Self-adaptive axial positioning device for coupler
By incorporating elastic elements and bolt connections within the coupling, the axial force of the half-coupling is actively adjusted, thus resolving the axial movement problem of the drum-tooth type two-half coupling and achieving axial positioning stability and normal equipment operation.
Patent Information
- Application Number
- CN202520198223.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-08
AI Technical Summary
The existing drum-shaped gear two-half coupling has shortcomings in axial positioning, which leads to axial movement, tooth wear, equipment downtime, and increased maintenance costs.
An elastic element is installed inside the coupling. A pre-tightening force is applied between the right half coupling sleeve and the left half coupling sleeve, which are connected by multiple bolts, to actively adjust the axial force of the external gear sleeve of the half coupling and prevent axial movement.
It effectively solves the problem of axial movement, ensures effective meshing of the internal and external teeth of the gear coupling at all times, reduces wear, improves equipment reliability and production efficiency, and reduces maintenance costs.
Smart Images
Figure CN223594777U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of couplings, and more particularly to a self-adaptive axial positioning device for a coupling. BACKGROUND
[0002] In order to save energy and reduce emissions, many oil-electric drive devices are currently being modified in the industrial field for rail locomotives and engineering machinery, i.e., a motor is used to drive a gear box or a hydraulic motor to replace the original diesel engine to drive the working machine. Due to the characteristics of the existing equipment, the original equipment is mostly spline output, and there is no shaft shoulder positioning and no shaft end locking hole, which leads to the problem that the traditional coupling cannot solve the axial positioning during the modification process, thereby easily causing damage to the coupling and unsuccessful modification, and thus new requirements are put forward for the coupling of the motor output power transmission to the equipment.
[0003] The drum gear coupling is used to replace the original elastic coupling, and the drum gear coupling is fully applied due to its compact radial size, large torque transmission capacity, and large radial and angular deviation compensation capacity.
[0004] In order to realize the angular and radial deviation compensation, the tooth shape of the half-coupling sleeve outer tooth is made into a circular arc in the axial section, so as to compensate the axial and radial deviation of the half-coupling sleeve caused by manufacturing or installation errors. After assembly, a certain gap value is required between the two end faces of the two outer tooth sleeves as a compensation space.
[0005] Due to space limitations or shaft diameter strength requirements and the fact that the equipment itself does not have a shaft end locking end cover or the end cover is loose and causes locking failure, the half-coupling outer tooth sleeve also moves axially due to installation errors of the main and driven shafts, vibration during high-speed long-term operation of the equipment, impact load, and other reasons. In addition, due to the characteristics of the coupling itself, the two inner tooth sleeves cannot be positioned with the outer tooth sleeve, and the inner tooth sleeve moves to one side with the outer tooth sleeve, thereby causing misalignment of the inner tooth on the other side, and the inner tooth and the outer tooth cannot be effectively meshed, resulting in tooth damage and tooth wear, ultimately leading to the scrap of the tooth coupling and the shutdown of the equipment, increasing maintenance and production costs, and affecting production efficiency. CONTENT OF THE INVENTION
[0006] In view of the above-mentioned deficiencies of the existing drum gear two-half coupling, the purpose of the embodiments of the present application is to provide a self-adaptive axial positioning device for a coupling, which actively adjusts the axial force of the half-coupling outer tooth sleeve by applying a pre-tightening elastic force inside the coupling, effectively solves the axial movement of the tooth coupling, and avoids the interference and wear of the tooth and other parts caused thereby.
[0007] To achieve the above object, the technical scheme adopted by the present application is: provide a kind of coupling self-adapting axial positioning device, comprising: respectively half coupling sleeve and left half coupling sleeve of driving shaft and driven shaft on sleeve connection, the right half coupling sleeve and left half coupling sleeve are connected by a plurality of bolts surrounding a circle, the end face of the right half coupling sleeve and the left half coupling sleeve is equipped with elastic member, the end face of the right half coupling sleeve and the left half coupling sleeve is equipped with limit groove, the two ends of the elastic member are respectively abutted on the bottom of the limit groove corresponding to the right half coupling sleeve and the left half coupling sleeve.
[0008] In one embodiment, the elastic member is a spring.
[0009] In one embodiment, the spring is a butterfly spring, air spring or hydraulic spring.
[0010] In one embodiment, the limit groove is a center large groove, the bottom surface of the center large groove is provided with an isolation top plate, and the two ends of the spring are respectively abutted on the two isolation top plates.
[0011] In one embodiment, the limit groove is an edge groove and is provided with a plurality of equal arc distances, and the spring is correspondingly provided with a plurality of equal arc distances, and the two ends of the spring are respectively abutted on the bottom of the corresponding edge groove.
[0012] In one embodiment, the outer side of the right half coupling sleeve and the left half coupling sleeve is provided with a right inner tooth sleeve and a left inner tooth sleeve, and the right inner tooth sleeve and the left inner tooth sleeve are fixedly connected by a plurality of bolts.
[0013] In one embodiment, the nuts of two adjacent bolts are respectively located at the ends of the right inner tooth sleeve and the left inner tooth sleeve.
[0014] In one embodiment, the end surface between the right inner tooth sleeve and the left inner tooth sleeve and the inner side thereof and the outer side between the right half coupling sleeve and the left half coupling sleeve are provided with a sealing ring.
[0015] The coupling self-adapting axial positioning device provided by the present application has the following advantages:
[0016] 1. The structure is simple and compact, and the reliability is high. The elastic member operates efficiently and stably in the compression cavity formed by the limit groove. The elastic member and other parts of the coupling do not have relative motion, and the elastic member can be effectively lubricated under the condition of injecting lubricating grease, so the service life is long.
[0017] 2. Few new parts are added, only two parts of elastic member and isolation top plate are added, and the rest can be machined by using the original tooth coupling structure, which has the advantages of easy machining and low manufacturing cost.
[0018] 3. The toothed coupling can be easily formed on the basis of the original toothed coupling to form a standard series of products, which is suitable for large-scale promotion and can better liberate productive forces. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0020] Figure 1 A cross-sectional structure schematic diagram of the coupling self-adaptive axial positioning device provided for Embodiment 1 of the present application;
[0021] Figure 2 A cross-sectional structure schematic diagram of the coupling self-adaptive axial positioning device provided for Embodiment 2 of the present application;
[0022] Figure 3 A left view structure schematic diagram of the right half coupling sleeve in the coupling self-adaptive axial positioning device provided for Embodiment 2 of the present application.
[0023] In the drawings, various reference signs represent:
[0024] 1. driving shaft; 2. driven shaft; 3. right half coupling sleeve; 4. left half coupling sleeve; 5. bolt; 51. nut; 6. elastic member; 7. center large groove; 8. isolation top plate; 9. edge groove; 10. right inner tooth sleeve; 11. left inner tooth sleeve; 12. sealing ring. DETAILED DESCRIPTION
[0025] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0028] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.
[0029] Embodiment 1:
[0030] As Figure 1 shown, a coupling self-adaptive axial positioning device provided by the embodiment of the present application will be described. The coupling self-adaptive axial positioning device comprises: right half coupling sleeves 3 and left half coupling sleeves 4 respectively sleeved on a driving shaft 1 and a driven shaft 2, the driving shaft 1 is a motor driving shaft, and the driven shaft 2 is an oil pump driven shaft; the driving shaft 1 and the right half coupling sleeve 3 are sleeved by means of key and key groove, and the driven shaft 2 and the left half coupling sleeve 4 are sleeved by means of toothed engagement; right inner toothed sleeves 10 and left inner toothed sleeves 11 are provided on the outer sides of the right half coupling sleeves 3 and the left half coupling sleeves 4 by toothed engagement, flanges are provided on the outer sides of the right inner toothed sleeves 10 and the left inner toothed sleeves 11, and the two flanges are fixedly connected by a plurality of bolts 5 surrounding a circle.
[0031] Among them, the bolt 5 is a standard part, including a screw rod, a gasket and a nut 51. And the nuts 51 of the two adjacent bolts 5 are respectively located at the ends away from each other of the right inner toothed sleeves 10 and the left inner toothed sleeves 11, that is, the directions of the nuts 51 are staggered on the outer sides of the right inner toothed sleeves 10 and the left inner toothed sleeves 11. Among them, the end faces between the right inner toothed sleeves 10 and the left inner toothed sleeves 11 and the inner sides thereof and the outer sides of the right half coupling sleeves 3 and the left half coupling sleeves 4 are provided with sealing rings 12.
[0032] The main improvement of the embodiment is that an elastic member 6 is arranged between the end faces of the right half coupling sleeve 3 and the left half coupling sleeve 4, the end faces of the right half coupling sleeve 3 and the left half coupling sleeve 4 are respectively provided with a limiting groove, and the two ends of the elastic member 6 are respectively abutted on the bottom of the corresponding limiting groove of the right half coupling sleeve 3 and the left half coupling sleeve 4. When the bolt 5 is tightened, the elastic member 6 is in a compressed state to generate elastic force, and the two ends of the elastic member 6 tightly abut against the right half coupling sleeve 3 and the left half coupling sleeve 4, at this time, the elastic force of the elastic member 6 is the axial pressure for preventing the axial movement of the half coupling sleeve, and the pressure is continuously provided, when the right half coupling sleeve 3 and the left half coupling sleeve 4 have any axial movement tendency, the elastic force of the elastic member 6 is offset, and the elastic member 6 has self-adapting adjustment ability for the axial and angular deviation of the half coupling sleeve, so that the meshing of the two groups of inner and outer teeth is ensured to be within the effective range at any time during the normal operation of the tooth coupling.
[0033] In the embodiment, the elastic member 6 is a spring, which can be a butterfly spring, an air spring or a hydraulic spring or other compression spring.
[0034] In the embodiment, the limiting groove is a center large groove 7, the center large groove 7 is in communication with the center hole of the right half coupling sleeve 3 and the left half coupling sleeve 4 and is a counterbore, the diameter of the limiting groove is greater than the diameter of the center hole, the bottom surface of the center large groove 7 is provided with an isolation top plate 8, the isolation top plate 8 is used to separate the spring from the driving shaft 1 and the driven shaft 2 to prevent the relative friction force between the spring and the shaft, and the two ends of the spring are respectively abutted on the two isolation top plates 8.
[0035] Embodiment 2:
[0036] The difference between the embodiment and the embodiment 1 is that the setting position and the number of the limiting groove are different from those of the embodiment 1. Specifically, as shown in Figure 2 and Figure 3 , the limiting groove is an edge groove 9 and a plurality of edge grooves 9 are arranged at equal arc distances, and a plurality of springs are correspondingly arranged, and the two ends of the spring are respectively abutted on the bottom of the corresponding edge groove 9. In actual production, the number of the built-in spring can be increased or decreased according to the required elastic force.
[0037] The above only describes the preferred embodiments of the application and is not used to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.
Claims
1. A shaft coupling adaptive axial positioning device, comprising: Right half coupling sleeve (3) and left half coupling sleeve (4) are respectively sleeved on driving shaft (1) and driven shaft (2), the right half coupling sleeve (3) and left half coupling sleeve (4) are connected by a plurality of bolts (5) surrounding a circle, characterized by: the right half coupling sleeve (3) and left half coupling sleeve (4) are provided with elastic members (6) between the end faces close to each other, the end faces close to each other of the right half coupling sleeve (3) and the left half coupling sleeve (4) are provided with limiting grooves, and the two ends of the elastic members (6) are respectively abutted on the bottom of the limiting grooves corresponding to the right half coupling sleeve (3) and the left half coupling sleeve (4).
2. The coupling adaptive axial positioning device of claim 1, wherein: The elastic member (6) is a spring.
3. The coupling adaptive axial positioning device of claim 2, wherein: The spring is a butterfly spring, an air spring or a hydraulic spring.
4. The coupling adaptive axial positioning device of claim 3, wherein: The limiting groove is a center large groove (7), and the bottom surface of the center large groove (7) is provided with an isolation top plate (8), and the two ends of the spring are respectively abutted on two isolation top plates (8).
5. The coupling adaptive axial positioning device of claim 3, wherein: The limiting groove is an edge groove (9) and is provided with a plurality of equal arc distances, and the spring is correspondingly provided with a plurality of equal arc distances, and the two ends of the spring are respectively abutted on the bottom of the corresponding edge groove (9).
6. A shaft coupling adaptive axial positioning device as set forth in any one of claims 1-5, characterized in that: The outer side of the right half coupling sleeve (3) and the left half coupling sleeve (4) is provided with a right inner tooth sleeve (10) and a left inner tooth sleeve (11), and the right inner tooth sleeve (10) and the left inner tooth sleeve (11) are fixedly connected by a plurality of bolts (5).
7. The coupling adaptive axial positioning device of claim 6, wherein: The nuts (51) of the two adjacent bolts (5) are respectively located at the ends away from each other of the right inner tooth sleeve (10) and the left inner tooth sleeve (11).
8. The coupling adaptive axial positioning device of claim 7, wherein: The end faces between the right inner tooth sleeve (10) and the left inner tooth sleeve (11) and the inner side thereof and the outer side of the right half coupling sleeve (3) and the left half coupling sleeve (4) are provided with sealing rings (12).