Hydraulic power steering oil tank

Abstract

The utility model discloses a hydraulic power steering oil tank which comprises a tank body and a filter element, the tank body is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the filter element, the filter element cuts off a cavity in the tank body in the radial direction, and the filter element is provided with a plurality of through holes communicated with the oil inlet and a cavity in the upper side of the filter element and used for guiding hydraulic oil to different directions. The filter element is provided with a plurality of filter holes communicated with upper and lower cavities of the filter element and used for filtering impurities in hydraulic oil on the upper side of the filter element; a plurality of stopping pieces annularly distributed along the axis of the tank body are arranged at the top of the filter element and are used for stopping hydraulic oil from rotating and flowing in the radial plane of the tank body; the device can prevent hydraulic oil from forming vortexes in the tank body.

Description

Technical Field

[0001] This utility model relates to a steering oil tank, and more particularly to a hydraulic power steering oil tank. Background Technology

[0002] The purpose of the power steering reservoir is to provide power steering fluid to the power steering system, cool the fluid, and filter impurities from the system through fluid circulation.

[0003] Chinese utility model patent CN209258227U discloses a power steering reservoir assembly, including a tank body, a tank cover, a filter element, a filter element shaft, a locking head, and a dipstick. The tank body has a top opening and a cavity capable of accommodating the filter element. The opening of the tank body is sealed to the tank cover by a tank cover sealing ring, which snaps onto the opening of the tank body. The assembly includes a first sealing body and a second sealing body located on the outer and inner sides of the tank body, respectively. The first sealing body has at least one sealing protrusion. The outer ring of the tank cover has a first folded edge, and a pressing space is provided between the first folded edge and the outer side of the tank body. The first sealing body is placed within the pressing space, and the at least one sealing protrusion abuts against the first folded edge for sealing. The second sealing body is fitted and sealed to the inner side of the tank body. Compared to previous products, this utility model features structural optimization, simplifies the assembly process, and reduces production costs.

[0004] Although the aforementioned steering oil tank has a simplified structure, its oil inlet is located on the side wall of the tank. The oil entering directly impacts the side wall of the tank, which can easily form eddies. This can cause gas to enter the steering system with the eddies, resulting in steering failure or difficulty in steering. It can also prevent the tank from being damaged by eddies that exist inside the tank for a long time. Summary of the Invention

[0005] Purpose of the utility model: The purpose of this utility model is to provide a hydraulic power steering tank that can prevent hydraulic oil from forming eddies in the tank body.

[0006] Technical solution: The hydraulic power steering oil tank of this utility model includes a tank body and a filter element. The tank body is provided with an oil inlet and an oil outlet. The oil inlet is connected to the filter element. The filter element radially blocks the internal cavity of the tank body. The filter element is provided with multiple through holes that connect the oil inlet and the upper cavity of the filter element for guiding the hydraulic oil to different directions. The filter element is provided with multiple filter holes that connect the upper and lower cavities of the filter element for filtering impurities in the hydraulic oil on the upper side of the filter element.

[0007] Based on the above technical solution, the oil inlet is connected to the filter element, which has multiple through holes to guide the hydraulic oil flowing in from the inlet in different directions. This way, even if the hydraulic oil impacts the side wall of the tank, it will be guided in different directions, making it less likely to form eddies. This avoids the situation where the oil inlet is directly connected to the tank, causing the hydraulic oil to impact the side wall of the tank from a single direction and form eddies. The filter element radially divides the internal cavity of the tank into upper and lower parts, so that the hydraulic oil can first enter the upper cavity for temporary storage. Then, under the action of gravity, it passes through the filter holes of the filter element to filter impurities before flowing to the oil outlet at the bottom of the tank. This prevents impurities from entering the subsequent power steering pump, causing wear or even jamming of the power steering pump impeller, thus enabling the filter element to perform its basic filtering function.

[0008] Preferably, the top of the filter element is provided with a plurality of blocking elements distributed in a ring along the axis of the tank, which are used to block the hydraulic oil from rotating and flowing in the radial plane of the tank.

[0009] If the hydraulic oil flowing into the tank still forms a vortex after flowing in different directions through the through hole, the vortex can be blocked by the blocking component to prevent the rotational flow of the hydraulic oil, thus further ensuring that no vortex will form inside the tank.

[0010] Preferably, the blocking element is a rectangular plate parallel to the tank axis, and the blocking elements are distributed equidistantly in a ring along the tank axis.

[0011] The blocking components are designed as rectangular plates, which are simple in structure and easy to manufacture. The equidistant ring distribution can more evenly block the eddies.

[0012] Preferably, the filter element sidewall is spaced apart from the tank sidewall.

[0013] The filter element sidewall is spaced apart from the tank sidewall, which allows for through holes to be provided on the filter element sidewall as well. This increases the channels for hydraulic oil to flow out, preventing the number of through holes from being too small, which could cause excessive hydraulic oil pressure and damage to the tank due to a large impact. It could also prevent the formation of eddies due to excessive oil pressure flowing out of certain through holes.

[0014] Preferably, the through holes on the side of the filter element opposite to the side wall of the tank are grid-type vertical holes.

[0015] The side wall is equipped with grid-like vertical holes, which can increase the area of ​​the hydraulic oil outflow channel and avoid excessive oil pressure due to blockage.

[0016] Preferably, the side wall of the tank is provided with a groove that matches the bottom of the filter element, and the tank is provided with a limiting device to prevent the filter element from moving axially.

[0017] By setting a groove on the side wall of the tank that matches the bottom of the filter element, the filter element can be better fixed. Setting a limiting device can prevent the filter element from axially moving inside the tank due to hydraulic oil impact, which would reduce the stability of its connection with the oil inlet.

[0018] Preferably, the filter element has an axial protrusion at the bottom, and the tank has a limiting groove that matches the axial protrusion.

[0019] The bottom of the filter element is provided with an axial protrusion, and the tank is provided with a matching limiting groove. In this way, the axial protrusion can be inserted into the limiting groove to prevent the filter element from rotating circumferentially.

[0020] Beneficial effects: Compared with the prior art, the beneficial effects of this utility model are as follows: By connecting the oil inlet to the filter element and the filter element radially blocking the cavity inside the tank, and by setting multiple through holes in the filter element to connect the oil inlet to the cavity above it, the hydraulic oil is guided to different directions when it enters the tank to avoid generating eddies. The filter holes at the bottom of the filter element can maintain the filtering function of the filter element. Secondly, the blocking element at the top of the filter element can further prevent the hydraulic oil from generating eddies. Attached Figure Description

[0021] Figure 1 This is a side sectional view of the steering oil tank;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the filter element. Detailed Implementation

[0023] As shown in the figure, the hydraulic power steering oil tank of this utility model includes a tank body 1 and a filter element 2. The tank body 1 is provided with an oil inlet 3 and an oil outlet 4. The oil inlet 3 is connected to the filter element 2. The filter element 2 radially blocks the inner cavity of the tank body 1. The filter element 2 is provided with multiple through holes 5 that connect the oil inlet 3 and the upper cavity of the filter element 2 for guiding the hydraulic oil to different directions. The filter element 2 is provided with multiple filter holes 6 that connect the upper and lower cavities of the filter element 2 for filtering impurities in the hydraulic oil on the upper side of the filter element 2.

[0024] The tank body 1 has an oil inlet 3 on its side wall and an oil outlet 4 at its bottom. The tank body 1 can be divided into an upper tank and a lower tank. The upper tank and the lower tank can be connected in a detachable manner, such as by bolting, and a sealing mechanism can be set at the connection point. The upper tank and the lower tank can also be connected by welding or other methods.

[0025] The filter element 2 includes a chassis 2-1, a filter element sidewall 2-2, and a top plate 2-3. The edge of the chassis 2-1 abuts against the sidewall of the tank 1. The filter element 2 divides the cavity inside the tank 1 into two parts: one part is located on the upper side of the filter element 2, and the other part is located on the lower side of the filter element 2. For ease of description, these will be referred to as the upper cavity and the lower cavity, respectively, with the chassis 2-1 serving as the boundary between the two cavities. The side of the filter element sidewall 2-2 near the oil inlet 3 is flush with the edge of the chassis 2-1 and also abuts against the sidewall of the tank 1 to prevent oil leakage at the oil inlet 3. The edge of the remaining part is located on the inner side of the chassis 2-1, that is, the filter element sidewall 2-2 is spaced apart from the sidewall of the tank 1. In addition to this arrangement, the entire edge of the filter element sidewall 2-2 can also be located on the inner side of the edge of the chassis 2-1, or a separate connecting pipe can be provided on the filter element sidewall 2-2 to connect with the oil inlet 3.

[0026] Multiple through holes 5 are provided on the side wall 2-2 and the top plate 2-3 of the filter element to guide the hydraulic oil to the upper cavity. The through holes 5 on the side wall 2-2 of the filter element can be grid-type vertical holes, and the through holes 5 on the top plate 2-3 can be round holes, or all through holes 5 can be round holes. Because the through holes 5 are set in multiple directions, it can effectively prevent the hydraulic oil from impacting the side wall of the tank 1 from a single direction and forming a vortex. Multiple filter holes 6 are provided on the chassis 2-1. The filter holes 6 are equipped with filter screens and other filter devices to filter impurities in the hydraulic oil. The hydraulic oil flows into the upper cavity through the oil inlet 3 for temporary storage. Subsequently, under the action of gravity, it flows into the lower cavity through the filter holes 7 and finally flows out through the oil outlet 4.

[0027] The top plate 2-3 has three rectangular plates arranged in a ring around the axis of the tank body 1 as blocking elements 7. When the hydraulic oil forms a vortex in the radial plane of the tank body 1, it will impact the blocking elements 7 during the flow process and be obstructed, deviating from the original flow direction. This is equivalent to cutting off the vortex through the blocking elements 7, further preventing the formation of vortices. Because the side wall of the tank body 1 is arc-shaped, the hydraulic oil impacting the side wall of the tank body 1 will form a vortex in the radial plane, but will not form a vortex in the axial plane. Therefore, the blocking elements 7 are set in this way to effectively prevent the formation of vortices.

[0028] The side wall of the tank body 1 can also be provided with a groove that matches the chassis 2-1, and the chassis 2-1 is directly snapped into the groove; and a limiting device 8 is provided on the tank body 1 to prevent the filter element 2 from moving axially. The limiting device 8 can be a connecting column connected to the tank cover of the tank body 1, and the bottom of the connecting column abuts against the blocking part 7; the limiting device 8 can also be a sliding limiting rod provided on the side wall of the tank body 1. The limiting rod slides to the bottom and abuts against the chassis 2-1 to prevent the filter element 2 from moving axially, and slides upward to separate from the chassis 2-1, making it convenient to remove and replace the filter element 2.

[0029] An axial protrusion 9 can also be provided at the bottom of the filter element 2, and a matching limiting groove is provided on the tank body 1. The axial protrusion 9 is inserted into the limiting groove to prevent the filter element 2 from rotating axially.

Claims

1. A hydraulic power steering oil tank, comprising a tank body (1) and a filter element (2), wherein the tank body (1) is provided with an oil inlet (3) and an oil outlet (4), characterized in that: The oil inlet (3) is connected to the filter element (2). The filter element (2) radially blocks the inner cavity of the tank body (1). The filter element (2) is provided with multiple through holes (5) that connect the oil inlet (3) and the upper cavity of the filter element (2) to guide the hydraulic oil to different directions. The filter element (2) is provided with multiple filter holes (6) that connect the upper and lower cavities of the filter element (2) to filter impurities in the hydraulic oil on the upper side of the filter element (2).

2. The hydraulic power steering oil tank according to claim 1, characterized in that: The filter element (2) is provided with a plurality of blocking elements (7) arranged in a ring along the axis of the tank (1) at the top. The blocking elements (7) are used to block the hydraulic oil from rotating and flowing in the radial plane of the tank (1).

3. A hydraulic power steering oil tank according to claim 2, characterized in that: The blocking element (7) is a rectangular plate parallel to the axis of the tank body (1), and the blocking elements (7) are distributed equidistantly in a ring along the axis of the tank body (1).

4. A hydraulic power steering oil tank according to claim 1, characterized in that: The side wall of the filter element (2) is spaced apart from the side wall of the tank (1).

5. A hydraulic power steering oil tank according to claim 4, characterized in that: The through holes (5) on the opposite side of the filter element (2) and the tank body (1) are grid-type vertical holes.

6. A hydraulic power steering oil tank according to claim 4, characterized in that: The side wall of the tank (1) is provided with a groove that matches the bottom of the filter element (2), and the tank (1) is provided with a limiting device (8) to prevent the filter element (2) from moving axially.

7. A hydraulic power steering oil tank according to claim 6, characterized in that: The filter element (2) has an axial protrusion (9) at the bottom, and the tank (1) has a limiting groove that matches the axial protrusion (9).

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