extending along the axial direction of the mounting groove are distributed around the circumferential side wall of the mounting groove, one end of the sliding groove penetrates the end face of the housing to form an open end, and correspondingly, a plurality of external teeth are distributed around the outer side wall of the inner gear ring, which are matched with the sliding grooves, when the inner gear ring is installed in the mounting groove, the external teeth are slid into the sliding groove through the open end of the sliding groove and are matched with the groove wall of the sliding groove in a gap, and the radial elastic positioning block is installed in the gap between the groove wall of the sliding groove and the external teeth of the inner gear ring. A limiting groove is also provided on the circumferential side wall of the mounting groove, the limiting groove penetrates each sliding groove, and a positioning ring is fixedly installed in the limiting groove, the inner side end face of the positioning ring can be in close contact with the outer side end face of the external teeth of the inner gear ring, for limiting the axial displacement of the inner gear ring.
3. A floating adjustment device for the inner ring of a planetary gear reducer according to claim 2, characterized in that The axial elastic positioning module includes an inner side plate and an outer side plate, a spring is arranged between the inner side plate and the outer side plate, under the action of the spring, the inner side plate is in close contact with the bottom wall of the mounting groove, and the outer side plate is in close contact with the inner side end face of the inner gear ring.
4. A floating adjustment device for the inner ring of a planetary gear reducer according to claim 3, characterized in that The cross section of the inner side plate is C-shaped, the open side of the inner side plate faces the inner gear ring, and the cross section of the outer side plate is C-shaped opposite to the inner side plate, so that the two side flange plates of the outer side plate are in close contact with and slidingly connected to the opposite sides of the two side flange plates of the inner side plate.
5. A floating adjustment device for the inner ring of a planetary gear reducer according to claim 2, characterized in that The radial elastic positioning block includes first and second elastic plates arranged in parallel, one end of the first and second elastic plates on the same side is connected by a top plate, the other end is bent in a direction away from each other, and then bent and extended in a direction parallel to the first and second elastic plates to form a third elastic plate parallel to the first elastic plate and a fourth elastic plate parallel to the second elastic plate, the ends of the third and fourth elastic plates are bent and extended in a direction close to each other to form a fifth elastic plate parallel to the top plate and a sixth elastic plate, the ends of the fifth and sixth elastic plates are bent and extended in a direction close to the top plate to form a seventh elastic plate and an eighth elastic plate perpendicular to the top plate, and the ends of the seventh and eighth elastic plates are bent and extended in a direction away from each other to form a ninth elastic plate and a tenth elastic plate parallel to the top plate. The first elastic plate and the third elastic plate, the second elastic plate and the fourth elastic plate, and the seventh elastic plate and the eighth elastic plate have gaps therebetween, and the ninth elastic plate and the tenth elastic plate have gaps with the top plate. The external teeth of the inner gear ring are sleeved in a U-shaped groove formed by the first elastic plate, the top plate and the second elastic plate, and the second elastic plate and the fourth elastic plate are in close contact with the opposite two side walls of the sliding groove, and the fifth elastic plate and the sixth elastic plate are in close contact with the groove bottom of the sliding groove.