阅读说明：本技术 一种用于液压驱动系统的齿轮轴 (Gear shaft for hydraulic driving system ) 是由 陈果 王勇 王建波 王理 彭英海 段爱华 黄学进 于 2021-02-01 设计创作，主要内容包括：本发明公开了一种用于液压驱动系统的齿轮轴,包括齿轮部和齿轮部两端的转轴,所述齿轮部包括齿槽和啮合齿,所述啮合齿的数量为偶数,相对的齿槽中部贯穿开有通油孔,数个通油孔在齿轮部上相互间隔的齿槽中均匀分布。本发明齿轮部采用独特、巧妙的设计,在输出齿轮轴和从动齿轮轴啮合过程中形成困油区时,能有效的将困油区内的高压油通过通油孔压入低压区,从而有效的解决了液压马达的困油问题。(The invention discloses a gear shaft for a hydraulic driving system, which comprises a gear part and rotating shafts at two ends of the gear part, wherein the gear part comprises tooth grooves and meshing teeth, the number of the meshing teeth is even, oil through holes penetrate through the middle parts of the opposite tooth grooves, and the oil through holes are uniformly distributed in the mutually spaced tooth grooves on the gear part. The gear part adopts unique and ingenious design, and can effectively press high-pressure oil trapped in the oil trapping area into the low-pressure area through the oil through hole when the oil trapping area is formed in the meshing process of the output gear shaft and the driven gear shaft, so that the oil trapping problem of the hydraulic motor is effectively solved.)

1. A gear shaft for a hydraulic drive system, comprising a gear portion and a rotary shaft (3) at both ends of the gear portion, characterized in that: the gear portion includes tooth's socket (1) and meshing tooth (2), the quantity of meshing tooth (2) is the even number, and relative tooth's socket (1) middle part is run through and is opened oil through hole (4), and evenly distributed in tooth's socket (1) that several oil through hole (4) spaced each other on gear portion.

2. A gear shaft for a hydraulic drive system according to claim 1, wherein: the number of the meshing teeth (2) is a multiple of 4.

3. A gear shaft for a hydraulic drive system according to claim 1 or 2, wherein: the oil through hole (4) is horizontally arranged.

4. A gear shaft for a hydraulic drive system according to claim 3, wherein: the plurality of oil through holes (4) which are horizontally arranged are arranged in a staggered manner in the vertical direction of the gear part.

5. A gear shaft assembly prepared using the gear shaft for a hydraulic drive system of claim 4, wherein: the gear comprises two gear shafts which are meshed with each other, and after the two gear shafts are meshed with each other, the oil through holes (4) of one gear shaft and the oil through holes (4) of the other gear shaft are distributed in a staggered mode.

6. Use of the gear shaft assembly of claim 5 in a hydraulic gear motor.

7. A method of applying the gear shaft assembly of claim 5 to a hydraulic gear oil pump.

Technical Field

The invention belongs to the technical field of hydraulic driving systems, and particularly relates to a gear shaft for a hydraulic driving system.

Background

In the process of meshing of a hydraulic driving gear in the existing hydraulic driving system, the meshing part can have the problem of trapped oil to form an oil trapping area, extremely high pressure can be generated in the oil trapping area to cause deformation of a gear shaft, and otherwise, the pressure in the oil trapping area can be reduced only by reducing the rotating speed. The existing solution is to open an unloading groove at the end cover, when the trapped oil is trapped, the trapped oil is unloaded from the end cover, the unloading groove has extremely high requirements on design and processing precision, so that a lot of waste products are produced, the reject ratio is high, and the unloading groove only plays a role in relieving pressure unloading, so that the effect of solving the trapped oil problem is not ideal. Therefore, the proposal that under the condition of an original unloading groove, the gear shaft is improved to solve the problem of oil trapping is provided.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a gear shaft for a hydraulic drive system, which can effectively solve the problem of oil trapping generated when the gear shaft is meshed and provide a powerful guarantee for high-speed rotation of the gear shaft, aiming at the defects of the prior art.

The technical scheme adopted by the invention is as follows: the gear shaft for the hydraulic driving system comprises a gear part and rotating shafts at two ends of the gear part, wherein the gear part comprises tooth grooves and meshing teeth, the number of the meshing teeth is even, oil through holes penetrate through the middle part of the opposite tooth grooves, and the oil through holes are uniformly distributed in the tooth grooves spaced on the gear part.

Preferably, the number of the teeth is a multiple of 4.

Preferably, the oil through hole is horizontally disposed.

Preferably, the plurality of horizontally disposed oil through holes are staggered in a vertical direction of the gear portion.

Preferably, the gear shaft assembly comprises two gear shafts which are meshed with each other, and after the two gear shafts are meshed with each other, the oil through holes of one gear shaft and the oil through holes of the other gear shaft are distributed in a staggered mode.

Preferably, the gear shaft assembly is applied to a hydraulic gear motor.

Preferably, the gear shaft assembly is applied to a hydraulic gear oil pump.

The gear part adopts unique and ingenious design, and can effectively press high-pressure oil trapped in the oil trapping area into the low-pressure area through the oil through hole when the oil trapping area is formed in the meshing process of the output gear shaft and the driven gear shaft, so that the oil trapping problem of the hydraulic motor is effectively solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a gear shaft assembly of the present invention;

FIG. 3 is a cross-sectional view of the gear shaft assembly of the present invention;

FIG. 4 is a schematic diagram of the present invention.

In the figure: 1. a tooth socket; 2. meshing teeth; 3. a rotating shaft; 4. an oil through hole.

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments.

Example 1

As shown in fig. 1, 2, 3 and 4, the gear shaft for a hydraulic gear motor provided by this embodiment includes a gear portion and a rotating shaft at two ends of the gear portion, the gear portion includes tooth grooves and meshing teeth, the meshing teeth of the gear portion are sixteen, oil through holes horizontally arranged are opened in the middle of opposite tooth grooves, that is, four oil through holes are opened on the gear portion of sixteen meshing teeth, the four oil through holes are uniformly distributed in the tooth grooves spaced from each other on the gear portion, the four oil through holes are staggered in the vertical direction of the gear portion, that is, the four oil through holes are different in height in the vertical direction of the gear portion.

Adopt this embodiment to be used for hydraulic gear motor's gear shaft to constitute gear shaft subassembly, the gear shaft subassembly includes two intermeshing's gear shaft, and two gear shaft meshing back, the oil through hole dislocation distribution of the oil through hole of one of them gear shaft and another gear shaft.

The gear assembly of this embodiment is when high-speed rotation, and the oil trapping phenomenon can appear in the meshing position of two gear shafts, can cause the pressure in the stranded oil district during the oil trapping to be high, and at this moment, high-pressure oil in the stranded oil district all can be impressed and lead to in the oilhole to arrange to the low-pressure region through leading to the oilhole, accomplish the uninstallation of stranded oil, carry out the off-load of stranded oil pressure simultaneously, thereby the effectual problem of stranded oil of having solved has guaranteed high-speed hydraulic motor's normal operating.

In the embodiment, the oil through hole is horizontally arranged, so that the length of the oil through hole is shortest, high-pressure oil quickly enters a low-pressure area through the oil through hole, and trapped oil unloading and pressure unloading are completed;

in the embodiment, the four oil through holes are arranged in a staggered manner in the vertical direction, so that each oil through hole is not influenced mutually, and quick unloading of trapped oil is guaranteed; if the oil through holes are communicated with each other, pressure is likely to be disturbed during unloading, and the rotating speed of the gear shaft is reduced.

Example 2

The gear shaft for the hydraulic gear oil pump provided by the embodiment has the same structure as the gear shaft in the embodiment 1, only the number of the meshing teeth is different, and the gear shaft of the embodiment adopts twenty meshing teeth and five oil through holes.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.