Brake booster pump

Abstract

A brake booster pump is composed of a pump body assembly, a piston assembly and a guide sleeve assembly. The pump body assembly is composed of a pump body, an oil outlet, a screw plug, a spring I, a steel ball I, an oil inlet connector and an elastic inner check ring. The plunger assembly is composed of a plunger head, a plunger rod, an adjusting screw, a spring II and a piston assembly. The piston assembly is composed of a reversing piston, a piston, an inner plunger, a tower-shaped spring, a steel ball II and a sealing ring. When the plunger head moves in the A direction, the steel ball II is pushed to move in the A direction, the tower-shaped spring is compressed, brake fluid enters the oil cavity IV, and the oil cavity III and the oil cavity IV are pressurized at the same time; meanwhile, when the inner plunger moves leftwards, the steel ball I is pushed to move upwards; when the pressure is continuously increased, the steel ball II is pushed to move leftwards, the reversing piston moves leftwards, and the brake fluid enters the brake device; when the plunger assemblies of the two sets of pumps move towards the A direction, the oil cavities IV of the two sets of pumps are communicated, and the pressure of the two sets of pumps is balanced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, and in particular to the field of hydraulic braking. Background Technology

[0002] Tractor brake pumps generally use a plunger-type structure, which results in relatively little brake pump power, making it difficult for operators to brake. Summary of the Invention

[0003] The present invention is to design a new type of brake pump that provides greater braking force, reduces operator workload, and ensures safety.

[0004] A brake booster pump comprises a pump body assembly (1), a piston assembly (2), and a guide sleeve assembly (3). The guide sleeve assembly is fitted around the outer circumference of the left end of the piston assembly, and both the guide sleeve assembly and the piston assembly are installed in holes within the pump body assembly. The pump body assembly consists of a pump body (1-1), an oil outlet (1-2), a screw plug (1-3), a spring I (1-4), a steel ball I (1-5), an oil inlet connector (1-6), and an elastic inner retaining ring (1-7). The pump body has a hole in the middle that mates with the piston, an internal thread on the right side that mates with the oil outlet connector, and a thread on the left side that mates with the guide sleeve connector. The hole for fitting the sleeve has a groove for installing an elastic inner retaining ring and the elastic inner retaining ring is installed there; there is a screw hole on the upper left side of the pump body, the screw hole is screwed into the oil inlet connector, the external thread at the lower part of the oil storage tank I is connected to the internal thread on the oil inlet connector, the hole in the middle of the oil inlet connector is connected to the hole in the middle of the pump body through hole A and hole B; there is a screw hole on the upper right side of the pump body, the screw hole is fitted with a screw plug (1-3) and a steel ball I (1-5), there is a hole in the lower middle part of the screw plug, the hole is fitted with a spring I (1-4), the spring I presses against the steel ball I; the piston assembly (2) consists of a plunger head (2-1), a plunger rod (2-2), and an adjusting screw (2- 3) Composed of spring II (2-4) and plunger (2-5), the plunger head has an O-ring in the groove, which is screwed into the threaded hole of the plunger rod. The adjusting screw is screwed into the threaded hole of the plunger rod, and spring II is fitted on the right end of the adjusting screw. The external thread of the left end of the piston assembly has an O-ring fitted on the shoulder and screwed into the threaded hole of the right end of the plunger rod. Spring II fitted on the right end of the adjusting screw is fitted on the cylindrical head of the right end of the adjusting screw and the left end of the reversing piston, respectively. The plunger consists of reversing piston (2-5-1), piston (2-5-2), inner plunger (2-5-3), and tower spring (2-5-4). The piston is composed of a steel ball II (2-5-5) and a sealing ring. The sealing ring is fitted on the outer circle of the piston. The steel ball II and the tower-shaped spring are installed in the reversing piston hole. Both the left and right ends of the piston have external threads. The hollow left end of the inner plunger has an internal thread and a radial hole D. The internal thread in the inner plunger is tightened on the external thread on the right end of the piston. The reversing piston and the radial hole on the piston are used for oil passage. The guide sleeve assembly is composed of a guide sleeve (3-1), a dust ring (3-2), and a support ring (3-3). The dust ring and the support ring are installed in the guide sleeve groove. O-rings (not marked in the figure) are installed in both the inner and outer grooves of the guide sleeve. Attached Figure Description

[0005] Figure 1 This is the front view of the utility model.

[0006] In the figure, there is a pump body assembly (1), a piston assembly (2), and a guide sleeve assembly (3);

[0007] Figure 2 This is a front view of the pump body assembly (1) in this utility model.

[0008] In the figure, there is a pump body (1-1), an oil outlet (1-2), a screw plug (1-3), a spring I (1-4), a steel ball I (1-5), an oil inlet connector (1-6), and an elastic inner retaining ring (1-7). The oil reservoir I injects brake fluid into the oil chambers II and III through holes A and B on the pump body assembly (1). The oil chambers III and IV are connected through the small hole D and the radial clearance. The screw plug of the pump body has a transverse hole and an annular groove. The screw plug has a radial groove. When the steel ball moves upward, the brake fluid of the two sets of brake pumps is connected.

[0009] Figure 3 This is a front view of the plunger assembly (2) of this utility model.

[0010] In the figure, an O-ring is installed in the groove on the plunger head (2-1) and screwed into the screw hole of the plunger rod (2-2). The adjusting screw (2-3) is screwed into the screw hole of the plunger rod (2-2). The right end of the adjusting screw is fitted with spring II (2-4). The external thread on the left end of the plunger (2-5) is fitted with an O-ring at the shoulder and screwed into the screw hole on the right end of the plunger rod. The right end of the adjusting screw is fitted with spring II (2-4), which is fitted onto the right end of the adjusting screw and the cylindrical head on the left end of the reversing piston (2-5-1).

[0011] Figure 4 This is a cross-sectional view of the plunger (2-5).

[0012] In the diagram, the reversing piston (2-5-1), piston (2-5-2), inner plunger (2-5-3), tower spring (2-5-4), steel ball II (2-5-5), and sealing ring (2-5-6) are shown. The inner plunger (2-5-3) has radial holes D. All parts that need to prevent leakage are equipped with sealing rings (this is basic common knowledge for technicians, and the numbers are not marked in the diagram).

[0013] Figure 5 This is a cross-sectional view of the guide sleeve assembly (3).

[0014] In the diagram, the guide sleeve (3-1), dustproof ring (3-2), and support ring (3-3) are all fitted with O-ring seals in both the inner and outer grooves (not numbered in the diagram). Detailed Implementation

[0015] A brake booster pump comprises a pump body assembly (1), a piston assembly (2), and a guide sleeve assembly (3). The guide sleeve assembly is fitted around the outer circumference of the left end of the piston assembly, and both the guide sleeve assembly and the piston assembly are installed in holes within the pump body assembly. The pump body assembly consists of a pump body, an oil outlet, a screw plug, a spring I, a steel ball I, an oil inlet connector, and an elastic inner retaining ring. The pump body has a hole in the middle that mates with the piston, an internal thread on the right side that mates with the oil outlet connector, and a thread on the left side that mates with the guide sleeve. The pump body has a slot for installing an elastic inner retaining ring; a screw hole is located on the upper left side of the pump body, into which the oil inlet connector is screwed; the external thread at the bottom of the oil reservoir I connects with the internal thread on the oil inlet connector; the hole in the middle of the oil inlet connector communicates with the hole in the middle of the pump body through holes A and B; a screw hole is located on the upper right side of the pump body, into which a screw plug and a steel ball I are installed; a hole is located in the lower middle part of the screw plug, into which a spring I is installed, and the spring I presses against the steel ball I; the piston assembly consists of a plunger head, a plunger rod, an adjusting screw, and a spring. The piston assembly consists of a spring II and a plunger. An O-ring seal is fitted into a groove on the plunger head and screwed into the threaded hole of the plunger rod. An adjusting screw is screwed into the threaded hole of the plunger rod, and a spring II is fitted onto the right end of the adjusting screw. An O-ring seal is fitted onto the shoulder of the external thread on the left end of the piston assembly and screwed into the threaded hole on the right end of the plunger rod. The spring II fitted onto the right end of the adjusting screw is fitted onto the cylindrical head on the right end of the adjusting screw and the left end of the reversing piston. The plunger consists of a reversing piston, a piston, an inner plunger, a tower-shaped spring, a steel ball II, and a sealing ring. The piston assembly consists of a sealing ring fitted on the outer circumference of the piston, steel ball II and tower-shaped spring installed in the reversing piston bore, external threads on both the left and right ends of the piston, an internal thread and a radial small hole D on the hollow left end of the inner plunger, the internal thread of the inner plunger being tightened onto the external thread on the right end of the piston, and a reversing piston and a radial hole on the piston for oil passage; the guide sleeve assembly consists of a guide sleeve, a dust seal and a support ring, the dust seal and the support ring being installed in the guide sleeve groove, and O-ring seals (not numbered in the figure) installed in both the inner and outer grooves of the guide sleeve.

[0016] The work process is as follows:

[0017] (1) First, fill the oil reservoir with brake fluid. The brake fluid flows into oil chamber II and oil chamber III through the inlet connector and the small holes A and B on the pump body.

[0018] (2) When the plunger head moves in direction A under the action of force, it pushes the steel ball II to move in direction A, compresses the tower spring, and the brake fluid enters the oil chamber IV. The oil chambers III and IV are pressurized at the same time. At the same time, when the inner plunger moves to the left, it pushes the steel ball I to move upward.

[0019] (3) When the plunger head moves in direction A under the action of force, the pressure increases, pushing the steel ball II to move to the left, the reversing piston moves to the left, and the brake fluid enters the braking device;

[0020] (4) The left hole of the reversing piston is connected to oil chamber II, the pressure reaches the limit value, and the pressure is maintained;

[0021] (5) Remove the braking force in direction A and reset the brake booster pump.

[0022] The braking force is adjusted by adjusting the screw via spring I. When there is one valve group, when both the plunger assembly and piston assembly of the first valve group move in direction A, the one-way valve on the upper part of the other valve body closes. When both the plunger assembly and piston assembly of the second valve group move in direction A, the steel balls I of the two pumps move upward. Through the transverse hole at the screw plug, the oil chambers IV of the two pumps are connected, ensuring the pressure balance of the two pumps.

Claims

1. A brake booster pump, comprising a pump body assembly (1), a piston assembly (2), and a guide sleeve assembly (3), characterized in that, The guide sleeve assembly is fitted onto the outer circumference of the left end of the piston assembly. Both the guide sleeve assembly and the piston assembly are installed in the holes of the pump body assembly. The pump body assembly consists of a pump body (1-1), an oil outlet (1-2), a screw plug (1-3), a spring I (1-4), a steel ball I (1-5), an oil inlet connector (1-6), and an elastic inner retaining ring (1-7). The pump body has a hole in the middle that mates with the piston, an internal thread on the right side that mates with the oil outlet connector, and a hole on the left side that mates with the guide sleeve. It also has a groove for installing the elastic inner retaining ring. The upper left side of the pump body... The pump body has a screw hole, which is screwed into the oil inlet connector. The external thread at the bottom of the oil storage tank I is connected to the internal thread on the oil inlet connector. The hole in the middle of the oil inlet connector is connected to the hole in the middle of the pump body through holes A and B. The upper right side of the pump body has a screw hole, in which a screw plug (1-3) and a steel ball I (1-5) are installed. The lower middle part of the screw plug has a hole, in which a spring I (1-4) is installed. The spring I presses against the steel ball I. The piston assembly (2) consists of a plunger head (2-1), a plunger rod (2-2), an adjusting screw (2-3), a spring II (2-4), and a plunger (2-5). The piston assembly consists of a plunger head with an O-ring in the groove, screwed into the threaded hole of the plunger rod. An adjusting screw is also screwed into the threaded hole of the plunger rod. A spring II is fitted onto the right end of the adjusting screw. An O-ring is fitted onto the shoulder of the external thread on the left end of the piston assembly and screwed into the threaded hole on the right end of the plunger rod. The spring II fitted onto the right end of the adjusting screw is fitted onto the cylindrical head on the right end of the adjusting screw and the left end of the reversing piston. The plunger (2-5) comprises a reversing piston (2-5-1), a piston (2-5-2), an inner plunger (2-5-3), and a tower-shaped spring (2-5-4). The piston is composed of a steel ball II (2-5-5) and a sealing ring. The sealing ring is fitted on the outer circle of the piston. The steel ball II and the tower-shaped spring are installed in the reversing piston hole. Both the left and right ends of the piston have external threads. The hollow left end of the inner plunger has an internal thread and a radial hole D. The internal thread in the inner plunger is tightened onto the external thread on the right end of the piston. The reversing piston and the radial hole on the piston are used for oil passage. The guide sleeve assembly is composed of a guide sleeve (3-1), a dust ring (3-2), and a support ring (3-3). The dust ring and the support ring are installed in the guide sleeve groove. O-rings are installed in both the inner and outer grooves of the guide sleeve.

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