Transmission shaft and moped

Abstract

The transmission shaft comprises a middle shaft in transmission connection with a transmission rod, the middle shaft is rotationally matched in a shell assembly, the transmission shaft further comprises a torque sensor, the torque sensor is arranged on the middle shaft and located in the shell assembly, and the torque sensor is arranged on the middle shaft and located in the shell assembly. The utility model provides a transmission shaft which does not occupy space and ensures long service life of gear transmission and a moped.

Description

TECHNICAL FIELD

[0001] The utility model relates to a moped technical field especially relates to a transmission shaft and moped. BACKGROUND

[0002] The moped is a kind of personal transport that has the lightness and convenience of moped, and can effectively make up the burden of moped uphill, against the wind, load time. The front part of transmission shaft uses a pair of bevel gears to convert the torque of transmission from horizontal to vertical, then the torque is transmitted to the rear part of transmission shaft through transmission shaft, and then the vertical torque is converted into horizontal torque by a pair of bevel gears, finally the torque is transmitted to the wheel through the hub to realize driving.

[0003] According to prior art, transmission shaft is matched with speed sensor, and speed sensor is external, which occupies large space;Pedal lightly on stable road surface, and the moped will also be assisted, which adds the friction of extra gear transmission, shortens the service life of gear transmission and increases the cost;On uphill complex road surface, the speed sensor feedback is slow, and the rider cannot get timely assistance when needing assistance, so the effect of "moped" cannot be achieved, and the reaction effect is slow. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a transmission shaft and moped that does not occupy space and ensures long service life of gear transmission.

[0005] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a transmission shaft, comprising a middle shaft connected with a transmission rod, the middle shaft is rotatably connected in a shell assembly, and it further comprises:

[0006] Torque sensor, the torque sensor is arranged on the middle shaft, and the torque sensor is located in the shell assembly.

[0007] After adopting the above structure, the utility model has the following advantages compared with the prior art: the torque sensor is arranged on the middle shaft, and the torque sensor detects the torsional torque of the middle shaft;During riding, whether on stable road surface or uphill rough road section, the torque sensor can accurately monitor the assistance strength required by the rider, accurately feedback signal, do not do power compensation, effectively ensure the service life of gear transmission, reduce the friction of extra gear, and the torque sensor is arranged in the shell assembly, which does not occupy space.

[0008] As a preferred, the torque sensor is detachably connected on the middle shaft, which is convenient to install and replace.

[0009] As a preferred, the middle shaft and the torque sensor are connected by key, and the connection is reliable.

[0010] As preferred, the middle shaft is provided with a snap ring, which is respectively located at both ends of the torque sensor, and limits the torque sensor to prevent the torque sensor from sliding on the middle shaft.

[0011] As preferred, the middle shaft is provided with a first gear connected with the transmission rod, and a ratchet mechanism is arranged between the first gear and the torque sensor, so that the middle shaft can freely idle when reversely rotating, which greatly reduces the resistance of riding.

[0012] As preferred, the ratchet mechanism comprises:

[0013] A ratchet ring is arranged on the inner side wall of the first gear.

[0014] A ratchet tooth is arranged on the outer side of the torque sensor, and the ratchet tooth is matched in the ratchet ring, which has simple structure.

[0015] As preferred, the ratchet ring is detachably arranged on the inner side wall of the first gear, which is convenient for installation and dismounting.

[0016] As preferred, the first gear is rotatably matched on the middle shaft through a bearing at the end away from the torque sensor, which is convenient for the middle shaft to freely idle more smoothly.

[0017] A moped comprises the transmission shaft. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view of the transmission shaft of the utility model.

[0019] Figure 2 is Figure 1 is an enlarged schematic view of middle A.

[0020] Figure 3 is a perspective view of the torque sensor of the transmission shaft of the utility model.

[0021] Wherein, 1, transmission rod, 2, middle shaft, 210, snap ring, 3, shell assembly, 4, torque sensor, 410, key groove, 5, first gear, 6, ratchet mechanism, 610, ratchet ring, 620, ratchet tooth, 7, second gear, 8, idle bearing. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and specific embodiments.

[0023] Figure 1 is a front view of the transmission shaft of the utility model, like Figure 1In the shown embodiment, the utility model provides a kind of transmission shaft, including middle shaft 2 and transmission rod 1, middle shaft 2 is connected with transmission rod 1 transmission.Specifically, the one end of middle shaft 2 is equipped with first gear 5 near transmission rod 1, and second gear 7 meshing with first gear 5 is equipped on transmission rod 1, and first gear 5 and second gear 7 are all conical gears, and the moment of force of transmission is converted from horizontal to vertical direction.Specifically, it further includes shell assembly 3, and middle shaft 2 is rotatably fitted in shell assembly 3.Specifically, two groups of bearings are respectively equipped in shell assembly 3, and the both ends of middle shaft 2 are rotatably fitted on the two groups of bearings.

[0024] To ensure the life of gear transmission, reduce the excess gear friction, it further includes torque sensor 4, torque sensor 4 is equipped in middle shaft 2, torque sensor 4 is located in shell assembly 3, and torque sensor 4 is perceived to the torsional moment of middle shaft 2, in the process of riding, whether it is smooth road or uphill rough road section, torque sensor 4 can accurately monitor the power required by rider, accurate feedback signal, do not do extra work, reduce the excess gear transmission friction, gear transmission long life, low cost;Torque sensor 4 is high in accuracy, and fast in frequency response, and power pedaling is more sensitive, and power sensing feedback is timely on complex road surfaces such as uphill, save battery virtual consumption, increase endurance, reduce cost;Torque sensor 4 is arranged inside shell assembly 3, and space is saved.

[0025] As a kind, to facilitate installation and removal, torque sensor 4 can be detachably connected on middle shaft 2, and installation and replacement are convenient.Specifically, torque sensor 4 is connected on middle shaft 2 by spline.

[0026] To better realize the detachable connection of torque sensor 4, shell assembly 3 is detachably connected with middle shaft 2.Specifically, shell assembly 3 includes shell body 310 and right cover 320, and bearing is arranged in the end of shell body 310 away from right cover 320, and bearing is also arranged in right cover 320, and right cover 320 is screwed on shell body 310, and the both ends of middle shaft 2 are rotatably fitted on the two bearings, and middle shaft 2 can be taken out from shell assembly 3 by removing right cover 320.

[0027] Figure 2 is Figure 1 The enlarged schematic view of middle A, as Figure 2 In the shown embodiment, to position torque sensor 4, two clamping rings 210 are arranged on middle shaft 2, and clamping ring 210 is located at the both ends of torque sensor 4 respectively, to prevent torque sensor 4 from moving axially on middle shaft 2.

[0028] As an embodiment, the ratchet mechanism 6 is arranged between the first gear 5 and the torque sensor 4, and the middle shaft 2 can freely idle when reversely rotating, which greatly reduces the riding resistance.

[0029] Further, the ratchet ring 610 is detachably arranged on the inner side wall of the first gear 5, and is convenient to install and detach.

[0030] Figure 3 is a perspective view of the transmission shaft torque sensor of the utility model, as Figure 3 shown in the embodiment, the inner side wall of one end of the torque sensor 4 is provided with a key groove 410 matched with the spline on the middle shaft 2; and the outer side surface of the other end of the torque sensor 4 is provided with a plurality of ratchet teeth 620 distributed along the outer circumferential direction of the torque sensor 4.

[0031] A moped comprises a middle shaft 2 and a transmission rod 1, the middle shaft 2 converts the torque of transmission from horizontal to vertical by using a pair of bevel gears, then transmits the torque to the rear part of the transmission rod 1 through the transmission rod 1, converts the vertical torque into horizontal torque by a pair of bevel gears, and finally transmits the torque to the wheel through a hub to realize driving.

[0032] Specifically, the whole torque transmission shaft is matched with a frame, and can be directly replaced without changing any parts, which is convenient and universal.

[0033] Specifically, the principle of the utility model is that the torque sensor 4 is arranged on the middle shaft 2, the torque sensor 4 can accurately monitor the required power of the rider and accurately feedback signals by sensing the torsional torque of the middle shaft 2 during riding, whether on a smooth road or an uphill rugged road, without making redundant power compensation, effectively ensuring the gear transmission life, reducing redundant gear friction, and not occupying space because the torque sensor 4 is arranged in the shell assembly 3.

[0034] Working principle: on the basis of the original transmission shaft with ratchet design and installation of torque sensor 4, effectively ensure the life of gear transmission, reduce the redundant gear friction, more can reflect the power release and torque practicality, improve the mutual service life, at the same time, the power-assisted pedal is more sensitive, the power-assisted sensing feedback is timely on complex road surface such as uphill, the battery virtual consumption is saved, and the endurance is increased; the torque sensor 4 is designed in the transmission shaft, and the space is saved.

[0035] On the basis of the above scheme, if various modifications or deformations of the utility model are not out of the spirit and scope of the utility model, if these modifications and deformations are within the scope of the claims and equivalent technology of the utility model, the utility model also intends to include these modifications and deformations.

Claims

1. A drive shaft comprising a central shaft (2) drively connected to a drive rod (1), the central shaft (2) being rotatably fitted within a housing assembly (3), characterized in that: It also includes: Torque sensor (4) is mounted on the central shaft (2) and located inside the housing assembly (3).

2. The drive shaft according to claim 1, characterized in that: The torque sensor (4) is detachably connected to the central shaft (2).

3. The drive shaft according to claim 2, characterized in that: The central shaft (2) is connected to the torque sensor (4) by a key.

4. The transmission shaft according to claim 2 or 3, characterized in that: The central shaft (2) is provided with retaining rings (210), which are located at both ends of the torque sensor (4).

5. The drive shaft according to claim 1, characterized in that: The central shaft (2) is provided with a first gear (5) that is connected to the transmission rod (1) for transmission. A ratchet mechanism (6) is provided between the first gear (5) and the torque sensor (4).

6. The drive shaft according to claim 5, characterized in that: The ratchet mechanism (6) includes: A ratchet ring (610) is provided on the inner side wall of the first gear (5); A ratchet (620) is provided on the outer side of the torque sensor (4) and the ratchet (620) is engaged in the ratchet ring (610).

7. The drive shaft according to claim 6, characterized in that: The ratchet ring (610) is detachably mounted on the inner wall of the first gear (5).

8. The drive shaft according to claim 5, characterized in that: The end of the first gear (5) away from the torque sensor (4) is rotated and fitted onto the central shaft (2) via a bearing.

9. A power-assisted bicycle, characterized in that: It includes a drive shaft as described in any one of claims 1-8.

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