CN1118318A - Braking devices for two-wheeled motor vehicles - Google Patents

Abstract

The braking device for a two-wheeled motor vehicle in which the front and rear wheels can move in unison, and the braking mechanism can prevent changes in the braking force distribution characteristics even under the conditions of changes in the degree of wear of the friction parts and the friction coefficient between the wheels and the ground. Change.

_The operating force distribution mechanism ₂₈₁ can distribute the operating force applied to the brake operating member _26L to the rear wheel brake mechanism _BR and the front wheel brake mechanism _BF . At a predetermined value, the lock mechanism ₂₉₁ prevents the operation force distribution mechanism ₂₈₁ from transmitting the operation force to the front wheel brake mechanism _BF .

Description

Braking devices for two-wheeled motor vehicles

The present invention relates to a braking device for a two-wheeled motor vehicle, in particular to a braking device for a two-wheeled motor vehicle capable of distributing the operating force of a brake member to a rear wheel braking mechanism and a front wheel braking mechanism.

According to publications such as Mikai Hei 4-7972, etc., conventional related devices are known.

In the above-mentioned existing device, when the operating force of the brake member does not reach the predetermined value, the transmission of the operating force to the rear wheel brake mechanism is blocked. Once the operating force exceeds the predetermined value, the corresponding operating force will be transmitted to the rear wheel braking mechanism. On the rear wheel brake mechanism, there is a braking force distribution characteristic close to the ideal distribution characteristic. However, the relationship between the operating force and the braking force changes with the degree of friction of the friction parts in the braking mechanism and the friction coefficient between the wheel and the ground, and the existing device determines the direction of the operating force according to the magnitude of the operating force. If the rear wheel brake mechanism transmits or blocks, this may cause a phenomenon that deviates from the distribution characteristics.

In view of this, an object of the present invention is to provide a braking device for a two-wheeled vehicle that prevents deviation from the braking force distribution characteristic.

In order to achieve the above object, the two-wheel motor vehicle brake device of the present invention is characterized by having the following mechanisms: a brake member; a rear wheel brake mechanism for braking the rear wheels; a front wheel brake mechanism for braking the front wheels; Distribute the operating force applied to the brake parts to the operating force distribution mechanism of the rear wheel braking mechanism and the front wheel braking mechanism; when the braking force of the rear wheel braking mechanism does not reach the set value, block the operation force distribution mechanism A locking mechanism that transmits the operating force to the front wheel brake mechanism, and when the braking force of the rear wheel brake mechanism exceeds a predetermined value, the operating force distribution mechanism transmits the operating force to the front wheel operating mechanism.

In addition, the present invention also has a locking mechanism, and when the braking force of the rear wheel braking mechanism exceeds a predetermined value, the locking mechanism also transmits the braking force to the front wheel braking mechanism as the braking force of the rear wheel braking mechanism increases. operating force increases.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view of a two-wheeled motor vehicle equipped with a braking device according to a first embodiment.

Fig. 2 is an overall structural diagram of the braking device.

Fig. 3 is a vertical sectional view of the control box.

FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3. FIG.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3. FIG.

Figure 6 is a cross-sectional view taken along line 6-6 of Figure 3 .

Fig. 7 is an explanatory diagram of the operation of the braking device.

Fig. 8 is a characteristic diagram of braking force distribution.

Fig. 9 is a diagram showing the overall configuration of the braking device of the second embodiment.

Fig. 10 is a diagram showing the overall configuration of the braking device of the third embodiment.

In the figure, 26 _L is the left brake handle as a brake operating part; 28 ₁ , 28 ₂ , 28 ₃ are operating force distribution mechanisms; 29 ₁ , 29 ₂ , 29 ₃ are _locking mechanisms; B _R is the drum brake used as the rear wheel brake mechanism; W _F ... the front wheel; W _R ... the rear wheel.

1 to 8 show a first embodiment of the present invention. Fig. 1 is a plan view of a two-wheeled motor vehicle equipped with a braking device, Fig. 2 is an overall structural diagram of the braking device, Fig. 3 is a vertical sectional view of the control box, Fig. 4 is a sectional view along line 4-4 in Fig. 3, Fig. 5 is a cross-sectional view along line 5-5 in Fig. 3, Fig. 6 is a cross-sectional view along line 6-6 in Fig. 3, Fig. 7 is an explanatory diagram of the function of the braking device, and Fig. 8 is a characteristic diagram of braking force distribution.

First of all, in Fig. 1 and Fig. 2, the disc brake B _F as the front wheel brake mechanism is installed on the front wheel W _F of the two-wheeled motor vehicle V, and the disc brake B _F is equipped with a brake caliper 11 integrated The master cylinder 12 is used to form a braking force using the hydraulic pressure of the master cylinder 12 generated by the operating force applied to the brake arm 13 of the master cylinder 12 .

Drum brakes B _R are mounted on rear wheels W _R of the two-wheeled vehicle V as a rear wheel braking mechanism. The drum brake B _R is equipped with the following components: a brake drum 15 supported on the axle 14 of the rear wheel W _R ; A pair of brake shoes 18, 18 that are frictionally engaged on the inner peripheral surface; a pair of springs 19, 19 that apply force in the direction that the two brake shoes 18, 18 are mutually or approaching; can make the two brake shoes 18, 18 press A cam 20 pivotally supported on the brake plate 16 toward the inner peripheral surface of the brake drum 15 ; And the brake plate 16 is not fixed on the vehicle body as usual, but is supported on the brake drum 15, and is designed as one with the connecting arm 46. Between the connecting arm 46 and the support portion 24 fixed on the vehicle body side, the return spring 22 is compressed. When the operating force from the brake cam arm 21 brakes the drum brake _BR , the drum brake B Once the braking force of _R exceeds the set value, the brake plate 16, that is, the connecting arm 46, is dragged away by the rotation of the rear wheel _WR , and turns back to the counterclockwise direction shown in Fig. 2 while compressing the back-moving spring 22.

The left end of the steering handle 25 is equipped with a left brake handle 26 _L as a brake operating member, and the right end of the steering handle 25 is equipped with a right brake handle 26 _R . The left brake handle 26 _L first makes the drum brake B _R act during the braking operation, and the disc brake B _F also starts to do interlocking action as soon as the braking force provided by the drum brake B _R exceeds a predetermined value. In addition, the right brake handle 26 _R first makes the disc brake B _F act during the braking operation, and when the brake operation force of the right brake handle 26 _R exceeds a predetermined value, the drum brake B _R also starts to perform interlocking action. .

A control box 27 is fixedly arranged at the connecting portion between the middle part of the steering handle 25 and the steering sleeve not shown in the figure, and an operating force distribution mechanism 28 is housed in the control box 27. The operating force of the lever _26L is distributed to the drum brake _BR and the disc brake _BF , and the operating force of the right brake lever _26R can be distributed to the disc brake _BF and the drum brake _BR . The control box 27 also houses a part of the locking mechanism 29 ₁ , which can prevent the operating force distribution mechanism 28 ₁ from distributing the operating force when the left brake handle _26L is operated _.

Referring to Fig. 3, Fig. 4, Fig. 5 and Fig. 6 at the same time, the operating force distribution mechanism ₂₈₁ has the following components: a rectangular guide member 30 that can move left and right within a limited range and is supported on the control box 27; The first and second sprockets 31, 32 that can rotate along the same axis; the first chain 33 that winds around the first sprocket 31; the second chain 34 that winds around the second sprocket 32; The bottom of 30 is located at the first idler wheel 35 that is freely rotatably supported on the left side of the control box 27, and the aforementioned first chain 33 is hung on the idler wheel 35; The 2nd idler pulley 36 supported freely rotatably, the 2nd chain 34 mentioned above is hung on this idler pulley 36.

On the inner surface of the top of the control box 27, there are a pair of guide grooves 37, 37 extending left and right and oppositely arranged. Thus, the guide member 30 can move left and right within the range defined by the two guide grooves 37 , 37 .

A support shaft 38 is fixed to a middle portion in the left-right direction of the guide member, and the first and second sprockets are rotatably attached to the support shaft 38 so as to be adjacent to each other.

A brake cable 39 whose one end is connected to the left brake handle 26 _L can move freely through the upper part of the left end of the control box 27 , and the other end of the brake cable 39 is connected to one end of the first chain 33 . And the 1st chain 33 passes and goes around on the right half circle of the 2nd sprocket wheel 31, and then around the 1/4 circle on the left side top of the 1st idler wheel 35, then extends downwards. The other end of the first chain 33 is connected to one end of the brake cable 40, the brake cable 40 can freely move through the lower end of the control box 27, and the other end is connected to the brake cam of the drum brake _BR . The arms 21 are connected.

A brake cable 41 whose one end is connected to the right brake handle 26 _R can move freely through the upper right side of the control box 27 , and the other end of the brake cable 41 is connected to one end of the second chain 34 . And the 2nd chain 34 passes and goes around on the left side of the 2nd sprocket wheel 32 about half circle, and then around the right side upper part of the 2nd idler 36 about 1/4 circle, then extends downwards. The other end of the second chain 34 is connected to one end of the brake cable 42, the brake cable 42 can freely move through the lower end of the control box 27, and the other end is connected to the brake arm of the disc brake _BF 13 phase connections.

The locking mechanism ₂₉₁ has an engaging rod 44 and a cable 45. The above-mentioned engaging rod 44 is supported on the shaft 43 of the first idler 35, so that the engaging rod 44 can freely rotate in the middle part of the control box 27, and one end thereof can be engaged. At the engagement groove 30a provided at the left end of the guide member 30; the above-mentioned cable 45 is in the middle of the brake cables 40, 42, and can freely move through the lower end of the control box 27, while one end of it is connected to the other end of the engagement rod 44. One end is connected, and the other end of the cable 45 is connected with the connecting arm 46, so that when the drum brake _BR sends out a braking force exceeding a predetermined value, the connecting arm 46 compresses the return spring 22 and moves, and is moved by the connecting port arm. The movement relieves the tension on the cable 45 .

On the other hand, between the right end portion of the guide member 30 and the control box 27, a guide return spring 47 is provided in compression, which tends to press the guide member 30 to the left.

When the braking force of the drum brake _BR does not reach a predetermined value, the cable 45 is in a tensioned state, and in this state, since one end of the engagement rod 44 is engaged in the engagement groove 30a of the guide member 30, the guide return spring 47 is The leftward movement of the left pushing guide part 30 is stopped by the engagement rod 44. At this moment, the state of the guide part 30 is in the position slightly in the middle of the left and right directions of the guide grooves 37, 37. And when the braking force of the drum brake _BR exceeds the predetermined value, the connecting arm 46 will move in the direction shown by the arrow 23 in Fig. The direction of engagement with the engagement groove 30a is reversed, so that the guide member 30 can move leftward when the guide member 30 is subjected to a force in the leftward direction.

The function of the first embodiment will be described below. As shown in FIG. 7, in the state where the right brake handle 26 _R is not operated, an operating force is applied to the left brake handle 26 _L , and the operating force brakes from the left. 26 _L is transmitted to the brake cable 39, and is transmitted to the brake cam arm 21 of the drum brake _BR through the first chain 33 and the brake cable 40, so that the drum brake _BR sends a braking force. At this time, since the locking mechanism 29 ₁ prevents the guide member 30 from moving to the left, it prevents the operating force distribution mechanism 28 ₁ from distributing the operating force, and there is no input of operating force at the disc brake _BF .

And when being applied to the operating force on the left brake handle 26 _L to increase, when the drum brake _BR sends the braking force exceeding the predetermined value, the connecting arm 26 turns to the direction of the arrow 23, the locking mechanism ₂₉₁ releases the locked state, and the guide member 30 is allowed to move to the left, therefore, by the traction of the brake cable 39 connected to the left brake handle 26 _L , the guide member 30 moves to the left, thus pulling the brake cable 42 to drive the disc brake to brake operate.

That is, as shown in Figure 8, when the braking force of the rear wheel _WR does not reach the predetermined value, the braking force of the front wheel _WF will not be issued, and once the braking force of the rear wheel _WR exceeds the predetermined value, the front wheel W _F is also linked to generate power, and when the braking force of the rear wheel _WR exceeds a predetermined value, the operating force transmitted to the disc brake _BF increases with the increase of the braking force of the rear wheel _WR . Therefore, the braking force distribution characteristic close to the ideal distribution characteristic shown in the graph of Fig. 8 can be obtained. And, the point P at which the front wheel _WF starts to send out the braking force due to linkage _{is determined according to the braking force of the rear wheel WR .} The friction coefficient between W _R and the ground is changed, and the braking force distribution characteristic close to the ideal distribution characteristic can also be obtained.

In addition, in the state where the left brake handle 26 _L is not operated, when an operating force is applied to the right brake handle 26 _R , the operating force is transmitted from the right brake handle 26 _R to the brake cable 41, and then passes through the second brake handle 26 R. 2. The chain 34 and the brake cable 42 are transmitted to the brake arm 13 of the disc brake _BF , so that the disc brake _BF emits a braking force. At this time, when the operating force transmitted from the right brake handle 26 _R is greater than the setting load of the guide return spring 47, the guide member 30 will compress the guide return spring 47 and move to the right side of FIG. Under the action of the traction force of the brake cable 40, the drum brake _BR sends out a braking force, and is in a front-rear linkage braking state.

Further, when the left brake lever _26L and the right brake lever _26R are simultaneously operated, the drum brake _BR and the disc brake _BF respectively exert their braking forces corresponding to the respective applied operating forces.

And in the middle part of left and right brake handle 26 _L , 26 _R , be installed on the main body control box 27 and accommodate a part of components of operating force distribution mechanism 28 ₁ and locking mechanism 29 ₁ , so when assembling the braking device The installation is easy, and the assembly work links can also be reduced. In addition, the brake cables 39, 41 connected to the left and right brake handles _26L , _26R are linearly inserted from the left and right sides of the control box 27, and the brake cables connected to the disc brake _BF 42. The brake cable 40 connected to the drum brake _BR and the component cable 45 of the locking mechanism ₂₉₁ are all drawn out from the lower part of the control box 27, which avoids excessive bending of the cables, so the handling is simple and the performance is improved. And reliability is also better.

FIG. 9 shows the second embodiment of the present invention, and the parts corresponding to the above-mentioned first embodiment use the same reference numerals.

One end of the brake cable 48 is connected to the left brake handle _26L as a brake operating part, the other end is connected to the brake cam arm 21 of the rear wheel drum brake _BR , and one end of the brake cable 49 is connected to the right brake lever. The handle 26 _R is connected with the brake arm 13 located at the front wheel disc brake _BF at the other end.

The brake operating force applied to the left brake handle 26 _L is transmitted to the drum brake B _R through the brake cable 48, but due to the action of the operating force distribution mechanism ₂₈₂ , it can also be transmitted to the disc brake B _F. Distribution of the operating force by the operating force distribution mechanism ₂₈₂ is prevented by the locking mechanism ₂₉₂ when the braking force of the drum brake _BR does not reach a predetermined value.

The operating force distribution mechanism ₂₈₂ has the following parts: a first balancer 50, on which the center of the brake cable 48 connected to the left brake handle _26L is wound; a second balancer 51, connected to the right brake handle 26L; The middle of the brake cable 49 connected with _{the R} phase is wound thereon; it is connected to the connection part 52 between the two balancers 50 and 51 . The first balancer 50 is made up of the following components: the first pulley 53 in the middle of the above-mentioned brake cable 48 is wound around it; The second balancer 51 is made up of the following components: the second pulley 56 in the middle of the above-mentioned brake cable 49 is wound around it, and the second spring 58 that is stretched and arranged between the second fixed support part 57 . And on the first pulley 53 of the first balancer 50, an end of the first connection cable 59 is connected, and its effect is to generate traction when the first pulley 53 moves to the side away from the first fixed support part 54, and the first connection The other end of the cable 59 is connected to the connection member 52 . In addition, the other end of the second connection cable 60 is connected to the second pulley 56 of the second balancer 51 , and one end thereof is connected to the connection and one end thereof is connected to the connection member 52 . One end of the second connecting cable 60 is connected to the connecting member 52 from the other side in the opposite direction to the connecting cable 59, and the other end of the second connecting cable 60 is connected to the second pulley 56, so that when the first pulley 53 moves away from the first fixed support portion 54 side and when the first connecting cable 59 and the connecting member 52 act on the second connecting cable 60 as a traction force, it will overcome the elastic force of the second spring 58 and make the second pulley 56 move toward The second fixed support portion 57 approaches.

The locking mechanism ₂₉₂ is composed of the following parts: a guide cylinder 61 fixed at a fixed position, and a connecting part 52 is accommodated in the guide cylinder 61, and the connecting part 52 can move within a limited range; The return spring 62 that is compressed between the connection parts 52, the spring pushes the connection part 52 so that the first connection cable 59 connected between the first pulley 53 and the connection part 52 is tensioned; the cable 45, one end of which is connected to The second connecting cable 60 is connected to the connecting member 52 in the same direction, and the other end is connected to the connecting arm 46 of the drum brake _BR .

In the second embodiment, when an operating force is applied to the left brake lever 26 _L while the right brake lever 26 _R is not operated, the operating force transmitted from the left brake lever 26 _L to the brake cable 48 The braking force will be transmitted to the brake cam arm 21 of the drum brake _BR to make the drum brake _BR send braking force. At this time, the locking mechanism ₂₉₂ prevents the connecting member 52 in the operating mechanism ₂₈₂ from moving to the left, so the operating force distribution mechanism ₂₈₂ is prevented from distributing the operating force, and the operating force cannot apply force to the disc brake _BF .

As the operating force applied to the left brake handle _26L increases, once the drum brake sends out a braking force exceeding a predetermined value, the connecting arm 46 will rotate in the direction of the arrow 23, and the locking mechanism ₂₉₂ will release its locked state, and the connecting arm 46 will The parts can move to the left, so the first pulley 53 on which the brake cable 48 connected with the left brake handle 26 _L leaves the first fixed support part 54, and the connecting part 52 is pulled by the first connecting cable 59 Move to the left. The movement of the connection member 52 is transmitted to the second balancer 51 through the second connection cable 60, so that the second pulley 56 moves to the side close to the second fixed support part 57, thereby pulling the brake cable 49, The disc brake is also linked to produce braking action.

In addition, when the operation force is applied to the right brake handle _26R in the state where the left brake handle _26L is not operated, the connecting member 52 is in a state of being in contact with the right end of the guide cylinder 61 as shown in FIG. Movement on the right side is restricted. Therefore, the operation force distribution mechanism ₂₈₂ does not perform the operation force distribution function, and only the disc brakes _BF generate braking force.

FIG. 10 shows the third embodiment of the present invention, and the corresponding parts of the above-mentioned embodiments use the same reference numerals.

The operating force distribution mechanism ₂₈₃ has a balancer 64, one end of the brake cable 63 is connected to the left brake handle _26L , and the other end is connected to the balancer 64; 65, one end of the brake cable 65 is provided with a joint 65a, and the other end of the brake cable 65 is connected to the brake cam arm 21 of the rear wheel drum brake. In addition, the other end of the brake cable 66 connected to the right brake lever _26R is provided with a coupling member 66a. On the other hand, on the brake arm 13' of the front wheel disc brake _BF , a pair of arc-shaped joint grooves 67, 68 centered on the fulcrum of the brake arm 13' are provided. 67, 68 are combined with the aforementioned respective coupling pieces 65a, 66a. Thus, the two brake cables 65, 66 are connected to the brake arm 13', so that no matter which cable is pulled, the braking operation of the brake arm 13' will not affect the other.

The structure of the locking mechanism ₂₉₃ is as follows: one end of the cable 69 is connected to the connecting arm 46 of the rear drum brake _BR , and the other end is connected to the cable 65 between the balancer 64 and the brake arm 13'.

According to the third embodiment, when the operating force is applied to the left brake handle 26 _L in the state where the right brake handle 26 _R is not operated, the brake cable 63 pulls the balancer 64, and the drum brake _BR When the braking force has not reached the predetermined value, due to the action of the locking mechanism ₂₉₃ , the middle portion of the brake cable 65 between the balancer 64 and the brake arm 13' is fixed, so that the balancer 64 moves, the brake cable 65 sends out the tension that makes the brake arm 21 perform the braking operation, thus the drum brake sends out the braking force, and no operating force is transmitted to the disc brake.

When the operating force of the left brake handle 26 _L increases and the drum brake _BR sends out a braking force exceeding a predetermined value, the locking mechanism ₂₉₃ releases the fixing of the middle position of the brake cable 65, and the balancer The movement of the brake cable 64 causes the brake cable 65 to send a pulling force, so that the disc brake _BF also produces a braking operation in conjunction.

In addition, when the left brake lever 26 _L is not operated, an operating force is applied to the right brake lever 26 _R , and the operating force is transmitted only to the disc brake B _F through the brake cable 66 .

The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments, and various design changes of the present invention described in the scope of the claims are all possible.

For example, the front wheel brake mechanism can also be a drum brake, and the brake operating member can also be a brake pedal.

In summary, the braking device for a two-wheeled motor vehicle of the present invention has the following components: a brake operating member; a rear wheel braking mechanism for braking a rear wheel; a front wheel braking mechanism for braking a front wheel; The operating force on the rear wheel brake mechanism is distributed to the operating force distribution mechanism of the front wheel brake mechanism; the locking mechanism blocks the operating force when the braking force of the rear wheel brake mechanism does not reach a predetermined value. The distribution mechanism transmits the operating force to the front wheel braking mechanism, and once the braking force of the rear wheel braking mechanism exceeds the set value, the operating force distribution mechanism can transmit the operating force to the front wheel braking mechanism accordingly; The linkage point between the rear wheel brake mechanism and the front wheel brake mechanism is determined according to the braking force of the wheel brake mechanism, so that even if there is a deviation in the friction coefficient that is a component of the rear wheel brake mechanism and the friction coefficient of the ground contact surface of the rear wheel, the Deviations in braking force distribution characteristics can be prevented.

In addition, according to the invention described in claim 2, in addition to the configuration of the invention described in claim 1 above, the lock mechanism is accompanied by the rear wheel brake mechanism when the braking force of the rear wheel brake mechanism exceeds a predetermined value. As the braking force increases, the operating force transmitted to the front wheel braking mechanism will increase, so the braking force distribution characteristic close to the ideal distribution characteristic can be obtained.

Claims (2)

1. two-wheeled vehicle brake equipment is characterized in that this braking puts dress and comprise: braking operation piece (26 _L); Braking rear-wheel (W _R) trailing wheel stop mechanism (B _R); Braking front-wheel (W _F) (B of front wheel brake mechanism _F); Can braking operation piece (26 will be imposed on _L) operating effort distribute to trailing wheel stop mechanism (B _R) and (B of front-wheel system mechanism _F) operating effort distributor gears (28 ₁, 28 ₂, 28 ₃); Lockout mechanism (29 ₁, 29 ₂, 29 ₃), this lockout mechanism is at trailing wheel stop mechanism (B _R) braking force do not reach institute's definite value state down blocking-up by operating effort distributor gears (28 ₁, 28 ₂, 28 ₃) to front-wheel stop mechanism (B _F) transmit operating effort, and as trailing wheel stop mechanism (B _R) braking force when surpassing institute's definite value, can be by operating effort distributor gears (28 ₁, 28 ₂, 28 ₃) to front-wheel stop mechanism (B _F) the transmission operating effort.

2. the two-wheeled vehicle brake equipment of putting down in writing as claim 1 is characterized in that: lockout mechanism (29 ₁, 29 ₂, 29 ₃) at trailing wheel stop mechanism (B _R) braking force exceed under the state of institute's definite value, be accompanied by trailing wheel stop mechanism (B _R) braking force increase, make to pass to (the B of front wheel brake mechanism _F) operating effort also increase.

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