Mounting structure for transmission shaft and inner speed change rear shaft

Abstract

A mounting structure for a transmission shaft and an inner speed change rear shaft is characterized by comprising a transmission shaft outer shell, a quick insertion hole is formed in the transmission shaft outer shell, a bolt is arranged in the quick insertion hole, a hanging bracket is arranged on the transmission shaft outer shell, a left bottom fork connecting plate is arranged on one side of the transmission shaft outer shell, and a right bottom fork connecting plate is arranged on the other side of the transmission shaft outer shell. A left bottom fork is arranged on the left bottom fork connecting plate, an inner speed change rear shaft is arranged on the left bottom fork, a right bottom fork is arranged on the other side of the transmission shaft outer shell, the right bottom fork is connected with the inner speed change rear shaft, spiral bevel gears are used for cooperation, the gear meshing area is increased, the combination tightness of teeth is improved, and abrasion of flywheel teeth is reduced; the stress direction can be changed, the rotating efficiency can be improved, the stability during transmission is high, the whole device and a frame are connected and quickly assembled and disassembled through the design of the bolts and the quick insertion holes, the stability is high, meanwhile, the device is suitable for various inner speed change rear shafts, and the applicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle inner speed change rear axle technical field especially relates to a kind of mounting structure for transmission shaft and inner speed change rear axle. BACKGROUND

[0002] The current market bicycle outer speed change system is to change the speed of bicycle by changing the cooperation of chain and different front and rear gear plates, and the size of front gear plate and rear gear plate determines the strength when rotating pedal, the larger the front gear plate is, the smaller the rear gear plate is, the more effort is felt when pedaling, the smaller the front gear plate is, the larger the rear gear plate is, the more relaxed is felt when pedaling, according to the ability of different riders, the speed of bicycle can be adjusted by adjusting the size of front and rear gear plates, or different road sections and road conditions can be coped with;

[0003] But the outer speed change system is greatly influenced by external environment, and the probability of part damage is large, and the transmission speed ratio and gear meshing structure of transmission shaft lead to uncomfortable riding, gear wears fast and is easily damaged, so higher-end bicycles will use inner speed change system, but there are still inner three flower drums or inner five flower drums, and the nut is prone to loosening during installation, and the stability of transmission shaft and frame docking mode is poor, in order to solve the above problems, a mounting structure for transmission shaft and inner speed change rear axle is provided. UTILITY MODEL CONTENTS

[0004] In view of the above technical problems, the utility model provides a kind of mounting structure for transmission shaft and inner speed change rear axle, it is characterized by including transmission shaft outer shell, quick insertion hole is arranged on the transmission shaft outer shell, bolt is arranged in the quick insertion hole, hanger is arranged on the transmission shaft outer shell, left fork connecting plate is arranged on the one side of the transmission shaft outer shell, left fork is arranged on the left fork connecting plate, inner speed change rear axle is arranged on the left fork, right fork is arranged on the other side of the transmission shaft outer shell, and the right fork is connected with inner speed change rear axle;

[0005] Further, the hanger has an opening, and the upper end of the transmission shaft outer shell is connected with the hanger quickly by being inserted into the quick insertion hole and the opening of the hanger through the bolt;

[0006] Further, a middle shaft is arranged in the transmission shaft outer shell, the two ends of the middle shaft extend out of the transmission shaft outer shell and are connected with two pedals, a fourth arc tooth bevel gear is fixedly arranged at the end of the middle shaft close to the right fork, the end of the right fork is fixedly arranged on the transmission shaft outer shell, a transmission shaft rod is located inside the right fork, the two ends of the transmission shaft rod are respectively a second arc tooth bevel gear and a third arc tooth bevel gear, and the third arc tooth bevel gear is engaged with the fourth arc tooth bevel gear.

[0007] Further, the inner variable speed rear axle has a screw rod extended from each end, the other end of the right fork is connected with the screw rod of the inner variable speed rear axle through a nut, a wire tube fixing frame is arranged on the part of the right fork where the screw rod is extended, and a rotation stopping positioning washer is arranged between the wire tube fixing frame and the right fork;

[0008] Further, the inner variable speed rear axle has a screw rod extended from each end, the other end of the right fork is connected with the screw rod of the inner variable speed rear axle through a nut, a wire tube fixing frame is arranged on the part of the right fork where the screw rod is extended, and a rotation stopping positioning washer is arranged between the wire tube fixing frame and the right fork;

[0009] Further, the left fork is connected with the left fork connecting plate through a screw rod and a nut, the other end of the left fork is fixedly provided with a hook claw, the screw rod of the inner variable speed rear axle near the left fork is extended into the hook claw and is connected through a nut, and a ladder ear is arranged outside the hook claw;

[0010] Further, the inner variable speed rear axle is an inner three-speed variable speed rear axle;

[0011] Further, the inner variable speed rear axle is an inner five-speed variable speed rear axle.

[0012] The utility model discloses a beneficial effect:

[0013] The utility model discloses a drive shaft shell is inserted into the hanger, makes the aperture of hanger and the quick insertion hole of the upper end of drive shaft shell, inserts the bolt into quick insertion hole and the aperture of hanger, makes the drive shaft shell and hanger quick -witted connection, and the left fork is connected with the left fork connecting plate through screw rod and nut, and then the inner three -speed variable speed rear axle or inner five -speed variable speed rear axle is connected with the left fork and right fork through the screw rod of both ends, and the left end is connected with the hook claw through the screw rod, and is connected with the ladder ear through screw rod and nut on the outside, and the right end is connected with the wire tube fixing frame through the screw rod of the right fork extension, and there is rotation stopping positioning washer between both, and the first involute bevel gear of the inner three -speed variable speed rear axle or inner five -speed variable speed rear axle right -hand end is connected through the thread and is engaged with the second involute bevel gear on the transmission axle rod in the right fork, and there is dust cover on the outside, and the middle shaft is driven to rotate through the footrest of both ends in the drive shaft shell, and the fourth involute bevel gear fixedly arranged on the middle shaft is engaged with the third involute bevel gear of the transmission axle rod in the right fork, and the power is transmitted to the inner three -speed variable speed rear axle or inner five -speed variable speed rear axle through the transmission axle rod, and the installation is completed, uses the involute bevel gear cooperation, increases the gear engagement area, improves the combination density of tooth and tooth, reduces the wear of the flywheel tooth, can change the stress direction and can improve the rotation efficiency, and the stability is strong when transmitting, and the design of bolt and quick insertion hole makes the quick installation and dismounting of the whole device and the connection of the frame, and the stability is strong, and simultaneously adapts to various inner variable speed rear axles, and improves the applicability. ACCURACY OF DRAWINGS

[0014] Figure 1The utility model relates to a whole structure schematic diagram for the mounting structure of transmission shaft and inner variable speed rear axle,

[0015] Figure 2 The utility model relates to an inner three-speed variable speed rear axle structure explosion schematic view for the mounting structure of transmission shaft and inner variable speed rear axle,

[0016] Figure 3 The utility model relates to an inner five-speed variable speed rear axle structure explosion schematic view for the mounting structure of transmission shaft and inner variable speed rear axle,

[0017] As shown in the figure: 1 transmission shaft shell, 2 middle axle, 3 hanger, 4 quick insertion hole, 5 bolt, 6 left fork connecting plate, 7 left fork, 8 hook claw, 9 car ladder ear piece, 10 inner variable speed rear axle, 11 first arc tooth bevel gear, 12 dust cover, 13 right fork, 14 transmission shaft rod, 15 wire pipe fixing frame, 16 rotation-stopping positioning washer, 17 second arc tooth bevel gear, 18 third arc tooth bevel gear, 19 fourth arc tooth bevel gear, 20 inner three-speed variable speed rear axle, 21 inner five-speed variable speed rear axle. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be described below in connection with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0019] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it can not be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and can not be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the communication, for the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.In addition, the technical features involved in the different embodiments of the utility model described below can be combined as long as they do not conflict with each other.

[0021] Embodiment 1

[0022] The utility model provides a kind of installation structure for transmission shaft and inner speed change rear axle 10, it is characterized by including transmission shaft outer casing 1, quick insertion hole 4 is provided on transmission shaft outer casing 1, bolt 5 is provided in quick insertion hole 4, transmission shaft outer casing 1 is provided with hanger 3, the side of transmission shaft outer casing 1 is provided with left fork connecting plate 6, left fork connecting plate 6 is provided with left fork 7, left fork 7 is provided with inner speed change rear axle 10, the other side of transmission shaft outer casing 1 is provided with right fork 13, and right fork 13 is connected with inner speed change rear axle 10;

[0023] Further, hanger 3 has an opening, and the upper end of transmission shaft outer casing 1 is connected with hanger 3 quickly by being inserted into the opening of hanger 3 and quick insertion hole 4 through bolt 5;

[0024] Further, a middle shaft 2 is arranged in transmission shaft outer casing 1, both ends of the middle shaft 2 extend out of the transmission shaft outer casing 1 and are connected with two pedals, a fourth arc toothed bevel gear 19 is fixedly arranged at one end of the middle shaft 2 close to the right fork 13, one end of the right fork 13 is fixedly arranged on the transmission shaft outer casing 1, a transmission shaft rod 14 is located inside the right fork 13, both ends of the transmission shaft rod 14 are respectively a second arc toothed bevel gear 17 and a third arc toothed bevel gear 18, and the third arc toothed bevel gear 18 is engaged with the fourth arc toothed bevel gear 19;

[0025] Further, each of both ends of the inner speed change rear axle 10 has a screw rod extending out, the other end of the right fork 13 is connected with the screw rod extending out of the inner speed change rear axle 10 through a nut, a wire tube fixing bracket 15 is arranged on the part of the right fork 13 from which the screw rod extends out, and there is a rotation-stopping positioning washer 16 between the wire tube fixing bracket 15 and the right fork 13;

[0026] Further, a first arc toothed bevel gear 11 is arranged at one end of the inner speed change rear axle 10 close to the right fork 13 through threads, the first arc toothed bevel gear 11 is engaged with the second arc toothed bevel gear 17, and a dust cover 12 is arranged on the outside of the first arc toothed bevel gear 11;

[0027] Further, one end of the left flat fork 7 is connected with the left flat fork connecting plate 6 through a screw nut, and the other end of the left flat fork 7 is fixedly provided with a hook claw 8, a screw rod of an inner variable speed rear axle 10 near one end of the left flat fork 7 extends into the hook claw 8 and is connected through a nut, and a ladder lug 9 is arranged outside the hook claw 8;

[0028] Further, the inner variable speed rear axle 10 is an inner three-speed variable speed rear axle 20.

[0029] Further, the inner variable speed rear axle 10 is an inner five-speed variable speed rear axle 21.

[0030] Embodiment 2

[0031] In use, the hanger 3 is inserted into the transmission shaft outer shell 1, the opening of the hanger 3 is matched with the quick insertion hole 4 at the upper end of the transmission shaft outer shell 1, the bolt 5 is inserted into the quick insertion hole 4 and the opening of the hanger 3, the transmission shaft outer shell 1 is quickly connected with the hanger 3, the left flat fork 7 is connected with the left flat fork connecting plate 6 through a screw nut, the inner three-speed variable speed rear axle 20 or the inner five-speed variable speed rear axle 21 is connected with the left flat fork 7 and the right flat fork 13 through screw rods at two ends, the left end is connected with the hook claw 8 through a screw rod and is connected with the ladder lug 9 outside through a screw nut, the right end is connected with the wire pipe fixing frame 15 through a screw rod extending out of the right flat fork 13, and there is a rotation-stopping positioning gasket 16 between the two, the right end of the inner three-speed variable speed rear axle 20 or the inner five-speed variable speed rear axle 21 is meshed with the second arc tooth bevel gear 17 on the transmission shaft rod 14 in the right flat fork 13 through a threaded connection, and there is a dust cover 12 outside, the middle shaft 2 is driven to rotate through the pedal at two ends of the transmission shaft outer shell 1, the fourth arc tooth bevel gear 19 fixedly arranged on the middle shaft 2 is meshed with the third arc tooth bevel gear 18 of the transmission shaft rod 14 in the right flat fork 13, power is transmitted to the inner three-speed variable speed rear axle 20 or the inner five-speed variable speed rear axle 21 through the transmission shaft rod 14, and installation is completed.

[0032] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The various components mentioned in the utility model are common technologies in the prior art, which should be understood by those skilled in the art, and the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A mounting structure for a drive shaft and an inner variable speed rear axle, characterized by, The transmission shaft outer shell is provided with a quick insertion hole, a bolt is arranged in the quick insertion hole, a hanger is arranged on the transmission shaft outer shell, a left fork connecting plate is arranged on one side of the transmission shaft outer shell, a left fork is arranged on the left fork connecting plate, an inner variable speed rear axle is arranged on the left fork, and a right fork is arranged on the other side of the transmission shaft outer shell and connected with the inner variable speed rear axle.

2. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 1, characterized in that, The upper end of the transmission shaft outer shell is inserted into the quick insertion hole and the opening of the hanger through the bolt and is quickly connected with the hanger.

3. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 1, wherein A middle shaft is arranged in the transmission shaft outer shell, both ends of the middle shaft extend out of the transmission shaft outer shell and are connected with two pedals, a fourth arc tooth bevel gear is fixedly arranged at one end of the middle shaft close to the right fork, one end of the right fork is fixedly arranged on the transmission shaft outer shell, a transmission shaft rod is arranged in the right fork, both ends of the transmission shaft rod are respectively a second arc tooth bevel gear and a third arc tooth bevel gear, and the third arc tooth bevel gear is engaged with the fourth arc tooth bevel gear.

4. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 3, characterized in that, Both ends of the inner variable speed rear axle each have an extended screw rod, the other end of the right fork is connected with the extended screw rod of the inner variable speed rear axle through a nut, a wire tube fixing frame is arranged on the part of the right fork from which the screw rod extends, and a rotation-stopping positioning gasket is arranged between the wire tube fixing frame and the right fork.

5. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 4, wherein A first arc tooth bevel gear is arranged at one end of the inner variable speed rear axle close to the right fork through threads, the first arc tooth bevel gear is engaged with a second arc tooth bevel gear, and a dust cover is arranged outside the first arc tooth bevel gear.

6. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 5, wherein One end of the left fork is connected with the left fork connecting plate through a screw rod and a nut, the other end of the left fork is fixedly provided with a hook, the screw rod at one end of the inner variable speed rear axle close to the left fork extends into the hook and is connected through a nut, and a bicycle ladder ear is arranged outside the hook.

7. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 6, wherein The inner variable speed rear axle is an inner three-speed variable speed rear axle.

8. A mounting structure for a drive shaft and an inner variable speed rear axle according to claim 6, wherein The inner variable speed rear axle is an inner five-speed variable speed rear axle.

Images