Plunger pump assembly

Abstract

The utility model relates to the technical field of mechanical parts, in particular to a plunger pump assembly, which comprises a pump body, a return spring, a return spring seat and a plunger sleeve, a first cavity and a second cavity are arranged in the pump body, the first cavity is communicated with the second cavity, and the first cavity is communicated with the second cavity. The bottom in the second cavity is sleeved with a plunger sleeve, and a return spring is installed at the bottom in the plunger sleeve through a return spring seat. An oil pump blocking assembly is clamped to the top of the first cavity, a steel ball is arranged in the first cavity, and an oil stop spring is clamped between the steel ball and the oil pump blocking assembly. The plunger pump assembly achieves the working process of continuous oil pumping, stability is high, the effect is outstanding, the one-way valve is designed to prevent oil return, and the oil pumping efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical accessory technical field, concretely relates to a plunger pump assembly. BACKGROUND

[0002] The plunger pump changes the volume of the chamber by the reciprocating motion of the plunger rod in the cylinder, thereby generating a pressure difference to input fluid. The total stroke L of the reciprocating motion of the plunger is constant, which is determined by the lift of the cam. The oil supply amount per cycle of the plunger depends on the oil supply stroke, which is variable and not controlled by the cam shaft. The oil supply start time does not change with the change of the oil supply stroke, but the rotation of the plunger can change the oil supply end time, thereby changing the oil supply amount. The plunger pump assembly is a key component of the plunger pump, which involves various core components of the plunger pump and their mutual cooperation, and is used for the plunger pump assembly of the PTO box in the front-mounted hitch of agricultural machinery.

[0003] The existing plunger pump assembly cannot realize the working process of continuous pumping, has low stability, the effect is not outstanding, cannot prevent backflow, and the pumping efficiency is low. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems in the prior art, the utility model provides a plunger pump assembly, which realizes the working process of continuous pumping, has high stability, the effect is outstanding, is designed with a check valve to prevent backflow, and improves the pumping efficiency.

[0005] The utility model solves the technical problems by adopting the technical scheme of a plunger pump assembly, which comprises a pump body, a return spring, a return spring seat and a plunger sleeve, the pump body comprises a first cavity and a second cavity, the first cavity and the second cavity are in communication, the bottom of the second cavity is sleeved with the plunger sleeve, and the bottom of the plunger sleeve is installed with the return spring through the return spring seat.

[0006] The top of the first cavity is clamped with an oil pump plug assembly, a steel ball is arranged in the first cavity, and a check spring is clamped between the steel ball and the oil pump plug assembly.

[0007] By adopting the above technical scheme, the plunger pump assembly realizes the working process of continuous pumping, has high stability, the effect is outstanding, is designed with a check valve to prevent backflow, and improves the pumping efficiency.

[0008] Specifically, the bottom end of the return spring is located in the plunger sleeve and is sleeved on the outside of the return spring seat.

[0009] Specifically, the return spring seat is T-shaped, and the top end of the oil pump plug assembly is located on the outside of the pump body.

[0010] Specifically, the bottom end of the plunger sleeve is provided with a U-shaped groove, and a roller pin bearing is installed in the U-shaped groove through a roller pin.

[0011] By adopting the technical scheme, the U-shaped groove is designed for the movement of the roller pin bearing on the plunger sleeve, interference is avoided, the plunger sleeve movement guiding effect is effectively achieved, product stability is increased, and the service life of the roller pin bearing is increased.

[0012] Specifically, the pump body is made of nodular cast iron and is designed using a casting blank.

[0013] By adopting the technical scheme, the friction fit of the reciprocating movement of the plunger sleeve in the pump body is met, the casting blank design can be used, the raw material cost of the pump body machining is reduced, the actual machining time is reduced, and the production efficiency is improved.

[0014] The utility model discloses the beneficial effect:

[0015] (1) a kind of plunger pump assembly of the utility model, this is a kind of plunger pump assembly for the front suspension PTO box of agricultural machinery, by the rotation of camshaft in box, plunger pump assembly's roller pin bearing is applied pressure, the plunger sleeve connected with roller pin bearing is compressed and moves in pump body, and hydraulic oil is pumped out, then plunger sleeve is reset by return spring, oil is sucked from oil hole, after reaching stroke top, again be compressed by the rotation of camshaft, pump in the oil that is sucked, by this reciprocating motion, to realize the working process of continuous oil pumping.

[0016] (2) a kind of plunger pump assembly of the utility model, wherein outlet oil circuit, design has one-way valve to prevent back oil, improve oil pumping efficiency, one-way valve uses oil stop spring and steel ball design, under the condition that meet the sealing requirement of one-way valve, can significantly reduce production cost, pump body adopts nodular cast iron design, meet the friction fit of the reciprocating movement of plunger sleeve in it, can use casting blank design, reduce the raw material cost of pump body machining, and actual machining time, improve production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further described below in connection with drawings and examples.

[0018] Figure 1 It is whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the utility model Figure 1 Sectional view of A-A place;

[0020] Figure 3 It is the utility model's explosion diagram.

[0021] In the drawing: 1, oil pump plug assembly; 2, pump body; 3, oil stop spring; 4, steel ball; 5, return spring; 6, return spring seat; 7, plunger sleeve; 8, roller pin; 9, roller pin bearing; 10, first cavity; 11, second cavity. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0023] In order to realize the working process of continuous oil pumping of the plunger pump assembly, the stability is high, the effect is outstanding, the one-way valve is designed to prevent backflow, and the oil pumping efficiency is improved, such as Figures 1-3 The utility model discloses a plunger pump assembly, including pump body 2, return spring 5, return spring seat 6 and plunger sleeve 7, the first cavity 10 and the second cavity 11 are included in pump body 2, the first cavity 10 and the second cavity 11 are communicated, the plunger sleeve 7 is set in the bottom of the second cavity 11, and the return spring 5 is installed in the bottom of the plunger sleeve 7 through the return spring seat 6.

[0024] The first cavity 10 top clamping has oil pump plug assembly 1, the first cavity 10 is provided with steel ball 4, and the oil pump plug assembly 1 is clamped between steel ball 4 and oil pump plug assembly 1.

[0025] In use, the plunger pump assembly realizes the working process of continuous oil pumping, the stability is high, the effect is outstanding, the one-way valve is designed to prevent backflow, and the oil pumping efficiency is improved.

[0026] Exemplarily, as shown in Figure 2 The utility model further includes that the bottom end of the return spring 5 is located in the plunger sleeve 7 and is sleeved on the outside of the return spring seat 6.

[0027] In use, then the plunger sleeve 7 is reset through the return spring 5, oil is sucked from the oil hole, and after reaching the stroke top end, the oil sucked is pumped out again by the rotation compression of the camshaft.

[0028] Exemplarily, as shown in Figure 2 The utility model further includes that the return spring seat 6 is T-shaped, and the top end of the oil pump plug assembly 1 is located on the outside of the pump body 2.

[0029] In use, the oil pump plug assembly 1 plays a sealing effect, the return spring seat 6 is T-shaped and has high stability, and displacement is prevented.

[0030] Exemplarily, as shown in Figure 2 The utility model further includes that the bottom end of the plunger sleeve 7 is provided with a U-shaped groove, and the U-shaped groove is provided with a roller pin bearing 9 through a roller pin 8.

[0031] In use, the U-shaped groove is designed for the movement of the roller pin bearing 9 on the plunger sleeve 7, which can effectively play a guiding role for the movement of the plunger sleeve 7 while avoiding interference, increase the stability of the product, and increase the service life of the roller pin bearing 9.

[0032] As shown in the drawings, Figure 2 The pump body 2 is made of nodular cast iron and uses a casting blank design.

[0033] In use, the reciprocating movement of the plunger sleeve 7 in the pump body 2 is matched with friction, the casting blank design can be used, the raw material cost of the pump body 2 is reduced, the actual machining time is reduced, and the production efficiency is improved.

[0034] In use, the reciprocating movement of the plunger sleeve 7 in the pump body 2 is matched with friction, the casting blank design can be used, the raw material cost of the pump body 2 is reduced, the actual machining time is reduced, and the production efficiency is improved.

[0035] The oil outlet oil path is designed with a one-way valve to prevent backflow and improve oil pumping efficiency. The one-way valve is designed with an oil stop spring 3 and a steel ball 4, which can significantly reduce production cost while meeting the sealing requirements of the one-way valve. The pump body 2 is made of nodular cast iron, which can be matched with the reciprocating movement of the plunger sleeve 7 in the pump body 2, and the casting blank design can be used to reduce the raw material cost of the pump body 2 and the actual machining time, thereby improving the production efficiency.

[0036] At the matching end of the plunger sleeve 7 of the pump body 2, a U-shaped groove is designed for the movement of the roller pin bearing 9 on the plunger sleeve 7, which can effectively guide the movement of the plunger sleeve 7 and increase the service life of the roller pin bearing 9.

[0037] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A plunger pump assembly, characterized by It includes pump body (2), return spring (5), return spring seat (6) and plunger sleeve (7), the pump body (2) includes first cavity (10) and second cavity (11) inside, the first cavity (10) and second cavity (11) are communicated, the second cavity (11) is equipped with plunger sleeve (7) in bottom and return spring (5) is installed in plunger sleeve (7) bottom through return spring seat (6); The first cavity (10) top is clamped with oil pump plug assembly (1), the first cavity (10) is provided with steel ball (4) and is clamped with oil stop spring (3) between steel ball (4) and oil pump plug assembly (1).

2. A plunger pump assembly according to claim 1, wherein, The bottom end of the return spring (5) is located in the plunger sleeve (7) and is sleeved on the outside of the return spring seat (6).

3. A plunger pump assembly according to claim 1, wherein, The return spring seat (6) is T-shaped, and the top end of the oil pump plug assembly (1) is located outside the pump body (2).

4. A plunger pump assembly according to claim 1, wherein, The bottom end of the plunger sleeve (7) is provided with a U-shaped groove, and the U-shaped groove is provided with a roller pin bearing (9) through a roller pin (8).

5. A plunger pump assembly according to claim 1, wherein, The pump body (2) is made of nodular cast iron and uses a casting blank design.

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