Gear pump assembly with pump and valve integrated structure

Abstract

The utility model discloses a pump valve integrated structure's gear pump assembly relates to gear pump technical field, it includes gear pump and be provided the control valve on the gear pump, the gear pump includes pump body, in the pump body is vertically provided with driving shaft and driven shaft side by side, and the driving shaft is provided with driving gear, the driven shaft is provided with driven gear. A driven gear meshed with the driving gear is arranged on the driven shaft; an oil inlet is formed in the side surface of the pump body; the control valve comprises a valve body, and the valve body is located on the top of the pump body and forms an integrated structure with the pump body. A valve element is transversely arranged in the valve body, a port A and a port T are formed in the two sides of the valve body respectively, and a port P communicated with the pump body is formed in the bottom of the valve body. The pump and the control valve are combined into a whole, so that the installation space is saved, the cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, and more specifically to a gear pump assembly with an integrated pump-valve structure. Background Art

[0002] In traditional hydraulic systems, in order to be suitable for installation in various host factories, the hydraulic component pump and the control valve are assembled as two separate assemblies. This method not only makes assembly inconvenient but also takes up space, increases costs and reduces production efficiency. Summary of the Utility Model

[0003] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide a gear pump assembly with an integrated pump-valve structure, which combines the pump and the control valve into one, saves installation space, reduces costs and improves production efficiency.

[0004] To achieve the above object, the technical solution adopted by the utility model is: a gear pump assembly with an integrated pump-valve structure, including a gear pump and a control valve arranged on the gear pump. The gear pump includes a pump body, in which a driving shaft and a driven shaft are vertically arranged side by side, and a driving gear is arranged on the driving shaft, and a driven gear meshing with the driving gear is arranged on the driven shaft; an oil inlet is arranged on the side of the pump body; the control valve includes a valve body, which is located at the top of the pump body and forms an integrated structure with the pump body; a valve core is horizontally arranged in the valve body, and an A port and a T port are respectively arranged on both sides of the valve body, and a P port communicating with the pump body is arranged at the bottom of the valve body.

[0005] Further improvement lies in that: the lower end of the driving shaft penetrates out of the pump body.

[0006] Further improvement lies in that: an oil seal and an elastic retaining ring are arranged at the connection between the pump body and the lower end of the driving shaft.

[0007] Further improvement lies in that: the front end of the valve core penetrates out of the valve body, and a first return spring is arranged at the rear end of the valve core.

[0008] Further improvement lies in that: an opening is arranged at the position of the valve body opposite to the rear end of the valve core, and a first end cover is arranged at the opening.

[0009] Further improvement lies in that: a spring seat is arranged at the top of the valve body, a second return spring is arranged in the spring seat, a steel ball seat is arranged at the lower end of the second return spring, and a steel ball matching the valve core is arranged on the steel ball seat.

[0010] Further improvement lies in that: an opening is arranged at the position of the steel ball seat opposite to the upper end of the second return spring, and a second end cover is arranged at the opening.

[0011] A further improvement lies in that: the control valve further includes a horizontally arranged support column, which is located beside the front end of the valve core and is fixedly connected to the valve body through a nut.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The present utility model combines a pump and a control valve into one, saving installation space, reducing costs, and improving production efficiency. Moreover, the pump body is directly connected to the valve body, reducing the connecting rear cover part, improving product quality, and reducing leakage points. This structure is applicable to the chassis layouts of all vehicle manufacturers and can be flexibly assembled according to the requirements of vehicle manufacturers to quickly and conveniently provide products to customers. Description of the Drawings

[0014] Figure 1 It is the front view of the gear pump assembly with the pump-valve integrated structure in the embodiment of the present utility model;

[0015] Figure 2 is Figure 1 the left view of

[0016] Figure 3 is Figure 1 the top view of

[0017] Figure 4 is Figure 1 the bottom view of

[0018] Figure 5 is Figure 4 the sectional view taken along the A-A direction in

[0019] Figure 6 is Figure 4 the sectional view taken along the B-B direction in

[0020] Reference Signs:

[0021] 1 - gear pump; 101 - pump body; 102 - driving shaft; 103 - driving gear; 104 - driven shaft; 105 - driven gear; 106 - oil inlet.

[0022] 2 - control valve; 201 - valve body; 202 - valve core; 203 - first return spring; 204 - first end cover; 205 - spring seat; 206 - second return spring; 207 - second end cover; 208 - ball seat; 209 - ball body; 210 - support column; 211 - nut; 212 - port A; 213 - port T; 214 - port P. Detailed Embodiment

[0023] The embodiments of the present utility model will be described in detail below. The described embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end.

[0024] In the description of the present utility model, it should be noted that for the orientation terms, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly specified and defined, for the terms "assembled", "connected", and "joined", they should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may also be a mechanical connection; it can be directly connected, or connected through an intermediate medium, and can be internally connected and communicated between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the utility model, unless otherwise specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "below", and "on the upper side" of the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "above", "below", and "on the lower side" of the second feature includes the first feature being directly below or obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0028] The following further describes the specific embodiments of the present utility model in conjunction with the drawings of the specification, so that the technical solutions and their beneficial effects of the present utility model are clearer and more definite. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0029] SeeFigures 1 to 6 As shown in Figures 1 to 6 , an embodiment of the utility model provides a gear pump assembly with an integrated pump and valve structure, which includes a gear pump 1 and a control valve 2 arranged on the gear pump 1. The gear pump 1 includes a pump body 101. Inside the pump body 101, a driving shaft 102 and a driven shaft 104 are vertically arranged side by side. A driving gear 103 is arranged on the driving shaft 102, and a driven gear 105 meshing with the driving gear 103 is arranged on the driven shaft 104. An oil inlet 106 is arranged on the side of the pump body 101. Specifically, the lower end of the driving shaft 102 penetrates out of the pump body 101. An oil seal and a snap ring are arranged at the connection between the pump body 101 and the lower end of the driving shaft 102.

[0030] The control valve 2 includes a valve body 201, which is located at the top of the pump body 101 and forms an integrated structure with the pump body 101. A valve core 202 is horizontally arranged inside the valve body 201. An A port 212 and a T port 213 are respectively arranged on both sides of the valve body 201, and a P port 214 communicating with the pump body 101 is arranged at the bottom of the valve body 201. Specifically, the front end of the valve core 202 penetrates out of the valve body 201, and a first return spring 203 is arranged at the rear end of the valve core 202. An opening is arranged at the position of the valve body 201 opposite to the rear end of the valve core 202, and a first end cover 204 is arranged at the opening. A spring seat 205 is arranged at the top of the valve body 201. A second return spring 206 is arranged inside the spring seat 205. A steel ball seat 208 is arranged at the lower end of the second return spring 206, and a steel ball 209 adapted to the valve core 202 is arranged on the steel ball seat 208. An opening is arranged at the position of the steel ball seat 208 opposite to the upper end of the second return spring 206, and a second end cover 207 is arranged at the opening. The control valve 2 further includes a horizontally arranged support column 210, which is located beside the front end of the valve core 202 and is fixedly connected to the valve body 201 through a nut 211.

[0031] The working principle of the utility model is as follows:

[0032] 1. Zero position state: Hydraulic oil enters from the oil suction port, and high-pressure oil is formed through the operation of the gear pump and enters the control valve from the P port. It returns to the fuel tank from the T port.

[0033] 2. Working state: Hydraulic oil enters from the oil suction port, and high-pressure oil is formed through the operation of the gear pump and enters the control valve from the P port. Pull the handle to drive the valve core to move. At this time, the T port is closed, and the hydraulic oil enters the oil cylinder from the A port, so that the oil cylinder drives the cargo box to lift and lower. During the working process, if the load is too large and the pressure of the hydraulic system exceeds the rated pressure set by the system, at this time, the relief valve opens and performs the unloading operation. At this time, the unloading hydraulic oil returns to the fuel tank from the T port. The relief valve always controls the system pressure within the rated pressure range and plays a safety protection role.

[0034] 3. Working completed state: After the work is completed, release the handle, and the spool returns to the zero position through the return spring. At this time, the hydraulic oil enters from the oil suction port of the gear pump, and the gear pump works to make the hydraulic oil enter the control valve from port P and return to the fuel tank from port T.

[0035] In the description of the specification, the description with reference to terms such as "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] Through the description of the above structure and principle, those skilled in the art should understand that the present invention is not limited to the above specific implementation manners. The improvements and substitutions using the well-known technologies in the art based on the present invention all fall within the protection scope of the present invention, which should be defined by each claim.

Claims

1. A gear pump assembly with a pump-valve integrated structure, comprising a gear pump (1) and a control valve (2) arranged on the gear pump (1), characterized in that: The gear pump (1) comprises a pump body (101), wherein a driving shaft (102) and a driven shaft (104) are arranged vertically side by side in the pump body (101), a driving gear (103) is arranged on the driving shaft (102), and a driven gear (105) meshing with the driving gear (103) is arranged on the driven shaft (104); an oil inlet (106) is arranged on the side of the pump body (101); The control valve (2) comprises a valve body (201), which is located at the top of the pump body (101) and forms an integrated structure with the pump body (101); a valve core (202) is arranged transversely in the valve body (201), and an A port (212) and a T port (213) are respectively arranged on both sides of the valve body (201); and a P port (214) connected to the pump body (101) is arranged at the bottom of the valve body (201).

2. The gear pump assembly with integrated pump-valve structure according to claim 1, characterized in that: The lower end of the driving shaft (102) passes through the pump body (101).

3. The gear pump assembly with a pump-valve integrated structure according to claim 2, characterized in that: An oil seal and an elastic retaining ring are provided at the connection between the pump body (101) and the lower end of the driving shaft (102).

4. The gear pump assembly with a pump-valve integrated structure according to claim 1, characterized in that: The front end of the valve core (202) passes through the valve body (201), and the rear end of the valve core (202) is provided with a first return spring (203).

5. The gear pump assembly with a pump-valve integrated structure according to claim 4, characterized in that: An opening is provided at a position of the valve body (201) opposite to the rear end of the valve core (202), and a first end cover (204) is provided at the opening.

6. The gear pump assembly with a pump-valve integrated structure according to claim 1, characterized in that: A spring seat (205) is arranged at the top of the valve body (201), a second return spring (206) is arranged inside the spring seat (205), a steel ball seat (208) is arranged at the lower end of the second return spring (206), and a steel ball (209) adapted to the valve core (202) is arranged on the steel ball seat (208).

7. The gear pump assembly with a pump-valve integrated structure according to claim 6, characterized in that: An opening is provided at a position of the steel ball seat (208) opposite to the upper end of the second return spring (206), and a second end cover (207) is provided at the opening.

8. The gear pump assembly with a pump-valve integrated structure according to claim 1, characterized in that: The control valve (2) further comprises a transversely arranged support column (210), wherein the support column (210) is located beside the front end of the valve core (202) and is fixedly connected to the valve body (201) via a nut (211).

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