Card base torque sensing device easy to disassemble

Abstract

The utility model discloses a card base torque sensing device easy to disassemble, which comprises a card base and a torque sensing detection assembly, and is characterized in that the card base comprises an end cover connecting shaft sleeve fixed with an end cover of a hub motor and a card base shell arranged at the periphery of the end cover connecting shaft sleeve; the torque sensing and detecting assembly comprises a strain gauge arranged on the end cover connecting shaft sleeve and a first signal processing circuit board electrically connected with the strain gauge, and is characterized in that the front part of the end cover connecting shaft sleeve extends into the inner side of the end cover, and the torque sensing and detecting assembly further comprises a signal transmission assembly located on the inner side of the end cover; the induction coil comprises an inner induction coil fixed on the end cover connecting shaft sleeve and an outer induction coil fixed on the coil bracket, and the inner induction coil is electrically connected with the first signal processing circuit board; the coil support is fixed with the motor shaft, a second signal processing circuit board electrically connected with the outer induction coil is further fixed on the coil support, and the second signal processing circuit board is connected with a motor wiring control board inside the hub motor through a lead. According to the utility model, the whole device can be conveniently detached from the hub motor, and the internal lead of the hub motor does not need to be pulled out.

Description

TECHNICAL FIELD

[0001] The utility model relates to an easy-to-dismount clamping base torque sensing device. BACKGROUND

[0002] The existing clamping base torque sensing device is a clamping base structure assembly provided with a torque sensing detection component, which is mainly installed on the motor shaft outside the end cover of the hub motor shell, detects the central shaft pedal force transmitted through the chain by the strain gauge attached to the inside of the clamping base, and converts it into an electrical signal to transmit to the control circuit board of the internal movement to control the speed increase or decrease of the hub motor.

[0003] As the structural basis of the clamping base torque sensing device, the clamping base usually includes an end cover connecting shaft sleeve sleeved on the motor shaft and a clamping base shell placed around it. The front end of the end cover connecting shaft sleeve is formed with a connecting flange fixed with the end cover of the hub motor shell, and the inner periphery is supported on the motor shaft through the hub bearing. The inner periphery of the clamping base shell is supported on the motor shaft through the clamping base bearing set. And for the convenience of disassembling the clamping base shell, in the current clamping base structure design on the market, the one-way clutch between the clamping base shell and the end cover connecting shaft sleeve is usually arranged side by side inside the clamping base bearing set to facilitate the axial disengagement of the pawl in the one-way clutch relative to the ratchet shaft without interfering with the clamping base bearing, thereby ensuring that the clamping base shell and the end cover connecting shaft sleeve can be independently disassembled, facilitating replacement and maintenance.

[0004] However, in practice, the above-mentioned clamping base torque sensing device still has the problem of being difficult to disassemble as a whole from the hub motor, and the reason is that:

[0005] In such a clamping base torque sensing device, the strain gauge of the torque sensing detection component is usually fixed on the end cover connecting shaft sleeve, and its lead wire enters the inside of the hub motor shell through the end cover shaft hole and is connected with the control circuit board on the movement. Therefore, if the clamping base torque sensing device as a whole is to be disassembled from the end cover, in addition to the end cover connecting shaft sleeve being removed from the end cover, the lead wire between the torque sensing detection component and the motor wiring control board on the movement also needs to be removed. Therefore, the worker must first remove the end cover, pull out the movement and then perform the operation, which is relatively cumbersome, greatly reduces the disassembly efficiency of the clamping base torque sensing device, and is not conducive to the improvement of its production and assembly efficiency, nor is it convenient for the subsequent replacement and maintenance of the parts. SUMMARY

[0006] The utility model aims at: provide a kind of clamping base torque sensing device of easy to dismount, it is very convenient to dismount as a whole from the hub motor, and without the removal operation of the lead wire in the hub motor.

[0007] The utility model discloses a technical scheme is: an easy to dismantle card base torque sensing device, including the motor shaft of the motor of installation in wheel hub motor and set up on the torque sensing detection subassembly of card base, and card base includes the end cover connecting shaft sleeve of fixed end cover of wheel hub motor and sets up the card base shell of end cover connecting shaft sleeve peripheral, and torque sensing detection subassembly includes the strain gauge of setting on end cover connecting shaft sleeve and the first signal processing circuit board of electric connection, and its characterized in that end cover connecting shaft sleeve front part stretches into end cover inboard, and torque sensing detection subassembly still includes the signal transmission component of being located in end cover inboard, and it includes the inner induction coil of being fixed on end cover connecting shaft sleeve and the outer induction coil of being fixed on coil support and being located in the peripheral of inner induction coil, and inner induction coil is electrically connected with the first signal processing circuit board, and coil support is fixed on motor shaft, and the second signal processing circuit board of electric connection with outer induction coil is still fixed on this coil support, and this second signal processing circuit board is connected through lead wire with motor wiring control board in the inside of wheel hub motor.

[0008] Further, the front part of the end cover connecting shaft sleeve in the utility model supports the motor shaft through the hub bearing, and the front part of the end cover connecting shaft sleeve is formed with a connecting flange inside the end cover, and the connecting flange is fixed with the end cover through connecting screws.

[0009] Further, the front end of the end cover connecting shaft sleeve in the utility model is formed with a coil positioning rib for fixing the inner induction coil.

[0010] Further, the motor shaft on the inside of the end cover is fixed with a support positioning sleeve through the key groove, and the coil support is fixed on the support positioning sleeve.

[0011] Further, the front part of the card base shell in the utility model is connected with the peripheral of the end cover connecting shaft sleeve through the one-way clutch, and the rear part of the card base shell is supported on the motor shaft through the card base bearings.

[0012] Further, the motor core and the motor speed reduction mechanism are sequentially arranged on the inside of the end cover of the wheel hub motor along the motor shaft, and the motor wiring control board is fixed on the side of the motor core facing the end cover.

[0013] Alternatively, in another specific embodiment, the motor core and the motor speed reduction mechanism are sequentially arranged on the inside of the end cover of the wheel hub motor along the motor shaft, the motor wiring control board is fixed on the side of the motor core away from the motor speed reduction mechanism, and the lead wire is connected with the motor wiring control board through the lead wire slot on the motor shaft.

[0014] As the conventional technology, the card base shell in the utility model is used for installing multistage transmission wheel, such as belt pulley or chain wheel, and then is connected with the transmission wheel in the inner side of the axle pedal in the electric bicycle via corresponding belt or chain.The motor wiring control panel is used for receiving the torque sensing signal of the strain gauge, and then the output power of the movement is controlled, and the wheel hub motor rotating speed is changed.

[0015] The utility model has the advantages of:

[0016] 1、The utility model discloses a signal transmission assembly that adopts the cooperation of the inner and outer induction coils, when the card base needs to be removed from the wheel hub motor, only the end cover is removed, and then the card base can be removed as a whole relative to the wheel hub motor, without the need of removing the lead inside the wheel hub motor, the whole process is convenient to operate, greatly improves the dismounting efficiency of the card base torque sensing device, is beneficial to the improvement of the production and assembly efficiency, and is convenient for the operation of subsequent component replacement and maintenance.

[0017] 2、The signal transmission assembly that the utility model discloses the cooperation of the inner and outer induction coils is arranged at the inner side of the end cover of the wheel hub motor, so that the induction coil and the signal processing board can be well protected, and the pollution of being arranged on the outer card base in the conventional technology is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings and examples:

[0019] Figure 1 It is the overall structure section view of a specific embodiment of the utility model;

[0020] Figure 2 It is Figure 1 It is the enlarged schematic view of A;

[0021] Figure 3 It is the overall structure section view of another specific embodiment of the utility model.

[0022] Wherein: 1, wheel hub motor;1A, movement;1B, motor speed reduction mechanism;2, motor shaft;3, end cover;4, end cover connecting shaft sleeve;401, connecting flange;402, coil positioning rib;5, card base shell;6, strain gauge;7, first signal processing circuit board;8, inner induction coil;9, coil support;10, outer induction coil;11, second signal processing circuit board;12, motor wiring control panel;13, lead;14, wheel hub bearing;15, connecting screw;16, support positioning sleeve;17, one-way clutch;18, card base bearing. PREFERRED EMBODIMENT

[0023] Example 1: first, the utility model will be described in connection with Figures 1-2The specific implementation of the easy-to-disassemble card base torque sensing device is shown in the utility model as follows:

[0024] The overall structure is composed of the wheel hub motor 1, the card base installed on the motor shaft 2 of the wheel hub motor 1, and the torque sensing detection assembly arranged on the card base. Like the known technology, the shell of the wheel hub motor 1 is provided with a detachable end cover 3. The inside of the end cover 3 is sequentially provided with a speed reduction mechanism 1B and a core 1A along the motor shaft 2. The side of the core 1A, which is opposite to the motor speed reduction mechanism 1B, is fixed with a motor wiring control panel 12.

[0025] The card base comprises an end cover connecting shaft sleeve 4 fixed with the end cover 3 of the wheel hub motor 1 and a card base shell 5 arranged on the periphery of the end cover connecting shaft sleeve 4. The front inner periphery of the card base shell 5 is connected with the periphery of the end cover connecting shaft sleeve 4 through a one-way clutch 17, and the rear inner periphery of the card base shell 5 is supported on the motor shaft 2 through two card base bearings 18, as shown in Figure 1 and Figure 2 Like the prior art, the card base shell 5 is provided with a plurality of transmission wheels (not marked in the figure), such as belt pulleys or chain wheels, which are further connected with the transmission wheels on the inner side of the central pedal shaft of the electric bicycle through corresponding belts or chains.

[0026] The torque sensing detection assembly comprises a strain gauge 6 arranged on the end cover connecting shaft sleeve 4 and a first signal processing circuit board 7 electrically connected with the strain gauge 6.

[0027] Further combining Figure 1 and Figure 2 The core improvement of the utility model lies in that the front part of the end cover connecting shaft sleeve 4 extends into the inside of the end cover 3. The torque sensing detection assembly further comprises a signal transmission assembly located in the inside of the end cover 3. The signal transmission assembly comprises an inner induction coil 8 fixed on the end cover connecting shaft sleeve 4 and an outer induction coil 10 fixed on a coil support 9 and located on the periphery of the inner induction coil 8. The inner induction coil 8 is electrically connected with the first signal processing circuit board 7. The coil support 9 is fixed on the motor shaft 2. The coil support 9 is further fixed with a second signal processing circuit board 11 electrically connected with the outer induction coil 10. The second signal processing circuit board 11 is provided with a lead wire 13. The lead wire 13 is connected with the motor wiring control panel 12 through a lead wire slot arranged on the motor shaft 2, as shown in Figure 1 .

[0028] In the embodiment, the front inner periphery of the end cover connecting shaft sleeve 4 is supported on the motor shaft 2 through a wheel hub bearing 14. The front outer side of the end cover connecting shaft sleeve 4 is formed with a connecting flange 401 located in the inside of the end cover 3. The connecting flange 401 is fixed with the end cover 3 through a connecting screw 15.

[0029] The front end of the end cover connecting shaft sleeve 4 is formed with a coil positioning protruding rib 402 for fixing the inner induction coil 8.

[0030] The bracket positioning sleeve 16 is fixed on the motor shaft 2 inside the end cover 3, and the coil bracket 9 is fixed on the bracket positioning sleeve 16.

[0031] In the embodiment 2, the hub motor 1, the clamping base and the torque sensing detection assembly are integrally formed, the shell of the hub motor 1 is provided with a detachable end cover 3, the motor core 1A and the motor speed reduction mechanism 1B are sequentially arranged inside the end cover 3 along the motor shaft 2, the motor wiring control panel 12 is fixed on the side of the motor core 1A facing the end cover 3, the lead 13 on the second signal processing circuit board 11 is directly connected with the motor wiring control panel 12, and thus the lead slot is not needed to be arranged in the motor shaft 2. Figure 2 The rest of the structure of the embodiment 1 is the same as that of the embodiment 1, and the description of the embodiment 1 and the description of the embodiment 2 can be referred to.

[0032] In the embodiment, the signal transmission assembly formed by the inner induction coil 8 and the outer induction coil 10 is arranged inside the end cover 3 of the hub motor 1, the inner induction coil 8, the outer induction coil 10 and the second signal processing circuit board 11 can be well protected, and the clamping base can be removed from the hub motor 1 by only removing the end cover 3, without removing the lead in the hub motor 1.

[0033] The signal transmission assembly formed by the inner induction coil 8 and the outer induction coil 10 is arranged inside the end cover 3 of the hub motor 1, the inner induction coil 8, the outer induction coil 10 and the second signal processing circuit board 11 can be well protected, and the clamping base can be removed from the hub motor 1 by only removing the end cover 3, without removing the lead in the hub motor 1.

[0034] Of course, the above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any modification made according to the spirit and essence of the main technical scheme of the utility model should be covered in the protection scope of the utility model.

Claims

1. An easily detachable card base torque sensing device, comprising a card base installed on a motor shaft (2) of a wheel hub motor (1) and a torque sensing detection assembly arranged on the card base, the card base comprising a end cover connecting shaft sleeve (4) fixed with an end cover (3) of the wheel hub motor (1) and a card base shell (5) arranged on the periphery of the end cover connecting shaft sleeve (4), the torque sensing detection assembly comprising a strain gauge (6) arranged on the end cover connecting shaft sleeve (4) and a first signal processing circuit board (7) electrically connected therewith, characterized in that The front part of the end cover connecting shaft sleeve (4) extends into the inside of the end cover (3), and the torque sensing detection assembly further comprises a signal transmission assembly located in the inside of the end cover (3), which comprises an inner induction coil (8) fixed on the end cover connecting shaft sleeve (4) and an outer induction coil (10) fixed on a coil bracket (9) and located at the periphery of the inner induction coil (8), and the inner induction coil (8) is electrically connected with a first signal processing circuit board (7); the coil bracket (9) is fixed on the motor shaft (2), and a second signal processing circuit board (11) electrically connected with the outer induction coil (10) is further fixed on the coil bracket (9), and the second signal processing circuit board (11) is connected with a motor wiring control board (12) in the inside of the hub motor (1) through a lead wire (13).

2. The easily detachable card-based torque sensing device of claim 1, wherein The front part of the end cover connecting shaft sleeve (4) is supported on the motor shaft (2) through a hub bearing (14), and the front outside of the end cover connecting shaft sleeve (4) is formed with a connecting flange (401) located in the inside of the end cover (3), and the connecting flange (401) is fixed with the end cover (3) through a connecting screw (15).

3. The easy-to-disassemble card-based torque sensing device according to claim 1 or 2, characterized in that The front end of the end cover connecting shaft sleeve (4) is formed with a coil positioning rib (402) for fixing the inner induction coil (8).

4. The easily detachable card-based torque sensing device of claim 1, wherein The motor shaft (2) in the inside of the end cover (3) is fixed with a bracket positioning sleeve (16) in key groove cooperation, and the coil bracket (9) is fixed on the bracket positioning sleeve (16).

5. The easily removable card-based torque sensing device of claim 1, wherein The front part of the card base shell (5) is connected with the periphery of the end cover connecting shaft sleeve (4) through a one-way clutch (17), and the rear part of the card base shell (5) is supported on the motor shaft (2) through a plurality of card base bearings (18).

6. The easily detachable card-based torque sensing device of claim 1, wherein The inside of the end cover (3) of the hub motor (1) is sequentially provided with a core (1A) and a motor speed reduction mechanism (1B) along the motor shaft (2), and the motor wiring control board (12) is fixed on one side of the core (1A) facing the end cover (3).

7. The easily removable card-based torque sensing device of claim 1, wherein The inside of the end cover (3) of the hub motor (1) is sequentially provided with a motor speed reduction mechanism (1B) and a core (1A) along the motor shaft (2), and the motor wiring control board (12) is fixed on one side of the core (1A) away from the motor speed reduction mechanism (1B), and the lead wire (13) is connected with the motor wiring control board (12) through a lead wire slot provided on the motor shaft (2).

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