Brake pump structure of tricycle

Abstract

The utility model provides a brake pump structure of a tricycle, and belongs to the technical field of brake pumps. The brake pump solves the problems that an existing brake pump structure with a single cylinder and double pistons is not suitable for a tricycle and the like. The hydraulic cylinder comprises a cylinder body, a first piston rod and a second piston rod, the first piston rod and the second piston rod are arranged in the cylinder body, an inner cavity of the cylinder body is divided into a first oil chamber and a second oil chamber in the length direction, the inner diameter of the second oil chamber is larger than that of the first oil chamber, the first piston rod is movably arranged in the first oil chamber, and the second piston rod is movably arranged in the second oil chamber. The utility model has the advantages that the inner diameter of the second oil chamber is larger than that of the first oil chamber, and the quantity of brake oil pushed out by the second oil chamber is larger than that of brake oil pushed out by the first oil chamber under the condition that the movement strokes of the first piston rod and the second piston rod are the same, so that the brake force of a rear wheel is larger than that of a front wheel; and rollover of the vehicle caused by too high braking strength of the front wheel is prevented, and an ideal braking effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of brake pumps and relates to a brake pump structure of a tricycle. Background Art

[0002] The brake system is a very important safety component in the vehicle equipment, which is directly related to the safety of vehicle driving. Nowadays, vehicles generally need to use a brake pump, which is connected to the brake caliper of the car. The brake oil output by the brake pump drives the brake caliper to move, and the brake caliper presses the friction plate and brake disc on the wheel to brake.

[0003] The existing brake pump needs to be configured with two cylinders in structure, and the two cylinders control the front wheel and rear wheel brakes respectively. However, the structure of the brake pump with two cylinders is relatively complex and will occupy a large volume. In order to solve this problem, a single-cylinder dual-piston brake pump structure is designed. Two connected piston rods divide the inner cavity of the cylinder into two independent oil chambers through a one-way leather cup, and control the brake oil of the two oil chambers to be output from the corresponding oil outlets respectively, which are used to control the front wheel and rear wheel brakes respectively. Since the inner diameter of the cylinder is the same relative to the two piston rods, the two brake oil volumes output by this single-cylinder dual-piston brake pump are the same, that is, the two brake forces used to control the front wheel and rear wheel are also the same.

[0004] However, since tricycles use the rear two wheels as driving wheels and the front wheels as sliding wheels, and the load is mainly on the rear two wheels, when the front braking strength is higher than the rear braking strength, it is easy for the front wheel to lose control and cause rollover due to excessive forward force. In addition, since the front wheel is usually not the key load-bearing point, if the front braking strength is too high, it is easy to cause damage to the front shock absorber, and in severe cases, it may also cause the forearm to break, resulting in serious safety consequences. Therefore, the ordinary single-cylinder double-piston brake pump structure is not suitable for tricycles. Utility Model Content

[0005] The utility model aims to solve the above problems existing in the brake pumps on existing three-way vehicles and proposes a brake pump structure in which two piston rods output different amounts of brake oil when the two piston rods have the same movement stroke in one cylinder.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A brake pump structure for a tricycle, comprising a cylinder body and a first piston rod and a second piston rod arranged in the cylinder body, characterized in that the inner cavity of the cylinder body is divided into a first oil chamber and a second oil chamber along its length direction, and the inner diameter of the second oil chamber is larger than the inner diameter of the first oil chamber, the first piston rod is movably arranged in the first oil chamber, and the second piston rod is movably arranged in the second oil chamber;

[0008] The first piston rod is sleeved with a one-way leather cup 1 and a one-way leather cup 2, the one-way leather cup 1 divides the first oil chamber into a first oil cavity and a first oil storage cavity, and the one-way leather cup is used to seal the first oil chamber; the second piston rod is sleeved with a one-way leather cup 3 and a one-way leather cup 4, the one-way leather cup 3 divides the second oil chamber into a second oil cavity and a second oil storage cavity, and the one-way leather cup 4 is used to seal the second oil chamber;

[0009] The cylinder body is also provided with a first oil outlet communicating with the first oil chamber, a second oil outlet communicating with the second oil chamber, a first oil inlet communicating with the first oil storage chamber, and a second oil inlet communicating with the second oil storage chamber.

[0010] In the above-mentioned brake pump structure of a tricycle, the brake pump further includes a push rod, which is fixedly connected to the second piston rod and is used to push the first piston rod and the second piston rod to translate.

[0011] In the above-mentioned brake pump structure for a tricycle, a first spring is provided between the first piston rod and the cylinder body.

[0012] In the above-mentioned brake pump structure of a tricycle, a pin is fixedly provided on the inner end of the second piston rod, and a spring seat is movably provided on the pin. The spring seat can translate relative to the pin and is fixedly connected to the first piston rod, and a second spring is provided between the spring seat and the second piston rod.

[0013] In the above-mentioned brake pump structure for a tricycle, a first spring washer is also sleeved on the first piston rod, one end of the first spring is pressed against the inner end surface of the cylinder body, and the other end is pressed against the first spring washer.

[0014] In the above-mentioned brake pump structure of a tricycle, a second spring washer is fixedly arranged between the pin shaft and the second piston rod, one end of the second spring is pressed against the spring seat, and the other end is pressed against the second spring washer.

[0015] In the above-mentioned brake pump structure of a tricycle, the one-way leather cup 1 can be blocked by the first spring washer to prevent the one-way leather cup 1 from escaping from the first piston rod.

[0016] In the above-mentioned brake pump structure of a tricycle, the one-way leather cup three can be blocked by the second spring washer to prevent the one-way leather cup three from escaping from the second piston rod.

[0017] In the above-mentioned brake pump structure of a tricycle, an oil inlet pipe joint is installed at each of the first oil inlet and the second oil inlet, and an oil inlet joint sealing ring is provided between the oil inlet pipe joint and the cylinder body.

[0018] In the above-mentioned brake pump structure of a tricycle, a limit pin is fixedly provided on the cylinder body, and the inner end of the limit pin extends into the inner cavity of the cylinder body. When the first piston rod translates back and forth along the inner cavity of the cylinder body, the first piston rod can be blocked by the limit pin, so as to limit the movement stroke of the first piston rod.

[0019] Compared with the prior art, the brake oil pushed out from the first oil outlet of the utility model is used to control the brake system of the front wheel, and the brake oil pushed out from the second oil outlet is used to control the brake system of the rear wheel. Since the inner diameter of the second oil chamber is larger than the inner diameter of the first oil chamber, when the movement stroke of the first piston rod and the second piston rod is the same, the amount of brake oil pushed out from the second oil chamber is larger than the amount of brake oil pushed out from the first oil chamber, so that the braking force of the rear wheel is greater than the braking force of the front wheel, preventing the vehicle from rolling over due to excessive braking strength of the front wheel, and achieving an ideal braking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of the piston rod of the brake pump of the utility model before compression;

[0021] Figure 2 It is a cross-sectional schematic diagram of the piston rod of the brake pump of the utility model after compression;

[0022] Figure 3 It is a structural schematic diagram of the cylinder body of the utility model;

[0023] Figure 4 is an enlarged cross-sectional view of the first piston rod of the utility model after compression;

[0024] Figure 5 It is an enlarged cross-sectional view of the second piston rod of the utility model after compression.

[0025] In the figure, 1, cylinder body; 2, first piston rod; 3, second piston rod; 6, one-way leather cup 1; 7, one-way leather cup 2; 8, first oil chamber; 9, first oil storage chamber; 10, one-way leather cup 3; 11, one-way leather cup 4; 12, second oil chamber; 13, second oil storage chamber; 14, first oil outlet; 15, second oil outlet; 16, first oil inlet; 17, second oil inlet; 18, push rod; 19, first spring; 20, pin; 21, spring seat; 22, second spring; 23, first spring gasket; 24, second spring gasket; 25, oil inlet pipe joint; 26, oil inlet joint sealing ring; 27, limit pin. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] like Figure 1 and Figure 2 As shown, a brake pump structure of a tricycle includes a cylinder body 1 and a first piston rod 2 and a second piston rod 3 disposed in the cylinder body 1. The inner cavity of the cylinder body 1 is divided into a first oil chamber and a second oil chamber along its length direction, and the inner diameter of the second oil chamber is larger than the inner diameter of the first oil chamber. The first piston rod 2 is movably disposed in the first oil chamber, and the second piston rod 3 is movably disposed in the second oil chamber. The brake pump also includes a push rod 18, which is fixedly connected to the second piston rod 3 and is used to push the first piston rod 2 and the second piston rod 3 to translate.

[0028] The first piston rod 2 is provided with a one-way leather cup 1 6 and a one-way leather cup 2 7, the one-way leather cup 1 6 divides the first oil chamber into a first oil chamber 8 and a first oil storage chamber 9, and the one-way leather cup is used to seal the first oil chamber; the second piston rod 3 is provided with a one-way leather cup 3 10 and a one-way leather cup 4 11, the one-way leather cup 3 10 divides the second oil chamber into a second oil chamber 12 and a second oil storage chamber 13, and the one-way leather cup 4 11 is used to seal the second oil chamber.

[0029] like Figure 3 As shown, the cylinder body 1 is also provided with a first oil outlet 14 communicating with the first oil chamber 8, a second oil outlet 15 communicating with the second oil chamber 12, a first oil inlet 16 communicating with the first oil storage chamber 9, and a second oil inlet 17 communicating with the second oil storage chamber 13. An oil inlet pipe joint 25 is installed at each of the first oil inlet 16 and the second oil inlet 17, and an oil inlet joint sealing ring 26 is provided between the oil inlet pipe joint 25 and the cylinder body 1.

[0030] like Figure 4 As shown, a first spring 19 is provided between the first piston rod 2 and the cylinder body 1. A first spring washer 23 is also sleeved on the first piston rod 2, one end of the first spring 19 is pressed against the inner end surface of the cylinder body 1, and the other end is pressed against the first spring washer 23. The one-way leather cup 16 can be blocked by the first spring washer 23 to prevent the one-way leather cup 16 from coming off the first piston rod 2.

[0031] like Figure 5 As shown, a pin 20 is fixedly provided at the inner end of the second piston rod 3, and a spring seat 21 is movably sleeved on the pin 20. The spring seat 21 can translate relative to the pin 20 and is fixedly connected to the first piston rod 2. A second spring 22 is provided between the spring seat 21 and the second piston rod 3. A second spring washer 24 is also fixedly provided between the pin 20 and the second piston rod 3, and one end of the second spring 22 is pressed against the spring seat 21, and the other end is pressed against the second spring washer 24. The one-way leather cup 3 10 can be blocked by the second spring washer 24 to prevent the one-way leather cup 3 10 from coming off the second piston rod 3.

[0032] like Figure 4As shown, a limit pin 27 is fixedly provided on the cylinder body 1, and the inner end of the limit pin 27 extends into the inner cavity of the cylinder body 1. When the first piston rod 2 translates back and forth along the inner cavity of the cylinder body 1, the first piston rod 2 can be blocked by the limit pin 27 to limit the movement stroke of the first piston rod 2.

[0033] The brake working principle of the utility model is as follows:

[0034] The first oil chamber 8 and the second oil chamber 12 are both filled with brake oil. When the push rod 18 pushes the first piston rod 2 and the second piston rod 3 to translate, the volume of the first oil chamber 8 and the second oil chamber 12 decreases, and the brake oil in the first oil chamber 8 and the second oil chamber 12 is output from the first oil outlet 14 and the second oil outlet 15 respectively. The brake oil is transmitted to the brake caliper through the oil pipe, so that the brake caliper is actuated to brake.

[0035] When the volume of the first oil chamber 8 is reduced, negative pressure is generated in the first oil chamber 8, and the brake oil in the first oil storage chamber 9 passes over the one-way leather cup 16 and enters the first oil chamber 8, and new brake oil enters the first oil storage chamber 9 through the first oil inlet 16 for oil replenishment; at the same time, when the volume of the second oil chamber 12 is reduced, negative pressure is generated in the second oil chamber 12, and the brake oil in the second oil storage chamber 13 passes over the one-way leather cup 3 10 and enters the second oil chamber 12, and new brake oil enters the second oil storage chamber 13 through the second oil inlet 17 for oil replenishment; the first spring 19 pushes the first piston rod 2 and the second piston rod 3 to translate and reset.

[0036] It should be understood that in the claims and description of the utility model, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A brake pump structure for a tricycle, comprising a cylinder body (1) and a first piston rod (2) and a second piston rod (3) arranged in the cylinder body (1), characterized in that: The inner cavity of the cylinder body (1) is divided into a first oil chamber and a second oil chamber along its length direction, and the inner diameter of the second oil chamber is larger than the inner diameter of the first oil chamber. The first piston rod (2) is movably arranged in the first oil chamber, and the second piston rod (3) is movably arranged in the second oil chamber. The first piston rod (2) is provided with a one-way leather cup 1 (6) and a one-way leather cup 2 (7), the one-way leather cup 1 (6) divides the first oil chamber into a first oil cavity (8) and a first oil storage cavity (9), and the one-way leather cup is used to seal the first oil chamber; the second piston rod (3) is provided with a one-way leather cup 3 (10) and a one-way leather cup 4 (11), the one-way leather cup 3 (10) divides the second oil chamber into a second oil cavity (12) and a second oil storage cavity (13), and the one-way leather cup 4 (11) is used to seal the second oil chamber; The cylinder body (1) is also provided with a first oil outlet (14) communicating with the first oil chamber (8), a second oil outlet (15) communicating with the second oil chamber (12), a first oil inlet (16) communicating with the first oil storage chamber (9), and a second oil inlet (17) communicating with the second oil storage chamber (13).

2. A brake pump structure for a tricycle according to claim 1, characterized in that: The brake pump further comprises a push rod (18), which is fixedly connected to the second piston rod (3) and is used to push the first piston rod (2) and the second piston rod (3) to move in translation.

3. A brake pump structure for a tricycle according to claim 1, characterized in that: A first spring (19) is provided between the first piston rod (2) and the cylinder body (1).

4. A brake pump structure for a tricycle according to claim 1, characterized in that: A pin shaft (20) is fixedly provided at the inner end portion of the second piston rod (3), a spring seat (21) is movably sleeved on the pin shaft (20), the spring seat (21) can translate relative to the pin shaft (20) and is fixedly connected to the first piston rod (2), and a second spring (22) is provided between the spring seat (21) and the second piston rod (3).

5. The brake pump structure of a tricycle according to claim 3, characterized in that: The first piston rod (2) is also sleeved with a first spring washer (23); one end of the first spring (19) is pressed against the inner end surface of the cylinder body (1), and the other end is pressed against the first spring washer (23).

6. A brake pump structure for a tricycle according to claim 4, characterized in that: A second spring washer (24) is also fixedly arranged between the pin shaft (20) and the second piston rod (3); one end of the second spring (22) is pressed against the spring seat (21), and the other end is pressed against the second spring washer (24).

7. A brake pump structure for a tricycle according to claim 5, characterized in that: The one-way leather cup 1 (6) can be blocked by the first spring washer (23) to prevent the one-way leather cup 1 (6) from falling off the first piston rod (2).

8. The brake pump structure of a tricycle according to claim 6, characterized in that: The one-way leather cup three (10) can be blocked by the second spring washer (24) to prevent the one-way leather cup three (10) from falling off the second piston rod (3).

9. The brake pump structure of a tricycle according to claim 1, characterized in that: An oil inlet pipe joint (25) is installed at each of the first oil inlet (16) and the second oil inlet (17), and an oil inlet joint sealing ring (26) is provided between the oil inlet pipe joint (25) and the cylinder body (1).

10. The brake pump structure of a tricycle according to claim 1, characterized in that: A limit pin (27) is fixedly provided on the cylinder body (1), and the inner end of the limit pin (27) extends into the inner cavity of the cylinder body (1). When the first piston rod (2) moves back and forth along the inner cavity of the cylinder body (1), the first piston rod (2) can be blocked by the limit pin (27), so as to limit the movement stroke of the first piston rod (2).

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