Structure of a hydraulic brake master cylinder for an agricultural harvester
A technology of hydraulic braking and harvesting machine, which is applied in the direction of hydraulic braking transmission device, etc., which can solve the problems of small turning radius, large force required for quick piston reset, large brake pedal force, etc., to prevent the entry of water and mud , High braking sensitivity and small pedal travel
Active Publication Date: 2015-09-02
玉环奥恒机械有限公司
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Problems solved by technology
Its defects are as follows: 1. When the harvester is working in the farmland, the turning radius is small, and one pedal needs to be able to brake on one side alone; Mud, easy to rust; the piston is also easy to get stuck, making it difficult to reset
2. Frequent leakage, no unilateral braking; since the connection between the ball valve seat and the pump body is a rigid seal, the requirements for the flatness and roughness of the parts are very high, and it is difficult to control in mass production
3. When the temperature of the brake system rises, one foot cannot brake
4. The force of the brake pedal is large: due to the large force required for the quick reset of the piston and the large spring stiffness, special tools are required for assembly and maintenance
Method used
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[0019] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0020] See attached figure 2 As shown, a hydraulic brake master cylinder structure for an agricultural harvester includes a pump body 11, and a cavity A, a cavity B, two second-step holes C and two second-step holes D are opened in the pump body 11, wherein Chamber A and Chamber B are set on the upper part of the pump body 11, the second stepped hole C is set at the rear of the pump body 11, and the second stepped hole D is set at the front of the pump body 11, wherein the diameter of the second stepped hole D is larger than that of the second stepped hole The hole diameter of C, in the A chamber and B chamber, there are oil inlet holes 21 and the oil inlet holes 21 are ...
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The invention relates to a hydraulic brake master pump structure of an agricultural harvester, and belongs to the brake field of agricultural harvesters. The hydraulic brake master pump structure of the agricultural harvester comprises a pump body, a cavity A, a cavity B, two stepped holes C and two stepped holes D are formed in the pump body, oil inlet holes are both formed in the cavity A and the cavity B, and a quick-charging valve assembly is arranged in each oil inlet hole. A small piston is arranged in each stepped hole C, a big piston is arranged in each stepped hole D, a dustproof cover is installed at the front end of each big piston in a sleeved mode, and the small pistons and the big pistons are connected in a screwed mode. An oil outlet hole is formed in the rear side of each small piston, an oil outlet plug and an oil outlet connector are arranged on the oil outlet hole, moreover an O-shaped seal ring is arranged between each oil outlet plug and the pump body, steel ball screws are arranged below the two stepped holes C, and steel balls are arranged between the steel ball screws and the two stepped holes. The hydraulic brake master pump structure of the agricultural harvester is labor-saving in braking, small in pedal travel, high in brake sensitivity, easy to manufacture and reliable in work, the pistons can slide freely and prevent water and cement from entering, braking can be achieved just by one step, and the gaps between the pistons and the cylinder holes are small.
Description
technical field [0001] The invention relates to the field of braking of an agricultural harvester, in particular to a hydraulic brake master cylinder structure of an agricultural harvester. Background technique [0002] As we all know, in the field of braking of existing agricultural harvesters, the structure of the hydraulic brake master cylinder of agricultural harvesters can be found in the appendix of the manual. figure 1 As shown, when braking, depress the brake pedal, the piston moves forward; close the oil inlet valve port, and build up the system pressure. Its defects are as follows: 1. When the harvester is working in the farmland, the turning radius is small, and one pedal is operated alone, which needs to be able to brake on one side; Mud makes it easy to rust; the piston is also easy to get stuck, making it difficult to reset. 2. Frequent leakage, no unilateral braking; since the joint between the ball valve seat and the pump body is rigidly sealed, the require...
Claims
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IPC IPC(8): B60T11/16
Inventor 陈灵刚刘叶芝刘叶勇杨贵清
Owner 玉环奥恒机械有限公司