Novel one-way overrunning coupler

Abstract

The utility model discloses a novel one-way overrunning coupler which comprises a driving sleeve, a driving shaft is rotatably connected in the driving sleeve, a one-way clutch assembly is connected to the driving shaft, the one-way clutch assembly is connected with the driving sleeve through a transmission flat key, and when the one-way clutch assembly is locked, the driving shaft transmits power to the driving sleeve through the one-way clutch assembly. When the one-way clutch assembly is not locked, the driving shaft idles in the driving sleeve, power cannot be transmitted to the driving sleeve, the side, in the axial direction, of the driving sleeve is fixedly connected with a driven sleeve, and a driven shaft is connected into the driven sleeve; the device is simple and compact in structure and convenient to disassemble, assemble and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field, especially a new one -way overrunning coupling. BACKGROUND

[0002] In the field of mechanical transmission, the coupling is a key component for connecting two shafts or a shaft and a rotating part to rotate together to transmit motion and torque. It is mainly used to connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit torque. In power transmission, it has various forms, and has the functions of buffering, shock absorption and improving the dynamic performance of the shafting. The performance of the coupling has a crucial impact on the stability, reliability and efficiency of the entire transmission system.

[0003] The existing one-way coupling has the problems of complex structure and large size in actual application. The complex structure increases the difficulty and cost of manufacturing, making the installation, debugging and maintenance process cumbersome, and the failure rate is high and difficult to repair. The large size is harsh for the space layout of the equipment, limiting its application in space-limited equipment. Therefore, it is a technical problem to be solved in this field to develop a one-way coupling with simple and compact structure, easy to disassemble and maintain. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above and / or existing problems in the one-way coupling, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a new one-way overrunning coupling with simple and compact structure, easy to disassemble and maintain.

[0007] To solve the above technical problems, the utility model provides the following technical scheme: a new one-way overrunning coupling, which comprises a driving sleeve, a driving shaft rotatably connected in the driving sleeve, a one-way clutch assembly connected to the driving shaft, the one-way clutch assembly connected to the driving sleeve through a transmission flat key, when the one-way clutch assembly is locked, the driving shaft transmits power to the driving sleeve through the one-way clutch assembly, when the one-way clutch assembly is not locked, the driving shaft idles in the driving sleeve and does not transmit power to the driving sleeve, and the driving sleeve is fixedly connected to a driven sleeve on one side in the axial direction, and the driven sleeve is connected to a driven shaft.

[0008] As a further improvement of the utility model, the one-way clutch assembly comprises an inner star wheel connected to the driving shaft, the inner star wheel is rotationally connected with an inner retainer, the inner retainer is arranged with a plurality of inner installation openings, the inner retainer is connected with a wedge block through the inner installation opening, the inner side of the driving sleeve is rotationally connected with an outer ring, the outer edge of the wedge block abuts against the inner side of the outer ring, the wedge block has a curved surface at one end in the radial direction relative to the inner retainer, and the curved surface abuts against the outer edge of the inner retainer at one end, and the curved surface at one end bends towards the direction of the outer ring at the other end.

[0009] As a further improvement of the utility model, the inner retainer is sleeved with an outer retainer, the outer retainer is arranged with a plurality of outer installation openings corresponding to the inner installation openings one by one, a circular spring holder is connected between the outer retainer and the inner retainer, the spring holder is arranged with a plurality of plug-in openings corresponding to the inner installation openings one by one, the wedge block is plugged into the corresponding plug-in opening through the outer installation opening and the plug-in opening in sequence, one end of the spring holder at one end in the circumferential direction of the plug-in opening is fixedly connected with one end of an elastic sheet, and the other end of the elastic sheet abuts against the outer side of the wedge block and is bent towards the direction of the inner star wheel.

[0010] As a further improvement of the utility model, the outer retainer is axially sleeved with a retaining ring at both ends of the outer retainer, the inner star wheel is further clamped with two clamping springs arranged at intervals in the axial direction, and the two clamping springs limit the outer retainer between the two clamping springs.

[0011] As a further improvement of the utility model, the utility model further comprises a thrust ball bearing, the thrust ball bearing comprises a bearing tight ring rotationally connected to the inner star wheel and arranged close to one end of the driven sleeve, the driven sleeve is internally connected with a bearing loose ring, and the driven sleeve is internally connected with a ball retainer between the bearing loose ring and the bearing tight ring.

[0012] As a further improvement of the utility model, the driving sleeve is fixedly connected with a limiting pre-tightening cover sleeved on the driving shaft on the side away from the driven sleeve, and the side of the limiting pre-tightening cover in the axial direction towards the inside is attached to one end of the outer ring in the axial direction away from the driven sleeve.

[0013] As a further improvement of the utility model, the driving sleeve is arranged with a plurality of first connecting holes, and the driven sleeve is arranged with a plurality of second connecting holes corresponding to the first connecting holes one by one.

[0014] As a further improvement of the utility model, the end of the driving sleeve away from the driven sleeve is arranged with a plurality of connecting counterbores, and the limiting pre-tightening cover is arranged with a plurality of fixed holes corresponding to the connecting counterbores one by one.

[0015] Compared with the prior art, the utility model has the following technical effects: the one-way clutch assembly is integrated in the driving sleeve, the structure is compact, the volume is small, and the overall structure is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings. Among them:

[0017] Figure 1 It is an internal structure diagram of the present application.

[0018] Figure 2 It is a partial enlarged view of A in the figure. Figure 1

[0019] Figure 3 It is a sectional view of the present application.

[0020] Figure 4 It is a partial enlarged view of B in the figure. Figure 3

[0021] Figure 5 It is a partial structure enlarged view of the present application in which the limit pre-tightening cover and the driving sleeve are connected together.

[0022] Figure 6 It is a three-dimensional structure diagram of the spring frame in the present application.

[0023] In the figure, 1 is a driven sleeve, 101 is a second connecting hole, 2 is a driving sleeve, 201 is a first connecting hole, 202 is a connecting counterbore, 3 is a limit pre-tightening cover, 301 is a fixing hole, 4 is an outer ring, 5 is an inner star wheel, 6 is a driving shaft, 7 is a driven shaft, 8 is a thrust ball bearing, 801 is a bearing loose ring, 802 is a ball retainer, 802-1 is a ball, 803 is a bearing tight ring, 9 is a wedge block, 10 is a snap spring, 11 is a check ring, 12 is an inner retainer, 1201 is an inner mounting port, 13 is a spring frame, 1301 is an elastic sheet, 1302 is a plug-in port, 14 is an outer retainer, 1401 is an outer mounting port, 15 is a nut, 16 is a fixing bolt, and 17 is a fixing screw. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0025] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0026] ​​Secondly, the "one embodiment" or "embodiment" referred to herein is intended to mean a specific feature, structure, characteristic, or combination of features and characteristics described herein that is included in at least one implementation of the present application. The various appearances of "in one embodiment" or "in an embodiment" in the specification are not necessarily all referring to the same embodiment.

[0027] Embodiment 1

[0028] With reference to Figures 1-6 For the first embodiment of the present application, the embodiment provides a novel one-way overrunning coupling, which is simple and compact in structure and realizes one-way transmission of the driving sleeve 2 to the driven shaft 7.

[0029] The novel one-way overrunning coupling comprises a driving sleeve 2, a driving shaft 6 rotatably connected in the driving sleeve 2, a one-way clutch assembly connected to the driving shaft 6, the one-way clutch assembly being connected to the driving sleeve 2 through a driving flat key, when the one-way clutch assembly is locked, the driving shaft 6 transmits power to the driving sleeve 2 through the one-way clutch assembly, when the one-way clutch assembly is not locked, the driving shaft 6 idles in the driving sleeve 2 and does not transmit power to the driving sleeve 2, the driving sleeve 2 is fixedly connected to a driven sleeve 1 on one side in the axial direction, and the driven sleeve 1 is connected to a driven shaft 7.

[0030] Specifically, the one-way clutch assembly comprises an inner star wheel 5 connected to the driving shaft 6, the inner star wheel 5 being rotatably connected to an inner retainer 12, the inner retainer 12 being arranged with a plurality of inner mounting holes 1201, the inside of the driving sleeve 2 being connected to an outer ring 4 through a flat key, the outer edge of a wedge block 9 abutting against the inside of the outer ring 4, the wedge block 9 having a curved surface on one end thereof in the radial direction and abutting against the outer edge of the inner retainer 12, the curved surface being curved from one end thereof to the other end thereof in the direction of the outer ring 4, the inner retainer 12 being sleeved with an outer retainer 14, the outer retainer 14 being arranged with a plurality of outer mounting holes 1401 corresponding to the inner mounting holes 1201, the outer retainer 14 being inserted with the wedge block 9 through the outer mounting holes 1401 and the inner retainer 12 through the inner mounting holes 1201, the inner retainer 12 being used to fix the position of the wedge block 9, maintain the optimal self-locking angle thereof, ensure the reliable action of counterclockwise locking and clockwise separation, and prevent the wedge block 9 from deviating due to centrifugal force at high speed and evenly disperse the load to reduce wear.

[0031] With Figure 3For reference, one end of the curved surface is a relatively gentle surface, and the slope of the curved surface from one end to the other end is a steep surface. The slope of the relatively gentle surface has an angle of elevation not greater than a friction angle. The wedge 9 is locked between the inner ring gear 5 and the outer ring 4. The slope of the steep surface has an angle of elevation greater than the friction angle. The wedge 9 and the inner retainer 12 are not locked, that is, when the driving shaft 6 rotates counterclockwise, the wedge 9 is locked, the driving shaft 6 drives the inner ring gear 5 to rotate, the inner ring gear 5 drives the outer ring 4 and the outer retainer 14 to rotate through the wedge 9, the outer ring 4 drives the driving sleeve 2 to rotate, and the driving sleeve 2 drives the driven shaft 7 to rotate through the driven sleeve 1, thereby realizing power transmission between the driving shaft 6 and the driven shaft 7. When the driving shaft 6 rotates clockwise, the wedge 9 is not locked, the driving shaft 6 drives the inner ring gear 5 to rotate, the wedge 9 and the outer ring 4 do not rotate, and the driving sleeve 2 also does not rotate. At this time, the driven shaft 7 does not rotate, that is, the rotation of the driving sleeve 2 to the driven sleeve 1 can only be unidirectional rotation.

[0032] Specifically, the outer retainer 14 and the inner retainer 12 are connected with a circular spring holder 13, the spring holder 13 is arranged with a plurality of plug-in interfaces 1302 corresponding to the inner mounting holes 1201, and the wedge 9 is sequentially inserted into the corresponding plug-in interfaces 1302 through the outer mounting holes 1401 and the plug-in interfaces 1302. One end of the spring holder 13 at one end of the plug-in interface 1302 in the circumferential direction is fixedly connected with one end of an elastic sheet 1301, and the other end of the elastic sheet 1301 abuts against the outer side of the wedge 9 and is bent towards the direction of the inner ring gear 5.

[0033] The wedge 9 is placed in the inner mounting hole 1201 of the inner retainer 12, and then the spring holder 13 is installed. In the initial state, the elastic sheet 1301 is in a compressed state, the spring holder 13 makes the elastic sheet 1301 elastically deform by pre-tightening force, the accumulated restoring force makes the elastic sheet 1301 tightly adhere to the wedge 9, thereby ensuring the initial contact stability. The elastic sheet 1301 acts on the wedge 9 with elastic restoring force to make the wedge 9 tightly adhere to the inner and outer rings, this force promotes the wedge 9 to contact the inner ring gear 5 and the outer ring 4 and generate friction force, thereby realizing the one-way clutch function. In the static state, the spring sheet can fix the position of the wedge 9 to prevent deviation. When the driving shaft 6 rotates counterclockwise, the wedge 9 remains in the locked state under the action of the friction force and the elastic sheet 1301, and the power is transmitted. When the driving shaft 6 rotates clockwise, the elastic potential energy of the elastic sheet 1301 is released, and the wedge 9 is assisted to release the locked state, thereby reducing wear.

[0034] After the spring holder 13 is installed, the outer retainer 14 is installed, which fixes the relative position of the outer ring 4 and the wedge 9, ensures the rigidity of the overall structure, prevents failure due to stress deformation, provides low-friction guidance in the free rotation direction (non-locking side), reduces the sliding wear between the wedge 9 and the outer ring 4, and isolates external contaminants to protect the service life of the internal wedge 9 and the spring holder 13. The wedge 9 and the outer ring 4 are fixed by non-rigid fixing, and the inner wall of the outer ring 4 is processed with a plurality of wedge-shaped raceways corresponding to the wedge 9, and the profile of the wedge-shaped raceways matches the shape of the wedge 9.

[0035] Specifically, the outer retainer 14 is sleeved with a check ring 11 at each end in the axial direction, and the inner star wheel 5 is further clamped with two clamping springs 10 arranged at intervals in the axial direction, so that the outer retainer 14 is limited between the two clamping springs 10, and the driving sleeve 2 is fixedly connected with a limiting pre-tightening cover 3 sleeved on the driving shaft 6, and the limiting pre-tightening cover 3 is attached to the end of the outer ring 4 away from the driven sleeve 1 in the axial direction.

[0036] The combined arrangement of the check ring 11 and the clamping spring 10 fixes the axial position of the outer retainer 14 on the driving shaft 6, and the limiting pre-tightening cover 3 axially positions the left end of the outer ring 4, further improving the reliability of the connection of the outer ring 4 in the driving sleeve 2.

[0037] Specifically, the driving sleeve 2 is arranged with a plurality of first connecting holes 201, the driven sleeve 1 is arranged with a plurality of second connecting holes 101 corresponding to the first connecting holes 201, and the end of the driving sleeve 2 away from the driven sleeve 1 is arranged with a plurality of connecting counterbores 202, and the limiting pre-tightening cover 3 is arranged with a plurality of fixing holes 301 corresponding to the connecting counterbores 202.

[0038] After the inner star wheel 5 is connected to the driving shaft 6 by means of a flat key, and the one-way clutch assembly, the check ring 11 and the clamping spring 10 are connected to the inner star wheel 5, the fixing screws 17 are first screwed into the fixing holes 301 and the corresponding connecting counterbores 202, the fixing bolt 16 is pressed against the left side of the limiting pre-tightening cover 3, one end of the driving shaft 6 passes through the limiting pre-tightening cover 3, and then the driven sleeve 1 is attached to the right side of the driving sleeve 2, so that the second connecting holes 101 are aligned with the first connecting holes 201, the fixing bolts 16 are screwed into the second connecting holes 101 and the first connecting holes 201, the nuts 15 are screwed onto the fixing bolts 16, and the nuts 15 abut against the driving sleeve 2, thereby realizing the fixed connection of the driven sleeve 1, the driving sleeve 2 and the limiting pre-tightening cover 3, and facilitating the connection.

[0039] Embodiment 2

[0040] Reference Figure 1 and Figure 2 This embodiment is different from the previous embodiment in that it can further improve the reliability of the structure of the inner star wheel 5 connected in the driving sleeve 2 and the driven sleeve 1.

[0041] Specifically, it also includes a thrust ball bearing 8, which includes a bearing retaining ring 803 connected to the inner star wheel 5 and located close to one end of the driven sleeve 1. The bearing retaining ring 803 and the raised platform of the inner star wheel 5 are tightly fitted with an interference fit. A bearing loose ring 801 is connected inside the driven sleeve 1. The right side of the bearing loose ring 801 is attached to the driven sleeve 1. A ball retainer 802 is connected inside the driven sleeve 1 between the bearing loose ring 801 and the bearing retaining ring 803. A number of balls 802-1 are arranged on the ball retainer 802. The two ends of the balls 802-1 in the axial direction are respectively in the raceways of the bearing retaining ring 803 and the bearing loose ring 801.

[0042] Before the driven sleeve 1 is fixedly connected to the driving sleeve 2, the bearing retaining ring 803 is first pressed onto the inner star wheel 5, with the left side of the bearing retaining ring 803 fitting against the shoulder of the right end of the inner star wheel 5. Then, the bearing loose ring 801 is installed inside the driven sleeve 1. Next, several balls on the ball cage 802 are placed on several raceways of the bearing loose ring 801. Finally, the driven sleeve 1 is fixedly connected to the driving sleeve 2. During installation, the axial alignment of the thrust ball bearing must be ensured to avoid misalignment. The axial positioning of the right end of the inner star wheel 5 is achieved through the thrust ball bearing 8, further improving the reliability of the axial connection structure of the inner star wheel 5.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. The left and right directions in this application refer to... Figure 1 For reference, the horizontal direction parallel to the paper is the left-right direction. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A new type of one-way overrunning coupling characterized by: The application relates to a driving sleeve, a driving shaft is rotatably connected in the driving sleeve, a one-way clutch assembly is connected on the driving shaft, the one-way clutch assembly is connected with the driving sleeve through a driving flat key, when the one-way clutch assembly is locked, the driving shaft transmits power to the driving sleeve through the one-way clutch assembly, when the one-way clutch assembly is not locked, the driving shaft idles in the driving sleeve and cannot transmit power to the driving sleeve, one side of the driving sleeve in the axial direction is fixedly connected with a driven sleeve, and a driven shaft is connected in the driven sleeve; the one-way clutch assembly comprises an inner star wheel connected on the driving shaft, an inner retainer is rotatably connected on the inner star wheel, a plurality of inner installation ports are arranged on the inner retainer, the inner retainer is connected with a wedge through the inner installation ports, an outer ring is rotatably connected on the inner side of the driving sleeve, the outer edge of the wedge abuts against the inner side of the outer ring, one end of the curved surface of the wedge abuts against the outer edge of the inner retainer, and the other end of the curved surface bends towards the outer ring; an outer retainer is sleeved on the inner retainer, a plurality of outer installation ports corresponding to the inner installation ports are arranged on the outer retainer, a circular spring holder is connected between the outer retainer and the inner retainer, a plurality of plug-in ports corresponding to the inner installation ports are arranged on the spring holder, the wedge is plugged into the corresponding plug-in port through the outer installation port and the plug-in port, one end of an elastic sheet is fixedly connected on one end of the spring holder in the circumferential direction of the plug-in port, and the other end of the elastic sheet abuts against the outer side of the wedge and bends towards the inner star wheel; a stop ring is sleeved on the inner star wheel at the outer ends of the outer retainer in the axial direction, and two clamping springs are clamped on the inner star wheel and are arranged at intervals in the axial direction, so that the outer retainer is limited between the two clamping springs.

2. The new type one-way overrunning coupling as claimed in claim 1, characterized in that: The application also relates to a thrust ball bearing, the thrust ball bearing comprises a bearing tight ring rotatably connected on the inner star wheel and arranged close to one end of the driven sleeve, a bearing loose ring is connected in the driven sleeve, and a ball retainer is connected between the bearing tight ring and the bearing loose ring.

3. The new type one-way overrunning coupling as claimed in claim 2, characterized in that: The driving sleeve is fixedly connected with a limiting pre-tightening cover sleeved on the driving shaft on the side away from the driven sleeve, and the limiting pre-tightening cover is attached to one end of the outer ring away from the driven sleeve in the axial direction.

4. A new one-way overrunning coupling according to any one of claims 1 to 3, characterized in that: A plurality of first connecting holes are arranged on the driving sleeve, and a plurality of second connecting holes corresponding to the first connecting holes are arranged on the driven sleeve.

5. The new type one-way overrunning coupling as claimed in claim 3, wherein: A plurality of connecting counterbores are arranged on one end of the driving sleeve away from the driven sleeve, and a plurality of fixed holes corresponding to the connecting counterbores are arranged on the limiting pre-tightening cover.

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