WO2019047138A1

WO2019047138A1 - Center shaft torque photoelectric sensor structure

Info

Publication number: WO2019047138A1
Application number: PCT/CN2017/100980
Authority: WO
Inventors: 唐明喜
Original assignee: 深圳一哥智行科技有限公司
Priority date: 2017-09-08
Filing date: 2017-09-08
Publication date: 2019-03-14
Also published as: CN107690572A; CN107690572B

Abstract

A center shaft torque photoelectric sensor, comprising a center shaft (1). Cranks (2) are mounted respectively at either extremity of the center shaft (1). A torque sleeve (3) is sleeved on the center shaft (1). An inner end (31) of the torque sleeve (3) is fixedly connected to the center shaft (1). An outer end of the torque sleeve (3) is mounted with a crankset (4) and can rotate relative to the center shaft (1). A circuit board (8) is provided on a shaft sleeve (7). An inner-ring fence (9) is sleeved on the center shaft (1) in front of the inner end (31) of the torque sleeve (3). An outer-ring fence (10) is sleeved on the inner-ring sleeve (9). A tail end (101) of the outer-ring fence (10) is fixedly connected to a tail end of the torque sleeve (3). An inner fence plate (91) of the inner-ring fence (9) overlaps an outer fence plate (101) of the outer-ring fence (10). The inner and outer fence plates (91 and 101) are provided with a gap in the axial direction of the center shaft (1). A through-beam photoelectric sensor (12) is provided on the circuit board (8). The through-beam photoelectric sensor (12) is used for sensing a change in the gap between the inner fence plate (91) and the outer fence plate (101) when the torque sleeve (3) is distorted and distended by a force applied. The center shaft torque photoelectric sensor as a whole is structurally simple, inexpensive, and of great stability.

Description

Center shaft torque photoelectric sensor structure

Technical field

The invention relates to a sensor, in particular to a structure of a central axis torsion photoelectric sensor.

Background technique

Torque sensors are devices used to sense and detect torsional moments on various rotating or non-rotating mechanical components that convert physical changes in torsion into precise electrical signals. The existing central axis torsion sensor structure generally attaches a torsion strain sensor to a torsion deformation component, and the sensor and the torsion deformation component are simultaneously deformed, the overall structure is complicated, the cost is high, and the stability is lacking.

technical problem

The technical problem to be solved by the present invention is to provide a structure of a central axis torsion photoelectric sensor for the deficiencies of the prior art.

Problem solution

Technical solution

In order to solve the above problems, the present invention adopts the following technical solutions.

A mid-axis torsion photoelectric sensor structure includes a central shaft, a crank is respectively disposed at two ends of the central shaft, and the middle shaft is sleeved with a torque sleeve, and the inner end of the torque sleeve is fixedly connected with the central shaft, The outer end of the torsion sleeve is mounted with a toothed disc and is rotatable relative to the central shaft. The tail end of the torsion sleeve and the other end of the central shaft are respectively provided with left and right bearings, and the left and right bearings are respectively provided with left and right teeth. a bowl, a sleeve is arranged between the left and right bowls, and a circuit board is arranged on the sleeve; an inner ring fence is arranged on the front central shaft of the inner end of the torsion sleeve, and the inner ring fence outer sleeve is provided with an outer ring The fence, the tail end of the outer ring fence and the tail end of the torque sleeve are fixedly connected; the inner fence of the inner ring fence and the outer fence of the outer ring fence overlap, and the inner and outer fences have a gap along the radial direction of the central axis; The circuit board is disposed in front of the inner ring fence and vertically sleeved on the central axis; the line plate is provided with a through-beam photoelectric sensor, and the through-beam photoelectric sensor is used for sensing the torsion sleeve to be twisted and deformed under the force, The change in the gap between the inner and outer panels.

Further, the inner and outer fences are even and the number is the same; the inner and outer fences respectively have two alignment panels, and the alignment inner panel and the alignment outer panel center overlap each other, and the alignment inner panel And the center of the alignment fence They are located at both ends of a centerline passing through the center axis, and a one-to-one correspondence between the plates of the other panels except the main fence overlaps and is symmetric with respect to the center line.

Further, the positive inner fence and the right outer fence are respectively symmetrically arranged with respect to the center line, and the gap between the inner fence and the outer panel along the central axis is uniform before the deformation of the torsion sleeve, and each slit The spacing between them is also the same.

Further, the inner fence end of the inner ring fence and the outer panel end of the outer ring fence are aligned, and the inner and outer fences are arranged in parallel with the central axis of the central axis.

Further, a pin hole is disposed on a sidewall of the end of the inner end of the torque sleeve, and an inner counterbore is disposed on a middle shaft corresponding to the pin hole, and both ends of the pin are respectively disposed in the pin hole and the inner counterbore, respectively The diameter of the inner counterbore is larger than the diameter of the pin.

Further, the pair of photoelectric sensors are two and symmetric with respect to the axis of the central axis; the transmitting end and the receiving end of the through-beam photoelectric sensor are respectively located in the circle of the inner ring fence and the outer ring fence In addition, the transmitting end and the receiving end of the pair of photoelectric sensors correspond to each other.

Further, an anti-rotation bowl is arranged on the sleeve near the left tooth bowl, and the outer ring of the anti-rotation bowl is provided with a thread for rotation mounting into the five-way frame of the frame, and the inner ring of the anti-rotation bowl is provided with the central axis The inner groove parallel to the line, the outer ring of the left end of the sleeve is provided with an anti-slip rib, the anti-slip rib is embedded in the inner groove and the number of the anti-slip rib is less than the number of the inner groove.

Further, a sliding bearing is disposed between the inner hole and the middle shaft of the torque sleeve mounting crank disk.

Further, a snap ring groove is disposed at a position corresponding to the left end of the left end of the left bearing, and a snap ring is disposed in the snap ring groove.

Further, a certain gap is reserved between the end surface of the left tooth bowl and the left bearing, and a spring washer is disposed between the gaps.

Advantageous effects of the invention

Beneficial effect

The structure of the central axis torsion photoelectric sensor disclosed in the present invention utilizes a through-beam photoelectric sensor to sense the change of the gap between the inner fence of the inner ring fence and the outer panel of the outer ring fence under the deformation state of the torsion sleeve, thereby obtaining the torque The value of the invention is simple in overall structure, low in cost and good in stability.

Brief description of the drawing

DRAWINGS

1 is a cross-sectional structural view showing the structure of a shaft torque photoelectric sensor of the present invention;

Figure 2 is a cross-sectional view showing the structure of B-B of Figure 1;

3 is a schematic view showing a gap change between the inner fence and the outer panel in the state in which the torsion sleeve is deformed under force;

4 is a schematic diagram of photoelectric sensing signals in which the gap between the inner fence and the outer panel becomes larger and smaller;

FIG. 5 is a schematic diagram of signals obtained after differential processing of the photoelectric sensing signals in FIG. 4; FIG.

Figure 6 is a cross-sectional view taken along line C-C of Figure 1;

Figure 7 is a schematic view showing the structure of Figure 6 when the torsion force reaches the limit;

Figure 8 is a cross-sectional view showing the structure taken along the line A-A of Figure 1.

BEST MODE FOR CARRYING OUT THE INVENTION

The invention will now be described in greater detail with reference to the drawings and embodiments.

The invention discloses a structure of a central axis torsion photoelectric sensor. As shown in FIG. 1 to FIG. 8 , the utility model comprises a middle shaft 1 , a crank 2 is respectively arranged on two ends of the central shaft 1 , and a torque sleeve is arranged on the middle shaft 1 . 3. The inner end 31 of the torque sleeve 3 is fixedly connected with the central shaft 1. The outer end of the torque sleeve 3 is mounted with a crankset 4 and is rotatable relative to the central shaft 1, and the tail end of the torque sleeve 3 and the middle shaft 1 are further The left and

right bearings

51 and 52 are respectively disposed at one end, and the left and

right teeth

61 and 62 are respectively disposed on the left and

right bearings

51 and 52, and the sleeve 7 is provided between the left and

right teeth

61 and 62, and the sleeve is sleeved. 7 is provided with a circuit board 8; the inner middle shaft 1 of the inner end 31 of the torque sleeve 3 is sleeved with an inner ring fence 9, the inner ring fence 9 is provided with an outer ring fence 10, the rear end 101 of the outer ring fence 10 and the torsion The tail end of the sleeve 3 is fixedly connected; the inner fence 91 of the inner ring fence 9 and the outer fence 101 of the outer ring fence 10 are overlapped, and the inner and

outer fences

91, 101 are left with slits in the radial direction of the central axis; 8 is disposed in front of the inner ring fence 9 and vertically sleeved on the central axis 1; the circuit board 8 is provided with an on-beam photoelectric sensor 12, and the through-beam photoelectric sensor 12 is used to induce the torsion sleeve 3 to be distorted under the force Variation of the gap between the inner 91 and the outer fence 101 tailgate. During riding, the crank 2 is driven to rotate the middle shaft 1, the middle shaft 1 drives the torque sleeve 3, and the torque sleeve 3 drives the sprocket wheel 4 to drive the chain. At this time, the torque sleeve 3 is twisted and deformed under the force, and the torque sleeve 3 When the distortion is deformed, the size of the gap between the inner and

outer fences

91, 101 changes, and the radiation photoelectric sensor 12 senses the change in the gap between the inner and

outer fences

91, 101 and outputs the photoelectric sensor via the circuit board 8. The signal, in turn, detects the torque and pedaling force.

In the above solution, the inner and

outer fences

91, 101 are even and the number is the same; the inner and

outer fences

91, 101 respectively have two alignment panels, the alignment inner fence 911 and the alignment outer fence 1011 center alignment overlaps, right The centers of the inner fence 911 and the alignment outer fence 1011 are respectively located at both ends of the center line 11 passing through the center shaft 1, and the one-to-one correspondence between the boards of the other fences other than the main fence overlaps and Symmetrical with respect to the centerline 11. The slits formed on the two sides of the center line 11 and the

outer fences

91 and 101 are deformed by the torsion force become larger on one side and smaller on the other side, based on the partial overlap of the other fences and the symmetry with respect to the center line 11. As shown in FIG. 3, the pair of photoelectric sensors 12 generate different photoelectric sensing signals due to the increase and decrease of the gap. As shown in FIG. 4, after differential processing is performed on the photoelectric sensing signals, a differential signal is generated, as shown in FIG. As shown, torque and pedaling force data can be obtained after processing the differential signal.

Preferably, the positive inner fence 911 and the right outer fence 1011 are symmetrically disposed with respect to the center line 11, respectively, and the gap between the inner fence 91 and the outer panel 101 along the radial direction of the central axis 1 is deformed and deformed in the torque sleeve 3. The front is consistent and the spacing between each gap is also the same.

Preferably, the end of the inner fence 91 of the inner ring fence 9 and the end of the outer panel 101 of the outer ring fence 10 are arranged in alignment, and the directions of the inner and

outer fences

91, 101 are arranged in parallel with the axial line of the central axis 1.

Preferably, the end wall of the inner end of the torsion sleeve 3 is provided with a pin hole 33, and the center shaft 1 corresponding to the pin hole 33 is provided with an inner counterbore 18, and both ends of a pin 13 are respectively disposed through the pin hole 33 and In the inner counterbore 18, the diameter of the inner counterbore 18 is larger than the diameter of the pin 13. As shown in FIG. 6 and FIG. 7, when the torque sleeve 3 is deformed to the limit value relative to the center shaft 1, the pin 13 is in the position shown in FIG. 7, and the torque sleeve 3 is prevented from being overloaded to cause permanent deformation.

Preferably, the pair of photoelectric sensors 12 are two and are symmetrical with respect to the axis of the center axis 1; the transmitting end 121 and the receiving end 122 of the pair of photoelectric sensors 12 are located in the inner and outer rings of the inner ring fence 9, respectively. Outside the circle of the fence 10, the transmitting end 121 and the receiving end 122 of the pair of photoelectric sensors 12 correspond to each other. The two pairs of photoelectric sensors 12 simultaneously collect photoelectric sensing signals whose gaps between the inner and

outer fences

91, 101 become larger and smaller for differential processing.

Preferably, the sleeve 7 is provided with an anti-rotation bowl 63 near the left tooth bowl 61. The outer ring of the anti-rotation bowl 63 is provided with a thread for rotation mounting into the frame five-way, and the inner ring of the anti-rotation bowl 63 is provided. There is an inner groove 631 parallel to the center axis 1 axis, and the left end outer ring of the sleeve 7 is provided with an anti-slip rib 71. The anti-slip rib 71 is embedded in the inner groove 631 and the number of the anti-slip ribs 71 is smaller than the inner groove 631. The number can prevent the sleeve 7 from rotating to break the wire, and also prevent the left tooth bowl 61 from twisting the outlet, as shown in Fig. 8.

Preferably, a sliding bearing 17 is disposed between the inner hole of the torque sleeve 3 and the middle shaft 1 of the torque sleeve 3, so that the torque sleeve 3 and the central shaft 1 can be relatively slid to avoid lateral pressure, and the torque sleeve 3 is prevented from being radial. Deformation and center axis 1 Produce friction.

Preferably, a position of the middle shaft 1 corresponding to the left end surface of the left bearing 51 is provided with a snap ring groove 14 , and the snap ring groove 14 is provided with a snap ring 15 to prevent the relative shaft 1 from coming off.

Preferably, a certain gap is reserved between the end surface of the left tooth cup 61 and the left bearing 51, and a spring washer 16 is disposed between the gaps to prevent the cross-shaft of the center shaft 1 from being caused by the length of the five-way.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. All modifications, equivalents, and improvements made within the technical scope of the present invention are intended to be included within the scope of the present invention.

Claims

A mid-axis torsion photoelectric sensor structure includes a central shaft, and a crank is respectively disposed at two ends of the central shaft, wherein the central shaft is sleeved with a torque sleeve, and the inner end and the middle shaft of the torque sleeve The outer end of the torsion sleeve is mounted with a toothed disc and is rotatable relative to the central shaft. The rear end of the torsion sleeve and the other end of the central shaft are respectively provided with left and right bearings, and the left and right bearings are respectively provided. a left and right tooth bowl, a sleeve is arranged between the left and right teeth bowls, and a circuit board is arranged on the sleeve; an inner ring fence and the inner ring fence are sleeved on the front central shaft of the inner end of the torque sleeve The outer ring fence is arranged on the outer sleeve, and the tail end of the outer ring fence is fixedly connected with the tail end of the torque sleeve; the inner fence of the inner ring fence overlaps with the outer panel of the outer ring fence, and the inner and outer fences are along the radial direction of the central axis. a gap is left; the circuit board is disposed in front of the inner ring fence and vertically sleeved on the central axis; the line plate is provided with a through-beam photoelectric sensor, and the through-beam photoelectric sensor is used for inducing the torque sleeve to occur under the force The change in the gap between the inner and outer panels when the distortion is distorted.
The structure of the central axis torsion photoelectric sensor according to claim 1, wherein the inner and outer fences are even and the number is the same; the inner and outer fences respectively have two alignment panels, the alignment inner panels and The center of the front fence is overlapped, and the center of the right inner fence and the right outer fence are respectively located at both ends of a center line passing through the center axis; and the board size of the other fences except the right fence Consistent, one-to-one correspondence between the plates overlaps and is symmetrical with respect to the center line.
The mid-axis torsion photosensor structure according to claim 2, wherein the alignment inner fence and the alignment outer fence are respectively symmetrically arranged with respect to the center line, and the inner fence and the outer panel are radially along the central axis. The gap size is consistent before the deformation of the torsion sleeve, and the spacing between each slit is also the same.
The mid-axis torsion photosensor structure according to claim 3, wherein the inner fence end of the inner ring fence and the outer panel end of the outer ring fence are arranged in alignment, and the direction of the inner and outer fences is opposite to the central axis. The axis lines are set in parallel.
The structure of a central axis torsion photoelectric sensor according to claim 1, wherein a pin hole is disposed on a sidewall of the inner end of the inner end of the torsion sleeve, and a middle shaft corresponding to the pin hole is disposed inside The counterbore, the two ends of a pin are respectively disposed in the pin hole and the inner counterbore, and the diameter of the inner counterbore is larger than the diameter of the pin.
The mid-axis torsion photosensor structure according to claim 1, wherein the pair of photoelectric sensors are two and symmetric with respect to an axis of the central axis; and the transmitting end and receiving of the through-beam photoelectric sensor The ends are located inside the circle of the inner ring fence and outside the circle of the outer ring fence, and the transmitting end and the receiving end of the pair of photoelectric sensors correspond to each other.
The structure of a central axis torsion photoelectric sensor according to any one of claims 1 to 6, wherein an anti-rotation bowl is arranged on the sleeve near the left tooth bowl, and the outer ring of the anti-rotation bowl is provided with a thread for rotation mounting to the vehicle. In the five-way, the inner ring of the anti-rotation bowl is provided with an inner groove parallel to the axial line of the central axis, and the outer ring of the left end of the sleeve is provided with anti-slip ribs, and the anti-slip rib is embedded in the inner groove and the anti-slip rib The number is less than the number of inner grooves.
The mid-axis torsion photosensor structure according to any one of claims 1 to 6, wherein a sliding bearing is disposed between the inner hole and the center shaft of the torque sleeve mounting crankset.
The structure of the central axis torsion photoelectric sensor according to any one of claims 1 to 6, wherein the left end of the left bearing is provided with a snap ring groove corresponding to the central axis position, and the snap ring groove is provided with a snap ring.
The structure of the central axis torsion photoelectric sensor according to any one of claims 1 to 6, wherein a certain gap is left between the end surface of the left tooth cup and the left bearing, and a spring washer is disposed between the gaps.