Hydraulic pump noise reduction bag, hydraulic pump noise reduction structure and engineering machinery

Abstract

The utility model discloses a hydraulic pump noise reduction package, hydraulic pump noise reduction structure and engineering machinery, the hydraulic pump noise reduction package comprises a flexible inner protection layer, a flexible sound absorption layer and a flexible outer protection layer, the flexible inner protection layer is the inner wall of the hydraulic pump noise reduction package, the flexible outer protection layer is the outer wall of the hydraulic pump noise reduction package, and the flexible sound absorption layer is arranged on the flexible outer protection layer. The flexible sound absorption layer is located between the flexible inner protection layer and the flexible outer protection layer. A cavity allowing a hydraulic pump to be placed is formed in the hydraulic pump noise reduction bag, an opening allowing the hydraulic pump to stretch into the cavity is formed in one end of the hydraulic pump noise reduction bag, an oil pipe receding hole allowing an oil inlet and outlet pipe to penetrate through is formed in the hydraulic pump noise reduction bag, a first material splicing position is further arranged on the hydraulic pump noise reduction bag, and a second material splicing position is further arranged on the first material splicing position. The splicing positions of the first materials can be connected through stitches. According to the utility model, the structural design is reasonable, the flexible noise reduction bag structure is optimized, and the installation is simpler while the noise reduction effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a hydraulic pump noise reduction package, a hydraulic pump noise reduction structure, and engineering machinery. Background Technology

[0002] In recent years, the electrification of loaders has become a key development focus in the industry. Compared to traditional loaders, electric loaders lack the masking effect of engine noise, resulting in significantly louder hydraulic pump noise during hydraulic system operation. This severely impacts the overall machine's external sound power, driver's ambient noise level, and sound quality. Currently, the installation scheme for the hydraulic pump in electric loaders involves placing the hydraulic pump drive motor on the side of the machine, with the motor output shaft directly connected to the hydraulic pump. This existing design does not employ any active or passive noise reduction measures for the hydraulic pump, allowing the noise to be transmitted unimpeded through gaps in the frame into the external air or the cab.

[0003] The document "CN219509804U Hydraulic Pump Sound Insulation Cover and Engineering Machinery" addresses the above problems by designing a hydraulic pump sound insulation cover. This cover consists of an outer metal shell, a middle layer of sound-absorbing material, and an inner micro-perforated plate. Although it has a good noise reduction effect, it is difficult to install (the internal piping of the vehicle frame is complex and easily interferes with hydraulic lines and other accessories, causing structural noise), has a complex design, is large in size and weight, has a high cost, and is inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic pump noise reduction package, a hydraulic pump noise reduction structure, and engineering machinery to solve the problems of complex design, large size, large weight, difficult installation, high cost, and inconvenience of application of existing hydraulic pump soundproof covers.

[0005] To achieve the above objectives, the present invention provides a hydraulic pump noise reduction package, comprising a flexible inner protective layer, a flexible sound-absorbing layer, and a flexible outer protective layer. The flexible inner protective layer forms the inner wall of the package, and the flexible outer protective layer forms the outer wall. The flexible sound-absorbing layer is located between the flexible inner and outer protective layers. The package has an internal cavity for housing a hydraulic pump, and one end has an opening for the hydraulic pump to extend into the cavity. The package also has a pipe clearance hole for oil pipes to pass through, and a first material splice joint, which can be connected by stitching.

[0006] Furthermore, the top wall of the hydraulic pump noise reduction package is provided with several oil pipe clearance holes through which inlet and outlet oil pipes can pass.

[0007] Furthermore, the bottom wall of the hydraulic pump noise reduction package is provided with several oil pipe clearance holes through which inlet and outlet oil pipes can pass.

[0008] Furthermore, the hydraulic pump noise reduction package is cylindrical in shape, extending longitudinally along its length, with the opening located at the front end of the hydraulic pump noise reduction package; the first material splice is located on the side wall of the hydraulic pump noise reduction package, so that the hydraulic pump noise reduction package can be unfolded into a plane.

[0009] In a preferred embodiment, the flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are respectively fiberglass cloth, fiberglass mat, and fiberglass cloth.

[0010] Furthermore, the thicknesses of the flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are 1mm±0.2mm, 10mm±2mm, and 1mm±0.2mm, respectively; the other end of the hydraulic pump noise reduction package is provided with a second material splicing point, which can be connected by stitching, and a flip-up first end cap is formed on one side of the second material splicing point.

[0011] As another preferred embodiment, the flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are respectively non-woven fabric, PET sound-absorbing cotton, and fiberglass cloth.

[0012] Furthermore, the thickness of both the flexible inner protective layer and the flexible outer protective layer is 1mm ± 0.2mm, and the content of the flexible sound-absorbing layer per square meter is 450 ± 1g / m². 2 The other end of the hydraulic pump noise reduction package is provided with a third material splice, which can be attached with Velcro. A detachable second end cap is formed on one side of the third material splice.

[0013] This utility model also provides a hydraulic pump noise reduction structure, including a hydraulic pump and a hydraulic pump noise reduction package as described in any of the above technical solutions. The hydraulic pump noise reduction package is fitted on the hydraulic pump, and the inlet and outlet oil pipes of the hydraulic pump pass through the oil pipe clearance hole of the hydraulic pump noise reduction package.

[0014] This utility model also provides an engineering machinery, including an engineering machinery body, and a hydraulic pump noise reduction package or a hydraulic pump noise reduction structure as described in any of the above technical solutions, wherein the hydraulic pump noise reduction package or the hydraulic pump noise reduction structure is disposed on the engineering machinery body.

[0015] In summary, the technical solution of this utility model has the following beneficial effects: The structure of this utility model is reasonable. (1) The hydraulic pump noise reduction package includes a flexible inner protective layer, a flexible sound-absorbing layer and a flexible outer protective layer. The flexible inner protective layer is the inner wall of the hydraulic pump noise reduction package, the flexible outer protective layer is the outer wall of the hydraulic pump noise reduction package, and the flexible sound-absorbing layer is located between the flexible inner protective layer and the flexible outer protective layer. Thus, while ensuring the noise reduction effect, the hydraulic pump noise reduction package is optimized into a flexible noise reduction package structure. (2) The hydraulic pump noise reduction package has an internal cavity for placing the hydraulic pump. One end of the hydraulic pump noise reduction package has an opening for the hydraulic pump to extend into the cavity. The hydraulic pump noise reduction package has an oil pipe clearance hole for the inlet and outlet oil pipes to pass through. The hydraulic pump noise reduction package also has a first material splicing point, which can be connected by stitching. Therefore, during installation, the hydraulic pump noise reduction package can be directly fitted onto the hydraulic pump. The hydraulic pump extends into the cavity through the opening, and the inlet and outlet oil pipes pass outward through the oil pipe clearance hole. The splicing point of the hydraulic pump noise reduction package (i.e., the first material splicing point) is connected by stitching. It has good integration, simple installation, good reliability, good noise reduction effect, and light weight. As can be seen from the above analysis, compared with the prior art, the present invention optimizes the structure of the hydraulic pump noise reduction package from the rigid structure of the prior art of "outer metal shell + middle sound-absorbing cotton + inner micro-perforated plate" to a flexible noise reduction package structure. While ensuring the noise reduction effect, the structure is simpler, lighter, smaller, easier to install, and lower in cost, making it easier to apply. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the hydraulic pump noise reduction structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the hydraulic pump noise reduction package of this utility model from the first perspective;

[0018] Figure 3 This is a two-dimensional structural schematic diagram of the hydraulic pump noise reduction package of this utility model from a second perspective.

[0019] Figure 4 This is a schematic diagram of the hydraulic pump noise reduction package of this utility model when unfolded into a plane;

[0020] Figure 5 This is a three-dimensional structural diagram of the hydraulic pump noise reduction package of this utility model from a third perspective;

[0021] Explanation of reference numerals in the attached drawings: Hydraulic pump noise reduction package (1), hydraulic pump (2), motor (3); cavity (101), opening (102), oil pipe clearance hole (103), first material splice (104), second material splice (105), first end cap (106), third material splice (107), second end cap (108); inlet and outlet oil pipes (201). Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0023] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 When observing, the observer's left front side is designated as "front," the observer's right rear side as "rear," the observer's left rear side as "left," the observer's right front side as "right," the observer's top as "up," and the observer's bottom as "down." It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" in this text indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the present invention and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0024] See Figures 1 to 5This embodiment provides a hydraulic pump noise reduction package 1, which includes a flexible inner protective layer, a flexible sound-absorbing layer, and a flexible outer protective layer. The flexible inner protective layer is the inner wall of the hydraulic pump noise reduction package 1, and the flexible outer protective layer is the outer wall of the hydraulic pump noise reduction package 1. The flexible sound-absorbing layer is located between the flexible inner protective layer and the flexible outer protective layer. The interior of the hydraulic pump noise reduction package 1 is provided with a cavity 101 for placing a hydraulic pump 2. One end of the hydraulic pump noise reduction package 1 is provided with an opening 102 for the hydraulic pump 2 to extend into the cavity 101. The hydraulic pump noise reduction package 1 is provided with an oil pipe clearance hole 103 for the oil pipe 201 to pass through. The hydraulic pump noise reduction package 1 is also provided with a first material splicing point 104, which can be connected by stitching. Function: (1) The hydraulic pump noise reduction package includes a flexible inner protective layer, a flexible sound-absorbing layer and a flexible outer protective layer. The flexible inner protective layer is the inner wall of the hydraulic pump noise reduction package, the flexible outer protective layer is the outer wall of the hydraulic pump noise reduction package, and the flexible sound-absorbing layer is located between the flexible inner protective layer and the flexible outer protective layer; thereby ensuring the noise reduction effect while optimizing the hydraulic pump noise reduction package into a flexible noise reduction package structure. (2) The hydraulic pump noise reduction package has an internal cavity for placing the hydraulic pump. One end of the hydraulic pump noise reduction package has an opening for the hydraulic pump to extend into the cavity. The hydraulic pump noise reduction package has an oil pipe clearance hole for the inlet and outlet oil pipes to pass through. The hydraulic pump noise reduction package also has a first material splicing point, which can be connected by stitching. Therefore, during installation, the hydraulic pump noise reduction package can be directly fitted onto the hydraulic pump. The hydraulic pump extends into the cavity through the opening, and the inlet and outlet oil pipes pass outward through the oil pipe clearance hole. The splicing point of the hydraulic pump noise reduction package (i.e., the first material splicing point) is connected by stitching. It has good integration, simple installation, good reliability, good noise reduction effect, and light weight. As can be seen from the above analysis, compared with the prior art, the present invention optimizes the structure of the hydraulic pump noise reduction package from the rigid structure of the prior art of "outer metal shell + middle sound-absorbing cotton + inner micro-perforated plate" to a flexible noise reduction package structure. While ensuring the noise reduction effect, the structure is simpler, lighter, smaller, easier to install, and lower in cost, making it easier to apply.

[0025] Specifically, the top wall of the hydraulic pump noise reduction package 1 is provided with several oil pipe clearance holes 103 for the oil pipes 201 to pass through. Function: This allows the top of the hydraulic noise reduction package to have three openings for the hydraulic pump outlet pipeline to pass through (i.e., the upper oil pipe clearance holes 103).

[0026] Specifically, the bottom wall of the hydraulic pump noise reduction package 1 is provided with several oil pipe clearance holes 103 for the oil pipes 201 to pass through. Function: This allows the bottom of the hydraulic noise reduction package to have three openings for the hydraulic pump inlet pipe to pass through (i.e., the lower oil pipe clearance holes 103).

[0027] Specifically, the hydraulic pump noise reduction package 1 is cylindrical in shape, extending longitudinally, with an opening 102 located at the front end. The first material joint 104 is located on the side wall of the hydraulic pump noise reduction package 1, allowing it to unfold into a flat surface. Function: After the flat material of the hydraulic pump noise reduction package 1 is bent, the material joint can be connected with stitching, thus forming a cylindrical shape that can enclose the hydraulic pump.

[0028] In a preferred embodiment, the flexible inner protective layer, flexible sound-absorbing layer, and flexible outer protective layer are respectively fiberglass cloth, fiberglass mat, and fiberglass cloth. Function: This material arrangement provides good noise reduction (reducing pump near-field noise by 5-10 dB) and is lightweight.

[0029] Specifically, the thicknesses of the flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are 1mm±0.2mm, 10mm±2mm, and 1mm±0.2mm, respectively. A second material splicing point 105 is provided at the other end of the hydraulic pump noise reduction package 1. The second material splicing point 105 can be connected by stitching, and a flip-up first end cap 106 is formed on one side of the second material splicing point 105. Function: The inner layer (i.e., the flexible inner protective layer) and outer layer (i.e., the flexible outer protective layer) of this flexible noise reduction package (i.e., the hydraulic pump noise reduction package 1) are preferably made of 1mm thick gray high-strength fiberglass cloth, and the middle interlayer (i.e., the flexible sound-absorbing layer) is preferably 10mm thick high-strength fiberglass felt. The second material splicing point 105 is connected by stitching, resulting in better integration, simpler installation, and better reliability.

[0030] As another preferred embodiment, the flexible inner protective layer, flexible sound-absorbing layer, and flexible outer protective layer are non-woven fabric, PET sound-absorbing cotton, and fiberglass cloth, respectively. Function: This material arrangement provides good noise reduction (pump near-field noise can be reduced by 3-6 dB).

[0031] Specifically, the thickness of both the flexible inner protective layer and the flexible outer protective layer is 1mm ± 0.2mm, and the content per square meter of the flexible sound-absorbing layer (which can be considered as the thickness) is 450 ± 1g / m². 2 The other end of the hydraulic pump noise reduction package 1 has a third material splicing point 107, which can be attached with Velcro. A detachable second end cap 108 is formed on one side of the third material splicing point 107. Function: The inner layer (i.e., the flexible inner protective layer) of this flexible noise reduction package (i.e., the hydraulic pump noise reduction package 1) is preferably made of 1mm black non-woven fabric, and the interlayer (i.e., the flexible sound-absorbing layer) is preferably 450g / m². 2 The PET sound-absorbing cotton has an outer layer (i.e., a flexible outer protective layer) made of 1mm black fiberglass cloth. The main material is joined by stitching (i.e., the first material joint), and the second end cap 108 is connected to the main body (i.e., the third material joint 107) by Velcro, making installation simple.

[0032] This utility model also provides a hydraulic pump noise reduction structure, including a hydraulic pump 2 and a hydraulic pump noise reduction package 1 as described in any of the above technical solutions. The hydraulic pump noise reduction package 1 is fitted onto the hydraulic pump 2, and the inlet and outlet oil pipes 201 of the hydraulic pump 2 pass through the oil pipe clearance hole 103 of the hydraulic pump noise reduction package 1. Function: During installation, the hydraulic pump noise reduction package 1 can be directly fitted onto the hydraulic pump, making installation simple and providing good noise reduction effect. In actual operation, the hydraulic pump 2 is directly connected to the output shaft of the motor 3.

[0033] This utility model also provides an engineering machinery, including the engineering machinery body, and a hydraulic pump noise reduction package 1 or a hydraulic pump noise reduction structure according to any of the above-mentioned technical solutions, wherein the hydraulic pump noise reduction package 1 or the hydraulic pump noise reduction structure is disposed on the engineering machinery body. Function: The hydraulic pump noise reduction package 1 or the hydraulic pump noise reduction structure is applicable to the noise reduction of hydraulic pumps in most engineering machinery (such as electric loaders), thus effectively providing a flexible noise reduction package for hydraulic pumps in engineering machinery. When applied to electric loaders, it can solve the problem of excessive noise from the hydraulic pumps of electric loaders.

[0034] In summary, compared with the prior art, this utility model optimizes the structure of the hydraulic pump noise reduction package from the original rigid structure of "outer metal shell + middle sound-absorbing cotton + inner micro-perforated plate" to a flexible noise reduction package structure. While ensuring the noise reduction effect, the structure is simpler, lighter, smaller, easier to install, and lower in cost.

[0035] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A noise reduction package for a hydraulic pump, characterized in that: The hydraulic pump noise reduction package (1) includes a flexible inner protective layer, a flexible sound-absorbing layer and a flexible outer protective layer. The flexible inner protective layer is the inner wall of the hydraulic pump noise reduction package (1), and the flexible outer protective layer is the outer wall of the hydraulic pump noise reduction package (1). The flexible sound-absorbing layer is located between the flexible inner protective layer and the flexible outer protective layer. The interior of the hydraulic pump noise reduction package (1) is provided with a cavity (101) for placing the hydraulic pump (2). One end of the hydraulic pump noise reduction package (1) is provided with an opening (102) for the hydraulic pump (2) to extend into the cavity (101). The hydraulic pump noise reduction package (1) is provided with an oil pipe clearance hole (103) for the oil pipe (201) to pass through. The hydraulic pump noise reduction package (1) is also provided with a first material splicing point (104), which can be connected by stitch.

2. The hydraulic pump noise reduction package according to claim 1, characterized in that: The top wall of the hydraulic pump noise reduction package (1) is provided with several oil pipe clearance holes (103) through which the inlet and outlet oil pipes (201) can pass.

3. The hydraulic pump noise reduction package according to claim 2, characterized in that: The bottom wall of the hydraulic pump noise reduction package (1) is provided with several oil pipe clearance holes (103) through which the inlet and outlet oil pipes (201) can pass.

4. The hydraulic pump noise reduction package according to claim 3, characterized in that: The hydraulic pump noise reduction package (1) is cylindrical in shape, extending forward and backward in the length direction. The opening (102) is located at the front end of the hydraulic pump noise reduction package (1). The first material splice (104) is located on the side wall of the hydraulic pump noise reduction package (1) so that the hydraulic pump noise reduction package (1) can be unfolded into a plane.

5. A hydraulic pump noise reduction package according to any one of claims 1 to 4, characterized in that: The flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are respectively fiberglass cloth, fiberglass mat, and fiberglass cloth.

6. The hydraulic pump noise reduction package according to claim 5, characterized in that: The thicknesses of the flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are 1mm±0.2mm, 10mm±2mm, and 1mm±0.2mm, respectively; the other end of the hydraulic pump noise reduction package (1) is provided with a second material splice (105), which can be connected by stitching, and a flip-up first end cap (106) is formed on one side of the second material splice (105).

7. A hydraulic pump noise reduction package according to any one of claims 1 to 4, characterized in that: The flexible inner protective layer, the flexible sound-absorbing layer, and the flexible outer protective layer are respectively non-woven fabric, PET sound-absorbing cotton, and fiberglass cloth.

8. The hydraulic pump noise reduction package according to claim 7, characterized in that: The thickness of both the flexible inner protective layer and the flexible outer protective layer is 1 mm ± 0.2 mm, and the content of the flexible sound-absorbing layer per square meter is 450 ± 1 g / m². 2 The other end of the hydraulic pump noise reduction package (1) is provided with a third material splice (107), which can be attached with Velcro, and a removable second end cap (108) is formed on one side of the third material splice (107).

9. A noise reduction structure for a hydraulic pump, comprising a hydraulic pump (2), characterized in that: It also includes the hydraulic pump noise reduction package (1) according to any one of claims 1 to 8, the hydraulic pump noise reduction package (1) being fitted onto the hydraulic pump (2), and the inlet and outlet oil pipes (201) of the hydraulic pump (2) passing through the oil pipe clearance hole (103) of the hydraulic pump noise reduction package (1).

10. An engineering machinery, comprising an engineering machinery body, characterized in that: It also includes the hydraulic pump noise reduction package (1) as described in any one of claims 1 to 8, or the hydraulic pump noise reduction structure as described in claim 9, wherein the hydraulic pump noise reduction package (1) or the hydraulic pump noise reduction structure is disposed on the engineering machinery body.

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