TWM661510U - Clutch gear assembly, transmission clutch mechanism and wheelchair - Google Patents

Abstract

A clutch gear assembly includes a clutch transmission gear, a first gear, a second gear and a rotating plate. The first gear includes a plurality of first lateral teeth and a plurality of first face teeth. The second gear faces toward the first gear and includes a plurality of second lateral teeth and a plurality of second face teeth. The second face teeth are selectively engaged with the first face teeth. The rotating plate is sandwiched between the first gear and the second gear and is rotatably restricted by the clutch transmission gear. The second face teeth of the second gear are engaged with the first face teeth as the second gear is in a first position. As the clutch transmission gear is rotated in a first direction, the first gear is rotated by the second gear in the first direction. As the clutch transmission gear is rotated in a second direction, the second gear is switched to a second position by pushing of the rotating plate, thereby separating the second face teeth and the first face teeth. The rotating plate rotates the second gear in the second direction and is not restricted by the first gear. Therefore, a clutch effect is achieved.

Description

Clutch gear set, transmission clutch mechanism and wheelchair

The present invention relates to a gear set, a transmission mechanism and a wheelchair, in particular to a clutch gear set, a transmission clutch mechanism and a wheelchair.

Wheelchairs are one of the most common assistive devices that can help people with limited mobility or the elderly move around. Conventional wheelchairs include wheels and control wheels. The control wheels are arranged on the wheels. When the user turns the control wheels by hand, the wheels can be driven to rotate so that the wheelchair can move forward or backward. However, this method of turning the control wheels by hand requires greater force, so it is limited to the user group.

Therefore, some people have developed a hand-lever driven wheelchair, which is a hand-lever installed on the wheelchair, and the user can push and pull the hand-lever to link the wheel to rotate. In order to allow the hand-lever driven wheelchair to have the function of moving forward and backward, a clutch is set in the transmission mechanism in the wheelchair, and the clutch state of the clutch is changed by a reversing button or a reversing handle to switch between moving forward and backward. However, this method is not convenient in operation and still needs to be improved.

In view of this, how to improve the structure of related components to enhance the convenience of wheelchair use has become the goal of related industries.

In order to solve the above problems, the present invention provides a clutch gear set, a transmission clutch mechanism and a wheelchair. Through the structure of the clutch gear set, a clutch effect can be achieved to perform transmission of different mechanisms, facilitate the matching of drive components, and improve the convenience of use.

According to one embodiment of the present invention, a clutch gear set is provided, comprising a clutch transmission gear, a first gear, a second gear and a rotating disk. The clutch transmission gear has an axis. The first gear is arranged on one side of the clutch transmission gear along the axis and comprises a plurality of first side teeth and a plurality of first face teeth. The second gear faces the first gear along the axis and comprises a plurality of second side teeth and a plurality of second face teeth, and the plurality of second face teeth are used to selectively engage with the plurality of first face teeth. The rotating disk is sandwiched between the first gear and the second gear and is rotationally limited with the clutch transmission gear. When the second gear is located at a first position, the plurality of second face teeth mesh with the plurality of first face teeth. When the clutch transmission gear is driven to rotate in a first direction, the rotating disk pushes the second gear, so that the second gear links the first gear to rotate in the first direction. When the clutch transmission gear is driven to rotate in a second direction, the rotating disk pushes the second gear to move to a second position relative to the first gear on the axis to separate the plurality of second face teeth and the plurality of first face teeth, and the rotating disk drives the second gear to rotate in the second direction without being restricted by the first gear.

Thus, through the configuration of the clutch gear set, the first gear and the second gear can be linked in the first direction, but not in the second direction, thereby increasing the flexibility of the transmission configuration.

According to an embodiment of the aforementioned clutch gear set, the first gear may further include a first gear body and a first groove, the first groove is recessed in the first gear body, the aforementioned plurality of first side gear rings are disposed on a side edge of the first gear body, the aforementioned plurality of first face teeth protrude along the axis and surround the first groove; the second gear further includes a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the aforementioned plurality of second side gear rings are disposed on a side edge of the second gear body, the aforementioned plurality of second face teeth protrude along the axis and surround the second groove, and the rotating plate is disposed in the first groove and protrudes into the second groove.

According to an embodiment of the aforementioned clutch gear set, the rotating disk may include a disk body, a guide bevel block and a driving portion, the guide bevel block protrudes from the disk body toward the second gear and includes a top portion, the driving portion is protruded on the top portion of the guide bevel block, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in the first direction, the guide bevel block pushes the protrusion, and when the clutch transmission gear is driven to rotate in the second direction, the guide bevel block guides the protrusion to make the second gear relatively away from the first gear.

According to an embodiment of the aforementioned clutch gear set, the clutch transmission gear may include a connecting shaft and two engaging grooves, the connecting shaft protrudes toward the first gear and is provided for the first gear, the rotating plate and the second gear to be sleeved, the two engaging grooves are recessed in the connecting shaft, and the rotating plate includes two engaging protrusions, and the two engaging protrusions are respectively engaged with the two engaging grooves.

According to another embodiment of the present invention, a transmission clutch mechanism is provided, comprising a first transmission gear, a second transmission gear and a clutch gear set. The clutch gear set is operably coupled to the first transmission gear and the second transmission gear and comprises a clutch transmission gear, a first gear, a second gear and a rotating disk. The clutch transmission gear has an axis and is engaged with the second transmission gear. The first gear is arranged on one side of the clutch transmission gear along the axis and comprises a plurality of first side teeth and a plurality of first face teeth, and the first gear is engaged with the first transmission gear through the plurality of first side teeth. The second gear faces the first gear along the axis and includes a plurality of second side teeth and a plurality of second face teeth, and the plurality of second face teeth are used to selectively engage with the plurality of first face teeth. The turntable is sandwiched between the first gear and the second gear and is rotationally limited with the clutch transmission gear. The second gear is positioned at a first position or a second position. When the second gear is located at the first position, the plurality of second face teeth engage with the plurality of first face teeth. When the first gear is driven by the first transmission gear to rotate in a first direction, the first gear links the second gear to rotate in the first direction; when the clutch transmission gear is driven by the second transmission gear to rotate in the first direction, the turntable The second gear is pushed, so that the second gear links with the first gear to rotate in the first direction; when the clutch transmission gear is driven by the second transmission gear to rotate in the second direction, the rotating disk pushes the second gear to move to the second position relative to the first gear on the axis to separate the plurality of second face teeth and the plurality of first face teeth, and the rotating disk drives the second gear to rotate in the second direction without being restricted by the first gear.

According to an embodiment of the transmission clutch mechanism described above, it may further include a first one-way gear set and a second one-way gear set. The first one-way gear set includes a first driving wheel and a first connecting wheel. The first driving wheel is driven by a first driving member, the first connecting wheel is overlapped on the first driving wheel and connected with the first driving wheel in a first direction, and the first connecting wheel is engaged with the first transmission gear. The second one-way gear set includes a second driving wheel and a second connecting wheel. The second driving wheel is engaged with the first driving wheel, the second connecting wheel is overlapped on the second driving wheel and connected with the second driving wheel in the first direction, and the second connecting wheel is engaged with the first transmission gear.

According to an embodiment of the transmission clutch mechanism described above, the first one-way gear set may further include a first pawl, which is movably connected to the first connecting wheel, and the first driving wheel includes a plurality of first ratchets that engage with the first pawl in a first direction and separate in a second direction; the second one-way gear set further includes a second pawl, which is movably connected to the second connecting wheel, and the second driving wheel includes a plurality of second ratchets that engage with the second pawl in the first direction and separate in the second direction.

According to an embodiment of the aforementioned transmission clutch mechanism, the first gear may further include a first gear body and a first groove, the first groove is recessed in the first gear body, the aforementioned plurality of first side gear rings are disposed on a side edge of the first gear body, the aforementioned plurality of first face teeth protrude along the axis and surround the first groove; the second gear further includes a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the aforementioned plurality of second side gear rings are disposed on a side edge of the second gear body, the aforementioned plurality of second face teeth protrude along the axis and surround the second groove, and the rotating plate is disposed in the first groove and protrudes into the second groove.

According to an embodiment of the aforementioned transmission clutch mechanism, the rotating disk may include a disk body, a guide bevel block and a driving portion, the guide bevel block protrudes from the disk body toward the second gear and includes a top portion, the driving portion is protruded on the top portion of the guide bevel block, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in a first direction, the guide bevel block pushes the protrusion, and when the clutch transmission gear is driven to rotate in a second direction, the guide bevel block guides the protrusion to make the second gear relatively away from the first gear.

According to another embodiment of the present invention, a wheelchair is provided, comprising a chair frame, a first driving member, a second driving member, a transmission clutch mechanism and a wheel. The first driving member is movably disposed on the chair frame. The second driving member is movably disposed on the chair frame. The transmission clutch mechanism is movably disposed on the chair frame and comprises a first transmission gear, a second transmission gear and a clutch gear set. The first transmission gear is driven by the first driving member, and the second transmission gear is driven by the second driving member. The clutch gear set is operably coupled to the first transmission gear and the second transmission gear and comprises a clutch transmission gear, a first gear, a second gear and a rotating disk. The clutch transmission gear has an axis and is engaged with the second transmission gear. The first gear is arranged on one side of the clutch transmission gear along the axis and includes a plurality of first side teeth and a plurality of first face teeth. The first gear is engaged with the first transmission gear through the plurality of first side teeth. The second gear faces the first gear along the axis and includes a plurality of second side teeth and a plurality of second face teeth. The plurality of second face teeth are used to selectively engage with the plurality of first face teeth. The turntable is sandwiched between the first gear and the second gear and is rotationally limited with the clutch transmission gear. The wheel is pivoted on the chair frame and is linked to the second gear. The second gear is positioned at a first position or a second position. When the second gear is at the first position, the plurality of second face gears are engaged with the plurality of first face gears. When the first driving member drives the first transmission gear to rotate the first gear in a first direction, the first gear links the second gear to allow the wheel to rotate in a second direction. When the second driving member drives the second transmission gear to rotate the clutch transmission gear in the first direction, the turntable The second gear is pushed so that the second gear links with the first gear to allow the wheel to rotate in the second direction; when the second driving member drives the second transmission gear to rotate the clutch transmission gear in the second direction, the turntable pushes the second gear to move to the second position relative to the first gear on the axis to separate the plurality of second face teeth and the plurality of first face teeth, and the turntable drives the second gear to allow the wheel to rotate in the first direction without being restricted by the first gear.

According to an embodiment of the aforementioned wheelchair, the transmission clutch mechanism may further include an axle, a wheel sleeve and a wheel gear. One end of the axle is provided with a second transmission gear sleeve and is rotationally connected with the second transmission gear, and the other end is connected to the second drive member. The wheel sleeve is sleeved on the axle and is located between the second drive member and the second transmission gear. The wheel gear is sleeved on the wheel sleeve and is rotationally connected with the wheel sleeve, and the wheel gear is engaged with the second gear.

According to an embodiment of the aforementioned wheelchair, the second driving member may have a rotating wheel structure, and the second driving member drives the axle to rotate in conjunction with the second transmission gear.

According to an embodiment of the aforementioned wheelchair, the first driving member may have a push rod structure and include a plurality of push rod teeth, and the plurality of push rod teeth drive the first transmission gear.

According to an embodiment of the aforementioned wheelchair, the first gear may further include a first gear body and a first groove, the first groove is recessed in the first gear body, the aforementioned plurality of first side gear rings are disposed on a side edge of the first gear body, and the aforementioned plurality of first face teeth protrude along the axis and surround the first groove; the second gear further includes a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the aforementioned plurality of second side gear rings are disposed on a side edge of the second gear body, the aforementioned plurality of second face teeth protrude along the axis and surround the second groove, and the turntable is disposed in the first groove and protrudes into the second groove.

According to an embodiment of the aforementioned wheelchair, the turntable may include a disc body, a guide bevel and a driving portion, the guide bevel protrudes from the disc body toward the second gear and includes a top portion, the driving portion is protruded from the top portion of the guide bevel, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in the first direction, the guide bevel pushes the protrusion, and when the clutch transmission gear is driven to rotate in the second direction, the guide bevel guides the protrusion to make the second gear relatively away from the first gear.

The following will describe the embodiments of the present invention with reference to the drawings. For the sake of clarity, many practical details will be described together in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly known structures and components will be shown in the drawings in a simple schematic manner; and repeated components may be represented by the same number or similar number.

In addition, in this article, when a certain element (or mechanism or module, etc.) is "connected", "set" or "coupled" to another element, it may mean that the element is directly connected, directly set or directly coupled to another element, or it may mean that a certain element is indirectly connected, indirectly set or indirectly coupled to another element, that is, there are other elements between the element and the other element. When it is clearly stated that a certain element is "directly connected", "directly set" or "directly coupled" to another element, it means that there are no other elements between the element and the other element. The terms first, second, third, etc. are only used to describe different elements or components, and do not limit the elements/components themselves. Therefore, the first element/component can also be renamed as the second element/component. Furthermore, the combination of components/ingredients/mechanisms/modules in this article is not a generally known, conventional or common combination in this field, and whether the components/ingredients/mechanisms/modules themselves are common knowledge cannot be used to determine whether their combination relationship can be easily completed by a person of ordinary skill in the technical field.

Please refer to Figures 1, 2 and 3, wherein Figure 1 is a partial three-dimensional schematic diagram of a wheelchair 100 according to an embodiment of the present invention, Figure 2 is a partial exploded schematic diagram of the wheelchair 100 of the embodiment of Figure 1, and Figure 3 is another partial exploded schematic diagram of the wheelchair 100 of the embodiment of Figure 1. The wheelchair 100 includes a chair frame 1000, a first driving member 2000, a second driving member 3000, a transmission clutch mechanism 4000 and a wheel 5000.

The first driving member 2000 is movably disposed on the chair frame 1000. The second driving member 3000 is movably disposed on the chair frame 1000. The transmission clutch mechanism 4000 is movably disposed on the chair frame 1000 and includes a first transmission gear 4100, a second transmission gear 4200 and a clutch gear set 4300. The first transmission gear 4100 is driven by the first driving member 2000, and the second transmission gear 4200 is driven by the second driving member 3000.

The clutch gear set 4300 is operably coupled to the first transmission gear 4100 and the second transmission gear 4200 and includes a clutch transmission gear 4330, a first gear 4310, a second gear 4320 and a rotating plate 4340. The clutch transmission gear 4330 has an axis I1 and is engaged with the second transmission gear 4200. The first gear 4310 is disposed on one side of the clutch transmission gear 4330 along the axis I1 and includes a plurality of first side gears 4311 (marked in FIG. 4) and a plurality of first face gears 4312 (marked in FIG. 4). The first gear 4310 is engaged with the first transmission gear 4100 through the plurality of first side gears 4311. The second gear 4320 faces the first gear 4310 along the axis I1 and includes a plurality of second side gears 4321 (marked in FIG. 4) and a plurality of second face gears 4322 (marked in FIG. 5). The plurality of second face gears 4322 are used to selectively engage with the plurality of first face gears 4312. The rotating disc 4340 is sandwiched between the first gear 4310 and the second gear 4320 and is rotationally limited with the clutch transmission gear 4330.

The wheel 5000 is pivoted on the chair frame 1000 and is linked to the second gear 4320. The second gear 4320 is positioned at a first position or a second position. When the second gear 4320 is at the first position, the plurality of second face gears 4322 are engaged with the plurality of first face gears 4312. When the first drive member 2000 drives the first transmission gear 4100 to rotate the first gear 4310 in a first direction R1 (indicated in FIG. 4), the first gear 4310 drives the second gear 4320 to allow the wheel 5000 to rotate in a second direction R2 (indicated in FIG. 4). When the second drive member 3000 drives the second transmission gear 4200 to rotate the clutch transmission gear 4330 in the first direction R1, the turntable 4340 pushes the second gear 4320, so that the second gear 4320 links the first gear 4310 to allow the wheel 5000 to rotate in the second direction R2; when the second driving member 3000 drives the second transmission gear 4200 to make the clutch transmission gear 4330 rotate in the second direction R2, the turntable 4340 pushes the second gear 4320 to move to the second position relative to the first gear 4310 on the axis I1 to separate the aforementioned plurality of second face gears 4322 and the aforementioned plurality of first face gears 4312, and the turntable 4340 drives the second gear 4320 to allow the wheel 5000 to rotate in the first direction R1 without being restricted by the first gear 4310.

Thus, through the configuration of the clutch gear set 4300, the first gear 4310 and the second gear 4320 can be linked in the first direction R1, but not in the second direction R2, thereby increasing the flexibility of the transmission configuration.

It should be particularly noted that the wheelchair 100 in Figures 1 and 2 only shows components on one side, but the wheelchair 100 actually includes wheels 5000 and components on two sides, and the wheelchair 100 may further include a seat (not shown), a backrest (not shown) and a footrest (not shown), etc., and is not limited by the figures.

Please refer to Figures 4 and 5, and refer to Figures 2 to 3 together, wherein Figure 4 shows an exploded schematic diagram of the clutch gear set 4300 of the wheelchair 100 of the embodiment of Figure 1, and Figure 5 shows another exploded schematic diagram of the clutch gear set 4300 of the wheelchair 100 of the embodiment of Figure 1. The clutch gear set 4300 includes a clutch transmission gear 4330, a first gear 4310, a rotating disc 4340, and a second gear 4320 from the bottom to the top of Figure 4. The diameter of the clutch transmission gear 4330 is larger than the diameters of the first gear 4310 and the second gear 4320, and the diameters of the first gear 4310 and the second gear 4320 are the same.

The clutch transmission gear 4330 may include a connecting shaft 4331 and two engaging grooves 4332. The connecting shaft 4331 protrudes toward the first gear 4310 and is provided for the first gear 4310, the rotating plate 4340 and the second gear 4320 to be sleeved. The two engaging grooves 4332 are recessed in the connecting shaft 4331. The rotating plate 4340 includes two engaging protrusions 4344. The two engaging protrusions 4344 are respectively engaged with the two engaging grooves 4332. Specifically, the interior of the connecting shaft 4331 may be hollow and the first pivot 1100 on the chair frame 1000 may be inserted therein to fix the position of the clutch transmission gear 4330. Afterwards, the first gear 4310, the rotating disk 4340 and the second gear 4320 are sequentially sleeved on the connecting shaft 4331, so that the engaging protrusion 4344 of the rotating disk 4340 can be engaged with the engaging groove 4332 and rotated in conjunction with the clutch transmission gear 4330. In addition, the first face gear 4312 of the first gear 4310 and the second face gear 4322 of the second gear 4320 can be opposite to each other, so that when the second gear 4320 is located at the first position, the first face gear 4312 and the second face gear 4322 can be engaged.

The first gear 4310 may further include a first gear body 4313 and a first groove 4314, wherein the first groove 4314 is recessed in the first gear body 4313, the plurality of first side teeth 4311 are disposed around a side edge of the first gear body 4313, and the plurality of first face teeth 4312 protrude along the axis I1 and surround the first groove 4314; the second gear 4320 may further include a second gear body 4313 and a first groove 4314, wherein the first side teeth 4311 are disposed around a side edge of the first gear body 4313, and the plurality of first face teeth 4312 protrude along the axis I1 and surround the first groove 4314. 323 and a second groove 4324, the second groove 4324 is recessed in the second gear body 4323 and faces the first groove 4314, the plurality of second side teeth 4321 are arranged around a side edge of the second gear body 4323, the plurality of second face teeth 4322 protrude along the axis I1 and surround the second groove 4324, and the rotating disk 4340 is accommodated in the first groove 4314 and protrudes into the second groove 4324. The first side gear 4311 radially extends outward from the side edge of the first gear body 4313, and the first face gear 4312 extends from the first gear body 4313 along the axis I1 toward the second gear 4320 and is closer to the second gear 4320 on the axis I1 than the first side gear 4311. The turntable 4340 can be placed on the bottom surface of the first groove 4314. The second side gear 4321 radially extends outward from the side edge of the second gear body 4323, and the second face gear 4322 extends from the second gear body 4323 along the axis I1 toward the first gear 4310 and is closer to the first gear 4310 on the axis I1 than the second side gear 4321.

When the first gear 4310 and the second gear 4320 are sleeved on the connecting shaft 4331, the rotating disc 4340 is hidden in the first gear 4310 and the second gear 4320, and when the second gear 4320 is located at the first position, the rotating disc 4340 does not affect the engagement of the first face gear 4312 and the second face gear 4322.

Furthermore, the rotating disk 4340 may include a disk body 4341, a guide ramp 4342 and a driving portion 4343. The guide ramp 4342 protrudes from the disk body 4341 toward the second gear 4320 and includes a top (not shown). The driving portion 4343 is protruded from the top of the guide ramp 4342. The second gear 4320 may further include a protrusion 4325, which protrudes from a bottom surface of the second groove 4324 toward the first groove 4314. When the clutch transmission gear 4330 is driven to rotate in the first direction R1, the guide bevel block 4342 pushes the protrusion 4325, and when the clutch transmission gear 4330 is driven to rotate in the second direction R2, the guide bevel block 4342 guides the protrusion 4325 to make the second gear 4320 relatively away from the first gear 4310 along the axis I1 to switch to the second position.

The disk body 4341 is generally disk-shaped and includes a center hole (not shown), and the engaging protrusion 4344 protrudes from the hole wall of the center hole into the center hole. The number of the guide bevel blocks 4342 can be three and arranged around the center hole on the surface of the disk body 4341. The guide bevel block 4342 has a bevel and an end face, and the bevel and the end face are connected to the top face. When the turntable 4340 rotates in the second direction R2, the protrusion 4325 can rise along the bevel of the guide bevel block 4342, so that the second gear 4320 can be away from the first gear 4310. The number of the driving parts 4343 is three, and each driving part 4343 is integrally connected to the top of each guide bevel block 4342. Therefore, when the protrusion 4325 rises to a certain distance, it stops rising and the driving part 4343 pushes the protrusion 4325 to rotate the second gear 4320 in the second direction R2. On the contrary, when the clutch transmission gear 4330 rotates in the first direction R1, the rotating disk 4340 rotates in the first direction R1 through the engagement relationship between the engagement protrusion 4344 and the engagement groove 4332, and the guide bevel 4342 rotates to make the protrusion 4325 descend along the inclined surface of the guide bevel 4342, and the second gear 4320 can return to the first position. Afterwards, the guide bevel 4342 and the driving part 4343 can rotate a distance to contact another adjacent protrusion 4325, and can push the protrusion 4325 to link the second gear 4320 to rotate in the first direction R1. As shown in FIG. 3, the clutch gear set 4300 can further include a spring 4350, and the spring 4350 can press against the second gear 4320 along the axis I1, and after the external force disappears, the second gear 4320 can return to the first position from the second position, and can strengthen the engagement relationship between the first face gear 4312 and the second face gear 4322.

Please refer to FIG. 6, together with FIG. 2 and FIG. 3, wherein FIG. 6 shows an exploded schematic diagram of a first one-way gear set 4400 and a second one-way gear set 4500 of the embodiment of FIG. 1. As shown in FIG. 2 and FIG. 3, the first transmission gear 4100 can be pivoted on the second pivot 1200 on the chair frame 1000 to engage with the clutch transmission gear 4330. The transmission clutch mechanism 4000 can further include a first one-way gear set 4400 and a second one-way gear set 4500. The first one-way gear set 4400 includes a first driving wheel 4410 and a first linkage wheel 4420. The first driving wheel 4410 is driven by the first driving member 2000, the first linkage wheel 4420 is overlapped on the first driving wheel 4410 and linked with the first driving wheel 4410 in the first direction R1, and the first linkage wheel 4420 is engaged with the first transmission gear 4100. The second one-way gear set 4500 includes a second driving wheel 4510 and a second linkage wheel 4520. The second driving wheel 4510 is engaged with the first driving wheel 4410, the second linkage wheel 4520 is overlapped on the second driving wheel 4510 and linked with the second driving wheel 4510 in the first direction R1, and the second linkage wheel 4520 is engaged with the first transmission gear 4100.

The first one-way gear set 4400 may further include a first pawl 4430, which is movably connected to the first linkage wheel 4420. The first driving wheel 4410 includes a plurality of first ratchets 4411 that engage with the first pawl 4430 in the first direction R1 and separate from the first pawl 4430 in the second direction R2. The second one-way gear set 4500 further includes a second pawl 4530, which is movably connected to the second linkage wheel 4520. The second driving wheel 4510 includes a plurality of second ratchets 4511 that engage with the second pawl 4530 in the first direction R1 and separate from the second direction R2.

Specifically, the first driving wheel 4410 and the first linkage wheel 4420 are sequentially stacked on the third pivot 1300, so that the first linkage wheel 4420 is engaged with the first transmission gear 4100. The first driving wheel 4410 includes a first inner groove (not shown), and the plurality of first ratchets 4411 can be disposed on the groove wall of the first inner groove. The number of first pawls 4430 is four, and each first pawl 4430 can include a first rotating shaft 4431, a first swing arm 4432 and a first spring arm 4433, each first swing arm 4432 is connected to each first rotating shaft 4431, and each first spring arm 4433 is connected to each first swing arm 4432 to form a V-shaped structure with each first swing arm 4432. The first linkage wheel 4420 may include four first pivot holes 4421 and four first pivot areas 4422 , and each first pivot area 4422 is adjacent to each first pivot hole 4421 . Each first rotation axis 4431 is pivoted in each first pivot hole 4421 , and each first swing arm 4432 and each first elastic arm 4433 are located in each first pivot area 4422 . When the first driving wheel 4410 rotates in the second direction R2, the first ratchet 4411 pushes the first swing arm 4432, and the first spring arm 4433 deflects to separate the first pawl 4430 from the first ratchet 4411, so that the first linkage wheel 4420 cannot be driven; conversely, when the first driving wheel 4410 rotates in the first direction R1, the first ratchet 4411 pushes the first swing arm 4432 to link the first linkage wheel 4420 to rotate in the first direction R1, so that the first transmission gear 4100 rotates in the second direction R2.

Similarly, the second driving wheel 4510 and the second interlocking wheel 4520 are sequentially stacked on the fourth pivot 1400, so that the second driving wheel 4510 is engaged with the first driving wheel 4410, and the second interlocking wheel 4520 is engaged with the first transmission gear 4100. The second driving wheel 4510 includes a second inner groove (not shown), and the plurality of second ratchets 4511 can be disposed on the groove wall of the second inner groove. The number of the second pawls 4530 is four, and each second pawl 4530 may include a second rotating shaft 4531, a second swing arm 4532, and a second elastic arm 4533. Each second swing arm 4532 is connected to each second rotating shaft 4531, and each second elastic arm 4533 is connected to each second swing arm 4532 to form a V-shaped structure with each second swing arm 4532. The second linkage wheel 4520 may include four second pivot holes 4521 and four second pivot areas 4522. Each second pivot area 4522 is adjacent to each second pivot hole 4521. Each second rotation axis 4531 is pivoted in each second pivot hole 4521 , and each second swing arm 4532 and each second elastic arm 4533 are located in each second pivot area 4522 . When the first driving wheel 4410 rotates in the first direction R1, the second driving wheel 4510 is linked to rotate in the second direction R2, the second ratchet 4511 pushes the second swing arm 4532, and the second spring arm 4533 is deflected to separate the second pawl 4530 from the second ratchet 4511, so the second linkage wheel 4520 cannot be driven; conversely, when the first driving wheel 4410 rotates in the second direction R2, the second driving wheel 4510 is linked to rotate in the first direction R1, the second ratchet 4511 pushes the second swing arm 4532 to link the second linkage wheel 4520 to rotate in the first direction R1, so that the first transmission gear 4100 rotates in the second direction R2.

The first driving member 2000 may have a push rod structure and include a plurality of push rod teeth 2200, and the plurality of push rod teeth 2200 drive the first transmission gear 4100. Specifically, the first driving member 2000 may further include a rod portion 2100, and the plurality of push rod teeth 2200 are disposed at one end of the rod portion 2100 and engage the first driving wheel 4410 of the first one-way gear set 4400. Through the structural configuration of the first one-way gear set 4400, the second one-way gear set 4500 and the first transmission gear 4100, when the first driving member 2000 is driven in the first direction R1, the second one-way gear set 4500 drives the first transmission gear 4100 to rotate in the second direction R2; when the first driving member 2000 is driven in the second direction R2, the first one-way gear set 4400 drives the first transmission gear 4100 to rotate in the second direction R2, thereby achieving the effect of driving the first transmission gear 4100 to rotate in the second direction R2 by pushing or pulling the first driving member 2000.

Please refer to FIG. 7, together with FIGS. 2 to 6, wherein FIG. 7 is a three-dimensional schematic diagram of a portion of the transmission clutch mechanism 4000 of the wheelchair 100 of the embodiment of FIG. 1. The transmission clutch mechanism 4000 may further include an axle 4600, a wheel bushing 4700, and a wheel gear 4800. One end of the axle 4600 is provided for the second transmission gear 4200 to be mounted and is rotationally connected with the second transmission gear 4200, and the other end is connected to the second drive member 3000. The wheel bushing 4700 is mounted on the axle 4600 and is located between the second drive member 3000 and the second transmission gear 4200. The wheel gear 4800 is sleeved on the wheel sleeve 4700 and is rotationally linked with the wheel sleeve 4700. The wheel gear 4800 is engaged with the second gear 4320. The second driving member 3000 may have a rotating wheel structure, and the second driving member 3000 drives the shaft 4600 to rotate in linkage with the second transmission gear 4200.

As shown in FIG. 2, FIG. 3 and FIG. 7, one end of the shaft 4600 includes a hexagonal nut, the shape of which matches the hole of the second driving member 3000, so that the second driving member 3000 can drive the shaft 4600 to rotate when the second driving member 3000 rotates. The other end of the shaft 4600 is inserted into the chair frame 1000 and matches the hole of the second transmission gear 4200 in a concave-convex manner, so that the second transmission gear 4200 can be linked to the shaft 4600. The wheel sleeve 4700 is sleeved on the shaft 4600 and is non-rotatably connected to the shaft 4600. One end of the wheel sleeve 4700 can be concavely matched with the hole of the wheel gear 4800. The other end of the wheel sleeve 4700 can include a hexagonal nut, the shape of which matches the hole of the wheel 5000, so that the wheel 5000 is connected with the wheel gear 4800. In terms of structural configuration, the second transmission gear 4200, the wheel gear 4800, the wheel 5000 and the second drive member 3000 are arranged on the shaft 4600 in sequence.

As shown in Figures 2 to 7, when the second gear 4320 in the clutch gear set 4300 is located in the first position, the user rotates the first driving member 2000 in the first direction R1, and the second one-way gear set 4500 drives the first transmission gear 4100 to rotate in the second direction R2, and the first gear 4310 is driven to rotate in the first direction R1. Based on the engagement relationship between the first face gear 4312 and the second face gear 4322, the second gear 4320 also rotates in the first direction R1, driving the wheel gear 4800 and the wheel 5000 to rotate in the second direction R2, so that the wheelchair 100 moves forward. If the user rotates the first driving member 2000 toward the second direction R2, the first one-way gear set 4400 will drive the first transmission gear 4100 to rotate toward the second direction R2, and finally the wheel 5000 will also rotate toward the second direction R2, so that the wheelchair 100 moves forward. In other words, no matter which direction the first driving member 2000 rotates, the wheel 5000 can move forward, which is different from the conventional lever-type driving wheelchair, which can only move forward by operating the lever in one direction.

Furthermore, when the second gear 4320 in the clutch gear set 4300 is still in the first position, if the user rotates the second driving member 3000 in the second direction R2, the second transmission gear 4200 can be driven to rotate in the second direction R2, and the clutch transmission gear 4330 can be linked to rotate in the first direction R1. At this time, the rotating plate 4340 is linked to drive the end surface of the driving portion 4343 and the guide ramp 4342 to push the protrusion 4325, and the second gear 4320 can be linked to rotate in the first direction R1. Based on the engagement relationship between the first face gear 4312 and the second face gear 4322, the first gear 4310 will also be pushed to the first direction R1. When a gear 4310 rotates in the first direction R1, it will drive the first transmission gear 4100 to rotate in the second direction R2, so as to push the first linkage wheel 4420 and the second linkage wheel 4520 in the first direction R1, and drive the first pawl 4430 and the second pawl 4530 to disengage from the first ratchet 4411 and the second ratchet 4511 respectively. Therefore, the first gear 4310 is allowed to cooperate with the second gear 4320 to rotate in the first direction R1, and the rotation of the second gear 4320 in the first direction R1 is not blocked. In this way, the wheel gear 4800 and the wheel 5000 can be driven to rotate in the second direction R2, so that the wheelchair 100 can move forward.

Please refer to FIG. 8 and FIG. 2 to FIG. 7 together, wherein FIG. 8 is another partial three-dimensional schematic diagram of the transmission clutch mechanism 4000 of the wheelchair 100 of the embodiment of FIG. 1. If the user rotates the second driving member 3000 toward the first direction R1, the second transmission gear 4200 can be driven to rotate toward the first direction R1, and the clutch transmission gear 4330 can be linked to rotate toward the second direction R2. At this time, the rotating disk 4340 is linked, and the inclined surface of the guiding inclined block 4342 touches the protrusion 4325, generating a force to drive the second gear 4320 to rotate toward the second direction R2. Based on the engagement relationship between the first face gear 4312 and the second face gear 4322, the first gear 4310 will also be pushed to the second direction R2. When the first gear 4310 rotates in the second direction R2, it will link the first transmission gear 4100 to rotate in the first direction R1, so as to push the first linkage wheel 4420 and the second linkage wheel 4520 to the second direction R2. However, the first pawl 4430 and the second pawl 4530 will jam the first ratchet 4411 and the second ratchet 4511 in the second direction R2 and cannot rotate. Therefore, the first gear 4310 cannot cooperate with the second gear 4320 to rotate in the second direction R2. In this case, the first gear 4310 will limit the second gear 4320 from rotating in the second direction R2, so as shown in FIG. 8 , the second gear 4320 will be guided and pushed upward by the inclined surface of the guide ramp 4342, so that the second gear 4320 moves upward to the second position, causing the second face gear 4322 to disengage from the first face gear 4312. Therefore, the second gear 4320 is not limited by the first gear 4310, but is driven by the driving part 4343 of the turntable 4340 to rotate in the second direction R2, so that the linked wheel gear 4800 and the wheel 5000 rotate in the first direction R1, so that the wheelchair 100 moves backward.

When the wheel 5000 rotates in the second direction R2 and moves forward on an uphill section, if the wheelchair 100 slips, gravity will push the wheel 5000 in the first direction R1, and the second gear 4320 will be linked to rotate in the second direction R2. As mentioned above, the rotation of the second gear 4320 in the second direction R2 will encounter resistance from the first pawl 4430, the first ratchet 4411, the second pawl 4530 and the second ratchet 4511, so the second gear 4320 cannot rotate in the first direction R1, thereby avoiding the risk of the wheelchair 100 sliding downhill.

From the above embodiments, it can be seen that the clutch gear set and transmission clutch mechanism of the present invention include a first gear and a second gear which can be linked in a first direction and do not affect each other in a second direction, and can have a clutch effect. In combination with the clutch transmission gear, a variety of drive sources can be configured to achieve different transmission purposes. Although the above embodiments are described with a wheelchair, in other embodiments, the clutch gear set and transmission clutch mechanism can also be applied to other machines or mobile vehicles, etc., and are not limited thereto. In addition, after the clutch gear set, the transmission clutch mechanism, the first drive member and the second drive member are configured, the first drive member and the second drive member can be used to achieve the effect of moving the wheelchair forward, and the second drive member can be used to move the wheelchair backward without configuring a switch button, which is more convenient to use.

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined in the attached patent application.

100: wheelchair 1000: chair frame 1100: first pivot 1200: second pivot 1300: third pivot 1400: fourth pivot 2000: first drive member 2100: rod 2200: push rod gear 3000: second drive member 4000: transmission clutch mechanism 4100: first transmission gear 4200: second transmission gear 4300: clutch gear set 4310: first gear 4311: first side gear 4312: first face gear 4313: first gear body 4314: first groove 4320: Second gear 4321: Second side gear 4322: Second face gear 4323: Second gear body 4324: Second groove 4325: Protrusion 4330: Clutch transmission gear 4331: Connecting shaft 4332: Engagement groove 4340: Turntable 4341: Disk body 4342: Guide ramp 4343: Driving part 4344: Engagement protrusion 4350: Spring 4400: First one-way gear set 4410: First drive wheel 4411: First ratchet 4420: First linkage wheel 4421: First pivot hole 4422: First pivot 4430: First pawl 4431: First shaft 4432: First swing arm 4433: First spring arm 4500: Second one-way gear set 4510: Second drive wheel 4511: Second ratchet 4520: Second linkage wheel 4521: Second pivot 4522: Second pivot 4530: Second pawl 4531: Second shaft 4532: Second swing arm 4533: Second spring arm 4600: Axle 4700: Wheel bushing 4800: Wheel gear 5000: Wheel I1: Axis R1: First direction R2: Second direction

FIG. 1 is a partial three-dimensional schematic diagram of a wheelchair according to an embodiment of the present invention; FIG. 2 is a partial exploded schematic diagram of the wheelchair of the embodiment of FIG. 1; FIG. 3 is another partial exploded schematic diagram of the wheelchair of the embodiment of FIG. 1; FIG. 4 is an exploded schematic diagram of a clutch gear set of the wheelchair of the embodiment of FIG. 1; FIG. 5 is another exploded schematic diagram of the clutch gear set of the wheelchair of the embodiment of FIG. 1; FIG. 6 is an exploded schematic diagram of a first one-way gear set and a second one-way gear set of the embodiment of FIG. 1; FIG. 7 is a three-dimensional schematic diagram of a portion of a transmission clutch mechanism of the wheelchair of the embodiment of FIG. 1; FIG. 8 is another partial three-dimensional schematic diagram of the transmission clutch mechanism of the wheelchair of the embodiment of FIG. 1.

1100: First axis

1200: Second axis

1300: Third axis

1400: Fourth Axis

2000: First drive parts

2100: Rod

2200:Putter teeth

4000: Transmission clutch mechanism

4100: First transmission gear

4200: Second transmission gear

4300: Clutch gear set

4310: First gear

4320: Second gear

4330: Clutch transmission gear

4340:Turntable

4350: Spring

4410: First drive wheel

4411: First thorn

4420: First linkage wheel

4430: First pawl

4510: Second drive wheel

4511: Second thorn tooth

4520: Second linkage wheel

4530: Second pawl

4600: Axis

4700: Wheel Bushing

4800: Wheel gear

I1: axis

Claims (15)

A clutch gear set comprises: A clutch transmission gear having an axis; A first gear disposed on one side of the clutch transmission gear along the axis and comprising a plurality of first side teeth and a plurality of first face teeth; A second gear facing the first gear along the axis and comprising a plurality of second side teeth and a plurality of second face teeth, wherein the second face teeth are used to selectively engage with the first face teeth; and A rotating disk sandwiched between the first gear and the second gear and rotationally limited with the clutch transmission gear: When the second gear is in a first position, the second face teeth are engaged with the first face teeth. When the clutch transmission gear is driven to rotate in a first direction, the rotating disk pushes the second gear, so that the second gear links the first gear to rotate in the first direction. When the clutch transmission gear is driven to rotate in a second direction, the rotating disk pushes the second gear to move to a second position relative to the first gear on the axis to separate the second face teeth and the first face teeth, and the rotating disk drives the second gear to rotate in the second direction without being restricted by the first gear. A clutch gear set as described in claim 1, wherein the first gear further includes a first gear body and a first groove, the first groove is recessed in the first gear body, the first side gear rings are disposed on a side edge of the first gear body, the first face teeth protrude along the axis and surround the first groove; the second gear further includes a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the second side gear rings are disposed on a side edge of the second gear body, the second face teeth protrude along the axis and surround the second groove, and the turntable is disposed in the first groove and protrudes into the second groove. A clutch gear set as described in claim 2, wherein the rotating disk includes a disk body, a guide bevel and a driving portion, the guide bevel protrudes from the disk body toward the second gear and includes a top, the driving portion is protruded from the top of the guide bevel, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in the first direction, the guide bevel pushes the protrusion, and when the clutch transmission gear is driven to rotate in the second direction, the guide bevel guides the protrusion so that the second gear is relatively away from the first gear. A clutch gear set as described in claim 1, wherein the clutch transmission gear includes a connecting shaft and two engaging grooves, the connecting shaft protrudes toward the first gear and is provided with the first gear, the rotating plate and the second gear sleeve, the two engaging grooves are recessed in the connecting shaft, and the rotating plate includes two engaging protrusions, and the two engaging protrusions are respectively engaged with the two engaging grooves. A transmission clutch mechanism comprises: a first transmission gear; a second transmission gear; and a clutch gear set operably coupled to the first transmission gear and the second transmission gear and comprising; a clutch transmission gear having an axis and engaging with the second transmission gear; a first gear disposed on one side of the clutch transmission gear along the axis and comprising a plurality of first side teeth and a plurality of first face teeth, the first gear engaging with the first transmission gear through the first side teeth; A second gear, facing the first gear along the axis and comprising a plurality of second side teeth and a plurality of second face teeth, the second face teeth being used to selectively engage with the first face teeth; and A rotating disk, sandwiched between the first gear and the second gear and rotationally limited with the clutch transmission gear: The second gear is positioned at a first position or a second position. When the second gear is at the first position, the second face gears are engaged with the first face gears. When the first gear is driven by the first transmission gear to rotate in a first direction, the first gear drives the second gear to rotate in the first direction. When the clutch transmission gear is driven by the second transmission gear to rotate in the first direction, the turntable pushes The second gear drives the first gear to rotate in the first direction; when the clutch transmission gear is driven by the second transmission gear to rotate in the second direction, the turntable pushes the second gear to move to the second position relative to the first gear on the axis to separate the second face teeth and the first face teeth, and the turntable drives the second gear to rotate in the second direction without being restricted by the first gear. The transmission clutch mechanism as described in claim 5 further comprises: A first one-way gear set, comprising: A first driving wheel, driven by a first driving member; and A first connecting wheel, superimposed on the first driving wheel and linked with the first driving wheel in the first direction, the first connecting wheel meshing with the first transmission gear; and A second one-way gear set, comprising: A second driving wheel, meshing with the first driving wheel; and A second connecting wheel, superimposed on the second driving wheel and linked with the second driving wheel in the first direction, the second connecting wheel meshing with the first transmission gear. A transmission clutch mechanism as described in claim 6, wherein the first one-way gear set further includes a first pawl, which is movably connected to the first connecting wheel, and the first driving wheel includes a plurality of first ratchets that engage with the first pawl in the first direction and separate in the second direction; the second one-way gear set further includes a second pawl, which is movably connected to the second connecting wheel, and the second driving wheel includes a plurality of second ratchets that engage with the second pawl in the first direction and separate in the second direction. A transmission clutch mechanism as described in claim 6, wherein the first gear further includes a first gear body and a first groove, the first groove is recessed in the first gear body, the first side gear rings are disposed on a side edge of the first gear body, the first face teeth protrude along the axis and surround the first groove; the second gear further includes a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the second side gear rings are disposed on a side edge of the second gear body, the second face teeth protrude along the axis and surround the second groove, and the turntable is disposed in the first groove and protrudes into the second groove. A transmission clutch mechanism as described in claim 8, wherein the turntable includes a disc body, a guide bevel and a driving portion, the guide bevel protrudes from the disc body toward the second gear and includes a top portion, the driving portion is protruded from the top portion of the guide bevel, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in the first direction, the guide bevel pushes the protrusion, and when the clutch transmission gear is driven to rotate in the second direction, the guide bevel guides the protrusion so that the second gear is relatively away from the first gear. A wheelchair comprises: a chair frame; a first driving member movably disposed on the chair frame; a second driving member movably disposed on the chair frame; a transmission clutch mechanism movably disposed on the chair frame and comprising: a first transmission gear driven by the first driving member; a second transmission gear driven by the second driving member; and a clutch gear set operably coupled to the first transmission gear and the second transmission gear and comprising; a clutch transmission gear having an axis and engaged with the second transmission gear; A first gear, arranged on one side of the clutch transmission gear along the axis and including a plurality of first side teeth and a plurality of first face teeth, the first gear is engaged with the first transmission gear through the first side teeth; A second gear, facing the first gear along the axis and including a plurality of second side teeth and a plurality of second face teeth, the second face teeth are used to selectively engage with the first face teeth; and A rotating disk, sandwiched between the first gear and the second gear and limited in rotation with the clutch transmission gear; and A wheel, pivoted on the chair frame and linked to the second gear; The second gear is positioned at a first position or a second position. When the second gear is at the first position, the second face gears are engaged with the first face gears. When the first driving member drives the first transmission gear to rotate the first gear in a first direction, the first gear links the second gear to allow the wheel to rotate in a second direction. When the second driving member drives the second transmission gear to rotate the clutch transmission gear in the first direction, the turntable pushes the second transmission gear to rotate the clutch transmission gear in the first direction. The second gear links the first gear to allow the wheel to rotate in the second direction; when the second driving member drives the second transmission gear to rotate the clutch transmission gear in the second direction, the turntable pushes the second gear to move to the second position relative to the first gear on the axis to separate the second face teeth and the first face teeth, and the turntable drives the second gear to allow the wheel to rotate in the first direction without being restricted by the first gear. The wheelchair as described in claim 10, wherein the transmission clutch mechanism further comprises: an axle, one end of which is provided for the second transmission gear to be sleeved and rotationally connected to the second transmission gear, and the other end of which is connected to the second drive member; a wheel shaft sleeve, sleeved on the axle and located between the second drive member and the second transmission gear; and a wheel gear, sleeved on the wheel shaft sleeve and rotationally connected to the wheel shaft sleeve, and the wheel gear is engaged with the second gear. A wheelchair as described in claim 11, wherein the second driving member has a rotating wheel structure, and the second driving member drives the axle to rotate in conjunction with the second transmission gear. A wheelchair as described in claim 10, wherein the first driving member has a push rod structure and includes a plurality of push rod teeth, and the push rod teeth drive the first transmission gear. A wheelchair as described in claim 10, wherein the first gear further comprises a first gear body and a first groove, the first groove is recessed in the first gear body, the first side gear rings are disposed on a side edge of the first gear body, the first face teeth protrude along the axis and surround the first groove; the second gear further comprises a second gear body and a second groove, the second groove is recessed in the second gear body and faces the first groove, the second side gear rings are disposed on a side edge of the second gear body, the second face teeth protrude along the axis and surround the second groove, and the turntable is disposed in the first groove and protrudes into the second groove. A wheelchair as described in claim 14, wherein the turntable includes a disc body, a guide bevel and a driving portion, the guide bevel protrudes from the disc body toward the second gear and includes a top portion, the driving portion is protruded from the top portion of the guide bevel, and the second gear further includes a protrusion, which protrudes from a bottom surface of the second groove toward the first groove; when the clutch transmission gear is driven to rotate in the first direction, the guide bevel pushes the protrusion, and when the clutch transmission gear is driven to rotate in the second direction, the guide bevel guides the protrusion so that the second gear is relatively away from the first gear.

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