Pilot oil source valve support, hydraulic oil tank system and excavator

Abstract

The pilot oil source valve support comprises a support plate, screw seats are fixedly connected to the two ends of the support plate and used for being fixed to the tank wall of a hydraulic oil tank, the middle of the support plate is bent and protrudes to form an n-shaped structure, and the top of the bent protrusion is used for installing a pilot oil source valve. The extending direction of the bent protrusion is the direction far away from the energy accumulator on one side of the pilot oil source valve after the pilot oil source valve is installed, the reliability of the pilot oil source valve support is higher, and the risk of breakage is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pilot oil source valve installation, and in particular to a pilot oil source valve bracket, a hydraulic oil tank system and an excavator. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the current excavator hydraulic oil tank system, Figure 1-Figure 2 As shown, the pilot oil source valve 1 is fixed to the box wall of the hydraulic oil tank 2, and an accumulator 3 is provided on one side of the pilot oil source valve 1. The pilot oil source valve 1 is fixedly connected to the box wall of the hydraulic oil tank through a bracket. The bracket includes a flat plate. The pilot oil source valve is fixed on the bracket plate. The bracket plate is a rectangular flat plate 4. A wire seat 5 is provided at the bottom end of the bracket plate. The wire seat 5 is fixedly connected to the box wall of the hydraulic oil tank 2, and the bottom end of the flat plate is fixedly connected to the wire seat by bolts. With this arrangement, since the accumulator is arranged on one side of the pilot oil source valve, it is suspended and has a large weight. The stress at the connection position between the bracket plate and the wire seat is large, and the stress at the connection position between the wire seat and the box wall of the hydraulic oil tank is large, and there is a high risk of breakage. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a pilot oil source valve bracket, a hydraulic oil tank system and an excavator, wherein the bracket is subjected to more reasonable force and the risk of breakage is reduced.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides a pilot oil source valve bracket, including a bracket plate, both ends of the bracket plate are fixedly connected with wire seats, the wire seats are used to be fixed to the box wall of the hydraulic oil tank, the middle position of the bracket plate is bent with a protrusion to form a "J" shape structure, the top of the bent protrusion is used to install the pilot oil source valve, and the extension direction of the bent protrusion is the direction away from the accumulator on one side of the pilot oil source valve after the pilot oil source valve is installed.

[0007] Optionally, the bracket plate parts on both sides of the bending protrusion are provided with at least one first fixing hole, and the surface of the wire seat used to cooperate with the bracket plate is provided with a threaded hole matching the first fixing hole, and the bracket plate is fixedly connected to the wire seat through the first fixing hole, the threaded hole and the threaded fastener.

[0008] Optionally, the wire seat is a cubic block, a first side surface of one side of which is used for fixing to the box wall of the hydraulic oil tank, and a second side surface opposite to the first side surface is provided with a threaded hole for fixing to the bracket plate.

[0009] Optionally, the wire seats connected to the two sides of the bracket plate are symmetrically arranged relative to the center of the bracket plate.

[0010] Optionally, the angle between the extension direction of the bending protrusion and the plane where the rest of the bracket plate is located is 42°-48°.

[0011] Optionally, the bracket plate includes a first plate portion, the first plate portion is provided with a second fixing hole, the second fixing hole matches the pilot oil source valve to fix the pilot oil source valve, the second plate portion is provided at both ends of the first plate portion, the first plate portion and the second plate portion together constitute a bending protrusion, one end of the second plate portion is connected to the first plate portion, and the other end is connected to the third plate portion, and the third plate portion is fixed to the wire seat.

[0012] Optionally, an arc-shaped transition portion is provided between the first plate portion and the second plate portion.

[0013] Optionally, an arc-shaped transition portion is provided between the second plate portion and the third plate portion.

[0014] In the second aspect, an embodiment of the present invention provides a hydraulic oil tank system, including a hydraulic oil tank, which is connected to a pilot oil source valve through the pilot oil source valve bracket described in the first aspect, the pilot oil source valve is fixed on the top of the bending protrusion, and the extension direction of the bending protrusion is toward the direction away from the accumulator on one side of the pilot oil source valve, and the wire seat is fixed to the box wall of the hydraulic oil tank.

[0015] In a third aspect, an embodiment of the present invention provides an excavator provided with the hydraulic oil tank system described in the second aspect.

[0016] The beneficial effects of the present invention are as follows:

[0017] The pilot oil source valve bracket of the present invention has a bracket plate on both sides fixedly connected to the wire seat, and both sides of the bracket plate can provide supporting force through the wire seat, the bracket plate is provided with a bending protrusion, and the extension direction of the bending protrusion is the direction away from the accumulator on one side of the pilot oil source valve after the pilot oil source valve is installed. After the pilot oil source valve is fixed to the wall of the hydraulic oil tank through the bracket, the stress between the wire seat and the wall of the hydraulic oil tank is significantly reduced, and the stress between the bracket plate and the wire seat is significantly reduced. The force on the entire bracket is more reasonable, which greatly reduces the risk of bracket breakage and ensures the normal operation of the hydraulic oil tank system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is the main view of the current fixing method of the pilot oil source valve and the hydraulic oil tank;

[0020] Figure 2 This is a side view of the current fixing method of the pilot oil source valve and the hydraulic oil tank;

[0021] Figure 3 This is a front view of the pilot oil source valve bracket of Example 1 of the present invention;

[0022] Figure 4 1 is a side view of a pilot oil source valve support according to embodiment 1 of the present invention;

[0023] Figure 5 This is a front view of the overall structure of Example 2 of the present invention;

[0024] Figure 6 is a side view of the overall structure of embodiment 2 of the present invention;

[0025] Figure 7 It is the stress simulation analysis diagram of the current hydraulic oil tank system;

[0026] Figure 8 is a stress simulation analysis diagram of a hydraulic oil tank system of Embodiment 2 of the present invention;

[0027] Among them, 1. pilot oil source valve, 2. hydraulic oil tank, 3. accumulator, 4. rectangular flat plate, 5. wire seat, 6. first plate part, 7. second plate part, 8. third plate part, 9. first fixing hole, 10. second fixing hole. DETAILED DESCRIPTION

[0028] Example 1

[0029] This embodiment provides a pilot oil source valve bracket, such as Figure 3-Figure 4 As shown, it includes a bracket plate, which adopts a "J"-shaped structure and is provided with a bending protrusion. The top of the bending protrusion is used to fix the pilot oil source valve 1, and the bracket plate parts on both sides of the bending protrusion are fixedly connected to the wire seat 5. The wire seat 5 is used to be fixed to the box wall of the hydraulic oil tank. The extension direction of the bending protrusion and the part of the bracket plate connected to the wire seat 5 form a set acute angle, and the extension direction is toward the direction of the accumulator 3 away from the fixed side of the pilot oil source valve 1, that is, the bending protrusion is tilted toward the direction away from the accumulator 3.

[0030] The bracket plate includes a first plate portion 6 , both ends of the first plate portion 6 are vertically connected to the second plate portion 7 , one end of the second plate portion 7 is connected to the first plate portion 6 , and the other end is vertically connected to the third plate portion 8 .

[0031] The third plate portion 8 is used for fixed connection with the wire seat 5 .

[0032] The central axis of the first plate portion 6 is offset from the central axis of the region between the two third plate portions 8 so that the extension direction of the second plate portion 7 is toward the direction of the accumulator 3 away from the fixed pilot oil source valve 1 .

[0033] In this embodiment, the wire seat 5 is a cubic block. Preferably, the wire seat 5 is a rectangular block. The first side surface of one side of the wire seat 5 is used for fixed connection with the box wall of the hydraulic box 2, and the second side surface opposite to the first side surface is used for fixing with the third plate portion 8.

[0034] The third plate portion 8 is provided with a plurality of first fixing holes 9, preferably, two first fixing holes 9 are provided, the side surface of the wire seat 5 is provided with a threaded hole matching the first fixing hole 9, the third plate portion 8 and the wire seat 5 are fixedly connected via the first fixing holes 9, the threaded holes and fasteners, preferably, the fasteners are threaded fasteners such as bolts or screws, and those skilled in the art can select them according to actual needs.

[0035] Furthermore, the two wire seats 5 are symmetrically arranged relative to the center of the entire bracket plate.

[0036] The extending direction of the second plate portion 7 forms a set acute angle with the third plate portion 8 , so that the extending direction of the second plate portion 7 is a direction away from the accumulator 3 on one side of the pilot oil source valve 1 after the pilot oil source valve 1 is fixed.

[0037] Preferably, the set acute angle is 42°-48°, preferably 45°.

[0038] A plurality of second fixing holes 10 are provided on the first plate portion 6, and the second fixing holes 10 match the pilot oil source valve 1 and are used to fix the pilot oil source valve 1. In this embodiment, the second fixing holes 10 have the same distribution pattern as the fixing holes on the current bracket for fixing the pilot oil source valve, including three second fixing holes 10, and the three second fixing holes 10 are distributed in a triangular shape.

[0039] Furthermore, in order to avoid stress concentration between the first plate portion 6 and the second plate portion 7, an arc-shaped transition portion is provided between the first plate portion 6 and the second plate portion 7, and in order to avoid stress concentration between the second plate portion 7 and the third plate portion 8, an arc-shaped transition portion is provided between the second plate portion 7 and the third plate portion 8.

[0040] Example 2

[0041] This embodiment provides a hydraulic oil tank system, such as Figure 5-Figure 6 As shown, it includes a hydraulic oil tank 2, a pilot oil source valve 1 and the pilot oil source valve bracket described in Example 1, wherein the wire seat 5 is fixedly connected to the outer side of the box wall of the hydraulic oil tank 2, and the fixing method adopts the current fixing method of the wire seat and the box wall of the hydraulic oil tank, which will not be described in detail here.

[0042] The pilot oil source valve 1 is fixed to the first plate portion 6 through the second fixing hole 10 , and the extending direction of the bent protrusion is toward the direction away from the accumulator 3 on one side of the pilot oil source valve 1 .

[0043] The remaining structures of the hydraulic oil tank system may adopt the existing technology and will not be described in detail here.

[0044] The current fixing method of the pilot oil source valve is: the pilot oil source valve is fixed on a rectangular plate, and then the bottom end of the rectangular plate is connected to the thread seat by bolts, and the thread seat is fixed on the wall of the hydraulic oil tank. When this fixing method is adopted, Figure 7 As shown, after simulation analysis, the stress at the connection between the rectangular plate and the wire seat is 493, and the stress at the connection between the wire seat and the wall of the hydraulic oil tank is 225.

[0045] After the pilot oil source valve is fixed to the hydraulic oil tank by the bracket of this embodiment, Figure 8 As shown, after simulation analysis, it is found that the stress at the connection between the first plate portion and the pilot oil source valve is 126, the stress at the connection between the wire seat and the hydraulic oil tank wall is 81, and the stress at the connection between the third plate portion and the wire seat is 86.

[0046] Therefore, by adopting the hydraulic oil tank system of this embodiment, the pilot oil source valve is fixed to the hydraulic oil tank through the pilot oil source valve bracket described in Example 1, the stress between the wire seat and the hydraulic oil tank wall is significantly reduced, the stress between the bracket plate and the wire seat is significantly reduced, the force on the entire bracket is more reasonable, the risk of bracket breakage is greatly reduced, and the normal operation of the hydraulic oil tank system is ensured.

[0047] Example 3

[0048] This embodiment provides an excavator, which is provided with the hydraulic oil tank system described in Embodiment 2. The remaining structures of the excavator can adopt the existing technology and will not be described in detail here.

[0049] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pilot oil source valve bracket, characterized in that: It includes a bracket plate, both ends of which are fixedly connected with wire seats, the wire seats are used to be fixed to the box wall of the hydraulic oil tank, the middle part of the bracket plate is bent with a protrusion to form a "X" shape structure, the top of the bent protrusion is used to install the pilot oil source valve, and the extension direction of the bent protrusion is the direction away from the accumulator on one side of the pilot oil source valve after the pilot oil source valve is installed.

2. A pilot oil source valve support as claimed in claim 1, characterized in that: The bracket plate parts on both sides of the bending protrusion are each provided with at least one first fixing hole, and the surface of the wire seat used to cooperate with the bracket plate is provided with a threaded hole matching the first fixing hole, and the bracket plate is fixedly connected to the wire seat through the first fixing hole, the threaded hole and the threaded fastener.

3. A pilot oil source valve support as claimed in claim 1, characterized in that: The wire seat is a cubic block, a first side surface of one side of which is used to be fixed to the box wall of the hydraulic oil tank, and a second side surface opposite to the first side surface is provided with a threaded hole for fixing to the bracket plate.

4. A pilot oil source valve support as claimed in claim 1, characterized in that: The wire seats connected to the two sides of the support plate are symmetrically arranged relative to the center of the support plate.

5. A pilot oil source valve support as claimed in claim 1, characterized in that: The angle between the extending direction of the bending protrusion and the plane where the rest of the bracket plate is located is 42°-48°.

6. A pilot oil source valve support as claimed in claim 1, characterized in that: The bracket plate includes a first plate portion, the first plate portion is provided with a second fixing hole, the second fixing hole matches the pilot oil source valve to fix the pilot oil source valve, the second plate portions are provided at both ends of the first plate portion, the first plate portion and the second plate portion together constitute a bending protrusion, one end of the second plate portion is connected to the first plate portion, and the other end is connected to the third plate portion, and the third plate portion is fixed to the wire seat.

7. A pilot oil source valve support as claimed in claim 6, characterized in that: An arc-shaped transition portion is provided between the first plate portion and the second plate portion.

8. A pilot oil source valve support as claimed in claim 6, characterized in that: An arc-shaped transition portion is arranged between the second plate portion and the third plate portion.

9. A hydraulic oil tank system, comprising a hydraulic oil tank, characterized in that: The hydraulic oil tank is connected to a pilot oil source valve through the pilot oil source valve bracket described in any one of claims 1-8. The pilot oil source valve is fixed on the top of the bending protrusion, and the extension direction of the bending protrusion is toward the direction away from the accumulator on one side of the pilot oil source valve. The wire seat is fixed to the box wall of the hydraulic oil tank.

10. An excavator, characterized in that: A hydraulic oil tank system according to claim 9 is provided.

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