阅读说明：本技术 一种变量柱塞总成结构 (Variable plunger assembly structure ) 是由 马宗宇 陈满 余红波 丘伟平 房世龙 于 2021-01-13 设计创作，主要内容包括：本发明公开了一种变量柱塞总成结构,其特征在于,包括从上至下依次连接的球头和变量柱塞,球头由第一柱体与球体连接而成,变量柱塞由第二柱体与圆弧卡口连接而成,球头的所述球体与变量柱塞的所述圆弧卡口卡合连接；所述球体为实心结构,所述变量柱塞设有上下贯通的内腔。本发明的零件结构简单、加工方便、安装简单、性能稳定、成本低,既易于生产加工、安装操作,又降低了零件成本,提高了生产效率,保证了变量柱塞总成性能稳定工作。(The invention discloses a variable plunger assembly structure which is characterized by comprising a ball head and a variable plunger which are sequentially connected from top to bottom, wherein the ball head is formed by connecting a first cylinder and a ball body; the ball body is of a solid structure, and the variable plunger is provided with an inner cavity which is communicated up and down. The variable plunger assembly has the advantages of simple structure, convenient processing, simple installation, stable performance and low cost, is easy to produce, process and install, reduces the cost of parts, improves the production efficiency and ensures the stable performance of the variable plunger assembly.)

1. A variable plunger assembly structure is characterized by comprising a ball head and a variable plunger which are sequentially connected from top to bottom, wherein the ball head is formed by connecting a first cylinder and a ball body, the variable plunger is formed by connecting a second cylinder and an arc bayonet, and the ball body of the ball head is clamped and connected with the arc bayonet of the variable plunger; the ball body is of a solid structure, and the variable plunger is provided with an inner cavity which is communicated up and down.

2. The variable displacement ram assembly structure of claim 1, wherein the upper end of the first cylinder is provided with a groove, and the connection between the second cylinder of the variable displacement ram and the circular arc bayonet is provided with a step.

Technical Field

The invention relates to a variable plunger assembly structure, and belongs to the technical field of speed change of a hydraulic motor speed reducer.

Background

The variable plunger assembly is an important component of a hydraulic motor and a speed reducer, and mainly has the main function of pushing the variable plunger to move upwards by injecting hydraulic oil when the motor needs to switch high and low speeds, and further pushing a swash plate to rotate to a limit position, so that the displacement of the motor is reduced, and the purpose of quickly switching the high and low speeds of the hydraulic motor is achieved. In the existing speed changing structure of a hydraulic motor and a speed reducer, the speed changing structure and an oil way are complex, the requirements on the machining precision and the manufacturability of parts are high, the parts are various, and the cost is high.

Disclosure of Invention

The invention aims to solve the technical problems of how to construct a variable plunger assembly which is simple in structure, easy to produce and process, high in stability and low in cost, and solves the problems of complex speed change structure and oil way, high requirements on part processing precision and manufacturability and high cost in the conventional variable plunger assembly.

In order to solve the technical problem, the technical scheme of the invention provides a variable plunger assembly structure which is characterized by comprising a ball head and a variable plunger which are sequentially connected from top to bottom, wherein the ball head is formed by connecting a first cylinder and a ball body, the variable plunger is formed by connecting a second cylinder and an arc bayonet, and the ball body of the ball head is connected with the arc bayonet of the variable plunger in a clamping manner; the ball body is of a solid structure, and the variable plunger is provided with an inner cavity which is communicated up and down.

Preferably, the upper end of the first cylinder is provided with a groove, and a step is arranged at the joint of the second cylinder of the variable plunger and the arc bayonet.

The variable-speed hydraulic motor is simple in structure, the ball head is buckled through the variable plunger arc bayonet, and the swash plate is jacked up to achieve the variable-speed effect of the hydraulic motor under the action of hydraulic oil after the hydraulic oil is introduced. The structure only needs the variable plunger and the ball body, has simple part structure, convenient processing, simple installation, stable performance and low cost, is easy to produce, process and install, reduces the part cost, improves the production efficiency and ensures the stable performance work of the variable plunger assembly.

Drawings

Fig. 1 is a schematic structural diagram of a variable plunger assembly provided by the invention.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The embodiment provides a variable plunger assembly, as shown in fig. 1, which comprises a ball head and a variable plunger, wherein a groove 5 is formed in the upper end of a first cylinder 1 in the ball head, and the lower end of the first cylinder 1 is connected with a ball body 2. The ball body 2 is buckled by the arc bayonet 3 in the variable plunger, the lower end of the arc bayonet 3 is connected with the second cylinder 4, and an inner cavity 7 is arranged in the second cylinder 4 and is communicated up and down; the connection part of the second cylinder of the variable plunger and the arc bayonet is provided with a step 6.

The variable plunger assembly part has the advantages of simple structure, convenient processing, simple installation, stable performance and low cost, is easy to produce, process and install, reduces the part cost, improves the production efficiency, and has the advantages that the first ball head cylinder is matched and connected with the swash plate, the second variable plunger cylinder is matched and connected with the motor seat cylinder plug hole to form the sealing cavity, and the bottom of the plunger hole is connected with the motor seat inclined hole. Hydraulic oil enters the bottom of the plunger hole from the inclined hole to push the variable plunger to move upwards, and the variable plunger pushes the ball head to move upwards to jack the inclined plate. When the hydraulic pressure acting on the variable plunger is greater than the pressure borne by the upper end of the swash plate, the ball head jacks up the swash plate to rotate to the limit position, the displacement of the motor is reduced, and the motor is switched to a high-speed state; when the hydraulic oil is closed, the hydraulic pressure acting on the variable plunger is smaller than the pressure borne by the upper end of the swash plate, the swash plate returns to the initial position, the displacement of the motor is increased, and the motor is switched to a low-speed state.