CN210003792U

CN210003792U - center wheel fixed type automatic gear shifting transmission

Info

Publication number: CN210003792U
Application number: CN201920735031.XU
Authority: CN
Inventors: 黄英可
Original assignee: Zhangjiagang Chuansuo Vehicle Industry Co Ltd
Current assignee: Zhangjiagang Chuansuo Vehicle Industry Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2020-01-31
Anticipated expiration: 2029-05-22

Abstract

The utility model discloses an fixed automatic gear shifting transmissions of centre wheel, including center pin, power input piece, planetary transmission and automatic centrifugal gearshift, planetary transmission includes ring gear, centre wheel, planet carrier and planet wheel, automatic centrifugal gearshift includes pawl spare frame, ratchet, at least pawl spare, connecting piece, elastic component, second elastic component, linkage and two at least centrifugal pieces, be connected through the connecting piece between centrifugal piece and the linkage, be equipped with the draw-in groove with pawl spare matched with on the linkage, the draw-in groove can release or accept the pawl spare when the linkage rotates, be equipped with freewheel clutch between power input piece and the ring gear, the utility model discloses an automatic centrifugal gearshift that set had linkage and centrifugal piece in the derailleur to can realize the variable speed.

Description

center wheel fixed type automatic gear shifting transmission

[ technical field ] A method for producing a semiconductor device

The utility model relates to a bicycle technical field, concretely relates to fixed automatic gearshift derailleur of centre wheel.

[ background of the invention ]

The bicycle speed changer is divided into an inner speed changer and an outer speed changer, the outer speed changer adopts an open chain mechanism as a transmission system, a chain is changed to different flywheels by shifting a gear shifter arranged in front of a bicycle to realize different chain transmission ratios, the outer speed changer is exposed outside, so the outer speed changer is easy to rust and easy to be interfered by external force, regular maintenance is often needed, the inner speed changer mainly adopts a planetary gear mechanism as a transmission main body and is sealed inside a ratchet sleeve, and the inner speed changer is protected by multiple layers of special sealing materials, so rainwater, dust, oil dirt and the like cannot enter, the regular maintenance is not needed, and the advantage of no maintenance is realized. The following disadvantages are common to prior art internal transmissions: 1. manual gear shifting is needed, and automatic gear shifting cannot be realized; 2. when the internal transmission is shifted into high gear, the kick frequency, if reduced, makes it difficult to maintain the transmission in high gear.

Therefore, it is necessary to provide center wheel fixed type automatic shifting transmissions that solve the above-mentioned technical problems.

[ Utility model ] content

In order to solve the above problems, an object of the present invention is to provide center wheel fixed automatic transmission with reduced frequency requirement.

In order to achieve the purpose, the technical scheme adopted by the utility model is that central wheel fixed automatic gear shifting transmissions comprise a central shaft, a power input piece and a speed change mechanism arranged between the central shaft and the power input piece, wherein the speed change mechanism comprises a planetary transmission and an automatic centrifugal gear shift mechanism, the planetary transmission comprises a gear ring, a central wheel, a planet carrier and a planet wheel, the central wheel is fixedly connected with a frame, the planet carrier is fixedly connected with the central shaft, the automatic centrifugal gear shift mechanism comprises a pawl rack, a ratchet wheel, at least pawl pieces, a connecting piece, a elastic piece, a second elastic piece, a linkage piece and at least two centrifugal blocks, the pawl rack is formed or fixedly connected with the planet carrier , the ratchet wheel is arranged on the inner circumferential surface of the power input piece, the pawl piece is arranged on the pawl rack and controls the initial position of the pawl rack through a elastic piece, the centrifugal blocks are arranged on the pawl rack and control the initial position of the pawl rack through the second elastic piece, the centrifugal blocks are connected with the linkage piece through the connecting piece, a clamping groove matched with the pawl piece is arranged on the linkage piece, and a clutch clamping groove is arranged between the gear ring gear and the power input piece or the linkage piece when the clutch.

Preferably, the center wheel fixed automatic transmission of the utility model is further steps set up that the freewheel clutch includes freewheel pawl and freewheel ratchet, the freewheel pawl elastic mounting is on power input piece, freewheel ratchet and ring gear body shaping or fixed connection, perhaps the freewheel pawl elastic mounting is on the ring gear, freewheel ratchet and power input piece body shaping or fixed connection.

Preferably, the step of the center wheel fixed automatic transmission of the present invention is that the th elastic member is an elastic steel wire, and the elastic steel wire is clamped on the pawl member so that the pawl member is elastically mounted on the pawl member frame.

Preferably, the steps of the center wheel fixed automatic transmission of the present invention are that the th elastic piece is a torsion spring, the pawl is mounted on the pawl frame through a positioning pin, and the torsion spring is sleeved on the positioning pin.

Preferably, the steps of the center wheel fixed automatic transmission are that the centrifugal block is mounted on the pawl frame through a positioning pin, and the second elastic piece is sleeved on the positioning pin.

Preferably, the steps of the center wheel fixed automatic transmission of the invention are that an end cover is arranged at the end of the power input part, and the end cover is connected with the center shaft through a bearing.

Preferably, the center wheel fixed automatic shifting transmissions of the utility model are further steps of arranging that a bearing seat is arranged on the central shaft, the bearing seat is connected with the central shaft through a bearing, the bearing seat is fixedly connected with the frame, and the center wheel is fixedly connected with the bearing seat.

Preferably, the center wheel fixed type automatic gear shifting transmission is further steps that the connecting piece is a linkage pin or a friction plate.

Preferably, the center wheel fixed automatic gear shifting transmissions of the utility model are further arranged in steps, the linkage piece is in a circular sheet shape, the outer circumferential surface of the clamping groove automatic linkage piece is concavely formed, and the outer side of the clamping groove is provided with a blocking part.

Compared with the prior art, the utility model has the following beneficial effects that the utility model provides a fixed automatic gear shifting transmission of centre wheel compact structure, simple to operate, high transmission efficiency, firm, the variable speed of shifting are stable, through set up sets of automatic centrifugal gearshift that has linkage and centrifugal piece in the derailleur, thereby can realize full-automatic variable speed, in addition the utility model provides a derailleur can reduce the requirement frequently of stepping on when high fender to make to ride more easily.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of the center wheel fixed automatic transmission of the present invention.

Fig. 2 is an exploded schematic view of the center wheel fixed automatic transmission of the present invention.

Fig. 3 is a schematic cross-sectional structural view of the center wheel fixed automatic transmission of the present invention.

Fig. 4 is a schematic structural diagram of the automatic centrifugal shift mechanism of the present invention.

In fig. 1 to 4: 1. the automatic transmission comprises a central shaft, 10, a bearing seat, 11, a bearing, 2, a power input part, 20, an end cover, 21, a bearing, 3, a planetary transmission, 30, a gear ring, 31, a central wheel, 32, a planet carrier, 33, a planet wheel, 4, an automatic centrifugal gear shifting mechanism, 40, a pawl carrier, 41, a ratchet wheel, 42, a pawl piece, 43, a connecting piece, 45, a second elastic piece, 46, a linkage piece, 460, a clamping groove, 461, a blocking part, 47, a centrifugal block, 470, a positioning pin, 5, an overrunning clutch, 50, an overrunning pawl, 51 and an overrunning ratchet wheel.

[ detailed description ] embodiments

The center wheel fixed automatic transmission of the present invention will be described in detail with reference to the following embodiments in which steps are performed.

Referring to fig. 1 to 4, center wheel fixed automatic gear shifting transmissions comprise a center shaft 1, a power input part 2 and a speed change mechanism arranged between the center shaft 1 and the power input part 2, wherein the speed change mechanism comprises a planetary transmission 3 and an automatic centrifugal gear shifting mechanism 4, the planetary transmission 3 comprises a gear ring 30, a center wheel 31, a planet carrier 32 and a planet wheel 33, the planet wheel 33 is respectively meshed with the gear ring 30 and the center wheel 31, the center wheel 31 is fixedly connected with a frame, and the planet carrier 32 is fixedly connected with the center shaft 1.

The automatic centrifugal gearshift 4 comprises a pawl frame 40, a ratchet 41, at least pawls 42, a connecting member 43, a -th elastic member (not shown), a second elastic member 45, a linkage member 46 and at least two centrifugal blocks 47, in this embodiment, the number of pawls 42 is two, the number of centrifugal blocks 47 is two, the pawl frame 40 is molded with a carrier 32 , in other embodiments, the number of pawls 42 and centrifugal blocks 47 may be more, the pawl frame 40 may be fixedly connected with a carrier 32, the invention may be implemented, in addition, the number of pawls 42 is , the invention may be implemented in that the ratchet 41 is disposed on an inner circumferential surface of a power input member 2, the pawl 42 is elastically mounted on the pawl frame 40, in this embodiment, the elastic member is an elastic wire which is caught in the pawl frame 42 so that the elastic member 42 is mounted on the pawl frame 40 for controlling an initial position of the pawl 42, the elastic member is mounted on a ratchet link frame 42, the elastic member frame may be disposed on a centrifugal block connecting member 60, the elastic member rack may be disposed on a centrifugal block connecting member 60, a centrifugal block connecting member 60 may be disposed on a centrifugal block connecting member 60, a centrifugal block connecting member 60, a centrifugal block 50 or a centrifugal block connecting member connecting pin according to a centrifugal block 30, a centrifugal block connecting structure according to a centrifugal block connecting structure, a centrifugal control system according to the invention, a practical embodiment of the invention, the invention may be used for controlling system, the invention may be used for controlling system of the invention, the invention may be used for controlling system according to the invention, the invention is provided with the invention, the invention is provided with the invention, the invention has the structure including the structure has the.

The end of power input member 2 is equipped with end cover 20, be connected through bearing 21 between end cover 20 and the center pin 1, be equipped with bearing frame 10 on the center pin 1, bearing frame 10 passes through bearing 11 with center pin 1 and is connected, bearing frame 10 and frame fixed connection, centre wheel 31 and bearing frame 10 fixed connection.

The working principle of the central wheel fixed automatic transmission in the present invention is that power is input from the power input part 2 and output from the central shaft 1, the overrunning pawl 50 and the overrunning ratchet 51 of the overrunning clutch 5 are always in an engaged state, when the gear is shifted, the centrifugal block 47 is under the action of the second elastic part 45, at a position close to the center of the central shaft 1, the pawl 42 is held in the notch 460 of the linkage 46, therefore, the pawl 42 and the ratchet 41 on the power input part 2 are in a disengaged state, power is input from the power input part 2, because the overrunning ratchet 51 arranged on the power input part 2 is engaged with the pawl 50 arranged on the ring gear 30, the overrunning ring gear 30 is driven to rotate, the ring gear 30 drives the planet gear 33 and the planet carrier 32 to rotate, because the planet carrier 32 is fixedly connected with the central shaft 1, the power is finally transmitted to the central shaft 1 and power is output from the central shaft 1, when the process is a deceleration, when the riding speed is faster and reaches , when the riding speed is higher, the centrifugal block 47 overcomes the elastic force of the second elastic part 45 to move in a direction far away from the center shaft 45, because the power input part is linked with the power input rack 46, the power input part 46 and the linkage 46, the power input part is linked with the power input part 46, the linkage 46, the power input part is linked with the power input part 32, the linkage 46, the power input part 32, the linkage 46 is linked, the power input part, the linkage 46 is linked with the power input part 32, the power input part is linked with the power input part, the power input part 32 and the power input part is linked, the linkage 46.

To sum up, the utility model provides a fixed automatic gearshift derailleur of centre wheel compact structure, simple to operate, transmission efficiency are high, it is firm, the variable speed is stable to shift gears, through set up sets of automatic centrifugal gearshift that has linkage and centrifugal piece in the derailleur to can realize full-automatic variable speed, in addition the utility model provides a derailleur can reduce the requirement frequently of stepping on when high fender, thereby make to ride more easily.

The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and are not intended to limit the present invention; it should be noted that, for those skilled in the art, without departing from the inventive concept, several variations and modifications can be made, which are within the scope of the present invention.

Claims

The utility model provides a kind of centre wheel fixed automatic gear shifting transmission, its characterized in that includes center pin, power input piece and the speed change mechanism who sets up between center pin and power input piece, speed change mechanism includes planetary transmission and automatic centrifugal gear shifting mechanism, planetary transmission includes ring gear, centre wheel, planet carrier and planet wheel, the centre wheel is fixedly connected with the frame, planet carrier and center pin fixed connection, automatic centrifugal gear shifting mechanism includes pawl spare frame, ratchet, at least pawl spare, connecting piece, elastic component, second elastic component, link piece and two at least centrifugal blocks, pawl spare frame and planet carrier body shaping or fixed connection, the ratchet sets up on the inner circumference of power input piece, pawl spare installs on pawl spare frame and controls its initial position through elastic component, centrifugal block installs on pawl spare frame and controls its initial position through the second elastic component, connect between centrifugal block and the link piece through the connecting piece, be equipped with the draw-in groove that the link piece cooperatees, the release or the link piece when the power input piece rotates and be equipped with the freewheel clutch piece between the ring gear and the power input piece.
2. The center-wheel fixed automatic transmission of claim 1, wherein the overrunning clutch comprises an overrunning pawl resiliently mounted to the power input, and an overrunning ratchet integrally formed or fixedly attached to the ring gear , or resiliently mounted to the ring gear, and integrally formed or fixedly attached to the power input .
3. The center wheel fixed automatic transmission as claimed in claim 1, wherein the th resilient member is a resilient wire that snaps over the pawl member to resiliently mount the pawl member to the pawl frame.
4. The center wheel fixed automatic transmission of claim 1, wherein the th resilient member is a torsion spring, the pawl is mounted on the pawl frame by a positioning pin, and the torsion spring is sleeved on the positioning pin.
5. The center wheel fixed automatic transmission of claim 1, wherein the eccentric mass is mounted on the pawl frame by a positioning pin, and the second elastic member is sleeved on the positioning pin.
6. The center-wheel fixed automatic transmission of claim 1, wherein the power input member has an end cap at its end, and the end cap is connected to the center shaft by a bearing.
7. The center wheel fixed automatic transmission of claim 1, wherein the center shaft has a bearing seat, the bearing seat is connected with the center shaft through a bearing, the bearing seat is fixedly connected with the frame, and the center wheel is fixedly connected with the bearing seat.
8. The center-wheel fixed automatic transmission of claim 1, wherein the connecting elements are linkage pins or friction plates.
9. The center wheel fixed automatic transmission of claim 1, wherein the linkage is a circular plate, the outer circumferential surface of the slot self-linkage is concave, and the outer side of the slot is provided with a stop.