CN112502932A

CN112502932A - Pump assembly and carrier

Info

Publication number: CN112502932A
Application number: CN202011089572.3A
Authority: CN
Inventors: 任宏婧
Original assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Current assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-03-16

Abstract

The present application provides a pump assembly and a carrier. The pump assembly includes: a first housing including a first shaft, a first pump body, and a second pump body; the first and second pump bodies are arranged adjacent to each other in the axial direction and driven by a first shaft, a first connecting surface being provided on the first housing; and a transmission assembly configured to be associated with the first shaft and including a first gear journaled on the first shaft; wherein the first gear is configured to selectively transmit power outward through the first connecting surface. The pump assembly and the carrier have the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like. The space occupation of the pump assembly is improved and the transmission efficiency is improved.

Description

Pump assembly and carrier

Technical Field

The present application relates to the field of pump construction. More particularly, the present application relates to a pump assembly that aims to provide an improved space size footprint. The present application also relates to a carrier comprising the above-mentioned pump assembly.

Background

Various hydraulic pumps have been developed to drive high pressure fluid in mobile hydraulic systems. Existing hydraulic pumps may comprise two or more pump bodies. At least a portion of these pumps may be disposed in the main housing, the pumps in the main housing also being referred to as the main pump. Another part of these pumps may be provided in an auxiliary housing, in which the pump is also referred to as an auxiliary pump. The pump bodies in the main pump are usually arranged separately in the radial direction, also known as side by side (side by side) structures. Each pump body is driven by a plurality of drive shafts arranged in the axial direction. The drive shafts can be driven by a transmission mechanism.

The main housing and the auxiliary housing of the existing hydraulic pump may be constructed as one body, may be constructed separately, and may be constructed to be connected by an end cover and a connector. A typical transmission may include three or more gear sets.

Disclosure of Invention

It is an object of an aspect of the present application to provide a pump assembly that aims to reduce the space occupation in the radial direction and improve the working efficiency. It is an object of another aspect of the present application to provide a vehicle comprising the above-described pump assembly.

The purpose of the application is realized by the following technical scheme:

a pump assembly, comprising:

a first housing including a first shaft, a first pump body, and a second pump body; the first and second pump bodies are arranged adjacent to each other in the axial direction and driven by a first shaft, a first connecting surface being provided on the first housing; and

a transmission assembly configured to be associated with the first shaft and including a first gear journaled on the first shaft;

wherein the first gear is configured to selectively transmit power outward through the first connecting surface.

In the above pump assembly, optionally, the first housing comprises:

a housing proximate the input end of the first shaft; and

a pump case that covers the first pump body and the second pump body;

wherein the first connecting surface is provided on the housing and the input end of the first shaft is connected to the power input source.

In the above pump assembly, optionally, the first connecting surface is configured as a rectangular opening, the rectangular opening extending parallel to the first axis and having its length direction perpendicular to the first axis.

In the above pump assembly, optionally, the first connecting surface is configured to be selectively covered by an end cap, or to connect to the second housing.

In the above pump assembly, optionally, the second housing includes a second shaft and a third pump body; wherein the transmission assembly extends from the first housing to the second housing and transmits power between the first shaft and the second shaft.

In the above pump assembly, optionally, the first shaft is arranged to extend in an axial direction and includes a first section for driving the first pump body and a second section for driving the second pump body, the first section and the second section being integrally connected and aligned end-to-end.

In the above pump assembly, optionally, the transmission assembly further comprises:

the second gear is sleeved on the second shaft; and

one or more transmission gears disposed between the first gear and the second gear and transmitting power from the first gear to the second gear, wherein a rotation shaft of the transmission gears is associated with the second housing.

In the above pump assembly, optionally, the transmission assembly is configured to extend through the first connection surface.

In the above pump assembly, optionally, the second housing comprises a first portion and a second portion, the first portion comprising the transmission assembly and the second portion comprising the third pump body, wherein the second portion is removably attached to the first portion at the second connection surface.

A vehicle comprising the pump assembly described above, wherein the vehicle comprises an excavator, a drilling rig and a crane.

Drawings

The present application will now be described in further detail with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that the drawings are designed solely for the purposes of illustrating preferred embodiments and that, accordingly, should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the depicted objects and may contain exaggerated displays. The figures are also not necessarily drawn to scale.

FIG. 1 is a schematic structural view of one embodiment of a pump assembly of the present application.

Fig. 2 is a perspective view of the embodiment shown in fig. 1.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward, and the like as used herein are defined with respect to the orientation in the drawings. These orientations are relative concepts and will therefore vary depending on the position and state in which they are located. These and other directional terms are not to be construed in a limiting sense.

Furthermore, it should also be noted that for any single technical feature described or implicit in the embodiments herein or shown or implicit in the drawings, these technical features (or their equivalents) can be continuously combined to obtain other embodiments not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

FIG. 1 is a schematic structural view of one embodiment of a pump assembly of the present application. The pump assembly comprises at least a first housing 100 and a second housing 200. The first housing 100 includes a first shaft 110 extending in the axial direction a, and the second housing 200 includes a second shaft 210 extending in the axial direction a. At least a first pump 101 and a second pump 102 may be disposed within the first casing 100, while at least a third pump 203 may be disposed within the second casing 200.

The axial direction referred to herein refers to the direction indicated by arrow a in fig. 1. For example, the axial direction may coincide with the direction of power input, or may coincide with the extending direction of the first housing 100. The radial direction referred to herein refers to a direction perpendicular to the axial direction. For example, the radial direction may be a direction starting from a point on the first axis 110 and perpendicular to the first axis 110.

The first pump body 101 and the second pump body 102 may be arranged in an axial direction and driven by a first shaft 110. Specifically, the first and

second pumps

101, 102 may be disposed adjacent to each other, and thus also referred to as a back-to-back (back-to-back) arrangement. The first shaft 110 may include a first section 111 for driving the first pump body 101 and a second section 112 for driving the second pump body 102, and the first section 111 and the second section 112 are integrally connected. Specifically, the first section 111 and the second section 112 are arranged adjacent to each other on the same straight line in the axial direction end to end, a spline or flat key connection structure is provided on the ends of the first section 111 and the second section 112, respectively, and the first section 111 and the second section 112 are integrally connected at the ends. By adopting the back-to-back structure, the space occupied by the first shell in the radial direction is reduced, thereby being beneficial to the installation of the pump assembly.

Further, one end of the first shaft 110 may extend from the first housing 100 and be connected to the power input source 400. This end of the first shaft 110 may also be referred to as an input end. In the illustrated embodiment, the power input source 400 provides power to rotate the first shaft 110 in the direction indicated by arrow B. For example, the first input shaft 110 may rotate in a clockwise or counterclockwise direction.

The second housing 200 includes a second shaft 210 and a third pump body 203. The second housing 200 is removably attached to the first housing 100 at the first connecting surface 201. In the illustrated embodiment, the first connection surface 201 is indicated by a dashed line and is arranged to extend in the axial direction or to be parallel to the axial direction. In other words, the first connection surface 201 may be disposed at a side of the first case 100. It is easily understood that the first and

second housings

100 and 200 may be separated from each other at the first connection surface 201 indicated by a dotted line. The first connection surface 201 may comprise corresponding flanges on the first housing 100 and the second housing 200. The flange may include one or more square flanges, and/or a plurality of attachment holes. By employing a removable connection structure, the design and installation flexibility of the pump assembly is improved.

The transmission assembly 300 is configured to transmit power between the first shaft 110 and the second shaft 210. The transmission assembly 300 may include a plurality of gears. In the illustrated embodiment, a first gear 301 is sleeved on the first shaft 110 and a second gear 302 is sleeved on the second shaft 210, with one or more transfer gears for transfer being arranged between the first gear 301 and the second gear 302. The illustrated embodiment provides a configuration in which the transmission assembly 300 includes three gears, and thus reduces the loss of mechanical transmission, improving transmission efficiency. Further, the rotation shaft of one or more transmission gears disposed between the first gear 301 and the second gear 302 may be disposed to be included in the second housing 200.

In the illustrated embodiment, the overall structure of the transmission assembly 300, the first housing 100, and the second housing 200 is shown. In another embodiment, the second housing 200 is absent and an end cap is provided at the first connection surface 201 to close. In this case, the transmission assembly 300 comprises only the first gear 301 associated with the first shaft 110. The first gear 301 still rotates with the first shaft 110 and is configured to selectively transmit power outward through the first connection surface 201. In this embodiment, "transmission to the outside" means transmission of power to the outside of the first housing 100. For example, in the illustrated embodiment having the first housing 100, the second housing 200, and the transmission assembly 300, the first gear 301 transmits power to the outside of the first housing 100 through the first connection surface 201, and the power is transmitted to the second housing 200. In an embodiment not shown without the second housing 200, the transmission assembly 300 does not transmit power outwards through the first connection surface 201.

The first connecting surface 201 is configured to be selectively extended therethrough by the transmission assembly 300. For example, in the embodiment shown in fig. 1, the transmission gear of the transmission assembly 300 spans the first connection surface 201 and thereby performs a mechanical transmission between the first gear 301 and the second gear 302. In another embodiment, the second housing 200 is separated from the first housing 100, and the transmission gear is removed from the first housing 100 together with the second housing 200, so there is no transmission gear crossing the first connection surface 201, and the first connection surface 201 may be selectively closed with an end cap, cover, or plate. That is, the first connection surface 201 may be selectively covered by an end cap, or may be connected to the second housing 200.

In one embodiment, the first connection surface 201 may be configured as a rectangular opening which is oriented to extend in the axial direction, i.e. the width direction of the rectangular contour of the rectangular opening may be arranged in the axial direction. Further, the length direction of the rectangular opening may be set perpendicular to the axial direction.

Additionally, the second housing 200 may include a first portion for receiving the transmission assembly 300 and a second portion for receiving the third pump body 203, and the first and second portions are removably attached together at the second connection surface 202. The second connection surface 202 may be arranged perpendicular to the axial direction, in other words, the second connection surface 202 may be arranged on a radial plane.

The first pump body 101, the second pump body 102, and the third pump body 203 may be configured to have a plunger pump structure. For example, one or more of the first, second, and

third pumps

101, 102, 203 may each include a plunger that reciprocates, a swash plate connected to the plunger, and a discharge passage selectively in fluid communication with the plunger. However, the present application is not limited to a particular pump configuration, and any other known pump configuration may be employed.

Further, the first housing 100 includes a cover 131 and a pump case 132. The casing 131 is arranged close to the input end of the first shaft 110, and the pump casing 132 encases the first pump body 101 and the second pump body 102. The first connecting surface 201 may be disposed on the casing 132, and the input end of the first shaft 110 is connected to the power input source 400. In the illustrated embodiment, the housing 131 may be configured with a flared or circular opening for connection with other mechanical or hydraulic components not shown. Further, the casing 131 and the pump casing 132 may be detachably attached together at the connection face 133.

Fig. 2 is a perspective view of the embodiment shown in fig. 1. As shown in fig. 2, the first and

second housings

100 and 200 are provided with first connection surfaces 201, respectively. The first connection surface 201 may be provided at a side of the first and

second housings

100 and 200, extending in the axial direction. The first connection surface 201 may comprise a flange, for example a flange with square flanges and connection holes, or a flange comprising only connection holes. The cover 131 may be constructed in a trumpet-shaped coupling structure with a coupling hole. Furthermore, a second connection surface 202 in the second housing 200 is schematically shown in fig. 2.

Further, although not shown, it is readily understood that the first connecting surface 201 may be provided with structures including, but not limited to, openings, slots, etc. through which the transmission assembly 300 passes. In one embodiment, the gears in the transmission assembly 300 extend through the first connection surface 201.

The present application also relates to a vehicle comprising a pump assembly as described above. In one embodiment, the vehicle includes an excavator, a drilling rig, a crane, and the like, such as a rotary drill or the like. A pump assembly according to the present application may be provided in a vehicle for delivering high pressure fluid. High pressure fluids include, but are not limited to, engine oil, lubricating oil, hydraulic oil, and the like.

The pump assembly and the carrier have the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like. The space occupation of the pump assembly is improved and the transmission efficiency is improved.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims of this application, provided that they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A pump assembly, comprising:

a first housing (100) comprising a first shaft (110), a first pump body (101) and a second pump body (102); the first pump body (101) and the second pump body (102) being arranged adjacent to each other in an axial direction and being driven by the first shaft (110), a first connection surface (201) being provided on the first housing (100); and

a transmission assembly (300) configured to be associated with the first shaft (110) and comprising a first gear (301) journalled on the first shaft (110);

wherein the first gear (301) is configured to selectively transmit power outwards through the first connection surface (201).

2. The pump assembly of claim 1, wherein the first housing (100) comprises:

a housing (131) proximate to an input end of the first shaft (110); and

a pump case (132) that covers the first pump body (101) and the second pump body (102);

wherein the first connecting surface (201) is provided on the casing (132) and the input end of the first shaft (110) is connected to a power input source (400).

3. The pump assembly according to claim 1, wherein the first connection surface (201) is configured as a rectangular opening extending parallel to the first axis (110) and having its length direction perpendicular to the first axis (110).

4. The pump assembly according to claim 1, wherein the first connection surface (201) is configured to be selectively covered by an end cap, or to connect to a second housing (200).

5. The pump assembly according to claim 4, wherein the second housing (200) comprises a second shaft (210) and a third pump body (203); wherein the transmission assembly (300) extends from the first housing (100) to the second housing (200) and transmits power between the first shaft (110) and the second shaft (210).

6. The pump assembly according to claim 1, characterized in that the first shaft (110) is arranged to extend in an axial direction and comprises a first section (111) for driving the first pump body (101) and a second section (112) for driving the second pump body (102), the first section (111) being integrally connected with the second section (112) and being aligned end-to-end.

7. The pump assembly of claim 5, wherein the drive assembly (300) further comprises:

a second gear (302) journalled on the second shaft (210); and

one or more transmission gears arranged between the first gear (301) and the second gear (302) and transmitting power from the first gear (301) to the second gear (302), wherein a rotation shaft of the transmission gears is associated with the second housing (200).

8. The pump assembly of claim 7, wherein the transmission assembly (300) is configured to extend through the first connection surface (201).

9. The pump assembly of claim 5, wherein the second housing (200) comprises a first portion and a second portion, the first portion comprising the transmission assembly (300) and the second portion comprising the third pump body (203), wherein the second portion is removably attached to the first portion at a second connection surface (202).

10. A vehicle comprising a pump assembly according to any one of claims 1-9, wherein the vehicle comprises an excavator, a drill rig and a crane.