Exhaust control system of scissor type aerial work platform brake system

Abstract

The utility model relates to the technical field of engineering machinery, and discloses an exhaust control system of a scissor type aerial work platform braking system, which comprises a manual pump and two brakes, the brakes are used for parking braking of an aerial work platform, the manual pump is provided with a main oil port and two oil outlets, and the two oil outlets are communicated with the main oil port. The manual pump is further provided with two auxiliary oil inlets and an exhaust port. The auxiliary oil inlet is communicated with the exhaust port, and the exhaust port is provided with an oil plug; the brake is provided with two oil release ports, one oil outlet of the manual pump is connected with one oil release port of the brake through a pipeline A, and the other oil release port of the brake is connected with one auxiliary oil inlet of the manual pump through a pipeline B. The exhaust hole is formed in the brake pump and is not limited by operation space, system exhaust can be facilitated, and the problem that a brake cannot be released under the emergency condition due to the fact that an existing brake system is difficult to exhaust and does not exhaust is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an exhaust control system of a scissor-type aerial work platform braking system. Background Art

[0002] The scissor-type aerial work platform is a special equipment for aerial work, which has the advantages of stable structure, safe performance and wide application range. With the rapid development of domestic scissor-type aerial work platforms, the requirements for equipment are getting higher and higher. In traditional scissor-type aerial work platforms, the braking system is usually a closed system. When the vehicle breaks down and the hydraulic system cannot operate, the operator can use a manual pump to pressurize the brake oil to release the brake and push the equipment to the maintenance station for repair. The brake system of the existing hydraulically driven scissor-type lifting platform is as shown in the attached manual. Figure 3 As shown, the brake system primarily consists of a hand pump 10 and two brakes 20. The hand pump has a main oil port A connected to the system oil circuit, and two oil outlets C1 and C2. The brakes 20 have two release ports. One of these ports, B, is connected to the hand pump outlets C1 and C2, respectively, via a pipe. The other port, B1, is fitted with an oil plug. However, due to the awkward location of the oil plug on the brake and the limited access space, the OEM failed to remove and bleed the oil plug during the initial installation and commissioning of the equipment. This resulted in a large amount of air being pushed into the brake system piping, forming an air mass. Due to the closed circuit, the air mass remained in the brake system piping for a long time, making it difficult to expel. As a result, after the equipment had been idle for a period of time, the hand pump was unable to build pressure, rendering its emergency brake release function ineffective. Utility Model Content

[0003] The purpose of the utility model is to provide an exhaust control system for the braking system of a scissor-type aerial work platform. By arranging the exhaust hole on the brake pump, it is not restricted by the operating space and can facilitate the exhaust of the system, thereby solving the problem that the existing braking system cannot release the brake in an emergency situation due to the difficulty in exhausting.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] An exhaust control system for a scissor-type aerial work platform brake system includes a manual pump and two brakes. The brakes are used for parking brakes on the aerial work platform. The manual pump is provided with a main oil port and two oil outlets. The manual pump is also provided with two auxiliary oil inlets and an exhaust port. The auxiliary oil inlet is communicated with the exhaust port, and the exhaust port is provided with an oil plug.

[0006] The brake is provided with two oil release ports, one of the oil outlets of the manual pump is connected to one of the oil release ports of the brake through pipeline A, and the other oil release port of the brake is connected to one of the auxiliary oil inlets of the manual pump through pipeline B.

[0007] The utility model is further configured such that the release oil ports of the brakes are communicated with each other.

[0008] The utility model is further configured as follows: the mouth of the exhaust port is formed with an internal thread;

[0009] The oil plug is screwed onto the internal thread.

[0010] The utility model is further configured as follows: a sealing ring is sleeved on the oil plug, and the sealing ring is abutted against the tapered hole at the mouth of the exhaust port.

[0011] The outstanding effects of the utility model are:

[0012] Compared with the existing technology, by setting the exhaust hole on the brake pump, it is not restricted by the operating space, which makes it convenient to exhaust the system, solving the problem that the existing brake system cannot release the brake in an emergency due to difficulty in exhausting. There is almost no pollution caused by leakage of hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 About the cross-sectional view of AA;

[0015] Figure 3 The figure is a schematic diagram of a brake system of a scissor lift platform in the prior art.

[0016] Reference numerals: 10, manual pump; 101, main oil port; 102, oil outlet; 103, auxiliary oil inlet; 104, exhaust port;

[0017] 20. Brake; 201. Release oil port;

[0018] 30. Oil blockage; 31. Sealing ring. DETAILED DESCRIPTION

[0019] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] The following references Figures 1 to 2 The following describes the embodiments of the present invention:

[0021] An exhaust control system for a scissor-type aerial work platform brake system includes a manual pump 10 and two brakes 20. The brakes are used for parking the aerial work platform. The manual pump 10 is provided with a main oil port 101 and two oil outlets 102. The manual pump 10 is also provided with two auxiliary oil inlets 103 and an exhaust port 104. The auxiliary oil inlets 103 are connected to the exhaust ports 104, and the exhaust ports 104 are provided with oil plugs 30. The exhaust ports 104 are formed with internal threads, and the oil plugs 30 are screwed onto the internal threads. The oil plugs 30 are removable. A sealing ring 31 is sleeved on the oil plug 30, which abuts against the tapered hole at the mouth of the exhaust ports 104 to improve sealing and prevent oil leakage.

[0022] The brake 20 is provided with two oil release ports 201, and the two oil release ports 201 of the brake 20 are arranged in communication with each other;

[0023] One of the oil outlets 102 of the manual pump 10 is connected to one of the oil release ports 201 of the brake 20 via a pipeline A40 , and the other oil release port 201 of the brake 20 is connected to one of the auxiliary oil inlets 103 of the manual pump 10 via a pipeline B41 .

[0024] Exhaust method:

[0025] When the scissor-type aerial work platform equipment is assembled and rolled off the production line.

[0026] First, remove the oil plug on the exhaust port of the manual pump 10, install an external oil pipe, operate the equipment system, and discharge the air in the brake system together with the hydraulic oil into the container.

[0027] Second, the hydraulic oil of the main system of the scissor-type aerial work platform enters the manual pump 10 from the main oil inlet 101 of the manual pump.

[0028] Third, the hydraulic oil flows through the internal channel of the manual pump from the two oil outlets 102 of the manual pump and the pipeline A to one of the release oil ports 201 of the brake and enters the inner cavity of the brake.

[0029] Fourth, the hydraulic oil flows out from another release oil port through the internal channel of the brake and enters the auxiliary oil inlet 103 through the pipeline B.

[0030] Fifth, the hydraulic oil in the two auxiliary oil inlets enters the exhaust port and is discharged into the container through the external oil pipe until the hydraulic oil discharged from the pipeline does not contain air.

[0031] Sixth, reinstall the oil plug on the exhaust port of the manual pump to complete the exhaust work.

[0032] When the scissor lift equipment fails, the main system cannot supply oil to the brake system.

[0033] By pressing the handle of the manual pump, the manual pump sucks the hydraulic oil in the main system from the main oil port A into the inside of the manual pump; the manual pump pumps the hydraulic oil sucked into the manual pump into the brake cavity through the oil outlet and oil pipe A, releasing the brake.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications based on the above assumptions should also be regarded as within the scope of protection of the present invention.

Claims

1. An exhaust control system for a scissor-type aerial work platform brake system, comprising a manual pump (10) and two brakes (20), wherein the manual pump (10) is provided with a main oil port (101) and two oil outlets (102), and is characterized in that: The manual pump (10) is further provided with two auxiliary oil inlets (103) and an exhaust port (104); the auxiliary oil inlet (103) and the exhaust port (104) are communicated with each other, and the exhaust port (104) is provided with an oil plug (30); The brake (20) is provided with two oil release ports (201), one of the oil outlets (102) of the manual pump (10) is connected to one of the oil release ports (201) of the brake (20) via a pipeline A (40), and the other oil release port (201) of the brake (20) is connected to one of the auxiliary oil inlets (103) of the manual pump (10) via a pipeline B (41).

2. The exhaust control system of the braking system of a scissor-type aerial work platform according to claim 1, characterized in that: The release oil ports (201) of the brakes (20) are arranged in communication with each other.

3. The exhaust control system of the braking system of a scissor-type aerial work platform according to claim 1, characterized in that: The mouth of the exhaust port (104) is formed with an internal thread; The oil plug (30) is screwed onto the internal thread.

4. The exhaust control system of the braking system of a scissor-type aerial work platform according to claim 1, characterized in that: A sealing ring (31) is sleeved on the oil plug (30), and the sealing ring (31) is abutted against the tapered hole at the mouth of the exhaust port (104).

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