Novel air booster pump

Abstract

The utility model relates to a novel air booster pump, and belongs to the technical field of air booster pumps. Comprising an air cylinder, a connecting disc body and a hydraulic cylinder which are sequentially connected, an oil cup assembly is arranged above the hydraulic cylinder, a hollow plunger rod is arranged in the air cylinder, a main sealing O-shaped ring and a double-lip seal are arranged between the hollow plunger rod and the hydraulic cylinder, the main sealing O-shaped ring is of a 45-degree joint line structure, a connecting hole communicated with an inner cavity of the hydraulic cylinder is formed in the lower portion of the oil cup assembly, and the connecting disc body is arranged in the connecting hole. The connecting disc body is formed by punching a steel plate; the connecting disc body is changed from cast iron foundry casting to steel plate punch forming, traditional materials and processes are subverted, the machining efficiency is greatly improved, the manufacturing cost is reduced, and the recycling rate is increased; the hollow plunger rod is made of a hollow seamless steel tube material, so that the cost is reduced, the weight is reduced, the material characteristic is ultrahigh, the roughness is smooth, and the service life of a sealing part is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel air force pump belongs to air force pump technical field. BACKGROUND

[0002] The air force pump increases the braking force by increasing the air pressure, and is suitable for various demand scenes, especially occasions such as heavy engineering machinery that need high braking force. Because of its simple structure and fewer components, it is more flexible to control, can easily adjust the braking force, adapt to the braking demand under different road conditions, the pneumatic brake system reacts quickly and can provide strong braking force in a short time, improves the driving safety, and the pneumatic brake system performs stably in a high-temperature environment and does not fail like hydraulic brake due to boiling of brake fluid, further increasing the driving safety.

[0003] However, the distance between the guide point and the piston moving inside the cylinder of the existing air force pump is short, which reduces the service life of the sealing leather ring, the single connection point structure between the main brake cavity and the connecting disc body is prone to looseness and separation under high pressure, has high potential danger, is prone to catastrophic risk, and needs regular inspection and replacement of components, so the maintenance cost is high, therefore, it is necessary to design a novel air force pump. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a novel air force pump.

[0005] The utility model solves the technical scheme as follows:

[0006] A novel air force pump, including air cylinder, connecting disc body and hydraulic cylinder that connect in sequence, hydraulic cylinder top is equipped with oil cup assembly, the inside of air cylinder is equipped with hollow plunger rod, hollow plunger rod right -hand member is equipped with plunger rod plug, and the outside is equipped with return spring, hollow plunger rod and hydraulic cylinder between be equipped with the main sealing O type ring and double -lipped seal of 45 degree line structure of die combination, oil cup assembly below is equipped with the connecting hole that with hydraulic cylinder inner chamber is linked together, connecting disc body is the steel plate stamping forming.

[0007] Further, the left side of the main sealing O type ring and the right side of the double-lipped seal are both provided with a guide ring.

[0008] Further, the number of the main sealing O type ring is two.

[0009] Further, the front side of the air cylinder sealing leather ring is provided with a baffle plate.

[0010] Further, the oil cup assembly is provided with an oil valve sealing element below, and the oil valve sealing element is fluorine rubber material.

[0011] Further, the air cylinder is provided with an external breather at the oil cup assembly.

[0012] Further, the right side of the cylinder is provided with a built-in hidden respirator.

[0013] Further, the hydraulic cylinder is connected with the connecting disc body through the thickened nut.

[0014] The right side of the hydraulic cylinder is provided with an oil outlet joint.

[0015] Further, the hydraulic cylinder and the cylinder chamber are provided with a retreat stop nut and a fastening nut, and the connecting disc body and the hydraulic cylinder are provided with a positioning pin.

[0016] Further, the hydraulic cylinder and the connecting disc body are provided with a connecting positioning pin, and the hydraulic cylinder and the cylinder are provided with a fastening nut and a retreat stop nut.

[0017] Compared with the prior art, the beneficial effects of the utility model are that the connecting disc body is changed from cast iron sand casting to steel plate stamping forming, which overturns the traditional material and process, greatly improves the processing efficiency, reduces the manufacturing cost, and increases the recycling rate; the brake chamber changes the structure form of the conventional piston rubber sealing ring, adopts the plunger type extrusion exhaust principle, the hollow plunger rod adopts the structure form of hollow seamless steel pipe material, reduces the cost, reduces the weight, the weight reduction, the material characteristics and the smooth roughness, prolong the service life of the sealing part; by increasing the eave plate structure in front of the cylinder sealing ring assembly place, the risk of falling of the cylinder sealing part working slip is eliminated; the outer side of the hollow plunger rod is changed from the original single single-lip sealing point to double-lip sealing, which improves the sealing property and prolongs the service life by several times; the main sealing O-shaped ring is of 45-degree mold line structure, which increases the sealing property and prolongs the service life; the oil valve sealing part is changed from rubber material to fluorine rubber material, and the service life is improved by several times; by increasing two guide rings on the left side of the main sealing O-shaped ring and the right side of the double-lip sealing, the working life of the left side of the main sealing O-shaped ring and the double-lip sealing is prolonged, and the use effect is good; by the setting of the hollow plunger rod, the production cost is reduced, the overall weight is reduced, the self-weight, self-verticality and eccentric wear of the hollow plunger rod itself are reduced, and the service life of the part is improved; by setting the external respirator and the hidden respirator, different use environments can be adapted, the air circulation of the brake chamber is ensured, and the entry of dust and dirty gas is greatly reduced; by changing the material of the oil valve sealing part from rubber to fluorine rubber, the service life is improved by several times; the fastening nut and the retreat stop nut between the connecting disc body and the cylinder chamber are double-nut connected, and then the structure is fixed through the positioning pin, so that the loosening of the original structure single fastening nut due to vibration is eliminated, and the risk of fastening nut falling and failure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional view structural schematic diagram of the utility model.

[0019] Figure 2 For Figure 1 A partial enlarged view of the middle A part.

[0020] Figure 3 A side view of the present application.

[0021] In the figure, 1, cylinder; 11, baffle plate; 2, return spring; 3, hollow plunger rod; 31, plunger rod plug; 32, supporting guide ring; 33, main sealing O-ring; 34, double-lip seal; 4, connecting disc body; 41, external respirator; 42, hidden respirator; 43, positioning column pin; 44, fastening nut; 45, stop nut; 5, oil cup assembly; 51, oil valve sealing element; 6, hydraulic cylinder; 8, oil outlet joint. DETAILED DESCRIPTION

[0022] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are used to explain the present application and are not intended to limit the scope of the present application.

[0023] As Figures 1-3 shown, a novel air force pump, comprising a cylinder 1, a connecting disc body 4 and a hydraulic cylinder 6 connected in sequence, an oil cup assembly 5 is arranged above the hydraulic cylinder 6, a hollow plunger rod 3 is arranged inside the cylinder 1, a plunger rod plug 31 is arranged at the right end of the hollow plunger rod 3, a return spring 2 is arranged around the outside, a main sealing O-ring 33 and a double-lip seal 34 with a 45-degree mold line structure are arranged between the hollow plunger rod 3 and the hydraulic cylinder 6, a connecting hole is arranged below the oil cup assembly 5 and is in communication with the internal cavity of the hydraulic cylinder 6, and the connecting disc body 4 is formed by stamping a steel plate.

[0024] The left side of the main sealing O-ring 33 and the right side of the double-lip seal 34 are both provided with a supporting guide ring 32.

[0025] The number of the main sealing O-ring 33 is two.

[0026] The front side of the cylinder 1 sealing leather ring is provided with a baffle plate 11.

[0027] The oil cup assembly 5 is provided below with an oil valve sealing element 51, and the oil valve sealing element 51 is fluorine rubber.

[0028] The cylinder 1 is provided with an external respirator 41 at the oil cup assembly 5.

[0029] The right lower side of the cylinder 1 is provided with an internal hidden respirator 42.

[0030] The hydraulic cylinder 6 and the connecting disc body 4 are connected through a thickened nut.

[0031] The right side of the hydraulic cylinder 6 is provided with an oil outlet joint 8.

[0032] The hydraulic cylinder 6 is provided with a retreat nut 45 and a fastening nut 44 between the air chamber of the air cylinder 1, and the connecting disc body 4 is provided with a positioning pin 43 between the hydraulic cylinder 6.

[0033] When not braking, the hydraulic oil in the oil cup assembly 5 enters the brake chamber in the hydraulic cylinder 6 through the lower connecting hole under the control of the oil valve; when braking, compressed air enters the left side of the air cylinder 1 through the air inlet of the air force pump, drives the hollow plunger rod 3 to move rightward with the return spring 2 and the plunger rod plug 31, and at the same time, the brake fluid in the brake chamber in the hydraulic cylinder 6 generates high pressure to enter the brake cylinder through the oil outlet joint 8 to implement braking; during braking, the air in the air cylinder 1 is discharged through the external breather 41 or the hidden breather 42; when the brake pedal is released, the hollow plunger rod 3 and the plunger rod plug 31 quickly move leftward to reset under the action of the return spring 2, at this time, the brake fluid in the brake cylinder flows back to the brake chamber in the hydraulic cylinder 6 through the oil outlet joint 8, and if the brake fluid is too much, it can flow back to the oil cup in the oil cup assembly 5 through the connecting hole.

[0034] The connecting disc body 4 is changed from cast iron sand casting to steel plate stamping forming, which overturns the traditional material and process, greatly improves the processing efficiency, reduces the manufacturing cost, and increases the recycling rate; the brake chamber changes the structure form of the conventional piston rubber sealing ring, adopts the plunger type extrusion exhaust principle, the hollow plunger rod 3 adopts the structure form of hollow seamless steel pipe material, reduces the cost, and reduces the weight, the weight reduction, the super high material properties and the smooth roughness, prolongs the service life of the sealing part; by increasing the eave plate 11 structure at the front side of the cylinder 1 sealing ring assembly place, the risk of falling off in the working slip of the cylinder 1 sealing part is eliminated; the outer side of the hollow plunger rod 3 is changed from the original single single-lip sealing point to double-lip sealing 34, which improves the sealing performance and prolongs the service life by several times; the main sealing O-shaped ring 33 is in the structure form of 45-degree mold line, which increases the sealing performance and prolongs the service life; the oil valve sealing part 51 is changed from rubber material to fluorine rubber material, and the service life is improved by several times; by increasing two guide rings 32 on the left side of the main sealing O-shaped ring 33 and the right side of the double-lip sealing 34, the working life of the main sealing O-shaped ring 33 and the double-lip sealing 34 is prolonged, and the use effect is good; through the setting of the hollow plunger rod 3, the production cost is reduced, the overall weight is reduced, the self-weight, self-verticality and eccentric wear of the hollow plunger rod 3 itself are reduced, and the service life of the part is improved; by setting the external respirator 41 and the hidden respirator 42, different use environments can be adapted, while the air circulation of the brake chamber is ensured, and the entry of dust and dirty gas is greatly reduced; by changing the material of the oil valve sealing part 51 from rubber to fluorine rubber, the service life is improved by several times; the fastening nut 44 and the retreat stop nut 45 between the connecting disc body 4 and the air chamber body of the cylinder 1 are connected by double nuts, and then fixed by the positioning column pin 43 structure, which eliminates the loosening of the original single fastening nut 44 due to vibration, reduces the risk of falling off of the fastening nut 44.

[0035] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel air booster pump, comprising a cylinder (1), a connecting plate (4), and a hydraulic cylinder (6) connected in sequence, wherein an oil cup assembly (5) is provided above the hydraulic cylinder (6), characterized in that: The cylinder (1) is provided with a hollow plunger rod (3) inside. The right end of the hollow plunger rod (3) is provided with a plunger rod plug (31) and a return spring (2) is provided around the outside. The hollow plunger rod (3) and the hydraulic cylinder (6) are provided with a main sealing O-ring (33) and a double lip seal (34) with a 45-degree parting line structure. The oil cup assembly (5) is provided with a connecting hole below that communicates with the internal cavity of the hydraulic cylinder (6). The connecting plate (4) is formed by stamping steel plate.

2. The novel air booster pump according to claim 1, characterized in that: The main sealing O-ring (33) is provided with a guide ring (32) on the left side and the double lip seal (34) is provided with a guide ring (32) on the right side.

3. The novel air booster pump according to claim 2, characterized in that: The number of main sealing O-rings (33) is two.

4. The novel air booster pump according to claim 1, characterized in that: The cylinder (1) has a baffle plate (11) on the front side of the sealing ring.

5. The novel air booster pump according to claim 1, characterized in that: The oil cup assembly (5) is provided with an oil valve seal (51) below it, and the oil valve seal (51) is made of fluororubber.

6. The novel air booster pump according to claim 1, characterized in that: The cylinder (1) and oil cup assembly (5) are equipped with an external breather (41).

7. The novel air booster pump according to claim 1, characterized in that: The cylinder (1) is equipped with a built-in concealed respirator (42) on the lower right side.

8. The novel air booster pump according to claim 1, characterized in that: The hydraulic cylinder (6) is connected to the connecting disc (4) by a thickened nut.

9. The novel air booster pump according to claim 1, characterized in that: The hydraulic cylinder (6) is provided with an oil outlet connector (8) on its right side.

10. The novel air booster pump according to claim 1, characterized in that: The hydraulic cylinder (6) and the air chamber of the air cylinder (1) are provided with a backstop nut (45) and a fastening nut (44), and the connecting disc (4) and the hydraulic cylinder (6) are provided with a positioning pin (43).

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