TWI803196B - Bicycle bottom bracket torque detection mechanism - Google Patents

Abstract

This case is a bicycle five-way torque detection mechanism that can effectively and accurately detect the torque value of the bicycle crank shaft, including: a crank shaft with a first accommodation area and a second accommodation area on the shaft, a The strain sleeve on the shaft rod in the first accommodation area of the shaft, at least one elastic body subjected to bending moment, a chain disc sleeve arranged in series on the crankshaft and driven to rotate by the crankshaft, and a chain sleeve arranged in series in the second accommodation area of the crankshaft The assembly of the circuit board on the shaft rod in the setting area; one end of the elastic body that receives the bending moment is abutted against the abutting part protruding from the axial surface of the crankshaft, and the other end is abutted against the strain sleeve, and the rear end of the strain sleeve is engaged with the chain disc sleeve, when the crank shaft drives the chain disc sleeve to rotate, the rotational torque of the crank shaft will cause deformation of the bending moment elastic body between the crank shaft and the strain sleeve, and the bending moment elastic body The strain-sensing sheet transmits the deformation value of the elastic body subjected to the bending moment to the circuit board assembly to detect the change of the torque, and then constitutes a bicycle bottom bracket torque detection mechanism with a simplified structure, low cost, accurate detection, and industrial applicability.

Description

Bicycle bottom bracket torque detection mechanism

A bicycle bottom bracket torque detection mechanism capable of effectively and accurately detecting the torque value acting on the bicycle crank shaft.

It is generally known that the torque detection of bicycles is designed on the crankshaft inside the bottom bracket of the bicycle or the wheel hub of the bicycle. Such known related technical creations are as follows: announcements TW I638748B, TW M408538U, TW M372072U, TW 293509, TW 277492, TW M621992, TW M614076U, TW M570944U, TW M482547U, TW I564214B, TW M374395U, TW I401186B, TW M339677U, TW M566544U and other prior technical documents.

It can be seen from the above-mentioned known related technical creations that there are disadvantages such as complex structure, many components, poor usability of structural space, large volume and heavy weight, and these shortcomings have more seriously affected the actual performance of the technical creation itself. Industry exploits flaws and troubles.

Therefore, how to create a bicycle torque detection mechanism with good structural space utilization, simple structure, low cost, light volume, and accurate detection is a technical research and development goal that the relevant industry expects to break through and innovate.

The purpose of the creation of the "bicycle bottom bracket torque detection mechanism" in this case is to:

(1) Provide a bicycle bottom bracket torque tester with simplified structure, low cost, light volume and accurate detection Measuring agency.

(2) To provide a bicycle bottom bracket torque detection mechanism with excellent practical industrial applicability and high economic benefits.

The torsion detection mechanism in this case includes: a crankshaft provided with a shaft for the first accommodation area and the second accommodation area, a strain sleeve placed in series on the shaft rod of the first accommodation area of the crankshaft, at least one bending Rectangular elastic body, a chain disc sleeve placed in series on the crankshaft and rotated by the crankshaft, and a circuit board assembly placed in series on the shaft rod in the second accommodation area of the crankshaft; it is characterized in that: a crankshaft , at least one abutting portion protruding from the shaft is provided on the shaft of the first accommodation area of the crankshaft; at least one elastic body subjected to bending moment, the elastic body subjected to bending moment abuts against the protrusion disposed on the crankshaft Between the abutting part on the shaft rod of the first accommodation area and the abutment part of a strain sleeve placed in series on the shaft rod of the first accommodation area of the crankshaft; The strain sleeve on the rod, the strain sleeve extends horizontally in the direction of the crankshaft protruding abutting part, and is provided with abutment parts equal to the number of crankshaft protruding abutment parts; the rear end of the strain sleeve is engaged with a Driven by the crankshaft and the chain disc sleeve.

One end of the elastic body that should be subjected to bending moment is abutted against the abutting portion protruding from the crankshaft shaft, and the other end is abutted against the abutting portion of the strain sleeve, and the rear end of the strain sleeve is engaged with the chain disc sleeve. When the shaft drives the chain disc sleeve to rotate, the rotational torque of the crankshaft will cause deformation of the moment-bearing elastic body between the crankshaft and the strain sleeve, and the strain-sensing sheet on the moment-bearing elastic body will be affected The deformation value of the bending moment elastic body is transmitted to the circuit board assembly to detect the change of the torque, and then constitutes a foot with a simple structure, low cost, light volume, accurate detection, and industrial applicability. Treadmill bottom bracket torque detection mechanism.

1: Crankshaft

1A: offset part

2: Strain sleeve

2A: offset part

3: Bending moment elastic body

3A: Strain sensing sheet

4: Chain disc sleeve

5: Circuit board assembly

6: Right side cover

7: Left cover

8: Shell

8A: Through hole

9, 10: Bearing

11: Gasket

12, 13: C-shaped buckle

14: elastic washer

A: The first storage area

B: Second storage area

Figure 1: Schematic diagram of the composition of the creative embodiment of this case.

Figure 2: Sectional view of the assembled embodiment of the creation of this case.

Figure 3: Section A-A of Figure 2.

Fig. 4: the crankshaft stereogram of this case creation embodiment.

Fig. 5: The crankshaft of the creation embodiment of this case.

Figure 6: Left side view of Figure 5.

Figure 7: A-A sectional view of Figure 5.

Figure 8: B-B sectional view of Figure 5.

Figure 9: A three-dimensional view of the strain sleeve of the creative embodiment of this case.

Figure 10: The strain sleeve of the creative embodiment of this case.

Figure 11: Left side view of Figure 10.

Figure 12: Right side view of Figure 10.

Figure 13: A-A sectional view of Figure 11.

Figure 14: A three-dimensional view of the elastic body subject to bending moment in the creation embodiment of this case.

Figure 15: The moment elastic body of the creation embodiment of this case.

Figure 16: Right side view of Figure 15.

Figure 17: A schematic diagram of the combination of the crankshaft, the strain sleeve and the moment-bearing elastic body of the creative embodiment of this case.

Please refer to Figure 1 to Figure 3 in the drawings for the embodiment of the "bicycle bottom bracket torque detection mechanism" shown in Figure 1. As shown in Figure 1, the components of this embodiment include: crank shaft 1, strain sleeve 2, bending moment Elastomer 3, chain disc sleeve 4, circuit board assembly 5, right side cover 6, left side cover 7, shell 8, bearing 9, bearing 10, spacer 11, C-shaped buckle 12, C-shaped buckle 13 and elastic Gasket 14.

Please refer to Figure 1 in the drawings, the crank shaft 1 is provided with a first accommodation area A and a second accommodation area B, and the first accommodation area A is for the elastic body 3 and the strain sleeve 2 to be placed in a fixed position. , the second accommodating area B is used for placing the circuit board assembly 5 , and the outside of the first accommodating area A and the second accommodating area B are covered by a casing 8 .

As shown in Fig. 2 and Fig. 3, at least one abutment portion 1A integrally formed protruding from the shaft rod is provided on the shaft rod of the first accommodation area A of the crankshaft 1 (as shown in Fig. 4 to Fig. 8 ). The number of the at least one abutting portion 1A is equal to the number of the elastic body 3 subjected to the bending moment, and the abutting portion 1A is abutted against one side end of the elastic body 3 receiving the bending moment; the strain sleeve 2 is engaged and interlocked On the chain plate sleeve 4, the strain sleeve 2 (as shown in Fig. 3 and Fig. 9 to Fig. 13) extends horizontally in the direction of the crankshaft 1 protruding from the abutting portion 1A, and is provided with an equal number of protruding and abutting portions on the crankshaft 1 The abutment portion 2A of the number of parts 1A, the abutment portion 2A is abutted against the other side end of the moment elastic body 3; One end is against the abutting portion 1A of the crankshaft 1, and the other end of the moment elastic body 3 is abutted against the abutment portion 2A horizontally extended in the direction of the abutting portion 1A protruding from the strain sleeve 2 toward the crankshaft 1. , and a strain sensing sheet 3A is pasted on the moment elastic body 3 , and the strain sensing sheet 3A is in signal communication with the circuit board assembly 5 .

As shown in Figures 1 and 2, the housing 8 is sleeved on the assembled strain sleeve 2 of the crankshaft, the moment elastic body 3 and the outside of the circuit board assembly 5, and the housing 8 is provided with at least one The internal circuit board assembly 5 communicates with the through hole 8A.

As shown in Fig. 2, Fig. 3 and Fig. 17, one end of the elastic body 3 abutting against the bending moment The handle shaft 1, the other end of the elastic body 3 subject to bending moment is placed against the strain sleeve 2, and the rear end of the strain sleeve 2 is engaged with the chain sleeve 4. When the crank shaft 1 drives the chain sleeve 4 to rotate, the crank shaft The rotational torque of 1 will cause the bending moment elastic body 3 between the abutting portion 1A of the crankshaft 1 and the abutting portion 2A of the strain sleeve 2 to deform, and the strain on the bending moment elastic body 3 will be sensed The sheet 3A transmits the deformation value of the moment elastic body 3 to the circuit board assembly to detect the change of torsion force.

In summary, the creation of this case can indeed and effectively produce the following practical benefits:

(1) It can indeed provide a bicycle bottom bracket torque detection mechanism with a simplified structure, low cost, light volume and accurate detection.

(2) A bicycle bottom bracket torque detection mechanism with substantial industrial applicability and high economic benefits can be provided.

1: Crankshaft

1A: offset part

2: Strain sleeve

2A: offset part

3: Bending moment elastic body

3A: Strain sensing sheet

8: shell

Claims (1)

A five-way torque detection mechanism for a bicycle, comprising: a crankshaft with a first accommodating area and a second accommodating area arranged on the shaft, a strain sleeve placed in series on the shaft rod in the first accommodating area of the crankshaft, at least An elastic body subject to bending moment, a chain disc sleeve placed in series on the crankshaft and driven to rotate by the crankshaft, and a circuit board assembly placed in series on the shaft rod in the second accommodation area of the crankshaft; it is characterized in that: A crankshaft, at least one abutting part protruding from the shaft is provided on the shaft of the first accommodating area of the crankshaft; at least one bending moment elastic body, the bending moment elastic body is abutted against The abutting portion protruding from the shaft rod in the first accommodation area of the crankshaft and a strain sleeve placed in series on the shaft rod in the first accommodation area of the crankshaft extend horizontally toward the direction of the abutting portion protruding from the crankshaft Between the abutment parts: a strain sleeve placed in series on the shaft rod in the first accommodation area of the crankshaft, the strain sleeve extends horizontally in the direction of the crankshaft protruding from the abutment part, and is equal to the crankshaft protruding setting The number of resisting parts is the resisting part, and the rear end of the strain sleeve is engaged with a chain disc sleeve driven by the crankshaft to rotate.

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