CN201002598Y - hydraulic brake mechanism - Google Patents

Abstract

A hydraulic brake mechanism is characterized by comprising a brake master cylinder, wherein the brake master cylinder comprises a cylinder body, a plunger, a first one-way leather cup, a second one-way leather cup and a third one-way leather cup. The cylinder body contains brake oil and is provided with an oil storage space, a plunger space and a main pump oil outlet which are communicated. A plunger is movably disposed within the plunger space. The first one-way packing cup, the second one-way packing cup and the third one-way packing cup are all arranged on the plunger, the third one-way packing cup is close to the oil outlet of the master pump, and the direction of the third packing cup is opposite to that of the first one-way packing cup and the second one-way packing cup. When the brake caliper of the hydraulic brake mechanism is vibrated, the second one-way leather cup prevents the brake oil in the brake caliper from flowing to the brake master cylinder. The utility model discloses when the brake calliper of hydraulic braking mechanism receives the vibration, because blockking of the one-way leather cup of second, can prevent the brake oil flow direction brake master cylinder in the brake calliper, solved handle and plunger and made the problem that the stroke increases because of the high environment that shakes.

Description

hydraulic brake mechanism

technical field

The utility model relates to a hydraulic brake mechanism, in particular to a master brake cylinder and a hydraulic brake mechanism suitable for high-vibration environments.

Background technique

Please refer to FIG. 1, which shows a conventional hydraulic brake mechanism. Wherein, the hydraulic brake mechanism includes a brake master cylinder 1 , a brake caliper 3 , and a brake oil pipe 2 . The brake oil pipe 2 is connected with the brake master cylinder 1 and the brake calipers 3 .

Please refer to FIG. 2 at the same time. FIG. 2 shows the internal structure of the dotted area A of the hydraulic brake mechanism in FIG. 1 . Wherein, the cylinder body 12 of the brake master cylinder 1 has a plunger space for the plunger 13 to move therein. The plunger space can be divided into a first subspace 122 and a second subspace 123 . The first subspace 122 communicates with the oil storage space 121 through the first passage 129 , the oil storage space 121 communicates with the second subspace 123 through the second passage 128 , and the second subspace 123 communicates with the brake oil pipe 2 through the master cylinder oil outlet 125 connected, the first one-way leather cup 14 and the second one-way leather cup 15 are installed on the plunger 13, the space generated by the two leather cups and the cylinder body 12 is the first subspace 122, and the second one-way leather cup 15 is located between Between the first channel 129 and the second channel 128 . The function of the one-way cup is similar to that of a one-way valve, which only allows the brake oil to flow in one direction. For example, the second one-way cup 15 can allow the brake fluid in the first subspace 122 to flow to the second subspace 123 due to pressure changes, but the brake fluid in the second subspace 123 cannot flow directly to the first subspace 122 . One end of the plunger 13 is in contact with the abutting portion 111 of the handle 11, while a spring 19 is installed at the other end, and the spring 19 is abutted between the plunger 13 and the cylinder body 12 for pushing the plunger 13 toward the abutting portion 111. direction push.

When braking, the user grasps the handle 11, and the contact portion 111 of the handle 11 will push the plunger 13, as shown in FIG. , the brake oil in the second subspace 123 is sent to the brake caliper 3 through the master cylinder oil outlet 125 and the brake oil pipe 2, and the piston 32 and the brake pad 33 in the brake caliper 3 are pushed to clamp the rotating brake disc 4 , resulting in a braking action.

When the brake is terminated, the user releases the handle 11, and the contact portion 111 of the handle 11 and the plunger 13 return to the pre-actuation position by the elastic force of the spring 19 (that is, in FIG. 2 , the brake pad 33 is slightly pushed by the rotation deflection of the brake disc 4 The piston 32 and excess brake oil flow back to the oil storage space 121 through the brake oil pipe 2, the oil outlet 125 of the master cylinder, the second subspace 123, and the second channel 128 to terminate the braking action.

However, when the brake caliper 3 is working in a high-vibration environment, the brake pad 33 will hit the piston 32 due to inertial vibration, so that the piston 32 will press the brake oil back into the oil storage space 121. If the brake is used at this time, the brake master cylinder 1 will It is necessary to supply more brake fluid to the brake caliper 3 to produce a braking action, thus causing the problem of increasing the actuating stroke of the handle 11 and the plunger 13 .

Utility model content

In view of this, the purpose of the present invention is to provide a hydraulic brake mechanism to solve the problem that the actuating stroke of the handle and the plunger increases when the brake caliper of the hydraulic brake mechanism is vibrated.

In order to achieve the above object, the hydraulic brake mechanism of the present utility model is characterized in that it has a brake master cylinder, which includes a cylinder block, a plunger, a first one-way leather cup, a second one-way leather cup, And a third one-way leather cup. Brake oil is contained in the cylinder body, and the cylinder body has an oil storage space, a plunger space, and a master pump oil outlet connected to each other. The plunger is movably arranged in the plunger space. The first one-way cup, the second one-way cup, and the third one-way cup are all set on the plunger, the third one-way cup is close to the oil outlet of the master pump, and the third one-way cup is set in the same direction as the first one-way cup. 1. The second one-way cup is opposite. The first, second, and third one-way cups are set in such a way that the brake fluid between the first and second one-way cups can pass through the second one-way cup. Flow between the second and third one-way cups, but the brake fluid between the second and third one-way cups cannot flow to the first and second one-way cups through the second one-way cup between bowls.

The utility model has the advantage that when the brake caliper of the hydraulic brake mechanism is vibrated, the brake oil in the brake caliper can be prevented from flowing to the brake master cylinder due to the blocking of the second one-way cup, thus solving the problem caused by the high vibration of the handle and the plunger. The problem that the operating stroke increases due to the environment.

Description of drawings

Figure 1 shows a known hydraulic brake mechanism;

Fig. 2 shows the internal structure of the dotted line area A of the hydraulic braking mechanism of Fig. 1;

Fig. 3 is a schematic diagram of the actuation of a conventional hydraulic brake mechanism;

Fig. 4 is a schematic diagram of the first embodiment of the hydraulic brake mechanism according to the present invention;

Fig. 5 is a schematic diagram of the actuation of the hydraulic brake mechanism in Fig. 4;

Fig. 6 is an action diagram when the brake pads of the hydraulic brake mechanism of Fig. 4 are worn;

Fig. 7 is a schematic diagram of the state when the brake pads of the hydraulic brake mechanism of Fig. 4 are replaced;

8 is a schematic diagram of a second embodiment of the hydraulic brake mechanism according to the present invention;

Fig. 9 is a schematic diagram of the actuation of the hydraulic brake mechanism in Fig. 8;

Fig. 10 is an action diagram when the brake pads of the hydraulic brake mechanism of Fig. 8 are worn;

FIG. 11 is a schematic view of the state of the hydraulic brake mechanism in FIG. 8 when the brake pads are replaced.

Symbol Description

1. 1'～brake master cylinder

11～handle

111～resistance department

12, 12’, 12”～Cylinder body

120～slope area

121～Oil storage space

122～the first subspace

123, 123'～the second subspace

124～third subspace

125～Oil outlet of master pump

126～the fourth channel

127～the third channel

128～Second channel

129～the first channel

13, 13'～Plunger

14～The first one-way leather cup

15～Second one-way leather cup

16~The third one-way cup

18～stopper

19, 19'～spring

2 ~ brake oil pipe

3～brake calipers

32～piston

33～brake pads

4～brake disc

A～Dotted line area

Detailed ways

First embodiment:

Please refer to FIG. 4 , where the same parts as those in the prior art are given the same numbers and descriptions are omitted. In this embodiment, the structures of the plunger 13' and the cylinder body 12' are changed. In the plunger 13' part, a third one-way cup 16 is added between the second one-way cup 15 and the spring 19', and the direction of the third one-way cup 16 is the same as that of the first one-way cup 14 and the second one-way cup. In contrast to the one-way leather cup 15 , the space generated by the second one-way leather cup 15 , the third one-way leather cup 16 and the cylinder body 12 ′ is the third subspace 124 . In the cylinder body 12', the first channel 129 and the second channel 128 are located between the first one-way leather cup 14 and the second one-way leather cup 15. A fourth channel 126 and a third channel 127 are newly added between the second subspace 123' and the master pump oil outlet 125.

As shown in Fig. 5, when braking, the pushing part 111 of the handle 11 pushes the plunger 13', and the second one-way cup 15 pushes the brake oil in the third subspace 124, because the third subspace 124 is a closed space at this time , so that the second subspace 123 ′ brake oil flows to the brake caliper 3 through the fourth channel 126 or the third channel 127 to generate a braking action.

When the brake is terminated, the handle 11 and the plunger 13' are returned to the pre-actuation position by the elastic force of the spring 19', as shown in Figure 4. At this time, because the third one-way leather cup 16 has a backstop function, the brake in the third subspace 124 The oil cannot flow to the second sub-space 123 ′, so the second sub-space 123 ′ generates negative pressure to forcibly suck the brake oil back from the brake caliper 3 , so that the brake caliper 3 releases the brake.

If the brake caliper 3 works in a high-vibration environment, due to the blocking of the second one-way cup 15, the brake oil of the brake caliper 3 cannot be returned due to the knocking of the brake pad 33, and the handle 11 and the plunger 13' due to high The problem that the vibration environment increases the actuating stroke.

If the brake pad 33 wears after use, when braking, as shown in Figure 6, the third one-way cup 16 will pass through the fourth passage 126, and the brake oil in the third subspace 124 will flow to the main body through the fourth passage 126. The pump oil outlet 125 supplements the moving space of the piston 32 caused by the abrasion of the brake pad 33 . When the brake is terminated, the handle 11 and the plunger 13' are returned to the pre-actuation position by the elastic force of the spring 19'. Since the third subspace 124 communicates with the master pump oil outlet 125 through the fourth passage 126, the first subspace 122 The brake oil will flow to the third subspace 124 through the second one-way cup 15 due to the pressure difference. When the third one-way cup 16 passes through the fourth channel 126, the third subspace 124 returns to the original closed space, so that The second subspace 123 ′ generates negative pressure to forcibly suck the brake oil back from the brake caliper 3 , so that the brake caliper 3 releases the brake.

After using for a period of time, if you need to replace the brake pads, as shown in Figure 7, remove the handle 11, and the plunger 13' is pushed to the stopper 18 by the elastic force of the spring 19', and the stopper 18 is installed on the column of the cylinder body 12' The port of the plug space is used to prevent the plunger 13' from detaching from the cylinder 12'. At this time, the second one-way leather cup 15 passes through the second passage 128, so that the third subspace 124 is kept unimpeded with the oil storage space 121 through the second passage 128, and the brake oil of the brake caliper 3 is discharged from the brake oil pipe 2 and the master cylinder. The mouth 125, the third channel 127 or the fourth channel 126, the second subspace 123', the third one-way cup 16, the third subspace 124, and the second channel 128 flow back to the oil storage space 121, so that the brake pad 33 can Replace with a new one.

Second embodiment:

Please refer to FIG. 8 , where the parts that are the same as those in the first embodiment are given the same reference numerals and descriptions are omitted. In this embodiment, the above-mentioned fourth passage 126 and third passage 127 are abolished, and the master pump oil outlet 125 directly connects with the second subspace 123 ′, and connects with the second subspace at the end of the movable range of the third subspace 124 ′. A beveled area 120 is added at the junction of the space 123', so that the plunger spaces have different diameters.

When braking, as shown in Fig. 9, the pushing part 111 of the handle 11 pushes the plunger 13' and the second one-way cup 15 pushes the brake oil in the third subspace 124. Since the third subspace 124 is a closed space at this time, The brake fluid in the second subspace 123' flows to the brake caliper 3 through the oil outlet 125 of the master cylinder to generate a braking action.

When the brake is terminated, the handle 11 and the plunger 13' are returned to the pre-actuated position by the elastic force of the spring 19'. At this time, due to the obstruction of the third one-way cup 16, the brake fluid in the third subspace 124 cannot flow to the second subspace 123 ', so the second subspace 123' generates a negative pressure, forcing the brake fluid to be sucked back from the brake caliper 3, so that the brake caliper 3 releases the brake.

If the brake caliper 3 works in a high-vibration environment, due to the blocking of the second one-way cup 15, the brake oil of the brake caliper 3 cannot be returned due to the knocking of the brake pad 33, and the handle 11 and the plunger 13' due to high The problem that the vibration environment increases the actuating stroke.

If the brake pad 33 wears after use, when braking, as shown in Figure 10, the third one-way cup 16 will pass through the slope area 120, and the brake oil in the third subspace 124 will flow to the master pump through the slope area 120. The oil port 125 supplements the movement space of the piston 32 caused by the abrasion of the brake pad 33 . When the brake is terminated, the handle 11 and the plunger 13' are returned to the pre-actuated position by the elastic force of the spring 19'. Since the third subspace 124 communicates with the oil outlet 125 of the master pump due to the slope area 120, the first subspace 122 brakes at this time. The oil will flow to the third subspace 124 through the second one-way cup 15 due to the pressure difference. When the third one-way cup 16 passes through the slope area 120, the third subspace 124 returns to the original airtight space, making the second The subspace 123 ′ generates negative pressure to forcibly suck the brake oil back from the brake caliper 3 , so that the brake caliper 3 releases the brake.

After using for a period of time, if the brake pad needs to be replaced, as shown in Figure 11, the handle 11 is removed, and the plunger 13' is pushed to the stopper 18 by the elastic force of the spring 19', and the stopper 18 is installed on the cylinder body 12", Used to prevent the plunger 13' from breaking away from the cylinder 12". At this time, the second one-way leather cup 15 passes through the second passage 128, so that the third subspace 124 is kept unimpeded with the oil storage space 121 through the second passage 128, and the brake oil of the brake caliper 3 is discharged from the brake oil pipe 2 and the master cylinder. The port 125, the second subspace 123', the third one-way cup 16, the third subspace 124, and the second channel 128 flow back into the oil storage space 121, so that the brake pads 33 can be replaced with new ones.

Claims (5)

1. a Hydraulic brake mechanism is characterized in that having a master cylinder brake, and this master cylinder brake comprises:

One cylinder body includes Brake fluid, and this cylinder body has an oil storage space, a plunger space and a master cylinder oil outlet of connection;

One plunger movably is arranged in this plunger space;

One first unidirectional leather cup is arranged on this plunger;

One second unidirectional leather cup is arranged on this plunger;

One the 3rd unidirectional leather cup, be arranged on this plunger and close this master cylinder oil outlet, it is opposite that the 3rd leather cup is provided with first, second unidirectional leather cup of direction and this, the direction that is provided with of this first, second, third unidirectional leather cup can flow between this second, third unidirectional leather cup the Brake fluid between this first, second unidirectional leather cup via this second unidirectional leather cup, but the Brake fluid between this second, third unidirectional leather cup can't flow between this first, second unidirectional leather cup via this second unidirectional leather cup.

2. Hydraulic brake according to claim 1 mechanism, it is characterized in that this cylinder body has more a first passage, one second letter passage, a third channel and a four-way, this first, second passage connects this oil storage space and this plunger space, and the 3rd, four-way connects this plunger space and this master cylinder oil outlet.

3. Hydraulic brake according to claim 1 mechanism is characterized in that this cylinder body has more a chamfered region and makes this plunger space have different diameters.

4. Hydraulic brake according to claim 1 mechanism is characterized in that more comprising that a spring is resisted against between this plunger and this cylinder body.

5. Hydraulic brake according to claim 1 mechanism is characterized in that more comprising a stop part, is arranged at the port of this plunger space, breaks away from this plunger space to prevent this plunger.

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