Bidirectional overrunning clutch

Abstract

The bidirectional overrunning clutch comprises a driving shaft and a driven shaft which are coaxially arranged, the driven shaft is arranged on the outer side of the driving shaft in a sleeved mode, the driven shaft comprises a sleeve and a quick release cylinder which are detachably connected, a retainer is arranged between the driven shaft and the driving shaft, and the retainer comprises an installation block arranged around the driving shaft. The mounting blocks are connected with pin rollers matched with the sleeve, the adjacent mounting blocks are connected through elastic pieces, a damping assembly is arranged in the quick release cylinder and comprises a transition cylinder located between the retainer and the sleeve, and damping modules are evenly arranged on the inner wall of the transition cylinder. The damping module comprises a mounting groove formed in the inner wall of the transition cylinder, and a friction column is movably mounted in the mounting groove. According to the utility model, through the arrangement of the sleeve, the quick release cylinder, the transition cylinder and the damping module, the purpose of quickly adjusting damping can be realized, the disassembly and assembly steps are effectively simplified, the time is greatly saved, the working efficiency is improved, and the practical application is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to clutch technical field, especially relates to bidirectional overrunning clutch. BACKGROUND

[0002] Bidirectional overrunning clutch as a kind of transmission assembly, through two ends and prime mover and working machine are connected, for the assembly between the power transmission or separation. Traditional overrunning clutch is mostly limited to one-way transmission, bidirectional overrunning clutch can satisfy bidirectional transmission demand, but there are complex structure, large volume, reversing stability is insufficient and other problems. In prior art, bidirectional clutch often relies on friction plate combination or complex trigger mechanism to realize function, but there is the defect that damping adjustment is inconvenient, and since assembly structure is relatively complex, dismounting difficulty is relatively large, especially in the process of debugging, it needs to be frequently dismounted relevant structure, step is tedious, waste time, it is not conducive to practical application. For this reason, we propose bidirectional overrunning clutch. CONTENT OF UTILITY MODEL

[0003] To solve the above problems, the utility model provides bidirectional overrunning clutch.

[0004] To realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] Design bidirectional overrunning clutch, including coaxial setting driving shaft and driven shaft, the driven shaft is sleeved on the outside of driving shaft, the driven shaft includes detachable connection sleeve and quick release cylinder, and the driven shaft is provided with retainer between driving shaft, the retainer includes installation block around driving shaft, the installation block is all connected with the roller matched with sleeve, adjacent installation block is connected through elastic member, the quick release cylinder is equipped with damping assembly, the damping assembly includes transition cylinder between retainer and sleeve, the inner wall of transition cylinder is evenly equipped with damping module, the damping module includes installation recess in the inner wall of transition cylinder, and the friction column is movably installed in the installation recess.

[0006] In the above scheme, the driving shaft includes a pair of interval setting connection section, coaxially fixed with driving section between adjacent connection section, and the cross section of driving section is polygonal.

[0007] In the above scheme, the elastic member is spring, and the two ends of elastic member are connected with adjacent installation block through fastening screw respectively.

[0008] In the above scheme, the sleeve end is fixed with flange one, the quick release cylinder end is fixed with flange two, and the flange one and flange two are connected through fastener.

[0009] In the above scheme, the transition cylinder is equipped with reserved port corresponding to roller one by one, and the installation recess is located between adjacent reserved port.

[0010] In the above scheme, a module base is engaged and connected in the mounting groove, the friction column is connected to the module base through a rotating shaft, and a torsion spring is sleeved on the rotating shaft, with its two ends respectively connected to the friction column and the inner wall of the module base.

[0011] In the above scheme, the surface of the friction column is uniformly provided with protrusions.

[0012] The advantages and beneficial effects of this utility model are as follows: By setting a sleeve, quick-release sleeve, transition sleeve, and damping module, and using fasteners, the sleeve and quick-release sleeve are coaxially assembled, indirectly allowing the transition sleeve and damping module located inside the quick-release sleeve to be assembled with the sleeve. The damping module is inserted between the cage and the sleeve, and the friction column replaces the mounting block to contact the inner wall of the sleeve. Compared with the prior art, when the drive shaft starts to rotate, the cage will not rotate with the drive shaft due to the restriction of the damping module. A speed difference can be generated between the cage and the drive shaft without the action of centrifugal force. The drive section of the drive shaft can then abut against and press the roller, driving the roller to push the mounting block outward until the roller fits with the inner wall of the sleeve. In addition, more importantly, during the debugging process, it is only necessary to disassemble the fasteners to separate the sleeve and quick-release sleeve, and replace the quick-release sleeve with one having a different number of damping modules to achieve the purpose of quick damping adjustment. This effectively simplifies the disassembly and assembly steps, saves a lot of time, improves work efficiency, and is beneficial to practical applications. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Fig. 1 This is an exploded view of the bidirectional overrunning clutch proposed in this utility model;

[0015] Fig. 2 This is a schematic diagram of the bidirectional overrunning clutch proposed in this utility model;

[0016] Fig. 3 This is a cross-sectional view of the transition cylinder of the bidirectional overrunning clutch proposed in this utility model.

[0017] In the diagram: drive shaft 1, drive section 10, connecting section 11, driven shaft 2, sleeve 20, quick release sleeve 21, flange one 22, flange two 23, cage 3, mounting block 30, roller 31, elastic element 32, fastening screw 33, damping assembly 4, transition sleeve 40, reserved opening 41, damping module 42, friction column 421, protrusion 422, mounting groove 423, module base 424, rotating shaft 425, torsion spring 426. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0019] Please see Figs. 1-3 This utility model provides a technical solution: a two-way overrunning clutch, including a driving shaft 1 and a driven shaft 2 arranged coaxially;

[0020] Furthermore, the drive shaft 1 includes a pair of spaced-apart connecting sections 11, with a drive section 10 coaxially fixed between adjacent connecting sections 11. The cross-section of the drive section 10 is polygonal so that the drive shaft 1 abuts against the mounting block 30 (hereinafter referred to as the mounting block 30) when rotating, thereby applying outward pressure to the mounting block 30, so that the roller 31 (hereinafter referred to as the roller 31) engages with the driven shaft 2.

[0021] Driven shaft 2 is sleeved on the outside of drive shaft 1. Driven shaft 2 includes a detachably connected sleeve 20 and quick-release sleeve 21. The inner wall of sleeve 20 is provided with a meshing groove that mates with mounting block 30 as described below.

[0022] Furthermore, flange 22 is fixed to the end of sleeve 20, and flange 23 is fixed to the end of quick-release sleeve 21. Flange 22 and flange 23 are connected by fasteners. By removing and installing the fasteners, quick-release sleeve 21 can be quickly removed and installed, exposing the internal structure of driven shaft 2 for replacement and adjustment of the internal structure.

[0023] A retainer 3 is provided between the driven shaft 2 and the driving shaft 1. The retainer 3 includes mounting blocks 30 arranged around the driving shaft 1. Each mounting block 30 is connected to a roller 31 that mates with the sleeve 20. Adjacent mounting blocks 30 are connected by an elastic element 32. When the retainer 3 reaches a certain speed, under the action of centrifugal force, the adjacent mounting blocks 30 will overcome the force of the elastic element 32 and be radially pushed outward relative to the driving shaft 1. The driven shaft 2 is sleeved on the outside of the retainer 3, and the meshing grooves are evenly distributed circumferentially along the inner wall of the sleeve 20. In this way, when the retainer 3 is pushed outward, the rollers 31 located on the retainer 3 can enter into the meshing grooves and mesh with them, thereby transmitting the power of the driving shaft 1 to the driven shaft 2, realizing the forward or reverse rotation of the driving shaft 1 to drive the driven shaft 2 to rotate.

[0024] Specifically, the drive section 10 has a maximum radial length H and a minimum radial length h. Since the inner wall of the meshing groove is arc-shaped, a circle is drawn with the driven shaft center as the center and the straight-line distance between the driven shaft center and the bottom of the meshing groove as the radius. The radius of this circle is R. A circle is drawn with the driven shaft center as the center and the straight-line distance between the driven shaft center and the end of the meshing groove as the radius. The radius of this circle is r. The diameter of the roller 31 is d. The above dimensions satisfy the following relationship: H+d>2R, h+d<2r. When the drive shaft 1 is not rotating, the roller 31 is relatively separated from the meshing groove, and the rotation of the driven shaft 2 cannot drive the drive shaft 1 to rotate in the opposite direction. However, since H+d>2R, the cage 3 can be driven to rotate when the drive shaft 1 rotates forward or in reverse. The centrifugal force on the cage 3 during rotation and the force of the drive shaft acting on the cage 3 and the roller 31 can be used to make the roller 31 enter the meshing groove, thereby driving the driven shaft 2 to rotate.

[0025] Furthermore, the elastic element 32 is a spring, and both ends of the elastic element 32 are connected to the adjacent mounting block 30 by fastening screws 33 respectively; thereby causing the mounting block 30 to expand outward and contract inward.

[0026] The quick-release cylinder 21 is equipped with a damping assembly 4. The damping assembly 4 includes a transition cylinder 40 located between the retainer 3 and the sleeve 20. The inner wall of the transition cylinder 40 is uniformly provided with damping modules 42. The damping module 42 includes a mounting groove 423 opened in the inner wall of the transition cylinder 40. Friction columns 421 are movably installed in the mounting groove 423. Corresponding to different central angles of the inner wall of the transition cylinder 40, the friction columns 421 can be set as a long strip or multiple short strips arranged at equal intervals. For the long strip friction columns 421, the damping can be adjusted by adjusting the number of friction columns 421 provided on the circumferential inner wall of the transition cylinder 40. For the short strip friction columns 421, not only the circumferential number can be adjusted, but also the number at the corresponding central angle can be adjusted to adjust the damping.

[0027] Furthermore, the transition cylinder 40 is provided with reserved openings 41 that correspond one-to-one with the rollers 31 to avoid interference with the rollers 31, and the mounting grooves 423 are located between adjacent reserved openings 41;

[0028] Furthermore, a module base 424 is engaged within the mounting groove 423. A locking block is fixed to the outer wall of the module base 424. The inner wall of the mounting groove 423 is provided with a slot for elastic assembly with the locking block, achieving a quick assembly and disassembly effect. The module base 424 can be assembled and disassembled as a whole, and the number of friction columns 421 can be quickly adjusted. The damping can be adjusted by adjusting the number of friction columns 421. The friction columns 421 are connected to the module base 424 through a rotating shaft 425. A torsion spring 426 is sleeved on the rotating shaft 425, with its two ends connected to the friction columns 421 and the inner wall of the module base 424, respectively. When the retainer 3 rotates, the mounting block 30 comes into contact with the friction column 421. The friction between the two causes the friction column 421 to rotate, which in turn causes the torsion spring 426 to be subjected to pressure and deform, thereby generating a reverse elastic force and thus producing a damping effect.

[0029] Furthermore, the surface of the friction column 421 is uniformly provided with protrusions 422; by using the protrusions 422, not only can the friction between the friction column 421 and the mounting block 30 be increased, but also the friction between the friction column 421 and the inner wall of the module base 424 can be increased, thereby suppressing the rotation of the friction column 421.

[0030] Specifically, by setting up a sleeve 20, a quick-release sleeve 21, a transition sleeve 40, and a damping module 42, and using fasteners, the sleeve 20 and the quick-release sleeve 21 are coaxially assembled. This indirectly assembles the transition sleeve and the damping module 42 located inside the quick-release sleeve 21 with the sleeve 20. The damping module 42 is then inserted between the retainer 3 and the sleeve 20. The friction post 421 replaces the mounting block 30 in contact with the inner wall of the sleeve 20. Compared to existing technologies, when the drive shaft 1 begins to rotate, the damping module 42 restricts the rotation of the retainer 3, preventing it from rotating with the drive shaft 1. Centrifugal force can generate a speed difference between the cage 3 and the drive shaft 1. The drive section 10 of the drive shaft 1 can then press against the roller 31 and drive the roller 31 to push the mounting block 30 outward until the roller 31 fits into the inner wall of the sleeve 20. More importantly, during the debugging process, it is only necessary to disassemble the fasteners to separate the sleeve 20 and the quick-release sleeve 21, and replace the quick-release sleeve 21 with one having a different number of damping modules 42. This can achieve the purpose of quickly adjusting the damping, effectively simplifying the disassembly and assembly steps, saving a lot of time, improving work efficiency, and benefiting practical applications.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Bidirectional overrunning clutch comprising a driving shaft (1) and a driven shaft (2) arranged coaxially, characterized in that, The driven shaft (2) is sleeved outside the driving shaft (1), the driven shaft (2) comprises a detachable sleeve (20) and a quick release cylinder (21), a retainer (3) is arranged between the driven shaft (2) and the driving shaft (1), the retainer (3) comprises a mounting block (30) arranged around the driving shaft (1), the mounting block (30) is connected with a roller (31) matched with the sleeve (20), adjacent mounting blocks (30) are connected by elastic members (32), the quick release cylinder (21) is fixedly provided with a damping assembly (4) inside, the damping assembly (4) comprises a transition cylinder (40) between the retainer (3) and the sleeve (20), the inner wall of the transition cylinder (40) is uniformly provided with a damping module (42), the damping module (42) comprises a mounting groove (423) formed in the inner wall of the transition cylinder (40), and a friction column (421) is movably arranged in the mounting groove (423).

2. The bi-directional overrunning clutch of claim 1, wherein, The driving shaft (1) comprises a pair of spaced apart connecting segments (11), and a driving segment (10) is coaxially fixed between adjacent connecting segments (11), and the cross section of the driving segment (10) is polygonal.

3. The bi-directional overrunning clutch of claim 1, wherein, The elastic member (32) is a spring, and the two ends of the elastic member (32) are connected with adjacent mounting blocks (30) by fastening screws (33).

4. The bi-directional overrunning clutch of claim 1, wherein, The sleeve (20) is fixedly provided with a flange one (22) at the end, the quick release cylinder (21) is fixedly provided with a flange two (23) at the end, and the flange one (22) and the flange two (23) are connected by fastening members.

5. The bi-directional overrunning clutch of claim 1, wherein, The transition cylinder (40) is provided with a reserved port (41) corresponding to the roller (31) one by one, and the mounting groove (423) is located between adjacent reserved ports (41).

6. The bi-directional overrunning clutch of claim 5, wherein, The mounting groove (423) is hingedly connected with a module base (424), the friction column (421) is connected with the module base (424) by a rotating shaft (425), and the rotating shaft (425) is sleeved with a torsional spring (426) having two ends connected with the inner wall of the friction column (421) and the module base (424).

7. The bi-directional overrunning clutch of claim 1, wherein, The surface of the friction column (421) is uniformly provided with a protruding block (422).

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