High-speed power takeoff pump assembly

Abstract

The utility model discloses a high-speed power takeoff pump assembly, which relates to the technical field of power takeoff pumps and comprises a pump body, a driving shaft and a driven shaft are arranged in the pump body side by side, a driving gear is arranged on the driving shaft, and a driven gear meshed with the driving gear is arranged on the driven shaft. A spline shaft is further included; a piston cavity is formed in the driving shaft, the opening end of the piston cavity is located at the front end of the driving shaft, and a connecting base is arranged on the inner wall of the rear end of the piston cavity. The rear end of the spline shaft is slidably arranged in the piston cavity, and a mounting seat is arranged at the rear end of the spline shaft and connected with the connecting seat through a tension spring; the front end of the spline shaft extends out of the pump body; the pump body is provided with an air inlet communicated with the piston cavity. According to the utility model, the power takeoff of the whole vehicle is reduced, the installation space is saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power take-off pumps, and more specifically to a high-speed power take-off pump assembly. Background Art

[0002] In traditional gear pumps, the connection with the transmission is controlled by a power take-off to engage and disengage. Installing the power take-off occupies the vehicle's space layout and increases costs, and is not conducive to the layout of new energy vehicle models. In order to be applicable to the installations of various vehicle manufacturers, solve the problems of inconvenient assembly, space occupation, cost increase, and production efficiency reduction, it is urgent to develop a high-speed power take-off pump assembly. 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 high-speed power take-off pump assembly, the product of this structure reduces the vehicle's power take-off, saves installation space at the same time, and reduces costs.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a high-speed power take-off pump assembly, including a pump body, in which a driving shaft and a driven shaft are arranged side by side. A driving gear is arranged on the driving shaft, and a driven gear meshing with the driving gear is arranged on the driven shaft; it also includes a spline shaft; a piston cavity is arranged inside the driving shaft, and the open end of the piston cavity is located at the front end of the driving shaft, and a connecting seat is arranged on the inner wall at the rear end of the piston cavity; the rear end of the spline shaft is slidably arranged inside the piston cavity, and an installation seat is arranged at the rear end of the spline shaft, and the installation seat is connected with the connecting seat through a tension spring; the front end of the spline shaft extends out of the pump body; the pump body is provided with an air inlet communicating with the piston cavity.

[0005] Further improvement lies in that: a central air passage is arranged inside the spline shaft, one end of the central air passage communicates with the piston cavity, and the other end of the central air passage communicates with the air inlet.

[0006] Further improvement lies in that: the air inlet is provided with a pneumatic quick connector.

[0007] Further improvement lies in that: oil seals are arranged on both the driving shaft and the spline shaft.

[0008] Further improvement lies in that: a front cover is arranged at the front end of the pump body, a rear cover is arranged at the rear end of the pump body, and the air inlet is located on the front cover.

[0009] Further improvement lies in that: a plug cover is arranged at the rear end of the piston cavity, and the connecting seat is located on the plug cover.

[0010] Further improvement lies in that: a sealing ring for sealing the piston cavity is arranged at the rear end of the spline shaft.

[0011] The beneficial effect of the utility model lies in that:

[0012] The utility model is small in volume and light in weight, which is convenient for the reasonable layout of the hydraulic system, saves the installation space, reduces the cost, improves the production efficiency, and is especially suitable for the working environment of medium and low pressure. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the high-speed power take-off pump assembly in the embodiment of the utility model;

[0014] Figure 2 is Figure 1 a sectional view taken along the line A-A in

[0015] Figure 3 is Figure 1 a sectional view taken along the line B-B in

[0016] Reference Numerals:

[0017] 1 - pump body; 11 - air inlet; 12 - pneumatic quick connector;

[0018] 2 - driving shaft; 21 - driving gear; 22 - piston chamber; 23 - connecting seat;

[0019] 3 - spline shaft; 31 - mounting seat; 32 - tension spring;

[0020] 4 - driven shaft; 41 - driven gear. Detailed Description of the Embodiment

[0021] The embodiments of the utility model will be described in detail below. The illustrated embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0022] In the description of the present utility model, it should be noted that for the orientation terms, such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationships shown in the accompanying 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.

[0023] The technical solutions and their beneficial effects of the present utility model will be made clearer and more definite by further describing the specific embodiments of the present utility model in conjunction with the drawings of the specification. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0024] See Figures 1 to 3 As shown, an embodiment of the present utility model provides a high-speed power take-off pump assembly, which includes a pump body 1. Inside the pump body 1, a driving shaft 2 and a driven shaft 4 are arranged side by side. A driving gear 21 is arranged on the driving shaft 2, and a driven gear 41 meshing with the driving gear 21 is arranged on the driven shaft 4. It also includes a spline shaft 3. Specifically, a front cover is arranged at the front end of the pump body 1, and a rear cover is arranged at the rear end of the pump body 1. The air inlet 11 is located on the front cover.

[0025] A piston cavity 22 is arranged inside the driving shaft 2, and the open end of the piston cavity 22 is located at the front end of the driving shaft 2. A connecting seat 23 is arranged on the inner wall at the rear end of the piston cavity 22. Specifically, a plug cover is arranged at the rear end of the piston cavity 22, and the connecting seat 23 is located on the plug cover.

[0026] The rear end of the spline shaft 3 is slidably arranged inside the piston cavity 22, and an installation seat 31 is arranged at the rear end of the spline shaft 3. The installation seat 31 is connected with the connecting seat 23 through a tension spring 32. The front end of the spline shaft 3 extends out of the pump body 1. Specifically, oil seals are arranged on both the driving shaft 2 and the spline shaft 3. A sealing ring for sealing the piston cavity 22 is arranged at the rear end of the spline shaft 3.

[0027] The pump body 1 is provided with an air inlet 11 communicating with the piston cavity 22. Specifically, a central air passage is arranged inside the spline shaft 3. One end of the central air passage communicates with the piston cavity 22, and the other end communicates with the air inlet 11. A pneumatic quick connector 12 is arranged at the air inlet 11.

[0028] The working principle of the present utility model is as follows:

[0029] Inside the driving shaft of the present utility model is a piston cavity, and the output spline shaft is a piston rod. An air inlet is added to the front cover, and rotary shaft seals are respectively arranged at the driving gear shaft at the front cover end and the output spline shaft to form an air chamber. A sealing plug cover is installed at the tail end of the driving gear shaft at the pump body end, and a sealing ring is installed at the tail end of the output spline shaft, so that a piston cavity is formed at the rear end of the driving gear shaft. A snap ring is installed at the lower fulcrum of the piston in the piston cavity for position limitation. A tension spring is installed between the bottom end of the spline shaft and the plug cover; an air inlet hole communicating with the air inlet is machined inside the output spline shaft. Under normal circumstances, the power take-off pump is in a disconnected state (the spline shaft is placed at the lower fulcrum of the piston cavity by the tension spring). When the air valve is opened, compressed air enters the piston cavity through the central air passage of the spline shaft, and the air pressure makes the spline shaft move out to engage with the transmission gear, forming power output transmission.

[0030] 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 utility model. The schematic description of the above terms in this specification does 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.

[0031] Through the description of the above structures and principles, those skilled in the art should understand that the present utility model is not limited to the above specific embodiments. Improvements and substitutions using well-known techniques in the art based on the present utility model fall within the protection scope of the present utility model, which should be defined by each claim.

Claims

1. A high-speed power take-off pump assembly, comprising a pump body (1), wherein a driving shaft (2) and a driven shaft (4) are arranged side by side in the pump body (1), a driving gear (21) is arranged on the driving shaft (2), and a driven gear (41) meshing with the driving gear (21) is arranged on the driven shaft (4); characterized in that: It further includes a spline shaft (3); A piston chamber (22) is provided inside the driving shaft (2), and the open end of the piston chamber (22) is located at the front end of the driving shaft (2). A connecting seat (23) is provided on the inner wall at the rear end of the piston chamber (22); The rear end of the spline shaft (3) is slidably arranged inside the piston chamber (22), and a mounting seat (31) is provided at the rear end of the spline shaft (3). The mounting seat (31) is connected to the connecting seat (23) through a tension spring (32); the front end of the spline shaft (3) extends out of the pump body (1); The pump body (1) is provided with an air inlet (11) communicating with the piston chamber (22).

2. The high-speed power take-off pump assembly according to claim 1, wherein: A central air passage is provided inside the spline shaft (3). One end of the central air passage communicates with the piston chamber (22), and the other end of the central air passage communicates with the air inlet (11).

3. The high-speed power take-off pump assembly according to claim 1, wherein: The air inlet (11) is provided with a pneumatic quick connector (12).

4. The high-speed power take-off pump assembly according to claim 1, wherein: Oil seals are provided on both the driving shaft (2) and the spline shaft (3).

5. The high-speed power take-off pump assembly according to claim 1, characterized in that: A front cover is provided at the front end of the pump body (1), and a rear cover is provided at the rear end of the pump body (1). The air inlet (11) is located on the front cover.

6. The high-speed power take-off pump assembly according to claim 1, characterized in that: A plug cover is provided at the rear end of the piston chamber (22), and the connecting seat (23) is located on the plug cover.

7. The high-speed power take-off pump assembly according to claim 1, characterized in that: A sealing ring for sealing the piston chamber (22) is provided at the rear end of the spline shaft (3).

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